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Home My WebLink About6239_BLD6239_2025 CITY OF ARLINGTON 18204 59th Avenue NE, Arlington, WA 98223 INSPECTIONS: 360-403-3417 - Permit Center: 360-403-3551 BUILDING PERMIT 4508 194TH PL NE Permit #: 6239 PERMIT EXPIRES 180 DAYS AFTER Parcel #: 00928200006600 DATE OF ISSUANCE. Scope of Work: LIKE FOR LIKE FURNACE CHANGE OUT Valuation: 4584.90 OWNER APPLICANT CONTRACTOR FREED JASON A BARRON HEATING & A/C INC Barron Heating 4508 194TH PL NE 5100 PACIFIC HWY 4601 S 134th Pl ARLINGTON, WA 98223-4768 FERNDALE, WA 98248 Seattle, WA 98168 360-676-1131 2062487900 LIC: 600 092 564 EXP: 03/31/2025 LIC: BARROHA179D7 EXP: 10/23/2026 MECHANICAL CONTRACTOR PLUMBING CONTRACTOR LIC #: EXP: LIC #: EXP: JOB DESCRIPTION PERMIT TYPE: RESIDENTIAL MECHANICAL CODE YEAR: 2021 STORIES: 1 CONST. TYPE: VB DWELLING UNITS: OCC GROUP: R-3; Residential BUILDINGS: OCC LOAD: PERMIT APPROVAL The issuance or granting of this permit shall not be construed to be a permit for, or approval of, any violation of this Code or any other ordinance or order of the City, of any state or federal law, or of any order, proclamation, guidance advice or decision of the Governor of this State. To the extent the issuance or granting of this permit is interpreted to allow construction activity during any period of time when such construction is prohibited or restricted by any state or federal law, or order, proclamation, guidance advice or decision of the Governor of this State, this permit shall not authorize such work and shall not be valid. The building official is authorized to prevent occupancy or use of a structure where in violation of this Code, any other City ordinances of this jurisdiction or any other ordinance or executive order of the City, or of any state or federal law, or of any order, proclamation, guidance advice or decision of the Governor. The building official is authorized to suspend or revoke this permit if it is determined to be issued in error or on the basis of incorrect, inaccurate or incomplete information, or in violation of any City ordinance, regulation or order, state or federal law, or any order, proclamation, guidance or decision of the Governor. I AGREE TO COMPLY WITH CITY AND STATE LAWS REGULATING CONSTRUCTION AND IN DOING THE WORK AUTHORIZED THEREBY; NO PERSON WILL BE EMPLOYED IN VIOLATION OF THE LABOR CODE OF THE STATE OF WASHINGTON RELATING TO WORKMEN'S COMPENSATION INSURANCE AND RCW 18.27. THIS APPLICATION IS NOT A PERMIT UNTIL SIGNED BY THE BUILDING OFFICIAL OR HIS/HER DEPUTY AND ALL FEES ARE PAID. IT IS UNLAWFUL TO USE OR OCCUPY A BUILDING OR STRUCTURE UNTIL A FINAL INSPECTION HAS BEEN MADE AND APPROVAL OR A CERTIFICATE OF OCCUPANCY HAS BEEN GRANTED. IBC110/IRC110. SALES TAX NOTICE: Sales tax relating to construction and construction materials in the City of Arlington must be reported on your sales tax return form and coded City of Arlington #3101. 11/19/2024 Applicant Signature Date Building Official Date CONDITIONS Adhere to approved mechanical equipment. Permit shall be onsite for inspection. Call for final inspection. The property owner shall ensure that the construction project complies with all applicable zoning codes and regulations. The property owner shall also ensure that the construction project does not cause any adverse impact on the surrounding environment or community. The property owner shall be responsible for obtaining all necessary permits and approvals from the relevant authorities before commencing construction. The property owner shall ensure that the construction project complies with all applicable design review requirements. THIS PERMIT AUTHORIZES ONLY THE WORK NOTED. THIS PERMIT COVERS WORK TO BE DONE ON PRIVATE PROPERTY ONLY. ANY CONSTRUCTION ON THE PUBLIC DOMAIN (CURBS, SIDEWALKS, DRIVEWAYS, MARQUEES, ETC.) WILL REQUIRE SEPARATE PERMISSION. PERMIT FEES Date Description Fee Amount 11/19/2024 Processing/Technology $25.00 11/19/2024 Inspection $75.00 11/19/2024 Forced Air Heat â‰¤ 100 BTU/h $15.00 11/19/2024 Mechanical Base $25.00 Total Due: $140.00 Total Payment: $140.00 Balance Due: $0.00 CALL FOR INSPECTIONS Call by 3:30 pm for next day inspection, allow 48 hours for Fire Inspections When calling for an inspection please leave the following information: Permit Number, Type of Inspection being requested, and whether you prefer morning or afternoon INSPECTION INFORMATION Pass/Fail RESIDENTIAL MECHANICAL APPLICATION Community and Economic Development City of Arlington â€¢ 18204 59th Ave NE â€¢ Arlington, WA 98223 â€¢ Phone (360) 403-3551 This application is for new, addition, altered or replaced mechanical installation and new or altered gas piping. Please fill out all pages of this application and include all information. Type of Permit: ï² New Installation ï² Addition/Alteration/Repair ï² Gas Piping 4508 194TH PLACE NE $4584.90 Property Address: Project Valuation: Lot #: Parcel ID No.: 00928200006600 Preferred Contact: ï² Owner ï² Contractor LIKE FOR LIKE FURANCE CHANGE OUT Project Description: JASON & JESSICA FREED (425) 501-5154 Owner Name: Home No.: Email Address: JASONFREED23@YAHOO.COM Cell No.: 4508 194TH PL NE ARLINGTON WA 98223 Mailing Address: City: State: Zip: BARRON HEATING & A/C INC (360) 676-1131 Contractor Name: Office No.: Email Address: AMYE@BARRONHEATING.COM Cell No.: 5100 PACIFIC HWY FERNDALE WA 98248 Mailing Address: City: State: Zip: BARROHA179D7 10/23/2026 L&I Contractor License Number: Expiration Date: â€¢ New gas piping requires a pressure test hooking to any appliance â€¢ Sediment traps (drips) are required on all gas lines â€¢ Gas lines are required to be supported/secured every 6 to 8 feet â€¢ Proper Combustion air and venting required for all appliances â€¢ A shut-off valve is required within 6 feet of all appliances Gas Piping Information ï² Not Applicable ï² CSST ï²Brass ï²Other Proposed Piping Material: ï²Black Steel ï²Galvanized Steel _______________________________________ Proposed Piping Size: ï²Â½â€ ï² â…â€ ï² Â¾â€ ï² 1â€ ï² 1Â½â€ ï² 2â€ Distance from Meter to furthest Appliance: Total BTUâ€™s of all Appliances: Residential mechanical permits will be assessed a base fee, fee per unit, and inspection fee (plan review per Table 4-8 may be required for certain permits) Type of Fixture No. of Cost per Unit Subtotal Model No. Units Additional Plan Review fees x $ 75.00 = Air Conditioning Unit â‰¤ 100 Btu/h x $ 15.00 = Air Conditioning Unit > 100 Btu/h x $ 25.00 = Air Conditioning Unit > 500 Btu/hp x $ 50.00 = Air Handling Units x $ 15.00 = Base Mechanical Fee 1 x $ 25.00 = $ 25.00 Boiler <100Btu/h >3hp x $ 15.00 = REV03.2022 Page 1 of 3 Residential mechanical permits will be assessed a base fee, fee per unit, and inspection fee (plan review per Table 4-8 may be required for certain permits) Boiler >1 million Btu/h<50hp x $ 25.00 = Boiler >1.5 million Btu/h<50hp x $ 50.00 = Boiler >100Btu/h 3-15hp x $ 15.00 = Boiler >500Btu/h 15-30hp x $ 25.00 = Commercial Hoods -Type I x $ 25.00 = Commercial Hoods -Type II x $50.00 = Diffusers x $ 15.00 = Dryer Ducting x $ 15.00 = Ductwork (drawings required) x $ 25.00 = Evaporative Coolers x $ 15.00 = Exhaust/Ventilation Fans x $ 15.00 = Fireplace/Insert/Stove x $ 15.00 = Forced Air Heat â‰¤100 Btu/h 1 x $ 15.00 = 15.00 Forced Air Heat >100 Btu/h x $ 25.00 = Gas Clothes Dryer x $ 15.00 = Gas Fired Air Conditioning Unit â‰¤ 100 Btu/h x $ 15.00 = Gas Fired Air Conditioning Unit > 100 Btu/h x $ 25.00 = Gas Fired Air Conditioning Unit > 500 Btu/hp x $ 50.00 = Gas Piping â‰¤ 5 units x $ 15.00 = Gas Piping for each additional unit > 5 x $ 2.00 = Heat Exchangers x $ 15.00 = Heat Pump-Condensing Unit x $ 25.00 = Hot Water Heat Coils x $ 15.00 = Miscellaneous Appliance - regulated by $ 15.00 x = mechanical code, not otherwise specified Package Units â‰¤ 100 Btu / > 100 Btu x $ 25.00/$50.00 = Range/Cook top-Gas Fired x $ 15.00 = Refrigeration Unit â‰¤100Btu/h x $ 15.00 = Refrigeration Unit >100Btu/h x $ 25.00 = Refrigeration. Unit >500Btu/h x $ 50.00 = Re-inspection fee x $ 75.00 = Residential Range Hood x $ 15.00 = Unit Heaters â‰¤ 100 Btu/h x $ 15.00 = Unit Heaters >100 Btu/h x $ 25.00 = Variable Air Volume Boxes (part of Air $ 10.00 x = Conditioning System) Wall Heaters - Gas Fired x $ 25.00 = Water Heater - Gas Fired x $ 25.00 = Permit Fee 15.00 Inspection Fee $75.00 Processing/Technology Fee $25.00 Total 115.00 I hereby certify that the above information is correct and that the construction on, and the occupancy and the use of the above described property will be in accordance with the laws, rules and regulation of the State of Washington. AMY EARDLEY/ BARRON PERMITTING 11/19/2024 Signature Print Name Date REV2.2024 Page 2 of 3 PRESSURE PIPING SCHEMATIC COMPLETE FOR GAS PIPING ONLY ï² SCHEMATIC IS TO SCALE ï² SCHEMATIC NOT TO SCALE Show Pipe Size(s) and Length(s) from meter to all appliances NOTE: Any interior pressure regulators must be indicated REV2.2024 Page 3 of 3 INSTALLATION INSTRUCTIONS Â© 2023 Lennox Industries Inc. EL297UHV Dallas, Texas USA ELITEÂ® SERIES GAS FURNACE UP/FLOW HORIZONTAL AIR DISCHARGE 508358-01 05/2023 THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in man- uals, be alert to the potential for personal injury or death. WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a licensed professional HVAC installer or equivalent, service agency, or the gas supplier. NOTICE A thermostat is not included and must be ordered AIR FLOW UPFLOW separately. A communicating thermostat must be used in AIR communicating applications. FLOW FLOW In non-communicating applications, the Lennox AIR ComfortSenseÂ® 7500 thermostat may be used, as well HORIZONTAL LEFT HORIZONTAL RIGHT as other non-communicating thermostats. CAUTION In all cases, setup is critical to ensure proper system operation. As with any mechanical equipment, personal injury can Field wiring for both communicating and non- result from contact with sharp sheet metal edges. Be communicating applications is illustrated in diagrams, careful when you handle this equipment. which begin on Page 41. Table of Contents Integrated Control .........................................................51 Unit Dimensions - inches (mm) .....................................2 Conventional Thermostat (non-communicating) ...........52 Shipping and Packing List ..............................................3 Blower Data ..................................................................54 Safety Information ..........................................................3 On-Board Links.............................................................58 Use of Furnace as Construction Heater .........................4 Unit Start Up .................................................................60 General ...........................................................................5 Gas Pressure Adjustment .............................................61 Shipping Bolt Removal ...................................................8 Proper Combustion.......................................................62 Installation - Setting Equipment ......................................8 High Altitude .................................................................62 Filters ............................................................................13 Combustion Air for Non-Direct Vent Applications .........62 Duct System .................................................................13 Repair Parts..................................................................63 Pipe & Fittings Specifications .......................................14 Other Unit Adjustments.................................................64 Joint Cementing Procedure ..........................................15 Heating Sequence of Operation ...................................63 Venting Practices ..........................................................16 Service..........................................................................66 Gas Piping ....................................................................36 Program Unit Capacity/Size Mode ...............................68 Electrical .......................................................................39 Requirements for Commonwealth of Massachusetts ...69 Page 1 Unit Dimensions - inches (mm) 1 NOTE - 60C and 60D size units that require air volumes over 1800 cfm must have one of the following: 1. Single side return air and Optional Return Air Base with transition that must accommodate required 20 x 25 x 1 inch (508 x 635 x 25 mm) air filter to EXHAUST AIR 3-1/4 maintain proper velocity. (83) OUTLET 2. Bottom return air. 3. Return air from both sides. 1-7/8 (48) 4. Bottom and one side return air. See Blower Performance Tables for additional information. D 2 Optional Side Return Air Filter Kit is not for use with the Optional Return Air Base. SUPPLY AIR OPENING COMBUSTION Flue Condensate Trap Assembly AIR INTAKE Furnished for external 7 field installation (178) on either side of unit. 2 OPTIONAL SIDE RETURN 23-3/4 (See installation instructions (603) AIR FILTER KIT for additional (Either Side) 25 information.) (635) TOP VIEW A 1-1/2 (38) 27-3/4 Front Panel (705) B 19-7/16 9/16 9/16 (14) (494) (14) 6-9/16 (167) 2 (51) Left (Either Side) 9 (229) 2 Right GAS PIPING INLET OPTIONAL 12-5/8 (321) (Either Side) SIDE RETURN (Either Side) AIR FILTER KIT CONDENSATE (Either Side) TRAP CONNECTION 33 (Either Side) (838) 6-1/2 (165) ELECTRICAL (Either Side) INLET (Either Side) 23 1-1/2 14-3/4 (584) (38) (375) 1Side Return 14 16 Air Opening (356) (406) (Either Side) AIR FLOW 1-15/16 (49) 5/8 3/4 3/4 (16) 3-1/4 23-1/2 (19) C (19) (83) (597) 1 Bottom Return 1 Bottom Return Air Opening Air Opening FRONT VIEW SIDE VIEW Model A B C D EL297UH045XV36B 17âˆ’1/2 in 446 mm 16âˆ’3/8 in 416 mm 16 in 406 mm 7âˆ’5/8 in 194 mm EL297UH070XV36B EL297UH090XV36C EL297UH090XV48C EL297UH090XV60C 21 in 533 mm 19âˆ’7/8 in 505 mm 19âˆ’1/2 in 495 mm 9âˆ’3/8 in 238 mm EL297UH110XV48C EL297UH110XV60C EL297UH135XV60D 24âˆ’1/2 in 622 mm 23âˆ’3/8 in 594 mm 23 in 584 mm 11âˆ’1/8 in 283 mm Page 2 EL297UHV Gas Furnace Shipping and Packing List The EL297UHV Category IV gas furnace is shipped ready Package 1 of 1 contains for installation in the upflow or horizontal position. The fur- 1 - Assembled EL297UHV unit nace is shipped with the bottom panel in place. The bot- tom panel must be removed if the unit is to be installed 1 - Bag assembly containing the following: in horizontal or upflow applications with bottom return air. 1 - Snap bushing The EL297UHV can be installed as either a Direct Vent 1 - Snap plug or a Non-Direct Vent gas central furnace. 1 - Wire tie The furnace is equipped for installation in natural gas 1 - Condensate trap applications. A conversion kit (ordered separately) is re- 1 - Condensate trap cap quired for use in propane/LP gas applications. 1 - Condensate trap clamp NOTE - In Direct Vent installations, combustion air is tak- 1 - 2â€ diameter debris screen en from outdoors and flue gases are discharged outdoors. In Non-Direct Vent installations, combustion air is taken 1 - 3/4â€ Threaded street elbow from indoors or ventilated attic or crawlspace and flue Check equipment for shipping damage. If you find any gases are discharged outdoors. See for applications in- damage, immediately contact the last carrier. volving roof termination. The following items may also be ordered separately: 1 - Thermostat DIRECT VENT INSTALLATION NON-DIRECT VENT EXHAUST OUTLET INSTALLATION 1 - LP/Propane changeover kit COMBUSTION EXHAUST 1 - Return air base kit AIR INTAKE OUTSIDE OUTLET OF HOUSE 1 - Horizontal suspension kit 1 - High altitude pressure switch Safety Information CAUTION COMBUSTION AIR INTAKE As with any mechanical equipment, contact with sharp INSIDE sheet metal edges can result in personal injury. Take OF HOUSE care while handling this equipment and wear gloves and protective clothing. DANGER Danger of explosion. There are circumstances in which odorant used with LP/ Figure 1 propane gas can lose its scent. In case of a leak, LP/ propane gas will settle close to the floor and may be difficult to smell. An LP/propane leak detector should be NON-DIRECT VENT NON-DIRECT VENT INSTALLATION INSTALLATION installed in all LP applications. EXHAUST EXHAUST OUTLET OUTLET Use only the type of gas approved for use with this fur- nace. Refer to unit nameplate. EL297UHV units are CSA International certified to ANSI Z21.47 and CSA 2.3 standards. Building Codes COMBUSTION COMBUSTION AIR INTAKE INSIDE In the USA, installation of gas furnaces must conform with VENTILATED AIR INTAKE INSIDE local building codes. In the absence of local codes, units CRAWL SPACE VENTILATED ATTIC SPACE must be installed according to the current National Fuel Gas Code (ANSI-Z223.1/NFPA 54). The National Fuel Gas Code is available from the following address: American National Standards Institute, Inc. 11 West 42nd Street New York, NY 10036 In Canada, installation must conform with current National Figure 2 Standard of Canada CSA-B149 Natural Gas and Propane Installation Codes, local plumbing or waste water codes and other applicable local codes. Page 3 In order to ensure proper unit operation in non-direct vent applications, combustion and ventilation air supply must Heating Unit Installed Parallell to Air Handler Unit Dampers be provided according to the current National Fuel Gas (open during heating operation only) Code or CSA-B149 standard. Installation Locations Gas Unit This furnace is CSA International certified for installation clearances to combustible material as listed on the unit nameplate and in the table in Figure 12. Accessibility and Air Handler Unit service clearances must take precedence over fire protec- Dampers tion clearances. (open during cooling operation only) NOTE - For installation on combustible floors, the furnace shall not be installed directly on carpeting, tile, or other Heating Unit Installed Upstream of Cooling Unit combustible material other than wood flooring. For installation in a residential garage, the furnace must Gas Unit be installed so that the burner(s) and the ignition source are located no less than 18 inches (457 mm) above the Evaporator floor. The furnace must be located or protected to avoid physical damage by vehicles. When a furnace is installed Figure 3 in a public garage, hangar, or other building that has a NOTE - This furnace is designed for a minimum contin- hazardous atmosphere, the furnace must be installed ac- uous return air temperature of 60Â°F (16Â°C) or an inter- cording to recommended good practice requirements and mittent operation down to 55Â°F (13Â°C) dry bulb for cases current National Fuel Gas Code or CSA B149 standards. where a night setback thermostat is used. Return air tem- NOTE - Furnace must be adjusted to obtain a temperature perature must not exceed 85Â°F (29Â°C) dry bulb. rise within the range specified on the unit nameplate. Fail- The EL297UHV furnace may be installed in alcoves, clos- ure to do so may cause erratic limit operation and prema- ets, attics, basements, garages, crawl spaces and utility ture heat exchanger failure. rooms in the upflow or horizontal position. This furnace This EL297UHV furnace must be installed so that its elec- design has not been CSA certified for installation in mobile trical components are protected from water. Installed in homes, recreational vehicles, or outdoors. Combination with a Cooling Coil When this furnace is Use of Furnace as Construction Heater used with cooling coils (Figure 3), it shall be installed in parallel with, or on the upstream side of, cooling coils to Units may be used for heating of buildings or structures avoid condensation in the heating compartment. With a under construction, if the following conditions are met to ensure proper operation: parallel flow arrangement, a damper (or other means to control the flow of air) must adequately prevent chilled ai DO NOT USE THE UNIT FOR CONSTRUCTION HEAT UNLESS ALL OF THE FOLLOWING CRITERIA ARE from entering the furnace. If the damper is manually op- MET: erated, it must be equipped to prevent operation of either â€¢ Furnace must be in its final location. The vent system the heating or the cooling unit, unless it is in the full HEAT must be permanently installed per these installation in- or COOL setting. structions. When installed, this furnace must be electrically grounded â€¢ Furnace must be installed as a two pipe system and according to local codes. In addition, in the United States, one hundred percent (100%) outdoor air must be pro- installation must conform with the current National Elec- vided for combustion air requirements during construc- tric Code, ANSI/NFPA No. 70. The National Electric Code tion. (ANSI/NFPA No. 70) is available from the following ad- â€¢ A room thermostat must control the furnace. The use dress: of fixed jumpers that will provide continuous heating is National Fire Protection Association prohibited. 1 Battery March Park â€¢ The input rate and temperature rise must be set per the Quincy, MA 02269 furnace rating plate. In Canada, all electrical wiring and grounding for the unit â€¢ Supply and Return air ducts must be provided and must be installed according to the current regulations of sealed to the furnace. Return air must be terminated the Canadian Electrical Code Part I (CSA Standard C22.1) outside of the space where furnace is installed. and/or local codes. â€¢ Return air temperature range between 60Â°F (16Â°C) and 80Â°F (27Â°C) must be maintained. â€¢ MERV 11 or greater air filters must be installed in the system and must be regularly inspected and maintained (e.g., regular static checks and replaced at end of life) during construction. Page 4 â€¢ Blower and vestibule access panels must be in place on the furnace at all times. WARNING â€¢ The furnace heat exchanger, components, duct system, Insufficient combustion air can cause headaches, and evaporator coils must be thoroughly cleaned follow- nausea, dizziness or asphyxiation. It will also cause ing final construction cleanâˆ’up. excess water in the heat exchanger resulting in rusting â€¢ Air filters must be replaced upon construction comple- and premature heat exchanger failure. Excessive tion. exposure to contaminated combustion air will result â€¢ All furnace operating conditions (including ignition, in- in safety and performance related problems. Avoid put rate, temperature rise and venting) must be verified exposure to the following substances in the combustion in accordance with these installation instructions. air supply: EQUIPMENT MAY EXPERIENCE PREMATURE COM- Permanent wave solutions PONENT FAILURE AS A RESULT OF FAILURE TO FOL- Chlorinated waxes and cleaners LOW THE ABOVE INSTALLATION INSTRUCTIONS. Chlorine base swimming pool chemicals FAILURE TO FOLLOW THE ABOVE INSTALLATION IN- Water softening chemicals STRUCTIONS VOIDS THE MANUFACTURERâ€™S EQUIP- MENT LIMITED WARRANTY. LENNOX DISCLAIMS De-icing salts or chemicals ALL LIABILITY IN CONNECTION WITH INSTALLERâ€™S Carbon tetrachloride FAILURE TO FOLLOW THE ABOVE INSTALLATION IN- Halogen type refrigerants STRUCTIONS. Cleaning solvents (such as perchloroethylene) NOTWITHSTANDING THE FOREGOING, INSTALLER Printing inks, paint removers, varnishes, etc. IS RESPONSIBLE FOR CONFIRMING THAT THE USE OF CONSTRUCTION HEAT IS CONSISTENT WITH THE Hydrochloric acid POLICIES AND CODES OF ALL REGULATING ENTI- Cements and glues TIES. ALL SUCH POLICIES AND CODES MUST BE AD- Antistatic fabric softeners for clothes dryers HERED TO. Masonry acid washing materials General These instructions are intended as a general guide and do Combustion, Dilution & Ventilation Air not supersede local codes in any way. Consult authorities If the EL297UHV is installed as a Non-Direct Vent Fur- nace, follow the guidelines in this section. having jurisdiction before installation. NOTE - In Non-Direct Vent installations, combustion air is In addition to the requirements outlined previously, the fol- taken from indoors or ventilated attic or crawlspace and lowing general recommendations must be considered flue gases are discharged out-doors. when installing a EL297UHV furnace: In the past, there was no problem in bringing in sufficient â€¢ Place the furnace as close to the center of the air distri- outdoor air for combustion. Infiltration provided all the air bution system as possible. The furnace should also be located close to the vent termination point. that was needed. In todayâ€™s homes, tight construction practices make it necessary to bring in air from outside for â€¢ When the furnace is installed in non-direct vent applica- tions, do not install the furnace where drafts might blow combustion. Take into account that exhaust fans, appli- directly into it. This could cause improper combustion ance vents, chimneys, and fireplaces force additional air and unsafe operation. that could be used for combustion out of the house. â€¢ When the furnace is installed in non-direct vent applica- Unless outside air is brought into the house for combus- tions, do not block the furnace combustion air opening tion, negative pressure (outside pressure is greater than with clothing, boxes, doors, etc. Air is needed for proper combustion and safe unit operation. inside pressure) will build to the point that a downdraft can occur in the furnace vent pipe or chimney. As a result, â€¢ When the furnace is installed in an attic or other insulat- ed space, keep insulation away from the furnace. combustion gases enter the living space creating a poten- tially dangerous situation. â€¢ When the furnace is installed in an unconditioned space, consider provisions required to prevent freezing In the absence of local codes concerning air for combus- of condensate drain system. tion and ventilation, use the guidelines and procedures in â€¢ Please consult the manufacturer of your evaporator this section to install EL297UHV furnaces to ensure effi- coil for their recommendations on distance required cient and safe operation. You must consider combustion between the heat exchanger and their drain pan. Ad- air needs and requirements for exhaust vents and gas equate space must be provided between the drain pan piping. A portion of this information has been reprinted and the furnace heat exchange. with permission from the National Fuel Gas Code (ANSI. CAUTION Z223.1/NFPA 54). This reprinted material is not the com- plete and official position of the ANSI on the referenced EL297UHV unit should not be installed in areas normally subject, which is represented only by the standard in its subject to freezing temperatures. entirety. In Canada, refer to the CSA B149 installation codes. Page 5 When the furnace is installed so that supply ducts carry CAUTION air circulated by the furnace to areas outside the space Do not install the furnace in a corrosive or contaminated containing the furnace, the return air must be handled by ducts which are sealed to the furnace casing and which atmosphere. Meet all combustion and ventilation air terminate outside the space containing the furnace.This requirements, as well as all local codes. is especially important when the furnace is mounted on a platform in a confined space such as a closet or small All gas-fired appliances require air for the combustion equipment room. process. If sufficient combustion air is not available, the furnace or other appliance will operate inefficiently and Even a small leak around the base of the unit at the plat- unsafely. Enough air must be provided to meet the needs form or at the return air duct connection can cause a po- of all fuel-burning appliances and appliances such as ex- tentially dangerous negative pressure condition. Air for haust fans which force air out of the house. When fireplac- combustion and ventilation can be brought into the con- es, exhaust fans, or clothes dryers are used at the same fined space either from inside the building or from outside. time as the furnace, much more air is required to ensure Air from Inside proper combustion and to prevent a downdraft. Insuffi- cient air causes incomplete combustion which can result If the confined space that houses the furnace adjoins a in carbon monoxide. space categorized as unconfined, air can be brought in by providing two permanent openings between the two spac- In addition to providing combustion air, fresh outdoor air es. Each opening must have a minimum free area of 1 dilutes contaminants in the indoor air. These contaminants square inch (645 mm2) per 1,000 Btu (.29 kW) per hour of may include bleaches, adhesives, detergents, solvents total input rating of all gas-fired equipment in the confined and other contaminants which can corrode furnace com- space. Each opening must be at least 100 square inches ponents. (64516 mm2). One opening shall be within 12 inches (305 The requirements for providing air for combustion and mm) of the top of the enclosure and one opening within 12 ventilation depend largely on whether the furnace is in- inches (305 mm) of the bottom. See Figure 4. stalled in an unconfined or a confined space. Unconfined Space EQUIPMENT IN CONFINED SPACE - ALL AIR FROM INSIDE An unconfined space is an area such as a basement or large equipment room with a volume greater than 50 cubic feet (1.42 m3) per 1,000 Btu (.29 kW) per hour of the com- ROOF TERMINATED bined input rating of all appliances installed in that space. EXHAUST PIPE This space also includes adjacent rooms which are not separated by a door. Though an area may appear to be unconfined, it might be necessary to bring in outdoor air for combustion if the structure does not provide enough air by infiltration. If the furnace is located in a building of tight OPENINGS (To Adjacent construction with weather stripping and caulking around SIDE WALL Unconfined TERMINATED Space) the windows and doors, follow the procedures in the Air EXHAUST PIPE (ALTERNATE from Outside section LOCATION) Confined Space A confined space is an area with a volume less than 50 NOTE - Each opening shall have a free area of at least one square inch cubic feet (1.42 m3) per 1,000 Btu (.29 kW) per hour of per 1,000 Btu (645mm2 per .29kW) per hour of the total input rating of the combined input rating of all appliances installed in that all equipment in the enclosure, but not less than 100 square inches space. This definition includes furnace closets or small (64516mm.2). equipment rooms. Figure 4 Page 6 Air from Outside EQUIPMENT IN CONFINED SPACE If air from outside is brought in for combustion and ventila- (Inlet Air from Ventilated Crawlspace and Outlet Air to Outside) tion, the confined space shall be provided with two perma- nent openings. One opening shall be within 12â€ (305mm) Roof Terminated of the top of the enclosure and one within 12â€ (305mm) of Exhaust Pipe the bottom. These openings must communicate directly or by ducts with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors or indirectly through vertical ducts. Each opening shall have a minimum free area of 1 square inch per 4,000 Btu (645mm2 per 1.17kW) Inlet Air per hour of total input rating of all equipment in the en- (Minimum Ventilation 12 in.(305mm) closure. When communicating with the outdoors through Louvers Furnace Above crawl horizontal ducts, each opening shall have a minimum free (Crawl space) space floor) area of 1 square inch per 2,000 Btu (645mm2 per .59kW) per total input rating of all equipment in the enclosure (See Figure 5). It is also permissible to bring in air for combus- tion from a ventilated attic (figure 6) or ventilated crawl space (Figure 7). Coupling or 3 in. to 2 in. *Intake Debris Screen Provided) Transition EQUIPMENT IN CONFINED SPACE - ALL AIR FROM OUTSIDE (Field Provided) (Inlet Air from Crawl Space and Outlet Air to Outside) NOTE-The inlet and outlet air openings shall each have a free area VENTILATION LOUVERS of at least one square inch per 4,000 Btu (645mm2 (Each end of attic) per 1.17kW) per ROOF TERMINATED hour of the total input rating of all equipment in the enclosure. EXHAUST PIPE Figure 7 OUTLET AIR If air from outside is brought in for combustion and ventila- tion, the confined space must have two permanent open- ings. One opening shall be within 12 inches (305 mm) of SIDE WALL FURNACE TERMINATED VENTILATION the top of the enclosure and one opening within 12 inches EXHAUST PIPE LOUVERS (305 mm) of the bottom. These openings must communi- (ALTERNATE INLET (For unheated LOCATION) AIR crawl space) cate directly or by ducts with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors or in- directly through vertical ducts. Each opening shall have a minimum free area of 1 square inch (645 mm2) per 4,000 NOTE-The inlet and outlet air openings shall each have a free area Btu (1.17 kW) per hour of total input rating of all equipment of at least one square inch per 4,000 Btu (645mm2 per 1.17kW) per in the enclosure. See Figure 5 and Figure 8. When com- hour of the total input rating of all equipment in the enclosure. municating with the outdoors through horizontal ducts, Figure 5 each opening shall have a minimum free area of 1 square inch (645 mm2) per 2,000 Btu (.56 kW) per total input rat- EQUIPMENT IN CONFINED SPACE ing of all equipment in the enclosure. See Figure 9. (Inlet Air from Ventilated Attic and Outlet Air to Outside) When ducts are used, they shall be of the same cross-sec- tional area as the free area of the openings to which they Ventilation Louvers connect. The minimum dimension of rectangular air ducts Roof Terminated Inlet Air shall be no less than 3 inches (75 mm). In calculating free Exhaust Pipe (Minimum 12 in.(305mm) Above area, the blocking effect of louvers, grilles, or screens attic floor) must be considered. If the design and free area of protec- tive covering is not known for calculating the size opening required, it may be assumed that wood louvers will have *Intake Debris 20 to 25 percent free area and metal louvers and grilles Screen (Provided) will have 60 to 75 percent free area. Louvers and grilles must be fixed in the open position or interlocked with the Furnace equipment so that they are opened automatically during equipment operation. NOTE-The inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 Btu (645mm2 per 1.17kW) per hour of the total input rating of all equipment in the enclosure. Figure 6 Page 7 The bolt and washer must be removed before the furnace EQUIPMENT IN CONFINED SPACE - ALL AIR FROM OUTSIDE (All Air Through Ventilated Attic) is placed into operation. After the bolt and washer have been removed, the rigid leg will not touch the blower hous- ing. ROOF TERMINATED VENTILATION LOUVERS EXHAUST PIPE (Each end of attic) UNITS WITH 1/2 HP OUTLET BLOWER MOTOR AIR RIGID LEG SIDE WALL FURNACE INLET AIR remove shipping bolt and washer (Ends 12â€ above TERMINATED bottom) EXHAUST PIPE (ALTERNATE LOCATION) NOTE-The inlet and outlet air openings shall each have a free area of Figure 10 at least one square inch per 4,000 Btu (645mm2 per 1.17kW) per hour of the total input rating of all equipment in the enclosure. Installation - Setting Equipment Figure 8 EQUIPMENT IN CONFINED SPACE - WARNING ALL AIR FROM OUTSIDE Do not connect the return air duct to the back of the furnace. Doing so will adversely affect the operation of ROOF TERMINATED the safety control devices, which could result in personal EXHAUST PIPE injury or death. OUTLET AIR WARNING Blower access panel must be securely in place when blower and burners are operating. Gas fumes, which SIDE WALL FURNACE could contain carbon monoxide, can be drawn into living TERMINATED EXHAUST PIPE space resulting in personal injury or death. (ALTERNATE INLET AIR LOCATION) Upflow Applications The EL297UHV gas furnace can be installed as shipped NOTE-Each air duct opening shall have a free area of at least one square inch per 2,000 Btu (645mm2 per .59kW) per hour of the total in the upflow position. Refer to Figure 12 for clearances. input rating of all equipment in the enclosure. If the equipment room Select a location that allows for the required clearances that are listed on the unit nameplate. Also consider gas cate directly with the outdoors, each opening shall have a free area of at least 1 square inch per 4,000 Btu (645mm2 per 1.17kW) per supply connections, electrical supply, vent connection, hour of the total input rating of all other equipment in the enclosure. condensate trap and drain connections, and installation and service clearances [24 inches (610 mm) at unit front]. Figure 9 The unit must be level from side to side. The unit may be positioned from level to Â½â€ toward the front. See Shipping Bolt Removal Figure 11. Units with 1/2 hp blower motor are equipped with three Allow for clearances to combustible materials as indicated flexible legs and one rigid leg. The rigid leg is equipped on the unit nameplate. with a shipping bolt and a flat white plastic washer (rather than the rubber mounting grommet used with a flexible mounting leg). See Figure 10. Page 8 SETTING EQUIPMENT UPFLOW APPLICATION Place level on blower Place level on the front blower deck screws to check deck to check side to side forward tilt UNIT FRONT AIR FLOW 1/2â€ max. SIDE VIEW HORIZONTAL APPLICATION UNIT FRONT AIR FLOW 1/2â€ max. END VIEW FRONT VIEW Unit must be level side-to-side. Unit may be positioned from level to 1/2â€ toward the front to aid in draining. Figure 11 Page 9 Return Air Guidelines WARNING Return air can be brought in through the bottom or either Improper installation of the furnace can result in side of the furnace installed in an upflow application. If the personal injury or death. Combustion and flue products furnace is installed on a platform with bottom return, make must never be allowed to enter the return air system an airtight seal between the bottom of the furnace and the or air in the living space. Use sheet metal screws and platform to ensure that the furnace operates properly and joint tape to seal return air system to furnace. In platform safely. The furnace is equipped with a removable bottom panel to facilitate installation. installations with furnace return, the furnace should be sealed airtight to the return air plenum. A door must Markings are provided on both sides of the furnace cab- never be used as a portion of the return air duct system. inet for installations that require side return air. Cut the The base must provide a stable support and an airtight furnace cabinet at the maximum dimensions shown on page 2. seal to the furnace. Allow absolutely no sagging, cracks, gaps, etc. Refer to Engineering Handbook for additional information. For no reason should return and supply air duct systems EL297UHV applications which include side return air ever be connected to or from other heating devices and a condensate trap installed on the same side of such as a fireplace or stove, etc. Fire, explosion, carbon the cabinet (trap can be installed remotely within 5 ft.) require either a return air base or field-fabricated monoxide poisoning, personal injury and/or property transition to accommodate an optional IAQ accessory damage could result. taller than 14.5â€. See Figure 13. Installation Clearances Side Return Air Top (with transition and filter) 20â€ X 25â€ X 1â€ Left Side Right Side (508mmX635mmX25mm) Air Filter Bottom (Floor) Return Top/Plenum 1 in. (25 mm) Air *Front 0 Plenum Back 0 Sides 0â€ Transition Vent 0 Floor 0â€¡ Figure 13 *Front clearance in alcove installation must be 24 in. (610 mm). Maintain a minimum of 24 in. (610 mm) for front service access. â€ Allow proper clearances to accommodate condensate trap. â€¡For installations on a combustible floor, do not install the furnace directly on carpeting, tile or other combustible materials other than wood flooring. Figure 12 Page 10 Optional Return Air Base CONDENSATE (Upflow Applications Only) TRAP FURNACE FRONT 1 23 (584) IF BASE 3âˆ’1/4 Overall IS USED (83) (Maximum) 1 Minimum WITHOUT 11 (279) IAQ CABINET, INDOOR AIR 2 Maximum 1 22âˆ’7/16 A SINGLE 1 Unit side return air 14 (356) QUALITY RETURN AIR Opening (570) CABINET PLENUM Overall AIR FLOW (PCO, Filter MUST (Maximum) Cabinet, etc.) COVER BOTH UNIT AND SIDE RETURN RETURN 7âˆ’1/4 5âˆ’5/8 AIR BASE (184) (143) AIR OPENINGS OPENINGS (Either Side) 23 (584) 3/4 OPTIONAL 17âˆ’1/2 (446) B Width (50W98) RETURN 26âˆ’7/8 (19) 21 (533) C Width (50W99) AIR BASE (683) 24âˆ’1/2 (622) D Width (51W00) SIDE VIEW FRONT VIEW NOTE- Optional side return air filter kits are not for use with return air base. 1Both the unit return air opening and the base return air opening must be covered by a single plenum or IAQ cabinet. Minimum unit side return air opening dimensions for units requiring 1800 cfm or more of air (W x H): 23 x 11 in. (584 x 279 mm). The opening can be cut as needed to accommodate plenum or IAQ cabinet while maintaining dimensions shown. Side return air openings must be cut in the field. There are cutting guides stenciled on the cabinet for the side return air opening. The size of the opening must not extend beyond the markings on the furnace cabinet. 2To minimize pressure drop, the largest opening height possible (up to 14 inches) is preferred. Figure 14 Removing the Bottom Panel Removing the Bottom Panel Remove the two screws that secure the bottom cap to the furnace. Pivot the bottom cap down to release the bottom panel. Once the bottom panel has been removed, reinstall the bottom cap. See Figure 15. Horizontal Applications WARNING Do not install the furnace on its front or back. See Figure 16. See figure 4. Screw Bottom Cap Bottom Panel Figure 15 Front Back Figure 16 Page 11 The EL297UHV furnace can be installed in horizontal ap- plications with either right- or left-hand air discharge. Re- HORIZONTAL SUSPENSION KIT fer to Figure 17 for clearances in horizontal applications. Internal Brace Metal Strap (provided with kit) Horizontal Application (typical) Installation Clearances Right-Hand Discharge Bracket (typical) Left End Right End AIR FLOW Air Air Air Flow Flow Flow Bottom (Floor)** Left-Hand Discharge Top Left End Right End Figure 18 NOTE - When the furnace is installed on a platform or with AIR FLOW the horizontal suspension kit in a crawlspace, it must be elevated enough to avoid water damage, accommodate drain trap and to allow the evaporator coil to drain. Bottom (Floor)** Platform Installation of Horizontal Unit Top 0 1 - Select location for unit keeping in mind service and other necessary clearances. See Figure 17. Front* 0 2 - Construct a raised wooden frame and cover frame Back 0 with a plywood sheet. If unit is installed above Ends 0 finished space, install an an auxiliary drain pan Vent 0 under unit. Set unit in drain pan as shown in Figure 19. Leave 8 inches for service clearance below unit Floor 0â€¡ for condensate trap. *Front clearance in alcove installation must be 24 in. (610 mm). 3 - Provide a service platform in front of unit. When Maintain a minimum of 24 in. (610 mm) for front service access. **An 8â€ service clearance must be maintained below the unit to installing the unit in a crawl space, a proper support provide for servicing of the condensate trap. platform may be created using cement blocks. â€¡For installations on a combustible floor, do not install the furnace directly on carpeting, tile or other combustible materials other 4 - Route auxiliary drain line so that water draining from than wood flooring. this outlet will be easily noticed by the homeowner. 5 - If necessary, run the condensate line into a Figure 17 condensate pump to meet drain line slope Suspended Installation of Horizontal Unit requirements. The pump must be rated for use This furnace may be installed in either an attic or a crawl- with condensing furnaces. Protect the condensate space. Either suspend the furnace from roof rafters or discharge line from the pump to the outside to avoid floor joists, as shown in Figure 18, or install the furnace freezing. on a platform, as shown in Figure 19. A horizontal sus- 6 - Continue with exhaust, condensate and intake pension kit (51W10) may be ordered from Lennox or use piping installation according to instructions. equivalent. NOTE - Heavy-gauge sheet metal straps may be used to suspend the unit from roof rafters or ceiling joists. When straps are used to suspend the unit in this way, support must be provided for both the ends. The straps must not interfere with the plenum or exhaust piping installation. Cooling coils and supply and return air plenums must be supported separately. Page 12 Duct System INTAKE PIPE *GAS CONNECTION Use industry-approved standards to size and install the EXHAUST PIPE supply and return air duct system. Refer to ACCA Manual D. This will result in a quiet and low-static system that has *Gas connector may be uniform air distribution. See below for proper duct instal- used for Canadian lation. able by local authority having jurisdiction. SUPPLY AIR Install self tapping screws to seal any potential air leaks SUPPLY RAISED AIR SERVICE PLATFORM PLATFORM Figure 19 HORIZONTAL UNIT UPFLOW UNIT Return Air -- Horizontal Applications Return air may be brought in only through the end of a furnace installed in the horizontal position. The furnace is NOTE - This furnace is not certified for operation in heat- equipped with a removable bottom panel to facilitate in- ing mode (indoor blower operating at selected heating stallation. See Figure 15. speed) with an external static pressure which exceeds 0.8 Filters inches w.c. Operation at these conditions may result in improper limit operation. This unit is not equipped with a filter or rack. A field-pro- vided high velocity rated filter is required for the unit to Supply Air Plenum operate properly. TABLE 1 lists recommended filter sizes. If the furnace is installed without a cooling coil, a remov- A filter must be in place whenever the unit is operating. able access panel should be installed in the supply air IMPORTANT duct. The access panel should be large enough to per- mit inspection of the heat exchanger. The furnace access If a highefficiency filter is being installed as part of this panel must always be in place when the furnace is oper- system to ensure better indoor air quality, the filter must ating and it must not allow leaks. In horizontal units, in- be properly sized. Highefficiency filters have a higher stall self tapping screws in the three evaporator coil screw static pressure drop than standardefficiency glass/foam holes made for upflow applications to seal the top cap to the vestibule panel. filters. If the pressure drop is too great, system capacity and performance may be reduced. Return Air Plenum The pressure drop may also cause the limit to trip more NOTE - Return air must not be drawn from a room frequently during the winter and the indoor coil to freeze where this furnace, or any other gas-fueled appliance in the summer, resulting in an increase in the number of (i.e., water heater), or carbon monoxide-producing de- service calls. vice (i.e., wood fireplace) is installed. Before using any filter with this system, check the When return air is drawn from a room, a negative pressure specifications provided by the filter manufacturer against is created in the room. If a gas appliance is operating in the data given in the appropriate Lennox Product a room with negative pressure, the flue products can be Specifications bulletin. Additional information is provided pulled back down the vent pipe and into the room. This in Service and Application Note ACC002 reverse flow of the flue gas may result in incomplete com- bustion and the formation of carbon monoxide gas. This (August 2000). raw gas or toxic fumes might then be distributed through- out the house by the furnace duct system. TABLE 1 Return air can be brought in through the bottom or either Furnace Filter Size side of the furnace (return air brought into either side of Cabinet Width Side Return Bottom Return furnace allowed only in upflow applications). If a furnace 17-1/2â€ 16 X 25 X 1 (1) 16 X 25 X 1 (1) with bottom return air is installed on a platform, make an airtight seal between the bottom of the furnace and the 21â€ 16 X 25 X 1 (1) 20 X 25 X 1 (1) platform to ensure that the unit operates properly and 24-1/2â€ 16 X 25 X 1 (2) 24 X 25 X 1 (1) safely. Use fiberglass sealing strips, caulking, or equiva- lent sealing method between the plenum and the furnace cabinet to ensure a tight seal. If a filter is installed, size the return air duct to fit the filter frame. Page 13 Pipe & Fittings Specifications CAUTION All pipe, fittings, primer and solvent cement must conform Solvent cements for plastic pipe are flammable liquids with American National Standard Institute and the Ameri- and should be kept away from all sources of ignition. can Society for Testing and Materials (ANSI/ASTM) stan- dards. The solvent shall be free flowing and contain no Do not use excessive amounts of solvent cement when lumps, undissolved particles or any foreign matter that ad- making joints. Good ventilation should be maintained to versely affects the joint strength or chemical resistance of reduce fire hazard and to minimize breathing of solvent the cement. The cement shall show no gelation, stratifica- vapors. Avoid contact of cement with skin and eyes. tion, or separation that cannot be removed by stirring. Re- fer to the TABLE 2 below for approved piping and fittings.. IMPORTANT TABLE 2 EL297UHV exhaust and intake connections are made PIPING AND FITTINGS SPECIFICATIONS of PVC. Use PVC primer and solvent cement when Schedule 40 PVC (Pipe) D1785 using PVC vent pipe. When using ABS vent pipe, use transitional solvent cement to make connections to the Schedule 40 PVC (Fittings) D2466 PVC fittings in the unit. Schedule 40 CPVC (Pipe) F441 Schedule 40 CPVC (Fittings) F438 Use PVC primer and solvent cement or ABS solvent ce- SDR-21 PVC or SDR-26 PVC (Pipe) D2241 ment meeting ASTM specifications, refer to Table 2. As an alternate, use all purpose cement, to bond ABS, PVC, or SDR-21 CPVC or SDR-26 CPVC (Pipe) F442 CPVC pipe when using fittings and pipe made of the same Schedule 40 ABS (Pipe) D1527 materials. Use transition solvent cement when bonding Schedule 40 ABS (Fittings) D2468 ABS to either PVC or CPVC. ABS-DWV (Drain Waste & Vent) (Pipe & Low temperature solvent cement is recommended during D2661 cooler weather. Metal or plastic strapping may be used for Fittings) vent pipe hangers. Uniformly apply a liberal coat of PVC PVC-DWV (Drain Waste & Vent) Pipe & D2665 primer for PVC or use a clean dry cloth for ABS to clean Fittings) inside socket surface of fitting and male end of pipe to ASTM depth of fitting socket. PRIMER & SOLVENT CEMENT SPECIFICATION Canadian Applications Only - Pipe, fittings, primer and PVC & CPVC Primer F656 solvent cement used to vent (exhaust) this appliance must PVC Solvent Cement D2564 be certified to ULC S636 and supplied by a single manu- CPVC Solvent Cement F493 facturer as part of an approved vent (exhaust) system. In addition, the first three feet of vent pipe from the furnace ABS Solvent Cement D2235 flue collar must be accessible for inspection. PVC/CPVC/ABS All Purpose Cement D2564, D2235, For Fittings & Pipe of the same material F493 ABS to PVC or CPVC Transition Solvent D3188 Cement CANADA PIPE & FITTING & SOLVENT MARKING CEMENT PVC & CPVC Pipe and Fittings PVC & CPVC Solvent Cement ABS to PVC or CPVC Transition Cement ULCS636 POLYPROPYLENE VENTING SYSTEM PolyProÂ® by Duravent InnoFlueÂ® by Centrotherm UL 1738 CERTIFIED GAS VENTING SYSTEM IPEX System1738 Schedule 40 PVC Pipes and Fittings UL1738 IPEX System1738 PVC FGV Cement & Primer Page 14 TABLE 3 OUTDOOR TERMINATION USAGE* STANDARD CONCENTRIC Flush Mount Wall Kit 1-1.2 inch 2 inch 3 inch Vent Pipe Dia. Kit 2 inch 3 inch Input Size Field in. 51W11 (US) Fabricated 71M80 (US) 69M29 (US) 60L46 (US) 51W12 22G44 (US) 44J40 (US) 444W92 (CA) 444W92 (CA) 444W93 (CA) 430G28 (CA) 481J20 (CA) (CA) 61-1/2 3YES YES 1YES 5YES 2YES 2 3YES YES 1YES 5YES 2YES 045 2-1/2 3YES YES 1YES 5YES 2YES 3 3YES YES 1YES 5YES 2YES 61-1/2 3YES YES 1YES 5YES 2YES 2 3YES YES 1YES 5YES 2YES 070 2-1/2 3YES YES 1YES 5YES 2YES 3 3YES YES 1YES 5YES 2YES 2 3YES YES 5YES YES YES 090 2-1/2 3YES YES 5YES YES YES 3 3YES YES 5YES YES YES 2 YES YES 5YES YES YES 110 2-1/2 YES YES 5YES YES YES 3 YES YES 5YES YES YES 135 3 YES YES 5YES YES NOTE - Standard Terminations do not include any vent pipe or elbows external to the structure. Any vent pipe or elbows external to the structure must be included in total vent length calculations. See vent length tables. * Kits must be properly installed according to kit instructions. 1 Requires field-provided outdoor 1-1/2â€ exhaust accelerator. 2 Concentric kits 71M80 and 44W92 include 1-1/2â€ outdoor accelerator, when used with 045 and 070 input models. 1-1/2 in. pipe must be transitioned to 2 in. when used with a concentric kit, 3 Flush mount kits 51W11 and 51W12 includes 1-1/2 in. outdoor exhaust accelerator, required when used with 045, 070 and 090 input models. 1-1/2 in. pipe must be transitioned to 2 in. pipe when used with the flushmount kit. 4 Termination kits 30G28, 44W92, 44W93 and 81J20 are certified to ULC S636 for use in Canada only. 5 See table 8 for vent accelerator requirements. 6 2 in. pipe to 1-1/2 in. reducer required and must be field provided. 4 - Test fit joint and mark depth of fitting on outside of Joint Cementing Procedure pipe. All cementing of joints should be done according to the 5 - Uniformly apply a liberal coat of PVC primer for specifications outlined in ASTM D 2855. PVC or use a clean dry cloth for ABS to clean inside DANGER socket surface of fitting and male end of pipe to depth of fitting socket. DANGER OF EXPLOSION! NOTE - Time is critical at this stage. Do not allow Fumes from PVC glue may ignite during system check. primer to dry before applying cement. Allow fumes to dissipate for at least 5 minutes before 6 - Promptly apply solvent cement to end of pipe and placing unit into operation.. inside socket surface of fitting. Cement should be applied lightly but uniformly to inside of socket. Take 1 - Measure and cut vent pipe to desired length. care to keep excess cement out of socket. Apply second coat to end of pipe. 2 - Debur and chamfer end of pipe, removing any ridges or rough edges. If end is not chamfered, 7 - Immediately after applying last coat of cement to edge of pipe may remove cement from fitting socket pipe, and while both inside socket surface and end and result in a leaking joint. of pipe are wet with cement, forcefully insert end of pipe into socket until it bottoms out. Turn PVC pipe NOTE - Check the inside of vent pipe thoroughly for 1/4 turn during assembly (but not after pipe is fully any obstruction that may alter furnace operation. inserted) to distribute cement evenly. DO NOT turn 3 - Clean and dry surfaces to be joined. ABS or cellular core pipe. Page 15 NOTE - Assembly should be completed within 20 Conduct the following test while each appliance is oper- seconds after last application of cement. Hammer ating and the other appliances (which are not operating) blows should not be used when inserting pipe. remain connected to the common venting system. If the 8 - After assembly, wipe excess cement from pipe at venting system has been installed improperly, you must end of fitting socket. A properly made joint will show correct the system as indicated in the general venting re- a bead around its entire perimeter. Any gaps may quirements section. indicate an improper assembly due to insufficient solvent. WARNING 9 - Handle joints carefully until completely set. CARBON MONOXIDE POISONING HAZARD Venting Practices Failure to follow the steps outlined below for each appliance connected to the venting system being placed Piping Suspension Guidelines into operation could result in carbon monoxide poisoning or death. SCHEDULE 40 The following steps shall be followed for each appliance PVC - 5' connected to the venting system being placed into all other pipe* - 3' operation, while all other appliances connected to the venting system are not in operation: 1 - Seal any unused openings in the common venting * See Piping and Fittings Specifications table system. NOTE - Isolate piping at the point where it exits the outside wall or 2 - Inspect the venting system for proper size and roof in order to prevent transmission of vibration to the structure. horizontal pitch. Determine that there is no blockage, restriction, leakage, corrosion, or other deficiencies Wall Thickness Guidelines which could cause an unsafe condition. 24â€ maximum 3 - Close all building doors and windows and all 3/4â€ minimum doors between the space in which the appliances remaining connected to the common venting system inside Wall outside are located and other spaces of the building. Turn on clothes dryers and any appliances not connected to the common venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers. 4 - Follow the lighting instructions. Turn on the appliance that is being inspected. Adjust the thermostat so that the appliance operates continuously. Figure 20 5 - After the main burner has operated for 5 minutes, test for leaks of flue gases at the draft hood relief 1 - In areas where piping penetrates joists or interior opening. Use the flame of a match or candle. walls, hole must be large enough to allow clearance on all sides of pipe through center of hole using a 6 - After determining that each appliance connected hanger. to the common venting system is venting properly, (step 3 return all doors, widows, exhaust fans, 2 - When furnace is installed in a residence where unit fireplace dampers, and any other gas-burning is shut down for an extended period of time, such appliances to their previous mode of operation. as a vacation home, make provisions for draining condensate collection trap and lines. 7 - If a venting problem is found during any of the preceding tests, the common venting system must Removal of the Furnace from Common Vent be modified to correct the problem. In the event that an existing furnace is removed from a Resize the common venting system to the minimum venting system commonly run with separate gas applianc- vent pipe size determined by using the appropriate ta- es, the venting system is likely to be too large to properly bles in Appendix G. (These are in the current standards vent the remaining attached appliances. Page 16 The EL297UHV can be installed as either a Non-Direct REPLACING FURNACE THAT WAS PART OF A COMMON VENT SYSTEM Vent or a Direct Vent gas central furnace. NOTE - In Non-Direct Vent installations, combustion air is CHIMNEY taken from indoors or ventilated attic or crawlspace and OR GAS VENT flue gases are discharged outdoors. In Direct Vent instal- (Check sizing for water lations, combustion air is taken from outdoors and flue heater only) gases are discharged outdoors. Intake and exhaust pipe sizing -- Size pipe according to WATER TABLE 4 (minimum) and TABLE 5 (maximum). Count all FURNACE HEATER elbows inside and outside the home. (Replaced) Regardless of the diameter of pipe used, the standard roof OPENINGS and wall terminations described in section Exhaust Piping (To Adjacent Terminations should be used. Exhaust vent termination Room) pipe is sized to optimize the velocity of the exhaust gas as it exits the termination. Refer to TABLE 8. In some appli- cations which permit the use of several different sizes of vent pipe, a combination vent pipe may be used. Contact Lennoxâ€™ Application Department for assistance in sizing If replacing a furnace which was vent pipe in these applications. commonly vented with another gas appliance, the size of the existing vent pipe for that gas appliance must be NOTE - The exhaust collar on all models is sized to ac- checked. Without the heat of the original furnace flue commodate 2â€ Schedule 40 vent pipe. In horizontal ap- products, the existing vent pipe is probably oversized for plications, any transition to exhaust pipe larger than 2â€ the single water heater or other appliance. The vent must be made in vertical runs of the pipe. Therefore a 2â€ should be checked for proper draw with the remaining elbow must be added before the pipe is transitioned to appliance. any size larger than 2â€. This elbow must be added to the elbow count used to determine acceptable vent lengths. Figure 21 Contact the Application Department for more information Exhaust Piping (Figure 22, Figure 24 and Figure 25) concerning sizing of vent systems which include multiple pipe sizes. Route piping to outside of structure. Continue with instal- lation following instructions given in piping termination Horizontal Installation Offset Requirements section. Exhaust Pipe CAUTION 12â€ Max. 12â€ Min. Horizontal Do not discharge exhaust into an existing stack or Gas Furnace stack that also serves another gas appliance. If vertical discharge through an existing unused stack is required, insert PVC pipe inside the stack until the end is even with the top or outlet end of the metal stack. NOTE - CAUTION ward unit. A minimum of 1/4â€ (6mm) drop for each 12â€ (305mm) of horizontal run is mandatory for drainage. The exhaust vent pipe operates under positive pressure NOTE - Exhaust pipe MUST be glued to furnace exhaust fitting, and must be completely sealed to prevent leakage of unless the optional glueless vent adapter kit 17H92 is used.. NOTE - Exhaust piping should be checked carefully to make combustion products into the living space. sure there are no sags or low spots. Figure 22 Vent Piping Guidlines NOTE - Lennox has approved the use of DuraVentÂ® and TABLE 4 Centrotherm manufactured vent pipe and terminations MINIMUM VENT PIPE LENGTHS as an option to PVC. When using the PolyProÂ® by Du- raVent or InnoFlueÂ® by Centrotherm venting system the EL297UHV MODEL MIN. VENT LENGTH* vent pipe requirements stated in the unit installation in- 15 ft. or 5 ft plus 2 elbows or 045, 070, 090, 110, 135 struction â€“ minimum & maximum vent lengths, termination 10 ft plus 1 elbow clearances, etc. â€“ apply and must be followed. Follow the *Any approved termination may be added to the minimum length list- instructions provided with PoyPro by DuraVent and Inno- ed. Two 45 degree elbows are the equivalent to one 90 degree elbow. Flue by Centrotherm venting system for assembly or if re- NOTE - Lennox offers a glueless vent adapter kit 17H92 quirements are more restrictive. The PolyPro by Duravent as an option for exhaust exiting at the furnace top cap cou- and InnoFlue by Centrotherm venting system must also pling. If the kit is not used, then the exhaust pipe MUST be follow the uninsulated glued to the furnace exhaust fitting. Page 17 Piping Size Process IMPORTANT Do not use screens or perforated metal in exhaust or intake terminations. Doing so will cause freeze-ups and What is the 1 furnace capacity? may block the terminations. Which style termination 2 being used? Standard or concentric? . Which needs 3 most elbows? Intake or exhaust? How many elbows? 4 Count all elbows inside and outside house. 5 Desired pipe size? What is the altitude of 6 the furnace installation? See max and min length 7 tables. Include all vent pipe and elbows inside and outside the hpouse Figure 23 Page 18 TABLE 5 Maximum Allowable Intake or Exhaust Vent Length in Feet NOTE - Size intake and exhaust pipe length separately. Values in table are for Intake OR Exhaust, not combined total. Both Intake and Exhaust must be same pipe size. Standard Termination at Elevation 0 - 4500 ft No Of 1-1/2â€ Pipe 2â€ Pipe 2-1/2â€ Pipe 3â€ Pipe 90Â° Model Model Model Model Elbows 045 070 090 110 135 045 070 090 110 135 045 070 090 110 135 045 070 090 110 135 Used 1 25 20 81 66 44 24 115 115 93 58 138 137 118 118 114 2 20 15 76 61 39 19 110 110 88 53 133 132 113 113 109 3 15 10 71 56 34 14 105 105 83 48 128 127 108 108 104 4 10 66 51 29 100 100 78 43 123 122 103 103 99 5 61 46 24 95 95 73 38 118 117 98 98 94 n/a n/a n/a n/a n/a 6 56 41 19 90 90 68 33 113 112 93 93 89 7 n/a 51 36 14 n/a 85 85 63 28 108 107 88 88 84 n/a 8 46 31 80 80 58 23 103 102 83 83 79 9 41 26 n/a 75 75 53 18 98 97 78 78 74 10 36 21 70 70 48 13 93 92 73 73 69 Standard Termination Elevation 4500 - 10,000 ft No Of 1-1/2â€ Pipe 2â€ Pipe 2-1/2â€ Pipe 3â€ Pipe 90Â° Model Model Model Model Elbows 045 070 090 110 135 045 070 090 110 135 045 070 090 110 135 045 070 090 110 135 Usedl 1 25 20 81 66 44 115 115 93 58 138 137 118 118 114 2 20 15 76 61 39 110 110 88 53 133 132 113 113 109 3 15 10 71 56 34 105 105 83 48 128 127 108 108 104 4 10 66 51 29 100 100 78 43 123 122 103 103 99 5 61 46 24 95 96 73 38 118 117 98 98 94 n/a n/a n/a n/a n/a n/a 6 56 41 19 90 90 68 33 113 112 93 93 89 7 n/a 51 36 14 85 85 63 28 108 107 88 88 84 n/a 8 46 31 80 80 58 23 103 102 83 83 79 9 41 26 n/a 75 75 53 18 98 97 78 78 74 10 36 21 70 70 48 13 93 92 73 73 69 See concentric terminations next page. Page 19 TABLE 5 Continued Maximum Allowable Intake or Exhaust Vent Length in Feet NOTE - Size intake and exhaust pipe length separately. Values in table are for Intake OR Exhaust, not combined total. Both Intake and Exhaust must be same pipe size. Concentric Termination at Elevation 0 - 4500 ft No Of 1-1/2â€ Pipe 2â€ Pipe 2-1/2â€ Pipe 3â€ Pipe 90Â° Model Model Model Model Elbows 045 070 090 110 135 045 070 090 110 135 045 070 090 110 135 045 070 090 110 135 Used 1 20 15 73 58 42 22 105 105 89 54 121 121 114 114 105 2 15 10 68 53 37 17 100 100 84 49 116 116 109 109 100 3 10 63 48 32 12 95 95 79 44 111 111 104 104 95 4 58 43 27 90 90 74 39 106 106 99 99 90 5 53 38 22 85 85 69 34 101 101 94 94 85 n/a n/a n/a n/a n/a 6 48 33 17 80 80 64 29 96 96 89 89 80 n/a 7 n/a 43 28 12 n/a 75 75 59 24 91 91 84 84 75 8 38 23 70 70 54 19 86 86 79 79 70 9 33 18 n/a 65 65 49 14 81 81 74 74 65 10 28 13 60 60 44 n/a 76 76 69 69 60 Concentric Termination Elevation 4500 - 10,000 ft No Of 1-1/2â€ Pipe 2â€ Pipe 2-1/2â€ Pipe 3â€ Pipe 90Â° Model Model Model Model Elbows 045 070 090 110 135 045 070 090 110 135 045 070 090 110 135 045 070 090 110 135 Used 1 20 15 73 58 42 105 105 89 54 121 121 114 114 105 2 15 10 68 53 37 100 100 84 49 116 116 109 109 100 3 10 63 48 32 95 95 79 44 111 111 104 104 95 4 58 43 27 90 90 74 39 106 106 99 99 90 5 53 38 22 85 85 69 34 101 101 94 94 85 n/a n/a n/a n/a n/a n/a 6 48 33 17 80 80 64 29 96 96 89 89 80 n/a 7 n/a 43 28 12 75 75 59 24 91 91 84 84 75 8 38 23 70 70 54 19 86 86 79 79 70 9 33 18 n/a 65 65 49 14 81 81 74 74 65 10 28 13 60 60 44 n/a 76 76 69 69 60 Page 20 TABLE 6 Maximum Allowable Exhaust Vent Lengths With Furnace Installed in a Closet or Basement Using Ventilated Attic or Crawl Space For Intake Air in Feet NOTE - Size intake and exhaust pipe length separately. Values in table are for Intake OR Exhaust, not combined total. Both Intake and Exhaust must be same pipe size. NOTE - Additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length calculation Standard Termination at Elevation 0 - 4500 ft No Of 1-1/2â€ Pipe 2â€ Pipe 2-1/2â€ Pipe 3â€ Pipe 90Â° Model Model Model Model Elbows 045 070 090 110 135 045 070 090 110 135 045 070 090 110 135 045 070 090 110 135 Used 1 20 15 71 56 34 14 100 100 78 43 118 117 98 98 94 2 15 10 66 51 29 9 95 95 73 38 113 112 93 93 89 3 10 61 46 24 4 90 90 68 33 108 107 88 88 84 4 56 41 19 85 85 63 28 103 102 83 83 79 5 51 36 14 80 80 58 23 98 97 78 78 74 n/a n/a n/a n/a n/a 6 46 31 9 75 75 53 18 93 92 73 73 69 n/a 7 n/a 41 26 4 n/a 70 70 48 13 88 87 68 68 64 8 36 21 65 65 43 8 83 82 63 63 59 9 31 16 n/a 60 60 38 3 78 77 58 58 54 10 26 11 55 55 33 n/a 73 72 53 53 49 Standard Termination Elevation 4500 - 10,000 ft No Of 1-1/2â€ Pipe 2â€ Pipe 2-1/2â€ Pipe 3â€ Pipe 90Â° Model Model Model Model Elbows 045 070 090 110 135 045 070 090 110 135 045 070 090 110 135 045 070 090 110 135 Usedl 1 20 15 71 56 34 100 100 78 43 118 117 98 98 94 2 15 10 66 51 29 95 95 73 38 113 112 93 93 89 3 10 61 46 24 90 90 68 33 108 107 88 88 84 4 56 41 19 85 85 63 28 103 102 83 83 79 5 51 36 14 80 80 58 23 98 97 78 78 74 n/a n/a n/a n/a n/a n/a 6 46 31 9 75 75 53 18 93 92 73 73 69 n/a 7 n/a 41 26 4 70 70 48 13 88 87 68 68 64 8 36 21 65 65 43 8 83 82 63 63 59 9 31 16 n/a 60 60 38 3 78 77 58 58 54 10 26 11 55 55 33 n/a 73 72 53 53 49 Page 21 TYPICAL EXHAUST AND INTAKE PIPE CONNECTIONS IN UPFLOW DIRECT OR NON-DIRECT VENT APPLICATIONS 2â€ EXHAUST INTAKE EXHAUST INTAKE 2â€ 2â€ 2â€ or 2â€ 2â€ 3â€ 3â€ 045/070 Only 1âˆ’1/2â€ TRANSITION Exhaust 2â€ 6â€ Min DO NOT transition Exhaust from larger to smaller DO NOT transition pipe in horizontal runs from smaller to larger of exhaust pipe. pipe in horizontal runs Exhaust of exhaust pipe. * When transitioning up in pipe size, use the shortest length of 2â€ PVC pipe possible. NOTE âˆ’ Exhaust pipe and intake pipe must be the same diameter. Figure 24 TYPICAL EXHAUST AND INTAKE PIPE CONNECTIONS IN HORIZONTAL DIRECT OR NON-DIRECT VENT APPLICATIONS (RIGHT HAND DISCHARGE SHOWN) 45Â° 45Â° 12â€ max. MAX MAX 2â€ Exhaust EXHAUST or 2â€ 2â€ 2â€ 2â€ 2â€ DO NOT transition or 2â€ from smaller to larger SIDE VIEW 2â€ pipe in horizontal runs of exhaust pipe. 2â€ INTAKE 2â€ Exhaust 3â€ *2â€ EXHAUST 3â€ 045/070 Only *2â€ DO NOT transition from larger to smaller 1âˆ’1/2â€ pipe in horizontal runs TRANSITION *2â€ of exhaust pipe. *2â€ INTAKE *2â€ *2â€ Exhaust * When transitioning up in pipe size, use the shortest length of 2â€ PVC pipe possible. NOTE âˆ’ Exhaust pipe and intake pipe must be the same diameter. Figure 25 Page 22 Intake Piping TYPICAL AIR INTAKE PIPE CONNECTIONS The EL297UHV furnace may be installed in either direct HORIZONTAL NONâˆ’DIRECT VENT APPLICATIONS vent or non-direct vent applications. In non-direct vent (Horizontal Rightâˆ’Hand Air Discharge Application Shown) applications, when intake air will be drawn into the furnace from the surrounding space, the indoor air quality must be considered and guidelines listed in Combustion, Dilution and Ventilation Air section must be followed. PVC pipe Follow the next two steps when installing the unit in Direct coupling Vent applications, where combustion air is taken from outdoors and flue gases are discharged outdoors. The provided air intake screen must not be used in direct vent applications (outdoors). Min 2â€ 1 - Use transition solvent cement or a sheet metal screw OR to secure the intake pipe to the inlet air connector. 2 - Route piping to outside of structure. Continue with installation following instructions given in general INTAKE guidelines for piping terminations and intake and DEBRIS exhaust piping terminations for direct vent sections. SCREEN (Provided) Refer to TABLE 5 for pipe sizes. NOTE - Debris screen may be positioned straight out (preferred) or with an elbow rotated to face down. TYPICAL AIR INTAKE PIPE CONNECTIONS UPFLOW NONâˆ’DIRECT VENT APPLICATIONS Figure 27 Follow the next two steps when installing the unit in Non- INTAKE DEBRIS Direct Vent applications where combustion air is taken SCREEN from indoors or ventilated attic or crawlspace and flue (Provided) gases are discharged outdoors. Min 2â€ 1 - Use field-provided materials and the factory- provided air intake screen to route the intake piping as shown in Figure 26 or Figure 27. Maintain a minimum clearance of 3â€ (76mm) around the air intake opening. The air intake opening (with the protective screen) should always be directed forward or to either side in the upflow position, and either straight out or downward in the horizontal position. The air intake piping must not terminate too close to the flooring or a platform. Ensure that the intake air inlet will not be obstructed by loose insulation or other items that may clog the debris screen. 2 - If intake air is drawn from a ventilated attic (Figure NOTE - Debris screen and elbow may be rotated, so that 28) or ventilated crawlspace (Figure 29) the exhaust screen may be positioned to face forward or to either side. vent length must not exceed those listed in table 6. If 3â€ diameter pipe is used, reduce to 2â€ diameter pipe at the termination point to accommodate the debris screen. Figure 26 3 - Use a sheet metal screw to secure the intake pipe to the connector, if desired. Page 23 General Guidelines for Vent Terminations CAUTION In Non-Direct Vent applications, combustion air is taken If this unit is being installed in an application with from indoors or ventilated attic or crawlspace and the flue combustion air coming in from a space serviced by an gases are discharged to the outdoors. The EL297UHV is exhaust fan, power exhaust fan, or other device which then classified as a non-direct vent, Category IV gas fur- may create a negative pressure in the space, take care nace. when sizing the inlet air opening. The inlet air opening In Direct Vent applications, combustion air is taken from must be sized to accommodate the maximum volume outdoors and the flue gases are discharged to the out- of exhausted air as well as the maximum volume of doors. The EL297UHV is then classified as a direct vent, combustion air required forall gas appliances serviced Category IV gas furnace. by this space. In both Non-Direct Vent and Direct Vent applications, the vent termination is limited by local building codes. In the absence of local codes, refer to the current National Fuel EQUIPMENT IN CONFINED SPACE (Inlet Air from Ventilated Attic and Outlet Air to Outside) Gas Code ANSI Z223-1/NFPA 54 in U.S.A., and current CSA-B149 Natural Gas and Propane Installation Codes in Ventilation Louvers Canada for details. Roof Terminated Inlet Air Position termination according to location given in Figure Exhaust Pipe (Minimum 12 in.(305mm) Above 31 or Figure 32. In addition, position termination so it is attic floor) free from any obstructions and 12â€ above the average snow accumulation. At vent termination, care must be taken to maintain protec- *Intake Debris Screen tive coatings over building materials (prolonged exposure (Provided) to exhaust condensate can destroy protective coatings). It is recommended that the exhaust outlet not be located Furnace within 6 feet (1.8m) of an outdoor AC unit because the condensate can damage the painted coating. NOTE - See TABLE 7 for maximum allowed exhaust pipe length without insulation in unconditioned space during NOTE-The inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 Btu (645mm2 per 1.17kW) per winter design temperatures below 32Â°F (0Â°C). If required hour of the total input rating of all equipment in the enclosure. exhaust pipe should be insulated with 1/2â€ (13mm) Ar- maflex or equivalent. In extreme cold climate areas, 3/4â€ Figure 28 (19mm) Armaflex or equivalent may be necessary. Insu- lation must be protected from deterioration. Armaflex with EQUIPMENT IN CONFINED SPACE UV protection is permissable. Basements or other en- (Inlet Air from Ventilated Crawlspace and Outlet Air to Outside) closed areas that are not exposed to the outdoor ambient temperature and are above 32 degrees F (0Â°C) are to be considered conditioned spaces. Roof Terminated Exhaust Pipe IMPORTANT Do not use screens or perforated metal in exhaust or intake terminations. Doing so will cause freeze-ups and Inlet Air may block the terminations. (Minimum Ventilation 12 in.(305mm) Louvers Furnace Above crawl (Crawl space) space floor) IMPORTANT For Canadian Installations Only: In accordance to CSA International B149 installation codes, the minimum allowed distance between the Coupling or combustion air intake inlet and the exhaust outlet of other 3 in. to 2 in. *Intake Debris Screen Provided) appliances shall not be less than 12 inches (305mm). Transition (Field Provided) NOTE-The inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 Btu (645mm2 per 1.17kW) per hour of the total input rating of all equipment in the enclosure. Figure 29 Page 24 TABLE 7 Maximum Allowable Exhaust Vent Pipe Length (in ft.3) Without Insulation In Unconditioned Space For Winter Design Temperatures Two - Stage High Efficiency Furnace Winter Design Unit Input Size Vent Pipe Temperatures1 Â°F Diameter 045 070 090 110 135 (Â°C) PVC 2PP PVC 2PP PVC 2PP PVC 2PP PVC 2PP 1-1/2 22 n/a 25 n/a n/a n/a n/a n/a n/a n/a 32 to 21 2 in 21 18 33 30 46 42 30 30 n/a n/a (0 to -6) 2-1/2 in 16 n/a 26 n/a 37 n/a 36 n/a n/a n/a 3 in 12 12 21 21 30 30 29 29 42 42 1-1/2 12 n/a 20 n/a n/a n/a n/a n/a n/a n/a 20 to 1 2 in 11 9 19 17 28 25 27 24 n/a n/a (-7 to -17) 2-1/2 in 7 n/a 14 n/a 21 n/a 20 n/a n/a n/a 3 in 2 2 9 9 16 16 14 14 23 23 1-1/2 8 n/a 13 n/a n/a n/a n/a n/a n/a n/a 0 to -20 2 in 6 4 12 10 19 16 18 15 n/a n/a (-18 to -29) 2-1/2 in 1 n/a 7 n/a 13 n/a 12 n/a n/a n/a 3 in 1 1 2 2 8 8 7 7 13 13 1Refer to 99% Minimum Design Temperature table provided in the current edition of the ASHRAE Fundamentals Handbook. 2 Poly-Propylene vent pipe (PP) by Duravent and Centrotherm. 3 Vent length in table is equivalent length. Consider each elbow as 5ft. of linear length NOTE - Concentric terminations are the equivalent of 5â€™ and should be considered when measuring pipe length. NOTE - Maximum unisulated vent lengths listed may include the termination(vent pipe exterior to the structure) and cannot exceed 5 linear feet or the maximum allowable intake or exhaust vent length listed in table 5 or 6 which ever is less. NOTE - If insulation is required in an unconditioned space, it must be located on the pipe closest to the furnace. See Figure 30. Conditioned Space Exhaust Pipe Pipe Insulation Intake Conditioned Pipe Space Unconditioned Space Figure 30 Page 25 VENT TERMINATION CLEARANCES FOR NON-DIRECT VENT INSTALLATIONS IN THE USA AND CANADA INSIDE CORNER DETAIL G H D A E B L C B B I Fixed Fixed Operable Closed M Closed F Operable B K J A B AREA WHERE TERMINAL VENT TERMINAL AIR SUPPLY INLET IS NOT PERMITTED US Installations1 Canadian Installations2 A = Clearance above grade, veranda, 12 inches (305mm) or 12 in. (305mm) 12 inches (305mm) or 12 in. (305mm) porch, deck or balcony above average snow accumulation. above average snow accumulation. B = Clearance to window or 6 inches (152mm) for appliances <10,000 door that may be opened 4 feet (1.2 m) below or to side of opening; Btuh (3kw), 12 inches (305mm) for 1 foot (30cm) above opening appliances > 10,000 Btuh (3kw) and <100,000 Btuh (30kw), 36 inches (.9m) for appliances > 100,000 Btuh (30kw) C = Clearance to permanently * 12â€ * 12â€ closed window D = Vertical clearance to ventilated soffit located above the terminal within a * Equal to or greater than soffit depth. * Equal to or greater than soffit depth. horizontal distance of 2 feet (610 mm) from the center line of the terminal E = Clearance to unventilated soffit * Equal to or greater than soffit depth. * Equal to or greater than soffit depth. F = Clearance to outside corner * No minimum to outside corner * No minimum to outside corner G = Clearance to inside corner * * H = * 3 feet (.9m) within a height 15 feet (4.5m) 3 feet (.9m) within a height 15 feet (4.5m) tended above meter / regulator assembly above the meter / regulator assembly above the meter / regulator assembly I = Clearance to service regulator * 3 feet (.9m) 3 feet (.9m) vent outlet J = Clearance to non-mechanical air 6 inches (152mm) for appliances <10,000 4 feet (1.2 m) below or to side of opening; Btuh (3kw), 12 inches (305mm) for 1 foot (30 cm) above opening appliances > 10,000 Btuh (3kw) and pliance <100,000 Btuh (30kw), 36 inches (.9m) for appliances > 100,000 Btuh (30kw) K = 3 feet (.9m) above if within 10 feet 6 feet (1.8m) ply inlet (3m) horizontally L = Clearance above paved sidewalk or 7 feet (2.1m)â€ 7 feet (2.1m)â€ paved driveway located on public property M = Clearance under veranda, porch, deck or balcony *12 inches (305mm)â€¡ 12 inches (305mm)â€¡ 1 In accordance with the current ANSI Z223.1/NFPA 54 Natural Fuel Gas Code 2 *For clearances not specified in ANSI Z223.1/NFPA 54 or CSA In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code B149.1, clearance will be in accordance with local installation â€ A vent shall not terminate directly above a sidewalk or paved driveway that is codes and the requirements of the located between two single family dwellings and serves both dwellings. lation instructions.â€ â€¡ Permitted only if veranda, porch, deck or balcony is fully open NOTE - This figure is intended to illustrate clearance on a minimum of two sides beneath the floor. Lennox recommends requirement and does not serve as a substitute for avoiding this location if possible. locally adopted installation codes. Figure 31 Page 26 VENT TERMINATION CLEARANCES FOR DIRECT VENT INSTALLATIONS IN THE US AND CANADA INSIDE CORNER DETAIL G H A D E B L C B B I Fixed Fixed Operable Closed M Closed F Operable B K J A B AREA WHERE TERMINAL VENT TERMINAL AIR SUPPLY INLET IS NOT PERMITTED US Installations1 Canadian Installations2 A = Clearance above grade, veranda, 12 inches (305mm) or 12 in. (305mm) 12 inches (305mm) or 12 in. (305mm) porch, deck or balcony above average snow accumulation. above average snow accumulation. B = Clearance to window or 6 inches (152mm) for appliances <10,000 6 inches (152mm) for appliances <10,000 door that may be opened Btuh (3kw), 12 inches (305mm) for pliances > 10,000 Btuh (3kw) and <50,000 appliances > 10,000 Btuh (3kw) and <100,000 Btuh (30kw), 36 inches (.9m) pliances > 50,000 Btuh (15kw) for appliances > 100,000 Btuh (30kw) C = Clearance to permanently * 12â€ * 12â€ closed window D = Vertical clearance to ventilated soffit located above the terminal within a * Equal to or greater than soffit depth * Equal to or greater than soffit depth horizontal distance of 2 feet (610mm) from the center line of the terminal E = Clearance to unventilated soffit * Equal to or greater than soffit depth* Equal to or greater than soffit depth F = Clearance to outside corner * No minimum to outside corner * No minimum to outside corner G = Clearance to inside corner * * H = 3 feet (.9m) within a height 15 feet (4.5m) 3 feet (.9m) within a height 15 feet (4.5m) tended above meter / regulator assembly above the meter / regulator assembly above the meter / regulator assembly I = Clearance to service regulator * 3 feet (.9m) 3 feet (.9m) vent outlet J = Clearance to non-mechanical air 6 inches (152mm) for appliances <10,000 6 inches (152mm) for appliances <10,000 Btuh (3kw), 12 inches (305mm) for pliances > 10,000 Btuh (3kw) and <50,000 appliances > 10,000 Btuh (3kw) and pliance <100,000 Btuh (30kw), 36 inches (.9m) pliances > 50,000 Btuh (15kw) for appliances > 100,000 Btuh (30kw) K = 3 feet (.9m) above if within 10 feet 6 feet (1.8m) ply inlet (3m) horizontally L = Clearance above paved sidewalk or 7 feet (2.1m)â€ * 7 feet (2.1m) paved driveway located on public property M = Clearance under veranda, porch, deck or balcony *12 inches (305mm)â€¡ 12 inches (305mm)â€¡ 1 In accordance with the current ANSI Z223.1/NFPA 54 Natural Fuel Gas Code *For clearances not specified in ANSI Z223.1/NFPA 54 or CSA 2 B149.1, clearance will be in accordance with local installation In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code codes and the requirements of the gas supplier and these â€ A vent shall not terminate directly above a sidewalk or paved driveway that is located installation instructions.â€ between two single family dwellings and serves both dwellings. NOTE - This figure is intended to illustrate clearance â€¡ Permitted only if veranda, porch, deck or balcony is fully open on a minimum of requirements and does not serve as a substitute for two sides beneath the floor. Lennox recommends avoiding this location if possible. locally adopted installation codes. Figure 32 Page 27 Details of Intake and Exhaust Piping Terminations for any direction. When exhaust and intake piping must be run up an outside wall, the exhaust piping Direct Vent Installations must be terminated with pipe sized per table 8.The NOTE - In Direct Vent installations, combustion air is taken intake piping may be equipped with a 90Â° elbow from outdoors and flue gases are discharged to outdoors. turndown. Using turndown will add 5 feet (1.5m) to the equivalent length of the pipe. NOTE - Flue gas may be slightly acidic and may adverse- ly affect some building materials. If any vent termination is used and the flue gasses may impinge on the building 3â€(76mm) MAX. Inches(mm) material, a corrosion-resistant shield (minimum 24 inches square) should be used to protect the wall surface. If the optional tee is used, the protective shield is recommend- UNCONDITIONED ATTIC SPACE ed. The shield should be constructed using wood, plastic, 8â€ (203mm) MIN sheet metal or other suitable material. All seams, joints, cracks, etc. in the affected area should be sealed using an 12â€ (305mm) ABOVE AVERAGE SNOW appropriate sealant. See Figure 41. ACCUMULATION Intake and exhaust pipes may be routed either horizontal- ly through an outside wall or vertically through the roof. In attic or closet installations, vertical termination through the 3â€ (76mm) OR roof is preferred. Figure 33 through Figure 40 show typical 2â€ (51mm) PVC terminations. 1 - Intake and exhaust terminations are not required PROVIDE SUPPORT FOR INTAKE AND to be in the same pressure zone. You may exit the EXHAUST LINES intake on one side of the structure and the exhaust DIRECT VENT ROOF TERMINATION KIT on another side (Figure 34). You may exit the (15F75 or 44J41) exhaust out the roof and the intake out the side of the structure (Figure 35). Figure 33 2 - Intake and exhaust pipes should be placed as close together as possible at termination end (refer to Exiting Exhaust and Intake Vent illustrations). Maximum separation is 3â€ (76MM) (different pressure zone) on roof terminations and 6â€ (152MM) on side wall terminations. NOTE - When venting in different pressure zones, the maximum separation requirement of intake and exhaust pipe DOES NOT apply. 3 - On roof terminations, the intake piping should terminate straight down using two 90Â° elbows (See Inlet Air Exhaust Furnace (Minimum 12 in. Figure 33). Pipe 305 MM) above 4 - Exhaust piping must terminate straight out or up as grade or snow accumulation shown. A reducer may be required on the exhaust piping at the point where it exits the structure to improve the velocity of exhaust away from the Figure 34 intake piping. See TABLE 8. Exiting Exhaust and Intake Vent NOTE - Care must be taken to avoid recirculation of (different pressure zone) exhaust back into intake pipe. 5 - On field-supplied terminations for side wall exit, exhaust piping may extend a maximum of 12 inches Roof Terminated (305MM) for 2â€ PVC and 20 inches (508MM) for 3â€ Exhaust Pipe (76MM) PVC beyond the outside wall. Intake piping should be as short as possible. See Figure 41. 6 - On field-supplied terminations, a minimum distance between the end of the exhaust pipe and the end of the intake pipe without a termination elbow is 8â€ and Inlet Air a minimum distance of 6â€ with a termination elbow. Furnace (Minimum 12 in. See Figure 41. 305 MM) above grade or snow 7 - If intake and exhaust piping must be run up a accumulation side wall to position above snow accumulation or other obstructions, piping must be supported. At Figure 35 least one bracket must be used within 6â€ from the top of the elbow and then every 24â€ (610mm) as shown in Figure 41, to prevent any movement in Page 28 TABLE 8 EXHAUST PIPE TERMINATION SIZE REDUCTION FIELD-PROVIDED Accelerator not required EL297UHV Termination REDUCER MAY BE REQUIRED TO ADAPT for 3â€ concentric MODEL Pipe Size DIFFERENT VENT PIPE SIZE TO TERMINATION OUTSIDE WALL INTAKE *045 and 070 1-1/2â€ (38MM) AIR EXHAUST EXHAUST *090 2â€ (51MM) AIR AIR 110 2â€ (51MM) 135 2â€ (51MM) INTAKE12â€ (305mm) Min. *EL297UHV-045, -070 and -090 units with the flush mount termination INTAKE CLAMP AIR above grade or must use the 1-1/2â€accelerator supplied with the kit. AIR (Not Furnished) average snow ac 8 - A multiple furnace installation may use a group cumulation. GRADE of up to four terminations assembled together DIRECT VENT CONCENTRIC WALL TERMINATION horizontally, as shown in Figure 39. 71M80, 69M29 or 60L46 (US) 44W92 or 44W93 (Canada) 2â€ EXTENSION FOR 2â€ PVC Figure 38 PIPE1â€ EXTENSION FOR 3â€ PVC PIPE FURNACE 4'' EXHAUST PIPE EXHAUST 12â€ (305mm) FURNACE VENT 5â€ 5-1/2â€ INTAKE (127mm) (140mm) PIPE INTAKE GLUE EXHAUST AIR END FLUSH INTO 18â€ MAX. Front View TERMINATION (457mm) EXHAUST VENT FLAT 12â€ (305mm) Min. SIDE 1-1/2â€ ACCELERATOR above grade or Inches (mm) INTAKE cumulation. FLUSH-MOUNT SIDE WALL TERMINATION KIT AIR 51W11 (US) or 51W12 (Canada) Figure 36 optional intake elbow Side View OPTIONAL VENT TERMINATION FOR MULTIPLE UNIT INSTALLATION OF DIRECT VENT WALL TERMINATION KIT (30G28 or 81J20) Accelerator not required for 3â€ concentric Figure 39 FLASHING 12â€ (305mm) INTAKE (Not Furnished) DIRECT VENT APPLICATION Minimum Above Average USING EXISTING CHIMNEY STRAIGHT-CUT OR Snow ANGLE-CUT IN DIRECTION Accumulation OF ROOF SLOPE * 3â€ - 8â€ 8â€ - 12â€ (76mm- SHEET METAL STRAP (203mm - 305mm) 203mm) (Clamp and sheet metal strap must be field installed to support the weight of the termination kit.) Minimum 12â€ (305MM) INTAKE PIPE SHOULDER OF FITTINGS CLAMP above chimney top INSULATION (optional) PROVIDE SUPPORT OF PIPE ON TOP PLATE FIELD-PROVIDED plate or average snow SHEET ALTERNATE METAL TOP REDUCER MAY BE REQUIRED accumulation PLATE INTAKE PIPE TO ADAPT DIFFERENT VENT PIPE SIZE TO TERMINATION 3â€ - 8â€ (76mm- DIRECT VENT CONCENTRIC ROOFTOP TERMINATION INSULATE 203mm) EXTERIOR 71M80, 69M29 or 60L46 (US) TO FORM PORTION OF 44W92 or 44W93 (Canada) SEAL CHIMNEY Figure 37 NOTE - Do tical discharge through an existing unused chimney or stack is required, insert piping inside trated. In any exterior portion of chimney, the exhaust vent must be insulated. Figure 40 Page 29 NOTE âˆ’ FIELDâˆ’PROVIDED FIELD FABRICATED WALL TERMINATION REDUCER MAY BE 2â€ (51mm) 3â€ (76mm) REQUIRED TO ADAPT LARGER VENT PIPE SIZE Vent Pipe Vent Pipe TO TERMINATION Aâˆ’ Minimum clearance above grade or average 12â€ (305 mm) 12â€ (305 mm) snow accumulation D D Bâˆ’ Maximum horizontal separation between 6â€ (152 mm) 6â€ (152 mm) intake and exhaust B B C1 -Minimum from end of C1 Intake exhaust to inlet of intake 8â€ (203 mm) 8â€ (203 mm) C2 Elbow C2 -Minimum from end of A STRAIGHT A exhaust to inlet of intake 6â€ (152 mm) 6â€ (152 mm) APPPLICATION Dâˆ’ Maximum exhaust * WALL pipe length 12â€ (305 mm) 20â€ (508 mm) SUPPORT D D Eâˆ’ Maximum wall support E E distance from top of each 6â€ (152 mm) 6â€ (152 mm) pipe (intake/exhaust) See maximum allowable venting tables for venting B B lengths with this arrangement. * Use wall support every 24â€ (610 mm). Use two wall supports if extension is greater than C1 A A 24â€ (610 mm) but less than 48â€ (1219 mm). C2 NOTE âˆ’ One wall support must be within 6â€ (152 mm) EXTENDED from top of each pipe (intake and exhaust) to prevent APPLICATION movement in any direction. ALTERNATE TERMINATIONS (TEE & FORTYâˆ’FIVE DEGREE ELBOWS ONLY) 2â€ (51mm) 3â€ (76mm) Vent Pipe Vent Pipe B A - Clearance above 12â€ (305 mm) Min12â€ (305 mm) Min B D Exhaust Grade or average snow D accumulation 1 B - Horizontal separation 6â€ (152mm)min 6â€ (152mm)min between intake and exhaust 24â€ (610mm )Max 24â€ (610mm )Max C 3 C - Minimum from end of 9â€ (227mm) 9â€ (227mm) C exhaust to inlet of intake Intake 2 Elbow A D - Exhaust pipe length 12â€ (305mm)min 12â€ (305mm)min A 16â€ (405mm )Max 16â€ (405mm )Max D E - Wall support distance from 6â€ (152mm) Max 6â€ (152mm) Max top of each pipe (intake/exhaust) 1 D E E D B 1 Front View of E B Intake and Exhaust 12â€ B C C 12â€ 2 Intake Exhaust A C A 2 A 1The exhaust termination tee should be connected to the 2â€ or 3â€ PVC flue pipe as shown in the illustration. In horizontal tee applications there must be be a minimum of 3 ft away from covered patios or any living ares and cannot be within 3 ft of a window. Do not use an accelerator in applications that include an exhaust termination tee. The accelerator is not required. 2 As required. Flue gas may be acidic and may adversely affect some building materials. If a side wall vent termination is used and flue gases will impinge on the building materials, a corrosionâˆ’resistant shield (24 inches square) should be used to protect the wall surface. If optional tee is used, the protective shield is recommended. The shield should be constructed using wood, sheet metal or other suitable material. All seams, joints, cracks, etc. in affected area, should be sealed using an appropriate sealant. 3 Exhaust pipe 45Â° elbow can be rotated to the side away from the combustion air inlet to direct exhaust away from adjacent property. The exhaust must never be directed toward the combustion air inlet. Figure 41 Page 30 Details of Exhaust Piping Terminations for Non-Direct Vent Applications NON-DIRECT VENT APPLICATION USING EXISTING CHIMNEY Exhaust pipes may be routed either horizontally through STRAIGHT-CUT OR an outside wall or vertically through the roof. In attic or ANGLE-CUT IN DIRECTION OF ROOF SLOPE closet installations, vertical termination through the roof is preferred. Figure 42 and Figure 43 show typical termi- nations. Minimum 12â€ (305MM) 1 - Exhaust piping must terminate straight out or up as above chimney top plate or average snow shown. The termination pipe must be sized as listed SHOULDER OF FITTINGS accumulation PROVIDE SUPPORT in TABLE 8.The specified pipe size ensures proper OF PIPE ON TOP PLATE SHEET velocity required to move the exhaust gases away METAL TOP PLATE from the building. 2 - On field supplied terminations for side wall exit, exhaust piping may extend a maximum of 12 inches INSULATE TO FORM EXTERIOR (305MM) for 2â€ PVC and 20 inches (508MM) for 3â€ SEAL PORTION OF CHIMNEY (76MM) PVC beyond the outside wall. 12â€ (305mm) NOTE - Do ABOVE AVE. tical discharge through an existing unused chimney or stack is required, insert piping SNOW inside ACCUMULATION trated. In any exterior portion of chimney, the exhaust vent must be insulated. Figure 43 3â€ (76mm) OR 2â€ (51mm) PVC UNCONDITIONED ATTIC SPACE Venting In A Crawl Space PROVIDE SUPPORT FOR EXHAUST LINES NON-DIRECT VENT ROOF TERMINATION KIT (15F75 or 44J41) Figure 42 3 - If exhaust piping must be run up a side wall to position above snow accumulation or other obstructions, piping must be supported every 24 inches (610MM). When exhaust piping must be run up an outside wall, any reduction in exhaust pipe Basement Floor size must be done after the final elbow. 4 - Distance between exhaust pipe terminations on multiple furnaces must meet local codes. KIT 51W18 Crawl Space and Extended Horizontal Venting (USA) KIT 15Z70 Lennox provides kit 51W18 (USA) and kit 15Z70 (Cana- (CANADA) da) to install 2â€ or 3â€ PVC exhaust piping through the floor joists and into the the crawl space. See Figure 44. This kit can also be used as a supplemental drain for in- stallations with condensate run back in the vent pipe (ie. long horizontal runs, unconditioned spaces, etc.). Figure 44 Page 31 Condensate Piping CONDENSATE TRAP AND PLUG LOCATIONS This unit is designed for either right- or left-side exit of (Unit shown in upflow position) condensate piping in upflow applications. In horizontal Trap applications, the condensate trap must extend below the (same on unit. An 8â€ service clearance is required for the conden- right side) sate trap. Refer to Figure 45 and Figure 47 for condensate 1-1/2 in. Rubber trap locations. Figure 53 shows trap assembly using 1/2â€ Grommet PVC or 3/4â€ PVC. NOTE - If necessary the condensate trap may be installed Plug up to 5â€™ away from the furnace. Use PVC pipe to connect (same on left side) trap to furnace condensate outlet. Piping from furnace must slope down a minimum of 1/4â€ per ft. toward trap. 1 - Determine which side condensate piping will exit the unit, location of trap, field-provided fittings and length of PVC pipe required to reach available drain. 2 - Use a large flat head screw driver or a 1/2â€ drive socket extension and remove plug (Figure 45) from the cold end header box at the appropriate location NOTE - In upflow applications where side return on the side of the unit. Install provided 3/4 NPT street elbow fitting into cold end header box. Use sate trap, filter rack must be installed beyond Teflon tape or appropriate pipe dope. condensate trap or trap must be re-located to NOTE - Cold end header box drain plugs are facto- avoid interference. ry installed. Check the unused plug for tightness to prevent leakage. 3 - Install the cap over the clean out opening at the base of the trap. Secure with clamp. See Figure 53. Figure 45 4 - Install drain trap using appropriate PVC fittings, NOTE - In horizontal applications it is recommended to glue all joints. Glue the provided drain trap as install a secondary drain pan underneath the unit and trap shown in Figure 53. Route the condensate line to assembly. an open drain. Condensate line must maintain a NOTE - Appropriately sized tubing and barbed fitting may 1/4â€ downward slope from the furnace to the drain. be used for condensate drain. Attach to the drain on the 5 - Figure 48 and Figure 49 show the furnace and trap using a hose clamp. See Figure 46. evaporator coil using a separate drain. If necessary the condensate line from the furnace and evaporator Field Provided Drain Components coil can drain together. See Figure 50, Figure 51 and Figure 52. Upflow furnace (Figure 51) - In upflow furnace applications the field provided vent must be a minimum 1â€ to a maximum 2â€ length above the condensate drain outlet connection. Any length above 2â€ may result in a flooded heat exchanger Elbow if the combined primary drain line were to become restricted. Horizontal furnace (Figure 52) - In horizontal furnace applications the field provided Barbed Fitting vent must be a minimum 4â€ to a maximum 5â€ length Tubing above the condensate drain outlet connection. Hose Clamp Any length above 5â€ may result in a flooded heat exchanger if the combined primary drain line were to become restricted. Figure 46 CAUTION Do not use copper tubing or existing copper condensate lines for drain line. Page 32 6 - If unit will be started immediately upon completion Condensate line must slope downward away from the trap of installation, prime trap per procedure outlined in to drain. If drain level is above condensate trap, conden- Unit Start-Up section. sate pump must be used. Condensate drain line should be routed within the conditioned space to avoid freezing of CONDENSATE TRAP LOCATIONS condensate and blockage of drain line. If this is not possi- (Unit shownin upflow position withremote trap) ble, a heat cable kit may be used on the condensate trap and line. Heating cable kit is available from Lennox in var- ious lengths; 6 ft. (1.8m) - kit no. 26K68; 24 ft. (7.3m) - kit FieldProvidedVent no. 26K69; and 50 ft. (15.2m) - kit no. 26K70. Min.1â€AboveCondensate DrainConnection Furnace With Evaporator 1â€Min. Coil Using A Separate Drain 2â€Max. *5â€™max. Evaporator drain PVCPipeOnly line required (Trap at coil is optional) Trap CanBeInstalleda Maximum 5â€™ From Furnace Field Provided Vent (1â€ min. 2â€ max. above condensate connection) To Drain Condensate DrainConnection *Piping from furnace must slope down a minimum 1/4â€ per ft. toward trap Figure 47 Figure 48 Furnace with Evaporator Coil Using a Separate Drain (Unit shown in horizontal left-hand discharge position) Field Provided Vent Evaporator (4â€ min. to 5â€ max. above Coil condensate connection) 4â€min 5â€max 5â€™max. PVCPipeOnly Condensate DrainConnection (Trap at coil is optional) DrainPan Piping from furnace and evaporator coil must slope down a minimum 1/4â€ per ft. toward trap . Figure 49 Page 33 IMPORTANT Furnace with Evaporator When combining the furnace and evaporator coil Coil Using a Common Drain drains together, the A/C condensate drain outlet must Evaporator drain be vented to relieve pressure in order for the furnace line required pressure switch to operate properly. (Trap at coil is optional) Condensate Trap With Optional Overflow Switch (1â€min.to2â€Max.above From Evaporator Coil condensatedrainconnection) HorizontalFurnace4â€Min.to5â€Max.above condensatedrainconnection) Condensate DrainConnection FurnaceCondensate DrainConnection Optional Figure 51 Figure 50 Furnace with Evaporator Coil Using a Common Drain (Unit shown in horizontal leftâˆ’hand discharge position) Evaporator (4â€min.to5â€Max.above Coil condensatedrainconnection) 4â€min 5â€max 5â€™ max. PVC Pipe Only CondensateDrain Connection (Trap at coil is optional) Drain Pan Piping from furnace and evaporator coil must slope down a minimum 1/4â€ per ft. toward trap Figure 52 Page 34 TRAP / DRAIN ASSEMBLY USING 1/2â€ PVC OR 3/4â€ PVC Optional Condensate Drain Connection Adapter 3/4 inch slip X 3/4 inch mpt (not furnished) 90Â° Street Elbow 3/4 inch PVC (not furnished) Adapter 3/4 inch slip X 3/4 inch mpt (not furnished) Condensate Drain 1(25 mm) Min. Connection In Unit Vent 2 (50 mm) Max. Condensate Drain AboveTop Of 5 Feet Connection In Unit Condensate Drain Maximum Connection In Unit 90Â° Street Elbow 3/4 inch PVC ( furnished) 90Â° Elbow 3/4 inch PVC (Not Furnished) To Trap 1/2 inch PVC Pipe 3/4 inch PVC Pipe OptionalDrainPipingFromTrap (Not Furnished) (Not Furnished) DrainAssembly for 1/2 inch Drain Pipe Coupling 3/4 inch slip X slip (Not Furnished) 1/2 inch PVC Pipe (Not Furnished) Drain Trap 90Â° Elbow Assembly 1/2 inch PVC (Furnished) To (Not Furnished) Drain DrainAssembly for 3/4 inch Drain Pipe Drain Trap Clean Out 90Â° Elbow 90Â° Elbow 3/4 inch PVC 3/4 inch PVC (Not Furnished) (Not Furnished) To To Coupling 3/4 inch slip X slip Drain Drain (Not Furnished) DrainTrap Assembly with 3/4 inch Piping DrainTrap Assembly with 1/2 inch Piping 1 (25 mm) Min. 2 (50 mm) Max. AboveTop 1 (25 mm) Min. 2 (50 mm) Max. AboveTop Of Condensate Drain Connection In Unit Of Condensate Drain Connection In Unit DrainTrapAssembly Vent Vent (Furnished) 3/4 inch 1/2 inch 7 Condensate Drain Condensate Drain (178) Connection In Unit Connection In Unit To To Drain Drain Figure 53 Page 35 6 - In some localities, codes may require installation of Gas Piping a manual main shut-off valve and union (furnished Gas supply piping should not allow more than 0.5â€W.C. by installer) external to the unit. Union must be of drop in pressure between gas meter and unit. Supply gas the ground joint type. pipe must not be smaller than unit gas connection. IMPORTANT CAUTION Compounds used on threaded joints of gas piping must If a flexible gas connector is required or allowed by the be resistant to the actions of liquified petroleum gases. authority that has jurisdiction, black iron pipe shall be installed at the gas valve and extend outside the furnace Leak Check cabinet. The flexible connector can then be added between the black iron pipe and the gas supply line. After gas piping is completed, carefully check all field-in- stalled piping connections for gas leaks. Use a commer- WARNING cially available leak detecting solution specifically manu- factured for leak detection. Never use an open flame to Do not over torque (800 in-lbs) or under torque (350 in- test for gas leaks. lbs) when attaching the gas piping to the gas valve. The furnace must be isolated from the gas supply sys- tem by closing the individual manual shut-off valve during 1 - Gas piping may be routed into the unit through either any gas supply system at pressures greater than or equal the left- or right-hand side. Supply piping enters into to Â½ psig. (3.48 kPa, 14 inches w.c.). This furnace and the gas valve from the side of the valve as shown its components are designed, manufactured and inde- in figure 55. Connect the gas supply piping into the pendently certified to comply with all applicable ANSI/CSA gas valve. The maximum torque is 800 in lbs and standards. A leak check of the furnace and its components minimum torque is 350 in lbs when when attaching is not required. the gas piping to the gas valve. 2 - When connecting gas supply, factors such as length MANUAL MAIN SHUT-OFF CAP of run, number of fittings and furnace rating must VALVE WILL NOT HOLD FURNACE be considered to avoid excessive pressure drop. NORMAL TEST PRESSURE TABLE 9 lists recommended pipe sizes for typical ISOLATE applications. 1/8â€ N.P.T. PLUGGED TAP GAS VALVE NOTE - Use two wrenches when connecting gas piping to avoid transferring torque to the manifold. 3 - Gas piping must not run in or through air ducts, clothes chutes, chimneys or gas vents, dumb waiters or elevator shafts. Center gas line through piping hole. Gas line should not touch side of unit. Figure 54 See Figure 55 and Figure 56. 4 - Piping should be sloped 1/4 inch per 15 feet (6mm IMPORTANT per 5.6m) upward toward the gas meter from the furnace. The piping must be supported at proper When testing pressure of gas lines, gas valve must be intervals, every 8 to 10 feet (2.44 to 3.05m), using disconnected and isolated. See Figure 54. Gas valves suitable hangers or straps. Install a drip leg in can be damaged if subjected to pressures greater than vertical pipe runs to serve as a trap for sediment or 1/2 psig (3.48 kPa). condensate. 5 - A 1/8â€ N.P.T. plugged tap or pressure post is located WARNING on the gas valve to facilitate test gauge connection. FIRE OR EXPLOSION HAZARD See Figure 66. Failure to follow the safety warnings exactly could result in serious injury, death, or property damage. Never use an open flame to test for gas leaks. Check all connections using a commercially available soap solution made specifically for leak detection. Some soaps used for leak detection are corrosive to certain metals. Carefully rinse piping thoroughly after leak test has been completed. Page 36 Upflow Application Upflow Application Left Side Piping Right Side Piping (Standard) 1/2â€ NPT (Alternate) MANUAL 1/2â€ NPT MAIN SHUT-OFF VALVE MANUAL MAIN SHUT-OFF VALVE GROUND GROUND JOINT JOINT UNION UNION DRIP LEG FIELD PROVIDED DRIP LEG AND INSTALLED NOTE - BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET Figure 55 Horizontal Applications Possible Gas Piping Configurations MANUAL MAIN SHUT-OFF Horizontal Application VALVE Left-Side Air Discharge MANUAL MAIN SHUT-OFF VALVE GROUND JOINT UNION GROUND JOINT DRIP LEG UNION DRIP LEG Horizontal Application Right-Side Air Discharge MANUAL MAIN SHUT-OFF VALVE GROUND JOINT FIELD UNION PROVIDED AND INSTALLED DRIP LEG NOTE - BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET Figure 56 Page 37 TABLE 9 Gas Pipe Capacity - ft3/hr (m3/hr) Nominal Internal Length of Pipe - feet (m) Iron Pipe Diameter 10 20 30 40 50 60 70 80 90 100 Size Inches inches (3.048) (6.096) (9,144) (12,192) (15.240) (18.288) (21.336) (24.384) (27.432) (30,480) (mm) (mm) 1/2 .622 172 118 95 81 72 65 60 56 52 50 (12.7) (17.799) (4.87) (3.34) (2.69) (2.29) (2.03) (1.84) (1.69) (1.58) (1.47) (1.42) 3/4 .824 360 247 199 170 151 137 126 117 110 104 (19.05) (20.930) (10.19) (7.000) (5.63) (4.81) (4.23) (3.87) (3.56) (3.31) (3.11) (2.94) 1 1.049 678 466 374 320 284 257 237 220 207 195 (25.4) (26.645) (19.19) (13.19) (10.59) (9.06) (8.04) (7.27) (6.71) (6.23) (5.86) (5.52) 1-1/4 1.380 1350 957 768 657 583 528 486 452 424 400 (31.75) (35.052) (38.22) (27.09) (22.25) (18.60) (16.50) (14.95) (13.76) (12.79) (12.00) (11.33) 1-1/2 1.610 2090 1430 1150 985 873 791 728 677 635 600 (38.1) (40.894) (59.18) (40.49) (32.56) (27.89) (24.72) (22.39) (20.61) (19.17) (17.98) (17.00) 2 2.067 4020 2760 2220 1900 1680 1520 1400 1300 1220 1160 (50.8) (52.502) (113.83) (78.15) (62.86) (53.80) (47.57) (43.04) (39.64) (36.81) (34.55) (32.844) 2-1/2 2.469 6400 4400 3530 3020 2680 2480 2230 2080 1950 1840 (63.5) (67.713) (181.22) (124.59) (99.95) (85.51) (75.88) (70.22) (63.14) (58.89) (55.22) (52.10) 3 3.068 11300 7780 6250 5350 4740 4290 3950 3670 3450 3260 (76.2) (77.927) (319.98) (220.30) (176.98) (151.49) (134.22) (121.47) (111.85) (103.92) (97.69) (92.31) NOTE - Capacity given in cubic feet (m3 ) of gas per hour and based on 0.60 specific gravity gas. Page 38 The power supply wiring must meet Class I restrictions. Electrical Protected by either a fuse or circuit breaker, select circuit protection and wire size according to unit nameplate. WARNING Electrostatic discharge can affect CAUTION electronic components. Take care Failure to use properly sized wiring and circuit breaker during unit installation and service to may result in property damage. Size wiring and circuit protect the unitâ€™s electronic controls. breaker(s) per Product Specifications bulletin (EHB) and ELECTROSTATIC Precautions will help to avoid control unit rating plate. DISCHARGE exposure to electrostatic discharge (ESD) by putting the unit, the control and the NOTE - Unit nameplate states maximum current draw. Precautions and technician at the same electrostatic Maximum over-current protection allowed is shown in TA- Procedures BLE 10. potential. Touch hand and all tools on an unpainted unit surface before TABLE 10 performing any service procedure to EL297UHV Maximum Over-Current neutralize electrostatic charge. 045V36B, 070V36B, WARNING 090V36C, 090V48C, 15 110V48C Electric Shock Hazard. Can cause injury or 090V60C, 110V60C, death. Unit must be properly grounded in 20 135V60D accordance with national and local codes. Holes are on both sides of the furnace cabinet to facilitate wiring. WARNING Install a separate (properly sized) disconnect switch near the furnace so that power can be turned off for servicing. Fire Hazard. Use of aluminum wire with this product may Before connecting the thermostat or the power wiring, result in a fire, causing property damage, severe injury check to make sure the wires will be long enough for ser- or death. Use copper wire only with this product. vicing at a later date. Remove the blower access panel to check the length of the wire. The unit is equipped with a field make-up box on the left Complete the wiring connections to the equipment. Use hand side of the cabinet. The make-up box may be moved the provided unit wiring diagram. See Figure 61 through to the right side of the furnace to facilitate installation. If Figure 64. Field wiring diagrams begin on page 44. Use the make-up box is moved to the right side, clip the wire 18-gauge wire or larger that is suitable for Class II rating ties that bundle the wires together. The excess wire must for thermostat connections. be pulled into the blower compartment. Secure the excess wire to the existing harness to protect it from damage. Electrically ground the unit according to local codes or, in the absence of local codes, according to the current Na- INTERIOR MAKE-UP BOX INSTALLATION tional Electric Code (ANSI/NFPA No. 70). A green ground wire is provided in the field make-up box. NOTE - The MAKE-UP EL297UHV furnace contains electronic components that BOX are polarity sensitive. Make sure that the furnace is wired correctly and is properly grounded. One line voltage â€œACCâ€ 1/4â€ spade terminal is provided on the furnace integrated control. Any electronic air cleaner or other accessory rated up to one amp can be connect- ed to this terminal with the neutral leg of the circuit being Right Side connected to the one of the provided neutral terminals. See Figure 65 for control configuration. This terminal is energized when the indoor blower is operating. Figure 57 Refer to Figure 61 for unit schematic and field wiring. See Figure 58 and Figure 59 for wiring in communicating ap- plications. TABLE 11 shows DIP switch and on-board link settings for non-communicating thermostat applications. Typical wiring schematic is shown in Figure 61, 61, 62 and 63. Page 39 An unpowered, normally open (dry) set of contacts with Indoor Blower Speeds a 1/4â€ spade terminal â€œHUMâ€ are provided for humidifier Non-Communicating connections and may be connected to 24V or 120V. Any humidifier rated up to one amp can be connected to these When the thermostat is set to â€œFAN ON,â€ the indoor blower terminals. In 120V humidifier applications the neutral leg of will run continuously at a field selectable percentage of the circuit can be connected to one of the provided neutral the second-stage cooling speed when there is no cooling terminals. This terminal is energized in the heating mode. or heating demand. The factory default setting is 38% of cool speed. When the EL297UHV is running in the heat- Install the room thermostat according to the instructions ing mode,the indoor blower will run on the heating speed provided with the thermostat. See TABLE 11 for field wir- designated by the positions of DIP switches 11, 12 and 13. ing connections in varying applications. If the furnace is When there is a cooling demand, the indoor blower will being matched with a heat pump, refer to the instruction run on the cooling speed designated by the positions of packaged with the dual fuel thermostat. DIP switches 5 and 6. First stage cooling will run at 70% Thermostat Selection cool speed. Communicating CAUTION NOTE - When the EL297UHV is used with a communicat- Field wiring for both communicating and non- ing thermostat, proper indoor blower speed selections are communicating applications is illustrated in diagrams, made by the thermostat. which begin on the next page. When the thermostat is set to â€œFAN ON,â€ the indoor blow- er will run at setting determined during system configura- Non-Communicating tion. See TABLE 24 on page 72 for allowable circulation In non-communicating applications the EL297UHV speeds. is designed to operate in a SINGLE-STAGE mode or When there is a heating demand the fan will run on heat- TWOSTAGE mode using a conventional thermostat. ing speeds for firing rate. When there is a cooling demand, For optimal performance in non-communicating applica- the fan will run on the first stage and second stage cool- tions, Lennox recommends use of a ComfortSenseÂ® 7000 ing speed set using the thermostat in the installer setup high quality electronic digital thermostat or any other with mode. The factory default is based upon 400 CFM a ton. adjustable settings for 1st stage / 2nd stage on / off differ- Generator Use - Voltage Requirements entials and adjustable stage timers. Communicating The following requirements must be kept in mind when specifying a generator for use with this equipment: In communicating applications a communicating thermo- stat must be used. Refer to the instructions provided with â€¢ The furnace requires 120 volts (Range: 102 volts to the thermostat for installation, set-up and operation. In 132 volts) communicating system all unused thermostat wire in the â€¢ The furnace operates at 60 Hz + 5% (Range: 57 Hz wire bundle needs to be terminated inside and out. The to 63 Hz) extra wires can terminate on the â€˜Câ€ terminal of the termi- â€¢ The furnace integrated control requires both correct nal strip. (RSBus). Using an additional wire come off â€Câ€ polarity and proper ground. Both polarity and proper terminal and wire nut all the extra wires together. Termina- grounding should be checked before attempting to tion on the outdoor control must match the indoor control. operate the furnace on either permanent or tempo- rary power â€¢ Generator should have a wave form distortion of less than 5% THD (total harmonic distortion) Page 40 Communicating and Non Communicating Wiring - Ignition Control 107045-XX Communicating Enabled Furnace and Non- Communicating Enabled Furnace and Communicating Outdoor Unit Communicating Enabled Outdoor Unit COMMUNICATING FURNACE COMMUNICATING FURNACE OPTIONAL DISCHARGE AIR SENSOR OPTIONAL DISCHARGE AIR SENSOR OPTIONAL OUTDOOR OPTIONAL COMMUNICATING AIR SENSOR OUTDOOR THERMOSTAT AIR SENSOR A2L COMMUNICATING THERMOSTAT A2L DOOR AIR CONDITIONING OR HEAT PUMP UNIT NON-COMMUNICATING OUTDOOR AIR CONDITIONING UNIT - 1 OR 2 STAGE CLIP ON-BOARD LINK W915 (Y1 TO Y2) FOR TWO-STAGE OPERATION nace/air handler control and four wires between the outdoor unit and the furnace/air handler control. When a thermostat cable with more than four wires is used, the extra wires must be properly connected to avoid electrical noise. The wires must not be left disconnected. Use wire nuts to bundle the four unused wires at each end of the cable. A single wire should then be connected to the indoor unit end of the wire bundle and attached to the â€œCâ€ terminals as shown below. Communicating Integrated Control Outdoor Unit Communicating Thermostat A2L Figure 58 Page 41 Communicating Wiring - Ignition Control 107045-XX Optional Accessories for use with Communicating System NOTE: COMMUNICATING THERMOSTAT SENSES HUMIDITY & CONTROLS HUM CONTACTS TO CYCLE HUMIDIFIER 120V CONNECTIONS BASED ON DEMAND. NO OTHER CONTROL OR HUMIDISTAT REQUIRED. â€œHUMâ€ CONTACT IS OPTIONAL OUTDOOR AIR SENSOR FOR USE WITH HUMIDIâˆ’ CLOSED ANYTIME FIER (IF NOT ALREADY IN THE SYSTEM FOR OTHER FUNCâˆ’ HUMIDITY DEMAND TIONS. BUILT INTO ALL COMMUNICATING ENABLED OUTâˆ’ IS PRESENT DOOR UNITS). COMMUNICATING ENABLED FURNACE 24V HUMIDIFIER CONNECTIONS for even heat) CS 7000 THERMOSTAT COMMUNICATING THERMOSTAT A2L CONVENTIONAL NONâˆ’COMMUNIâˆ’ CATING SYSTEM RSBus COMMUNICATING SYSTEM Maximum total length of all conâˆ’ nections on the RSBus is limited *24V IN jumper not used in nonâˆ’ to 1500ft. communicating configuration Wire gauge of *24V IN RSBus wire is 18. JUMPER H NOTE: 24V UV LIGHT COMMUNICATING APPLICATIONS ENABLED FURNACE In a communicating system, neither furnace nor air handler UV light applications. An additional transformer for UV light applications COMMUNICATING is required. THERMOSTAT HEPA BYPASS FILTER X2680 HEPA INTERLOCK KIT COMMUNICATING ENABLED FURNACE PASS INDOOR BLOWER MOTOR COMMON WIRE THROUGH CURRENT LOOP. SEE HEPA INTERLOCK KIT FOR INSTALLATION DEâˆ’ DEHUMIDIFIER TAILS CONTROL Rf CfHVAC LVCS VENTILATION CONTROL SYSTEM Gs GhEQUIP COMMUNICATING W ENABLED FURNACE SEE LVCS VENTILATION HVAC DH INSTRUCTIONS FOR DAMPER & SENSOR WIRING EQUIPMENT Figure 59 Page 42 Communicating Wiring - Ignition Control 107045-XX Optional Accessories For Use With Communicating System LENNOX COMMUNICATING INDOOR UNIT LENNOX COMMUNICATING THERMOSTAT OR DAMPER CONTROL MODULE A2L LENNOX COMMUNICATING CONVENTIONAL INDOOR UNIT OUTDOOR UNIT (1 OR 2 STAGE) FLOAT SWITCH LENNOX COMMUNICATING OUTDOOR UNIT LENNOX COMMUNICATING FURNACE EL296V, SL280V, SL280VN, SL297V, SLP99V S cutting DS to R will not cause communication interuption or error code DS CUT* Râˆ’DS W914 R NVENTIONAL TERMINAL CO Figure 60 FIGURE 2 Page 43 DIP Switch Settings and Field Wiring Ignition Control 107045-XX DIP Switch Settings and On-Board Links DIP Switch 1 On Board Links Must Be Cut To Select Thermostat Thermostat Wiring Connections System Options Heating Stages 1 Heat / 1 Cool ON S1 FURNACE OUTDOOR T'STAT TERM. STRIP UNIT NOTE - Use DIP switch 2 to set H second-stage heat ON delay. DO NOT CUT ANY OFF-7 minutes. ON-BOARD LINKS * ON-12 minutes. 1 Heat / 2 Cool ON S1 FURNACE OUTDOOR T'STAT TERM. STRIP UNIT NOTE - Use DIP switch 2 to set H second-stage heat ON delay. CUT ON-BOARD LINK OFF-7 minutes. W915 * ON-12 minutes. 2 STAGE COMPR 1 Heat / 2 Cool ON CUT ON-BOARD LINK S1 FURNACE OUTDOOR with t'stat with W915 T'STAT TERM. STRIP UNIT humidity control 2 STAGE COMPR H NOTE - Use DIP switch 2 to set second-stage * heat ON delay. OFF-7 minutes. CUT ON-BOARD LINK ON-12 minutes. W914 DEHUM OR HARMONY o * Not required on all units. Page 44 DIP Switch Settings and Field Wiring Ignition Control 107045-XX DIP Switch Settings and On-Board Links DIP Switch 1 On Board Links Must Be Cut To Select Thermostat Thermostat Wiring Connections System Options Heating Stages 2 Heat / 2 Cool OFF S1 FURNACE OUTDOOR T'STAT TERM. STRIP UNIT CUT ON-BOARD LINK W915 2 STAGE H COMPR * 2 Heat / 2 Cool OFF S1 FURNACE OUTDOOR with t'stat with CUT ON-BOARD LINK T'STAT TERM. STRIP UNIT humidity control W915 2 STAGE H COMPR * CUT ON-BOARD LINK W914 DEHUM OR HARMONY o 2 Heat / 1 Cool OFF S1 FURNACE OUTDOOR with t'stat with T'STAT TERM. STRIP UNIT humidity control H CUT ON-BOARD LINK W914 * DEHUM OR HARMONY o 2 Heat / 1 Cool OFF S1 FURNACE OUTDOOR T'STAT TERM. STRIP UNIT H DO NOT CUT ANY ON-BOARD LINKS * * Not required on all units. Page 45 DIP Switch Settings and Field Wiring Ignition Control 107045-XX DIP Switch Settings and On-Board Links DIP Switch 1 Thermostat Thermostat On Board Links Must Be Cut To Select Wiring Connections Heating System Options Stages Dual Fuel L7742U FURNACE HEAT PUMP TERM. STRIP Single Stage OFF T'STAT Heat Pump H H CUT ON-BOARD LINK ComfortSense W951 67M41* thermostat w/ HEAT PUMP bilities Capable of 2 L L stage gas heat Y control Y2 D B Y2 T outdoor sensor T Dual Fuel L7742U FURNACE Two Stage OFF T'STAT TERM. STRIP HEAT PUMP CUT ON-BOARD LINK Heat Pump W915 H H 2 STAGE ComfortSense COMPR 67M41* thermostat w/ bilities CUT ON-BOARD LINK W951 L L Capable of 2 HEAT stage gas heat PUMP control Y2 Y2 D out blue B T outdoor T sensor * Connect W1 to W1 ONLY if using defrost tempering kit 67M41 NOTE - Do NOT make a wire connection between the room thermostat L terminal and the L terminal of the furnace integrated control. Page 46 DIP Switch Settings and Field Wiring Ignition Control 107045-XX DIP Switch Settings and On-Board Links DIP Switch 1 Thermostat Thermostat On Board Links Must Be Cut To Select Wiring Connections Heating System Options Stages Dual Fuel L7742U FURNACE HEAT PUMP TERM. STRIP Single Stage OFF T'STAT Heat Pump H H CUT ON-BOARD LINK ComfortSense W951 67M41* thermostat w/ HEAT PUMP bilities Capable of 2 CUT ON-BOARD LINK L L W914 stage gas heat Y DEHUM OR Y2 midification HARMONY control D B Y2 T outdoor sensor T Dual Fuel L7742U FURNACE HEAT PUMP CUT ON-BOARD LINK TERM. STRIP Two Stage OFF T'STAT W915 Heat Pump 2 STAGE COMPR H H ComfortSense 67M41* thermostat w/ CUT ON-BOARD LINK W951 HEAT bilities PUMP Capable of 2 CUT ON-BOARD LINK L L stage gas heat W914 DEHUM OR Y2 Y2 midification HARMONY D B Y2 out blue T outdoor sensor T * Connect W1 to W1 ONLY if using defrost tempering kit 67M41 NOTE - Do NOT make a wire connection between the room thermostat L terminal and the L terminal of the integrated control. Page 47 EL297UHV With Ignition Control 107045-XX 7 N L1 INTERLOC DOORK W2 7 GROUNDEQUIPMENT S51 UNITOUTDOOR S1 HUMIDIFIER W1 ROOM THERMOSTAT L C Y2Y1 (IF USED120V AC) C P3 G J84P84 J3 P3J3 P84J84 R L1 N 2 BLK 2 C 7 NN 4 WHT 1 B6 3 RED 3 Y1 N P159 K1 K4 G Y2 COMBUSTION AIR N P3J3 J3P3 BLOWER MOTOR N 5 WHT 2 1 WHT 1 S51 K11 J159P159 R33 IGNITOR DOOR INTERLOCK K5 HUM INTEGRATED CONTROL 12 6 CONTROINTEGRATEDL SEE HUM VIEWSWITCHROLLOUTFLAMES LINE 34 S47 A92 CIRC A92 AC120C V K7 5 LIMIPRIMART Y S10 L1 67HUM DENOTES OPTIONAL COMPONENTCLASS II VOLTAGE FIELD WIRINGLINE VOLTAGE FIELD INSTALLE ACC FLAME BUTTONPUSHDIAGNOSTIC P84J84 WHT/PINK SENSE FLAME ACC SENSOR SENSOFLAMRE WHT BLK T1 120V LESEGMENDSEVENT CB8 W1 BURNER BLUE BLUE 5 THSEC24VAC TERMINAL BOARD YEL 24V VALVEGAGVS1 HOT W2 B6 J2 P2 G S D CONTROINTEGRATEDA92L S YEL 8 MV COM Y2 L1 IGNITOR INDUCER MOTORCOMBUSTION AIR C HI M Y1 LENNOX ORG 7 MVL C NEUTRALJ3 2011 C EL297UH110XE60CEL297UH090XE48CEL297UH070XE36BEL297UH045XE36B R33 PS2 K8 C PINK C NO PURPLE 2 P159J159 R S S102 J2 DH HIGH HEAT 32 1 PRESSURE SWITCH MVH TB1 8 2 HEAT 2 COOL BRW 1 L 6 5 4 O 9 8 7 PURPLE NO PNK 12 PS1 DS SWITCHROLLOUTFLAME HEATING UNITS-GAS C 12 11 10 S47 M HI C S128 BREAKERCIRCUIT TRANSFORMER LOW HEAT BLUE PRESSURE SWITCH HLI CB8 T1 6 VALVEGAGVS1 BRN W / YEL STRIPE BRW RO(OUT) 11 Supersedes (2) S47 (1) S47 MOTO P48 CHOKPOWERE S10 BLOWERINDOOR L13 SWITCPRESSURELOW HEATHS128SWITCPRESSUREHIGH HEATH R 4 S102 GND B3 4 Litho U.S.A. P49 GND GRN/YEL 10 AND ACCESSORIES.INSTRUCTIONS FOR CONNECTIONS TO OTHER EQUIPMENCONVENTIONAL THERMOSTAT. SEE INSTALLATIONTYPICAL SYSTEM SHOWN FOR 2 HEAT/2 COOL WITH RISE DESIRED.TONNAGE BEING APPLIED, AND HEATING TEMPERATURTO SET CORRECT BLOWER SPEED FOR SPECIFIC COOLINGNOTE: SEE INSTALLATION INSTRUCTIONS FOR PROCEDURE 9 3 2 HUMIDIFIER120VACHUMIDIFIER24VAC 24VAC 1 YEL 9 COM THERMOSTAT HEAT ANTICIPATION SETTIN SPEED TAPSUH110XE60CUH090XE48CUH070XE36BUH045XE36B TR .43 AMP.65 AMPWITH A 2 STAGE COOL THERMOSTATFROM Y1 TO Y2 AT A92 CONTROL WHEN USEDCUT W915 JUMPER LABELED "2 STAGE COMPR."USED FOR DUAL FUEL APPLICATIONS"HEAT PUMP", AT A92 CONTROL BOARD, WHENCUT W951 JUMPER FROM O TO R, LABELE7000 THERMOSTATWHEN USED WITH ComfortSensFROM DS TO R, AT A92 CONTROL BOARD,CUT W914 JUMPER LABELED DEHUMe UNIT GN/YLW WHT/BLK RO(IN) BLACK BRW 3 WHT WHITE RODGERS VALVEHONEYWELL VALVE HI J48 COM.24-V BLACKBLACBLACBLACK BLACK KHI COOLK RATING, INSULATION THICKNESS, AND TERMINATIOMUST BE REPLACED WITH WIRE OF LIKE SIZEIF ANY WIRE IN THIS APPLIANCE IS REPLACED,ITNOTEWITH NATIONAL AND LOCAL CODES.-OR DEATH.UNIT MUST BE GROUNDED IN ACCORDANCEELECTRIC SHOCK HAZARD,CAN CAUSE INJURYWARNING- N G L C SEE BLOWER SPEED CHART P48 BLOWER SPEED SELECTION 1 1 RED PARK BROWN BROWBROWNLOW COOLN MOTOBLOWERINDOORB3 LOW HEAT AT IFHUM BLUEBLUE 2 2 YLW AT IFHUM 3 3 BLUE HIGH HEAT C TO R OR H ON CS7000TO R C 4 4 BRN LOW COOL R TO L1TO C BROWBROWN N HIGH HEAT 5 5 BLK HIGH COOL G . D N BLUE BLUEBLUE P49J49 A LOW HEAT YELLOW YELLOYELLOYELLOWWW E TWO STAGEHEAT,COOL RED T 9 8 7 6 5 4 J,P159J,P3J,P84J,P2J,P49J,P48 , MODELSFOR HIGH HEAT ON 070XE36B OR 090XE48CALL MODELS. DO NOT USE YELLOW SPEED TAPDO NOT USE RED SPEED TAP FOR HIGH HEAT ON. DH AND L TERMINALS ARE NOT USEDUSE COPPER CONDUCTORS ONLYFIELD SUPPLIED ACC WIRESTAGE THERMOSTATDIP SWITCH FACTORY DEFAULT IS FOR A TWL13 USED ON 3/4 . LOWYELLOW RED REREDRED DPARK R R JACK/PLUG-IGNITIOJACK/PLUG-INDUCER/IGNITERJACK/PLUG-COMB AIR INDUCERJACK/PLUG-BURNER CONTROLJACK/PLUG-INDOOR BLOWER-SPD TAJACK/PLUG-INDOOR BLOWER-POWERP HEAT S1 ROOM THERMOSTAT 2 N W2 W2 2COOL JACKPLUG CHAR AND 1 HP ONLY Y2 Y2 W915 W1 W1 3 N Y1 Y1 HEAT PUMP O COOL T AUTO W914 W951 G G ON 2 1 FAN DS C C O Figure 61 Page 48 EL297UHV With Blower Drive and Ignition Control 107045-XX 7 N L1 INTERLOCK DOOR W2 7 GROUNDEQUIPMENT S51 UNIOUTDOORT S1 HUMIDIFIER W1 ROOM THERMOSTAT L C Y2Y1 (IF USED)120V ACC P3 G J84P84 J3 P3J3 P84J84 R L1 NN 2 BLK 2 C 7 4 WHT 1 B6 3 RED 3 Y1 N N P159J159 K1 K4 G Y2 NN P3J3 COMBUSTION AIR J3P3 BLOWER MOTOR 5 WHT 2 1 WHT 1 S51 K11 J159P159 R33 IGNITOR DOOR INTERLOCK K5 R TB83 HUM INTEGRATED CONTROL 9 12 6 CONTROINTEGRATEDL +l 10 SEE HUM VIEWSWITCHROLLOUTFLAMES LINE 11 3 S47 A92 CIRC -l -l +l OUTDOOR AIRDISCHARGSENSOTB78RE 12 A92 4 AC120VC K7 C 13 5 LIMITPRIMARY 14 S10 L1 R TB84 67HUM DENOTES OPTIONAL COMPONENTCLASS II VOLTAGE FIELD WIRINLINE VOLTAGE FIELD INSTALLED LINKRS BUTB82S 8 15 ACC +l 8 FLAME BUTTONPUSHDIAGNOSTIC WHT/PINK SENSE -l P84J84 FLAME ACC SENSOR C SENSORFLAME WHT BLK A2L T1 120V LESEGMENDSEVENT CB8 W1 BURNERS BLUE BLUE 5 THSE24VACC TERMINAL BOARD YEL 24V VALVGAGVES1 HOT W2 B6 J2 P2 G G CONTROINTEGRATEDA92L S YEL 8 MV COM Y2 L1 IGNITO INDUCER MOTOCOMBUSTION AIR R C HI M Y1 LENNOX ORG 7 MVL R C NEUTRALSJ3 2011 C EL297UH090XV48EL297UH090XV36EL297UH070XV36BEL297UH045XV36 R33 PS2K8 R PINK C NO PURPLE 2 P159J159 DH S102 J2 HIGH HEAT H MVH TB1 10 32 1 PRESSURE SWITCH P79 2 HEAT 2 COOL BRW 1 LO 6 5 4 9 8 7 PURPLE NO PNK 1 PS1 DS SWITCHROLLOUTFLAME C C B HEATING UNITS-GAS C 2 12 11 10 S47 M HI C S128 BREAKECIRCUIRT TRANSFORMER LOW HEAT BLUE PRESSURE SWITCH 6 HLI CB8 T1 EL297UH110XV60CEL297UH110XV48CEL297UH090XV60C VALVGAGVES1 BRW W / YEL STRIPE BRW RO(OUT) 11 Supersedes S10 (2) S47 (1) S47 MOTORP48 BLOWEINDOORR SWITCHPRESSURELOW HEATS128SWITCHPRESSUREHIGH HEAT S102 GND B3 4 Litho U.S.A. P49 GND GRN/YEL 10 AND ACCESSORIES.INSTRUCTIONS FOR CONNECTIONS TO OTHER EQUIPMENCONVENTIONAL THERMOSTAT. SEE INSTALLATIONTYPICAL SYSTEM SHOWN FOR 2 HEAT/2 COOL WITH RISE DESIRED.TONNAGE BEING APPLIED, AND HEATING TEMPERATURETO SET CORRECT BLOWER SPEED FOR SPECIFIC COOLINNOTE: SEE INSTALLATION INSTRUCTIONS FOR PROCEDURE 3 2 1 24VAC HUMIDIFIE120VACRHUMIDIFIE24VAC110XV60CR110XV48C090XV60C090XV48C090XV36C070XV36B045XV36BUNIT YEL 9 COM THERMOSTAT HEAT ANTICIPATION SETTINTWO STAGE COOL THERMOSTAT.COOL THERMOSTAT. CUT JUMPER Y1 TO Y2 FOAT A92 CONTROL BOARD. LEAVE IN FOR ONE STAGJUMPER W915 FROM Y1 TO Y2 IS FACTORY INSTALLED USED FOR DUAL FUEL APPLICATION"HEAT PUMP", AT A92 CONTROL BOARD, WHENCUT W951 JUMPER FROM O TO R, LABELED7000 THERMOSTATBOARD, WHEN USED WITH ComfortsensHARMONY" FROM DS TO R, AT A92 CONTROCUT W914 JUMPER LABELED "DEHUM ORS e TR .43 AMP.65 AMP RO(IN) BRW 3 DEFAULFACTORT Y FACTORY SHIPPED SETTING WHITE RODGERS VALVEHONEYWELL VALVE HEAT BLOWER SPEED CHART RATING, INSULATION THICKNESS, AND TERMINATIOMUST BE REPLACED WITH WIRE OF LIKE SIZEIF ANY WIRE IN THIS APPLIANCE IS REPLACED,INOTEWITH NATIONAL AND LOCAL CODES.-OR DEATH.UNIT MUST BE GROUNDED IN ACCORDANCELECTRIC SHOCK HAZARD,CAN CAUSE INJURWARNING- CHOKEPOWER L13 SENSOOUTDOORR HIGH COOL 4 8 DEFAULFACTORT YADJUST AIR SENSODISCHARGRE INTEGRATED AT IFHUM AT IFHUM CONTROL S A92 G C C USEDLIMITSSECONDARY R R TO L1TO TO R OR H ON CS7000TO L 0 E N C A TWO STAGHEAT,COOL11 10 1 2 3 9 8 7 6 5 4 T G DISCONNECTING COMMUNICATION CONNECTORDISCONNECTED BEFORE CONNECTING/POWER CONNECTOR MUST BE CONNECTED/ WITH icomfort THERMOSTATDH AND L TERMINALS ARE ONLY USEDSYSTEMS.INSTRUCTIONS FOR COMMUNICATINGREFER TO icomfort INSTALLATIONNON-COMMUNICATING SYSTEM ONLYTHERMOSTAT CONNECTIONS ARE FOTERMINALS ARE FOR icomfort USE ONLYDISCHARGE AND OUTDOOR AIUSE COPPER CONDUCTORS ONLYFIELD SUPPLIED ACC WIRSTAGE THERMOSTATDIP SWITCH FACTORY DEFAULT IS FOR A TWL13 USED ON 3/4 AND 1 HP ONLY.ER , Y (w dot ONsegment LECharacter on 7-) D T 1 2 E DRIVEBLOWEINDOORR 6 5 4 3 2 1 0 E 2 4 R HEAT R S1 ROOM THERMOSTAT 2 N 3 1 Program unit capacity/size W2 W2 4 5 2COOL 3 ModelFurnace U V W Y2 Y2 110XV60C110XV48C090XV60C090XV48C090XV36C070XV36B045XV36B 6 W915 11 W1 W1 REDYELBLUE P79 J79 LINKRS BUS 3 Y1 Y1 HEAT PUMP O COOL AUTO MOTOBLOWEINDOORR W914 W951 G G ON 1 HP3/41 HP3/41/2 HP1/2 HP1/2 HPMotor SizeCirculator 2 9 R 1 FAN DS HP HP R -l +l R +l -l C R +l -l C A2L C C O Figure 62 Page 49 EL297UHV-135 With Ignition Control 107045-XX 7 N L1 INTERLOCK DOOR W2 7 GROUNDEQUIPMENT S51 UNITOUTDOOR S1 HUMIDIFIER W1 ROOM THERMOSTAT L C Y2Y1 (IF USED120V AC) C G GRN P3 G J84P84 J3 P3 J3 P84J84 R L1 NN 2 PUR 2 C 7 4 YEL 1 B6 3 RED 3 Y1 N N LI BLK J159 K1 K4 G P159 Y2 NN P3 J3 COMBUSTION AIR J3P3 BLOWER MOTOR 5 WHT 2 1 WHT 1 S51 K11 J159P159 R33 IGNITOR DOOR INTERLOCK K5 R TB83 HUM INTEGRATED CONTROL 9 12 6 CONTROINTEGRATEDL +l 10 SEE HUM VIEWSWITCHROLLOUTFLAMS E LINE 11 3 S47 A92 CIRC -l -l +l OUTDOOR AIDISCHARGSENSOTB78RRE 12 A92 4 AC120VC K7 C 13 5 LIMIPRIMARYT 14 S10 L1 TB84 6 HUM DENOTES OPTIONAL COMPONENTCLASS II VOLTAGE FIELD WIRINLINE VOLTAGE FIELD INSTALLE R LINKRS BUTB82S 8 15 7 ACC +l 8 FLAME BUTTONPUSHDIAGNOSTIC WHT/PINK SENSE -l P84J84 FLAME ACC SENSOR C SENSOFLAMRE WHT 120V BLK A2L T1 LESEGMEND SEVENT CB8 W1 BURNER BLUE BLUE 5 THSEC24VAC TERMINAL BOARD YEL 24V VALVEGAGVS1 HOT W2 B6 J2 P2 G S GD CONTROINTEGRATEDA92L S YEL 8 MV COM Y2 L1 IGNITO INDUCER MOTOCOMBUSTION AIR C HI M Y1 LENNOX ORG 7 MVL R C NEUTRALSJ3 2011 C R33 PS2K8 R R PINK C NO PURPLE 2 P159J159 DH S102 J2 H HIGH HEAT 10 32 1 PRESSURE SWITCH MVH TB1 P79 2 HEAT 2 COOL BRW 1 L 6 5 4 EL297UH135XV60D O 9 8 7 PURPLE NO PNK 12 PS1 DS SWITCHROLLOUTFLAME HEATING UNITS-GAS C 12 11 10 S47 M HI C S128 BREAKERCIRCUIT TRANSFORMER LOW HEAT PRESSURE SWITCH HLI CB8 T1 BLUE 6 VALVEGAGVS 1 BRW W / YEL STRIPE BRW RO(OUT) 11 Supersedes (2) S47 (1) S47 MOTO P48 CHOKPOWEE R S10 BLOWERINDOOR L13 SWITCHPRESSURELOW HEATS128SWITCHPRESSUREHIGH HEAT R 4 S102 GND B3 4 Litho U.S.A. P49 GND GRN/YEL 10 AND ACCESSORIES.INSTRUCTIONS FOR CONNECTIONS TO OTHER EQUIPMENCONVENTIONAL THERMOSTAT. SEE INSTALLATIONTYPICAL SYSTEM SHOWN FOR 2 HEAT/2 COOL WITH RISE DESIRED.TONNAGE BEING APPLIED, AND HEATING TEMPERATURTO SET CORRECT BLOWER SPEED FOR SPECIFIC COOLINNOTE: SEE INSTALLATION INSTRUCTIONS FOR PROCEDURE 24VAC 3 2 1 HUMIDIFIE120VACRHUMIDIFIER 135XV60C 24VAC UNIT YEL 9 COM THERMOSTAT HEAT ANTICIPATION SETTING TR .43 AMP.65 AMPTWO STAGE COOL THERMOSTAT.COOL THERMOSTAT. CUT JUMPER Y1 TO Y2 FORAT A92 CONTROL BOARD. LEAVE IN FOR ONE STAGEJUMPER W915 FROM Y1 TO Y2 IS FACTORY INSTALLED USED FOR DUAL FUEL APPLICATION"HEAT PUMP", AT A92 CONTROL BOARD, WHENCUT W951 JUMPER FROM O TO R, LABELED7000 THERMOSTATBOARD, WHEN USED WITH ComfortsensHARMONY" FROM DS TO R, AT A92 CONTROCUT W914 JUMPER LABELED "DEHUM ORS e CHOKEPOWER RO(IN) L13 BRW 3 DEFAULFACTORTFACTORY SHIPPED SETTINGSY WHITE RODGERS VALVEHONEYWELL VALVE HEAT BLOWER SPEED CHART J48 4 RATING, INSULATION THICKNESS, AND TERMINATIONMUST BE REPLACED WITH WIRE OF LIKE SIZE,IF ANY WIRE IN THIS APPLIANCE IS REPLACED,ITNOTE-WITH NATIONAL AND LOCAL CODES.OR DEATH.UNIT MUST BE GROUNDED IN ACCORDANCELECTRIC SHOCK HAZARD,CAN CAUSE INJURYWARNING- 1 2 3 4 5 P48 HIGHCOOL 1 5 MOTORBLOWERINDOOR 2 1 B3 DEFAULFACTORADJUSTT Y 3 4 INTEGRATED AT IFCHUM AT IFCHUM 4 2 CONTROL 3 A92 USEDLIMITSSECONDARY 6 R TO L1TO TO R OR H ON CS7000TO 0 J79P79 L N C A TWO STAGHEAT,COOL E SENSOOUTDOOR R 10 T G 9 8 7 6 5 4 WITH icomfort THERMOSTATDH AND L TERMINALS ARE ONLY USEDSYSTEMS.INSTRUCTIONS FOR COMMUNICATINREFER TO icomfort INSTALLATIONNON-COMMUNICATING SYSTEM ONLYTHERMOSTAT CONNECTIONS ARE FORTERMINALS ARE FOR icomfort USE ONLYDISCHARGE AND OUTDOOR AIUSE COPPER CONDUCTORS ONLYFIELD SUPPLIED ACC WIRESTAGE THERMOSTATDIP SWITCH FACTORY DEFAULT IS FOR A TWOL13 USED ON 3/G .R4 (w dot ONsegment LECharacter on 7-) D 8 E 7 E AIR SENSODISCHARGRE R HEAT R S1 ROOM THERMOSTAT 2 W2 W2 Program unit capacity/size 2COOL AND 1 HP ONLY ModelFurnace Y2 Y2 135XV60C W915 W1 W1 LINKRS BUS 3 Y1 Y1 HEAT PUMP O COOL AUTO W914 W951 G G ON 1 HPMotor SizeCirculato 2 9 1 FAN DS -l +l R +l -l C R +l -l C A2L C C r Figure 63 8-1/8" wide x 7-9/16" height Page 50 EL297UHV-135 With Blower Drive and Ignition Control 107045-XX 7 N L1 INTERLOCK DOOR W2 7 GROUNDEQUIPMENT S51 UNIOUTDOOT R S1 HUMIDIFIER W1 ROOM THERMOSTAT L C Y2Y1 (IF USED)120V ACC G GRN P3 G J84P84 J3 P3 J3 P84J84 R L1 NN 2 PUR 2 C 7 4 YEL 1 B6 3 RED 3 Y1 N N LI BLK K1 K4 G P159 Y2 NN P3 J3 COMBUSTION AIR J3P3 BLOWER MOTOR 5 WHT 2 1 WHT 1 S51 K11 J159P159 R33 IGNITOR DOOR INTERLOCK K5 R TB83 HUM INTEGRATED CONTROL 9 12 6 CONTROINTEGRATEDL +l 10 SEE HUM VIEWSWITCROLLOUFLAMSH ET LINE 11 3 S47 A92 CIRC -l -l +l OUTDOOR AIRDISCHARGSENSOTB78RE 12 A92 4 AC120VC K7 C 13 5 LIMIPRIMARYT 14 S10 L1 TB84 6 HUM DENOTES OPTIONAL COMPONENTSCLASS II VOLTAGE FIELD WIRINGLINE VOLTAGE FIELD INSTALLED R LINKRS BUTB82S 8 15 7 ACC +l 8 FLAME BUTTOPUSHDIAGNOSTICN WHT/PINK SENSE -l P84J84 FLAME ACC SENSOR C SENSOFLAMRE WHT BLK A2L T1 120V LEDSEGMENSEVENT CB8 W1 BURNERS BLUE BLUE 5 THSE24VAC C TERMINAL BOARD YEL 24V VALVGASGV1E HOT W2 B6 J2 P2 G CONTROINTEGRATEDA92L YEL 8 MV COM Y2 L1 IGNITO INDUCER MOTOCOMBUSTION AIR R C HI M Y1 LENNOX ORG 7 MVL R C NEUTRALSJ3 2011 C R33 PS2K8 R PINK C NO PURPLE 2 P159J159 DH S102 J2 H HIGH HEAT 10 3 21 PRESSURE SWITCH MVH TB1 P79 2 HEAT 2 COOL BRW 1 L 6 5 4 EL297UH135XV60D O 9 8 7 PURPLE NO PNK 12 PS1 DS SWITCROLLOUFLAMH ET HEATING UNITS-GAS C 12 11 10 S47 M HI C S128 BREAKERCIRCUIT TRANSFORMER LOW HEAT BLUE PRESSURE SWITCH 6 HLI CB8 T1 VALVGASGV1E BRW W / YEL STRIPE BRW RO(OUT) 11 Supersedes (2) S47 (1) S47 MOTO P48 CHOKEPOWER S10 BLOWERINDOOR L13 SWITCPRESSURELOW HEATHS128SWITCPRESSUREHIGH HEATH R 4 S102 GND B3 4 Litho U.S.A. P49 GND GRN/YEL 10 AND ACCESSORIES.INSTRUCTIONS FOR CONNECTIONS TO OTHER EQUIPMENCONVENTIONAL THERMOSTAT. SEE INSTALLATIONTYPICAL SYSTEM SHOWN FOR 2 HEAT/2 COOL WITH RISE DESIRED.TONNAGE BEING APPLIED, AND HEATING TEMPERATURETO SET CORRECT BLOWER SPEED FOR SPECIFIC COOLINNOTE: SEE INSTALLATION INSTRUCTIONS FOR PROCEDURE 24VAC 3 2 1 HUMIDIFIE120VACRHUMIDIFIER 135XV60C 24VAC UNIT YEL 9 COM THERMOSTAT HEAT ANTICIPATION SETTIN TR .43 AM.65 AMP TWO STAGE COOL THERMOSTATPCOOL THERMOSTAT. CUT JUMPER Y1 TO Y2 FOAT A92 CONTROL BOARD. LEAVE IN FOR ONE STAGJUMPER W915 FROM Y1 TO Y2 IS FACTORY INSTALLED USED FOR DUAL FUEL APPLICATION"HEAT PUMP", AT A92 CONTROL BOARD, WHENCUT W951 JUMPER FROM O TO R, LABELE7000 THERMOSTATBOARD, WHEN USED WITH ComfortsensHARMONY" FROM DS TO R, AT A92 CONTROCUT W914 JUMPER LABELED "DEHUM ORS e RO(IN) BRW 3 DEFAULTFACTORFACTORY SHIPPED SETTINGY WHITE RODGERS VALVEHONEYWELL VALVE HEAT BLOWER SPEED CHART RATING, INSULATION THICKNESS, AND TERMINATIONMUST BE REPLACED WITH WIRE OF LIKE SIZEIF ANY WIRE IN THIS APPLIANCE IS REPLACED,ITNOTEWITH NATIONAL AND LOCAL CODES.-OR DEATH.UNIT MUST BE GROUNDED IN ACCORDANCEELECTRIC SHOCK HAZARD,CAN CAUSE INJURWARNING- CHOKPOWERE HIGHCOOL L13 SENSOOUTDOORR 8 . DEFAULTFACTORADJUSTY 4 INTEGRATED AT IFHUM AT IFHUM AIR SENSODISCHARGRE CONTROL S A92 G D C C USEDLIMITSSECONDARY R TO L1TO TO R OR H ON CS7000TO R 0 L N C A E 1 2 3 TWO STAGHEAT,COOL 10 T G 9 8 7 6 5 4 1 2 , Y DRIVBLOWEREINDOOR WITH icomfort THERMOSTADH AND L TERMINALS ARE ONLY USEDSYSTEMSINSTRUCTIONS FOR COMMUNICATINREFER TO icomfort INSTALLATIONON-COMMUNICATING SYSTEM ONLY.THERMOSTAT CONNECTIONS ARE FORTERMINALS ARE FOR icomfort USE ONLYDISCHARGE AND OUTDOOR AIUSE COPPER CONDUCTORS ONLYTFIELD SUPPLIED ACC WIRESTAGE THERMOSTATDIP SWITCH FACTORY DEFAULT IS FOR A TWOL13 USED ON 3/G .R4 (w dot ONsegment LECharacter on 7-) D 2 4 E 3 1 7 R HEAT R S1 ROOM THERMOSTAT 4 5 2 W2 W2 Program unit capacity/size U V W 3 11 2COOL 6 AND 1 HP ONLY ModeFurnacl e REDYELBLUE J79P79 Y2 Y2 135XV60C W915 W1 W1 MOTOBLOWERINDOOR LINKRS BUS 3 Y1 Y1 HEAT PUMP O COOL AUTO N R W914 W951 G G ON 1 HPMotor SizeCirculato 2 9 1 FAN DS -l +l R +l -l C R +l -l C A2L C C r Figure 64 Page 51 Ignition Control 107045-XX IGNITION CONTROL ACC LINE 1 HUM IGNITOR / CAI NEUTRAL FLAME SENSE TB82 TB84 TB1 RS-BUS LINK (TB82, future use) THERMOSTAT CONNECTIONS (TB1) DS = DEHUMIDIFICATION SIGNAL I+ = DATA HIGH CONNECTION I - = DATA LOW CONNECTION W2 = HEAT DEMAND FROM 2ND STAGE T/STAT R = 24VAC W1 = HEAT DEMAND FROM 1ST STAGE T/STAT I + = DATA HIGH CONNECTION R = CLASS 2 VOLTAGE TO THERMOSTAT I - = DATA LOW CONNECTION G = MANUAL FAN FROM T'STAT C = 24VAC COMMON (ground) C = THERMOSTAT SIGNAL GROUND CONNECTED TO TRANSFORMER GRD (TR) & CHASIS GROUND (GRD) RS-BUS INDOOR (TB84) Y1 = THERMOSTAT 1ST STAGE COOL SIGNAL R = 24VAC I + = DATA HIGH CONNECTION Y2 = THERMOSTAT 2ND STAGE COOL SIGNAL I - = DATA LOW CONNECTION C = 24VAC COMMON A2L=A2L REFRIGERANT O = THERMOSTAT SIGNAL TO HEAT PUMP REVERSING VALVE 1/4â€ QUICK CONNECT TERMINALS DH = DEHUMIDIFICATION OUTPUT COMMUNICATING HUM = UNPOWERED NORMALLY OPEN (DRY) CONTACTS THERMOSTAT ONLY XMFR = 120 VAC OUTPUT TO TRANSFORMER L = NOT USED H = LOW VOLTAGE (24 VAC) HUMIDIFICATION LI = 120 VAC INPUT TO CONTROL ACC = 120 VAC OUTPUT TO OPTIONAL ACCESSORY NEUTRALS = 120 VAC NEUTRAL Figure 65 Page 52 Integrated Control DIP Switch Settings TABLE 11 Conventional Thermostat (non-communicating) Blower Off Delay Switch Settings EL297UHV units are equipped with a two-stage, variable Blower Off Delay speed integrated control. This control manages ignition Switch 3 Switch 4 Seconds timing, heating mode fan off delays and indoor blower 60 On Off speeds based on selections made using the control dip switches and jumpers. The control includes an internal 90 (factory) Off Off watchguard feature which automatically resets the ignition 120 Off On control when it has been locked out. After one hour of con- 180 On On tinuous thermostat demand for heat, the watchguard will break and remake thermostat demand to the furnace and automatically reset the control to relight the furnace. Indoor Blower Operation DIP Switch Settings Note: All communicating settings are set at the commu- Switches 5 and 6 -- Cooling Mode Blower Speed -- The nicating thermostat. See thermosatat installation instruc- unit is shipped from the factory with the dip switches po- tion. In a communication system all DIP switch and clippa- sitioned for high speed (4) indoor blower motor operation ble link settings are ignored. For conventional thermostats during the cooling mode. TABLE 12 provides the cooling proceed with DIP switch and clippable link settings as out- mode blower speeds that will result from different switch lined in the following. settings. Switches 5 and 6 set the blower cfm for second- Heating Operation DIP Switch Settings stage cool. The integrated control automatically ramps Switch 1 -- Thermostat Selection -- This unit may be down to 70% of the second-stage cfm for first-stage cfm. used with either a single-stage or two-stage thermostat. Refer to tables for corresponding cfm values. See Product The thermostat selection is made using a DIP switch Specifications for more detailed blower cfm tables. which must be properly positioned for the particular appli- TABLE 12 cation. The DIP switch is factory-positioned for use with a twostage thermostat. If a single-stage thermostat is to be Cooling Mode Blower Speeds used, the DIP switch must be repositioned. Speed Switch 5 Switch 6 a. Select â€œOFFâ€ for two-stage heating operation controlled by a Low On On two-stage heating thermostat (factory setting); Medium Low Off On b. Select â€œONâ€ for two-stage heating operation controlled by a single-stage heating thermostat. This setting provides a Medium High On Off timed delay before second-stage heat is initiated. High (factory) Off Off Switch 2 -- Second Stage Delay (Used with Single- Stage Thermostat Only) -- This switch is used to deter- Switches 7 and 8 -- Cooling Blower Speed Adjustment mine the second stage on delay when a single-stage ther- mostat is being used. The switch is factory-set in the OFF -- The unit is shipped from the factory with the dip switches position, which provides a 7-minute delay before second- positioned for NORMAL (no) adjustment. The dip switches stage heat is initiated. If the switch is toggled to the ON may be positioned to adjust the blower speed by +10% position, it will provide a 12-minute delay before second- or -10% to better suit the application. TABLE 13 below stage heat is initiated. This switch is only activated when provides blower speed adjustments that will result from the thermostat selector jumper is positioned for SINGLE- different switch settings. Refer to tables for corresponding stage thermostat use. cfm values. See Product Specifications for more detailed Switches 3 and 4 -- Blower-Off Delay -- The blower-on blower cfm tables. delay of 30 seconds is not adjustable. The blower-off de- TABLE 13 lay (time that the blower operates after the heating de- mand has been satisfied) can be adjusted by moving Cooling Blower Speed Adjustment switches 3 and 4 on the integrated control. The unit is Adjustment Switch 7 Switch 8 shipped from the factory with a blower-off delay of 90 sec- +10% (approx) On Off onds. The blower off delay affects comfort and is adjust- Factory Default Off Off able to satisfy individual applications. Adjust the blower off delay to achieve a supply air temperature between 90Â° -10% (approx) Off On and 110Â°F at the exact moment that the blower is de-en- ergized. Longer off delay settings provide lower supply air Switches 9 and 10 -- Cooling Mode Blower Speed temperatures; shorter settings provide higher supply air Ramping -- Blower speed ramping may be used to en- temperatures. TABLE 11 provides the blower off timings hance dehumidification performance. The switches are that will result from different switch settings. factory set at option A which has the greatest effect on de- humidification performance. TABLE 14 provides the cool- ing mode blower speed ramping options that will result from different switch settings. The cooling mode blower mode blower speed ramping options are detailed on the next page. Page 53 NOTE - The off portion of the selected ramp profile also Ramping Option D applies during heat pump operation in dual fuel applica- â€¢ Motor runs at 100% until demand is satisfied. tions. â€¢ Once demand is met, motor ramps down to stop. TABLE 14 Cooling Mode Blower Speed Ramping Ramping Switch 9 Switch 10 100% CFM OFF OFF A (Factory) Off Off COMPRESSOR DEMAND B Off On C On Off D On On Switches 11, 12 and 13 -- Heating Mode Blower Speed The switches are factory set to the OFF position which Ramping Option A (Factory Selection) provides factory default heat speed. Refer to TABLE 15 for switches 11, 12 and 13 that provided the correspond- â€¢ Motor runs at 50% for 30 seconds. ing increases or decrease to both high and low heat de- â€¢ Motor then runs at 82% for approximately 7-1/2 mand. See TABLE 23 on page 72 for allowable heating minutes. speeds. â€¢ If demand has not been satisfied after 7-1/2 min- TABLE 15 utes, motor runs at 100% until demand is satisfied. Heating Mode Blower Speeds â€¢ Once demand is met, motor runs at 50% for 30 Heat Speed Switch 11 Switch 12 Switch 13 seconds then ramps down to stop. Increase 24% On On On Increase 18% On On Off Increase 12% On Off On OFF 7 1/2 MIN 100% 82% CFM CFM OFF Increae 6% On Off Off 1/2 MIN 1/2 MIN 50% CFM 50% CFM Factory Off Off Off COMPRESSOR DEMAND Default Decrease 6% Off Off On Decrease Off On Off Ramping Option B 12% â€¢ Motor runs at 82% for approximately 7-1/2 minutes. Decrease Off On On If demand has not been satisfied after 7-1/2 min- 18% utes, motor runs at 100% until demand is satisfied. â€¢ Once demand is met, motor ramps down to stop. Switches 14 and 15 -- Continuous Blower Speed -- TABLE 16 provides continuous blower speed adjustments that will result from different switch settings. 7 1/2 MIN 100% CFM OFF 82%CFM OFF COMPRESSOR DEMAND TABLE 16 Continuous Blower Speed Coninuous Blower Speed Switch 14 Switch 15 Ramping Option C 28% of High Cool Speed Off On â€¢ Motor runs at 100% until demand is satisfied. 38% of High Cool Speed Off Off â€¢ Once demand is met, motor runs at 100% for 45 (Factory Setting) seconds then ramps down to stop. Switch 16 - Not Used OFF 100% CFM 100% CFM OFF COMPRESSOR 45 SEC. DEMAND Page 54 Blower Data EL297UH045XV36B BLOWER PERFORMANCE (less filter) BOTTOM RETURN AIR 0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range HEATING 1 Heating Speed DIP Switch First Stage Heating Speed - cfm Second Stage Heating Speed - cfm Settings +24% 915 1125 +18% 865 1085 +12% 805 1040 +6% 780 985 Factory Default 740 925 â€“6% 665 875 â€“12% 630 800 â€“18% 585 735 COOLING 1 Cooling Speed First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm DIP Switch Settings Low Medium-Low Medium-High 2 High Low Medium-Low Medium-High 2 High + 630 755 850 960 905 1055 1195 1335 Factory Default 580 695 780 870 830 965 1100 1225 â€“ 505 635 715 795 755 885 1025 1125 EL297UH070XV36B BLOWER PERFORMANCE (less filter) BOTTOM RETURN AIR 0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range HEATING 1 Heating Speed DIP Switch First Stage Heating Speed - cfm Second Stage Heating Speed - cfm Settings +24% 1095 1220 +18% 1035 1170 +12% 985 1120 +6% 915 1055 Factory Default 850 995 â€“6% 835 915 â€“12% 755 845 â€“18% 695 810 COOLING 1 Cooling Speed First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm DIP Switch Settings Low Medium-Low Medium-High 2 High Low Medium-Low Medium-High 2 High + 635 765 885 1005 920 1085 1240 1410 Factory Default 585540 700 795 910 835 990 1135 1280 â€“ 640 720 810 745 895 1030 1160 1 Cooling and heating speeds are based on a combination of DIP switch settings on the furnace control. Refer to Installation Instructions for specific DIP Switch Settings. 2 Factory default setting. NOTES - The effect of static pressure is included in air volumes shown. First stage HEAT is approximately 91% of the same second stage HEAT. First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position. Continuous Fan Only speed is selectable at 28% and 38% of the selected second stage cooling speed - minimum 250 cfm. Lennox iHarmonyÂ® Zoning System Applications - Minimum blower speed is 250 cfm. Page 55 Blower Data EL297UH090XV36C BLOWER PERFORMANCE (less filter) BOTTOM RETURN AIR 0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range HEATING 1 Heating Speed DIP Switch First Stage Heating Speed - cfm Second Stage Heating Speed - cfm Settings +24% 1215 1300 +18% 1140 1240 +12% 1100 1170 +6% 1020 1115 Factory Default 965 1070 â€“6% 915 970 â€“12% 850 925 â€“18% 805 855 COOLING 1 Cooling Speed First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm DIP Switch Settings Low Medium-Low Medium-High 2 High Low Medium-Low Medium-High 2 High + 660 775 865 975 910 1075 1230 1405 Factory Default 615 720 800 885 835 985 1125 1265 â€“ 560 660 740 810 750 890 1015 1150 EL297UH090XV48C BLOWER PERFORMANCE (less filter) BOTTOM RETURN AIR 0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range HEATING 1 Heating Speed DIP Switch First Stage Heating Speed - cfm Second Stage Heating Speed - cfm Settings +24% 1490 1645 +18% 1415 1565 +12% 1330 1480 +6% 1295 1405 Factory Default 1220 1325 â€“6% 1150 1260 â€“12% 1065 1190 â€“18% 1010 1105 COOLING 1 Cooling Speed First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm DIP Switch Settings Low Medium-Low Medium-High 2 High Low Medium-Low Medium-High 2 High + 840 1005 1155 1315 1165 1375 1580 1770 Factory Default 780 915 1045 1190 1075 1265 1440 1645 â€“ 690 835 955 1070 935 1145 1320 1465 1 Cooling and heating speeds are based on a combination of DIP switch settings on the furnace control. Refer to Installation Instructions for specific DIP Switch Settings. 2 Factory default setting. NOTES - The effect of static pressure is included in air volumes shown. First stage HEAT is approximately 91% of the same second stage HEAT. First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position. Continuous Fan Only speed is selectable at 28% and 38% of the selected second stage cooling speed - minimum 380 cfm. Lennox iHarmonyÂ® Zoning System Applications - Minimum blower speed is 380 cfm. Page 56 Blower Data EL297UH090XV60C BLOWER PERFORMANCE (less filter) BOTTOM RETURN AIR 0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range HEATING 1 Heating Speed DIP Switch First Stage Heating Speed - cfm Second Stage Heating Speed - cfm Settings +24% 1490 1985 +18% 1435 1915 +12% 1335 1805 +6% 1280 1645 Factory Default 1185 1625 â€“6% 1095 1530 â€“12% 990 1450 â€“18% 900 1345 COOLING 1 Cooling Speed First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm DIP Switch Settings Low Medium-Low Medium-High 2 High Low Medium-Low Medium-High 2 High + 1085 1240 1360 1540 1545 1770 1970 2210 Factory Default 1000 1135 1250 1385 1390 1605 1800 1980 â€“ 895 1040 1135 1255 1440 1440 1620 1800 EL297UH110XV48C BLOWER PERFORMANCE (less filter) BOTTOM RETURN AIR 0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range HEATING 1 Heating Speed DIP Switch First Stage Heating Speed - cfm Second Stage Heating Speed - cfm Settings +24% 1470 1605 +18% 1450 1495 +12% 1385 1445 +6% 1295 1385 Factory Default 1225 1305 â€“6% 1160 1225 â€“12% 1090 1150 â€“18% 1035 1070 COOLING 1 Cooling Speed First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm DIP Switch Settings Low Medium-Low Medium-High 2 High Low Medium-Low Medium-High 2 High + 810 980 1085 1235 1100 1325 1530 1760 Factory Default 760 875 1010 1135 1025 1205 1405 1565 â€“ 695 805 905 1040 920 1080 1260 1440 1 Cooling and heating speeds are based on a combination of DIP switch settings on the furnace control. Refer to Installation Instructions for specific DIP Switch Settings. 2 Factory default setting. NOTES - The effect of static pressure is included in air volumes shown. First stage HEAT is approximately 91% of the same second stage HEAT. First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position. Continuous Fan Only speed is selectable at 28% and 38% of the selected second stage cooling speed - minimum 380 cfm. Lennox iHarmonyÂ® Zoning System Applications - Minimum blower speed is 450 cfm. for EL297UH090XV60C and 380 cfm for EL297UH110XV48C Page 57 Blower Data EL297UH110XV60C BLOWER PERFORMANCE (less filter) BOTTOM RETURN AIR 0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range HEATING 1 Heating Speed DIP Switch First Stage Heating Speed - cfm Second Stage Heating Speed - cfm Settings +24% 1385 1965 +18% 1475 1880 +12% 1355 1790 +6% 1370 1725 Factory Default 1200 1630 â€“6% 1140 1550 â€“12% 1070 1460 â€“18% 980 1345 COOLING 1 Cooling Speed First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm DIP Switch Settings Low Medium-Low Medium-High 2 High Low Medium-Low Medium-High 2 High + 1085 1235 1335 1525 1525 1745 1950 2185 Factory Default 990 1130 1240 1365 1375 1580 1780 1970 â€“ 895 1025 1130 1250 1250 1415 1600 1780 EL297UH135XV60D BLOWER PERFORMANCE (less filter) BOTTOM RETURN AIR 0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range HEATING 1 Heating Speed DIP Switch First Stage Heating Speed - cfm Second Stage Heating Speed - cfm Settings +24% 1770 2125 +18% 1680 2015 +12% 1610 1935 +6% 1485 1855 Factory Default 1440 1740 â€“6% 1360 1650 â€“12% 1285 1565 â€“18% 1215 1460 COOLING 1 Cooling Speed First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm DIP Switch Settings Low Medium-Low Medium-High 2 High Low Medium-Low Medium-High 2 High + 1095 1260 1400 1590 1585 1805 2020 2275 Factory Default 1000 1145 1270 1435 1440 1635 1840 2030 â€“ 906 1035 1145 1275 1290 1480 1660 1840 1 Cooling and heating speeds are based on a combination of DIP switch settings on the furnace control. Refer to Installation Instructions for specific DIP Switch Settings. 2 Factory default setting. NOTES - The effect of static pressure is included in air volumes shown. First stage HEAT is approximately 91% of the same second stage HEAT. First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position. Continuous Fan Only speed is selectable at 28% and 38% of the selected second stage cooling speed - minimum 450 cfm. Lennox iHarmonyÂ® Zoning System Applications - Minimum blower speed is 450 cfm. Page 58 Refer to TABLE 17 for operation sequence in applications On-Board Links including EL297UHV, a thermostat which features hu- Note: In communicating systems with a conventional out- midity control and a single-speed outdoor unit. TABLE 18 door unit (non-communicating), the on-board clippable gives the operation sequence in applications with a two- links must be set to properly configure the system. speed outdoor unit. WARNING On-Board Link W951 Heat Pump (R to O) Carefully review all configuration information provided. On-board link W951 is a clippable connection between Failure to properly set DIP switches, jumpers and on- terminals R and O on the integrated control. W951 must board links can result in improper operation! be cut when the furnace is installed in applications which include a heat pump unit and a thermostat which features On-Board Link W914 Dehum or Harmony (R to DS) dual fuel use. If the link is left intact, terminal â€œOâ€ will re- On-Board Link W914 Dehum or Harmony (R to DS) On- main energized eliminating the HEAT MODE in the heat board link W914, is a clippable connection between termi- pump. nals R and DS on the integrated control. W914 must be On-Board Link W915 2 Stage Compr (Y1 to Y2) cut when the furnace is installed with either the Harmony On-board link W915 is a clippable connection between III zone control or a thermostat which features humidity terminals Y1 and Y2 on the integrated control. W915 must control. If the link is left intact the PMW signal from the be cut if two-stage cooling will be used. If the Y1 to Y2 link Harmony III control will be blocked and also lead to control is not cut the outdoor unit will operate in second-stage damage cooling only. TABLE 17 OPERATING SEQUENCE Non-Communicating Thermostat with Humidity Control Feature and Single-Speed Outdoor Unit OPERATING SEQUENCE SYSTEM DEMAND SYSTEM RESPONSE Thermostat Demand Relative Humidity Blower System Compre Step CFM Comments Condition Y1 O G W1 Status D ssor (cool) NO CALL FOR DEHUMIDIFICATION Compressor and 24 Normal Operation 1 On On On Acceptable High 100% indoor blower follow VAC thermostat demand BASIC MODE (only active on a Y1 thermostat demand) 24 ComfortSenseÂ® 7500 Normal Operation 1 On On On Acceptable High 100% VAC thermostat energizes Y1 and de-energizes Dehumidification 2 On On On Demand 0 VAC High 70% D on a call for de- call humidification PRECISION MODE (operates independent of a Y1 demand) 24 Dehumidification Normal Operation 1 On On On Acceptable High 100% VAC mode begins when Dehumidification humidity is greater 2 On On On Demand 0 VAC High 70% Call than set point ComfortSenseÂ® 7500 thermostat will try to maintain room Dehumidification humidity setpoint by 1 On On On Demand 0 VAC High 70% Call Only allowing the room space to maintain a cooler room thermostat setpoint** Jumpers at indoor unit with a single stage outdoor unit. With Condensing unit - Cut W914 (R to DS) on SureLightÂ® control With Heat Pump - Cut W914 (R to DS) & W951 (R to O) on SureLightÂ® control Dave Lennox ComfortSenseÂ® 7000 thermostat to use for this application - Y2081 4 heat / 2 cool *Dehumidification blower speed is 70% of COOL speed for all units . **In Precision mode, ComfortSenseÂ® 7000 thermostat will maintain room temperature up to 2 Â°F (1.2Â°C) cooler than room setting. Page 59 TABLE 18 OPERATING SEQUENCE Non-Communicating Thermostat with Humidity Control Feature and Two-Speed Outdoor Unit OPERATING SYSTEM DEMAND SYSTEM RESPONSE SEQUENCE Thermostat Demand Relative Humidity Blower System Compre Step CFM Comments Condition Y1 Y2 O G W1 W2 Status D ssor (cool) NO CALL FOR DEHUMIDIFICATION Normal Operation 24 1 On On On Acceptable Low 70% Compressor and indoor Y1 VAC blower follow thermostat Normal Operation 24 2 On On On On Acceptable High 100% demand Y2 VAC ROOM THERMOSTAT CALLS FOR FIRST STAGE COOLING BASIC MODE (only active on a Y1 thermostat demand) 24 ComfortSenseÂ® 7500 Normal Operation 1 On On On Acceptable Low 70% VAC thermostat energizes Y1 Dehumidification 0 and de-energizes D on a 2 On On On On Demand High 70% call VAC call for de-humidification PRECISION MODE (operates independent of a Y1 demand) 24 Normal Operation 1 On On On Acceptable Low 70% Dehumidification mode VAC begins when humidity is Dehumidification 0 2 On On On On Demand High 70% greater than set point Call VAC ComfortSenseÂ® 7500 thermostat will try to maintain room humidity Dehumidification 0 1 On On On On Demand High 70% setpoint by allowing the Call Only VAC room space to maintain a cooler room thermostat setpoint** ROOM THERMOSTAT CALLS FOR FIRST AND SECOND STAGE COOLING BASIC MODE (only active on a Y1 thermostat demand) 24 ComfortSenseÂ® 7500 Normal Operation 1 On On On On Acceptable High 100% VAC thermostat energizes Y2 Dehumidification 0 and de-energizes D on a 2 On On On On Demand High 70% Call VAC call for de-humidification PRECISION MODE (operates independent of a Y1 thermostat demand) 24 Normal Operation 1 On On On Acceptable Low 70% Dehumidification mode VAC begins when humidity is Dehumidification 0 2 On On On On Demand High 70% greater than set point Call VAC Dehumidification 0 ComfortSenseÂ® 7500 1 On On On On Demand High 70% Call ONLY VAC thermostat will try to Jumpers at indoor unit with a two stage outdoor unit maintain room humidity setpoint by allowing the Cut factory jumper from Y1 to Y2 or cut W915 (Y1 to Y2) room space to maintain With Condensing unit - Cut W914 (R to DS) on SureLightÂ® control a cooler room thermostat With Heat Pump - Cut W914 (R to DS) & W951 (R to O) on SureLightÂ® control setpoint*** Dave Lennox ComfortSenseÂ® 7000 thermostat to use for this application - Y2081 4 heat / 2 cool *Normal operation first stage cooling blower speed is 70% COOL speed. **Dehumidification blower speed is, reduced to 70% of COOL. ***In Precision mode, ComfortSenseÂ® 7000 thermostat will maintain room temperature up to 2 Â°F (1.2Â°C) cooler than room setting. Page 60 Unit Start Up WARNING FOR YOUR SAFETY READ BEFORE OPERATING If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal WARNING injury or death. Do not use this furnace if any part has been underwater. A flood-damaged furnace is extremely dangerous. Gas Valve Operation (Figure 66) Attempts to use the furnace can result in fire or explosion. 1 - STOP! Read the safety information at the beginning Immediately call a qualified service technician to inspect of this section. the furnace and to replace all gas controls, control 2 - Set the thermostat to the lowest setting. system parts, and electrical parts that have been wet or 3 - Turn off all electrical power to the unit. to replace the furnace, if deemed necessary. 4 - This furnace is equipped with an ignition device which automatically lights the burners. Do not try to WARNING light the burners by hand. Danger of explosion. Can cause injury or 5 - Remove the access panel. product or property damage. If overheating 6 - Move gas valve switch to OFF. See figure 65. occurs or if gas supply fails to shut off, shut 7 - Wait five minutes to clear out any gas. If you then off the manual gas valve to the appliance smell gas, STOP! Immediately call your gas supplier before shutting off electrical supply. from a neighborâ€™s phone. Follow the gas supplierâ€™s instructions. If you do not smell gas go to next step. CAUTION 8 - Move gas valve switch to ON. See Figure 66. Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at disconnect switch. WHITE RODGERS GAS VALVE HIGH FIRE LOW FIRE BEFORE LIGHTING the unit, smell all around the furnace MANIFOLD ADJUSTMENT ADJUSTMENT PRESSURE TAP (under cap) area for gas. Be sure to smell next to the floor because (under cap) some gas is heavier than air and will settle on the floor. The gas valve on the EL297UHV is equipped with a gas control switch (lever). Use only your hand to moveswitch. Never use tools. If the the switch will not move by hand, do not try to repair it. Force or attempted repair may result in a fire or explosion. Placing the furnace into operation: EL297UHV units are equipped with an automatic hot surface ignition system. Do not attempt to manually light INLET PRESSURE POST burners on this furnace. Each time the thermostat calls for heat, the burners will automatically light. The ignitor does GAS VALVE SHOWN IN ON POSITION not get hot when there is no call for heat on these units. Figure 66 Priming Condensate Trap 9 - Replace the access panel. The condensate trap should be primed with water prior 10 - Turn on all electrical power to to the unit. to start-up to ensure proper condensate drainage. Either pour 10 fl. oz. (300 ml) of water into the trap, or follow 11 - Set the thermostat to desired setting. these steps to prime the trap: NOTE - When unit is initially started, steps 1 through 1 - Follow the lighting instructions to place the unit into 11 may need to be repeated to purge air from gas operation. line. 2 - Set the thermostat to initiate a heating demand. 12 - If the appliance will not operate, follow the instructions â€œTurning Off Gas to Unitâ€ and call your 3 - Allow the burners to fire for approximately 3 minutes. service technician or gas supplier. 4 - Adjust the thermostat to deactivate the heating Turning Off Gas to Unit demand. 1 - Set the thermostat to the lowest setting. 5 - Wait for the combustion air inducer to stop. Set the thermostat to initiate a heating demand and again 2 - Turn off all electrical power to the unit if service is to allow the burners to fire for approximately 3 minutes. be performed. 6 - Adjust the thermostat to deactivate the heating 3 - Remove the access panel. demand and wait for the combustion air inducer to stop. At this point, the trap should be primed with sufficient water to ensure proper condensate drain operation. Page 61 4 - Move gas valve switch to OFF. Furnace should operate at least 5 minutes before check- 5 - Replace the access panel. ing gas flow. Determine time in seconds for two revolu- tions of gas through the meter. (Two revolutions assures Failure To Operate a more accurate time.) Divide by two and compare to time If the unit fails to operate, check the following: in TABLE 19. If manifold pressure matches TABLE 21 and 1 - Is the thermostat calling for heat? rate is incorrect, check gas orifices for proper size and restriction. Remove temporary gas meter if installed. 2 - Are access panels securely in place? NOTE - To obtain accurate reading, shut off all other gas 3 - Is the main disconnect switch closed? appliances connected to meter. 4 - Is there a blown fuse or tripped breaker? Supply Pressure Measurement 5 - Is the filter dirty or plugged? Dirty or plugged filters An inlet post located on the gas valve provides access will cause the limit control to shut the unit off. to the supply pressure. See Figure 66. Back out the 3/32 6 - Is gas turned on at the meter? hex screw one turn, connect a piece of 5/16 tubing and 7 - Is the manual main shut-off valve open? connect to a manometer to measure supply pressure. See 8 - Is the internal manual shut-off valve open? TABLE 21 for supply line pressure. 9 - Is the unit ignition system in lockout? If the unit On multiple unit installations, each unit should be checked locks out again, inspect the unit for blockages. separately, with and without units operating. Supply pres- sure must fall within range listed in TABLE 21. Heating Sequence Of Operation Manifold Pressure Measurement 1 - When thermostat calls for heat, combustion air inducer starts. NOTE - Pressure test adapter kit (10L34) is available from Lennox to facilitate manifold pressure measurement. 2 - Combustion air pressure switch proves blower operation. Switch is factory set and requires no A manifold pressure post located on the gas valve pro- adjustment. vides access to the manifold pressure. See Figure 66. Back out the 3/32 hex screw one turn, connect a piece 3 - After a 15-second prepurge, the hot surface ignitor of 5/16 tubing and connect to a manometer to measure energizes. manifold pressure. 4 - After a 20-second ignitor warm-up period, the gas To correctly measure manifold pressure, the differential valve solenoid opens. A 4-second trial for ignition pressure between the positive gas manifold and the neg- period begins.â€ ative burner box must be considered. 5 - Gas is ignited, flame sensor proves the flame, and 1 - Connect the test gauge positive side â€œ+â€œ to manifold the combustion process continues. pressure tap on gas valve as noted above. 6 - If flame is not detected after first ignition trial, 2 - Tee into the gas valve regulator vent hose and the ignition control will repeat steps 3 and 4 four connect to test gauge negative â€œ-â€. more times before locking out the gas valve (â€œWATCHGUARDâ€ flame failure mode). The ignition 3 - Ignite unit on low fire and let run for 5 minutes to control will then automatically repeat steps 1 through allow for steady state conditions. 6 after 60 minutes. To interrupt the 60-minute 4 - After allowing unit to stabilize for 5 minutes, record â€œWATCHGUARDâ€ period, move thermostat from manifold pressure and compare to value given in â€œHeatâ€ to â€œOFFâ€ then back to â€œHeatâ€. Heating TABLE 21. sequence then restarts at step 1. 5 - If necessary, make adjustments. Figure 62 shows location of high fire and low fire adjustment screws. Gas Pressure Adjustment 6 - Repeat steps 3, 4 and 5 on high fire. See values in Gas Flow (Approximate) TABLE 21. TABLE 19 7 - Shut unit off and remove manometer as soon as GAS METER CLOCKING CHART an accurate reading has been obtained. Turn the supply and manifold 3/32â€ hex screws one revolution Seconds for One Revolution back into the gas valve. EL297 Natural LP 8 - Start unit and perform leak check. Seal leaks if Unit 1 cu ft 2 cu ft 1 cu ft 2 cu ft found. Dial Dial Dial Dial -045 80 160 200 400 -070 55 110 136 272 -090 41 82 102 204 -110 33 66 82 164 -135 27 54 68 136 Natural-1000 btu/cu ft LP-2500 btu/cu ft Page 62 Proper Cumbustion High Altitude Furnace should operate minimum 15 minutes with correct NOTE - In Canada, certification for installations at eleva- manifold pressure and gas flow rate before checking com- tions over 4500 feet (1372 m) is the jurisdiction of local bustion. Take combustion sample beyond the flue outlet authorities. and compare to the table below. Units may be installed at altitudes up to 10,000 ft. above sea level. See TABLE 21 for de-rate manifold values. Units TABLE 20 installed at altitude of 7501 - 10,000 feet require an orifice EL297 CO2% For Nat CO2% For L.P change. Units installed at altitude of 4501 - 10,000 feet Model Low Fire High Fire Low Fire High Fire require a pressure switch change which can be ordered separately. TABLE 22 lists conversion kit and pressure 045 5.4 - 6.4 7.5 - 8.5 6.4 - 7.4 8.8 - 9.8 switch requirements at varying altitudes. 070 5.3 - 6.3 7.4 - 8.4 6.3 - 7.3 8.7 - 9.7 The combustion air pressure switch is factory-set and re- 090 5.8 - 6.8 7.6 - 8.6 6.8 - 7.8 8.9 - 9.9 quiresno adjustment. 110 6.1 - 7.1 8.0 - 9.0 7.1 - 8.1 9.3 - 10.3 135 6.1 - 7.1 7.8 - 8.8 7.1 - 8.2 9.1 - 10.1 The maximum carbon monoxide reading should not exceed 100ppm. TABLE 21 Manifold and Supply Line Pressure 0-10,000ft. Manifold Pressure in. wg. Supply Line Pressure in. w.g 0 - 4500 ft 4501 - 5500 ft. 5501 - 6500 ft 6501 - 7500 ft 7501 - 10,000 ft Unit Gas 0 - 10,000 ft. Low High Low High Low High Low High Low High Min Max Fire Fire Fire Fire Fire Fire Fire Fire Fire Fire Natuarl 1.7 3.5 1.6 3.3 1.5 3.2 1.5 3.1 1.7 3.5 4.5 13.0 All LP/ Sizes 4.5 10.0 4.2 9.4 4.0 9.1 3.9 8.9 4.5 10.0 11.0 13.0 Propane NOTE - A natural to L.P. propane gas changeover kit is necessary to convert this unit. Refer to the changeover kit installation instruction for the conversion procedure. TABLE 22 LP/Propane Conversion Kit and Pressure Switch Requirements at Varying Altitudes High Altitude High Altitude LP/ Natural to Natural Burner Propane Burner High Altitude Pressure Switch Unit LP/Propane Orifice Kit Orifice Kit 0 - 7500 ft 7501 - 10,000 ft 7501 - 10,000 ft 4501 - 7500 ft 7501 - 10,000 ft 045 14A51 14A53 070 14A48 14A54 090 *11K51 73W37 *11K46 14A54 14A53 110 25B93 14A45 135 25B94 25B95 * Conversion requires installation of a gas valve manifold spring which is provided with the gas conversion kit. Pressure switch is factory set. No adjustment necessary. All models use the factory-installed pressure switch from 0-4500 feet (0-1370 m). Page 63 Testing for Proper Venting and Sufficient Combustion Air for Non-Direct Vent Applications 8 - If improper venting is observed during any of the WARNING above tests, the venting system must be corrected CARBON MONOXIDE POISONING HAZARD! or sufficient combustion/make-up air must be provided. The venting system should be re-sized Failure to follow the steps outlined below for each to approach the minimum size as determined by appliance connected to the venting system being placed using the appropriate tables in appendix G in the into operation could result in carbon monoxide poisoning current standards of the National Fuel Gas Code or death. ANSI-Z223.1/NPFA 54 in the U.S.A., and the The following steps shall be followed for each appliance appropriate Natural Gas and Propane appliances connected to the venting system being placed into venting sizing tables in the current standard of the operation, while all other appliances connected to the CSA-B149 Natural Gas and Propane Installation venting system are not in operation. Codes in Canada. 9 - After determining that each appliance remaining After the EL297UHV gas furnace has been started, the connected to the common venting system properly following test should be conducted to ensure proper vent- vents when tested as indicated in step 3, return ing and sufficient combustion air has been provided to the doors, windows, exhaust fans, fireplace dampers EL297UHV as well as to other gas-fired appliances which and any other gas-burning appliance to their are separately vented. previous condition of use. If a EL297UHV furnace replaces a Category I furnace Repair Parts which was commonly vented with another gas appliance, the size of the existing vent pipe for that gas appliance The following repair parts are available through Lennox must be checked. Without the heat of the original furnace dealers. When ordering parts, include the complete fur- flue products, the existing vent pipe is probably oversized nace model number listed on the CSA nameplate -- Ex- for the single water heater or other appliance. The vent ample: EL297UHV045P24B-01. All service must be per- should be checked for proper draw with the remaining ap- formed by a licensed professional installer (or equivalent), pliance. service agency, or gas supplier. The test should be conducted while all appliances (both Cabinet Parts in operation and those not in operation) are connected to Outer access panel the venting system being tested. If the venting system has Blower access panel been installed improperly, or if provisions have not been made for sufficient amounts of combustion air, corrections Top Cap must be made as outlined in the previous section. Control Panel Parts 1 - Seal any unused openings in the venting system. Transformer 2 - Visually inspect the venting system for proper Integrated control board size and horizontal pitch. Determine there is no Door interlock switch blockage or restriction, leakage, corrosion, or other Blower Parts deficiencies which could cause an unsafe condition. Blower wheel 3 - To the extent that it is practical, close all building doors and windows and all doors between the Motor space in which the appliances connected to the Motor mounting frame venting system are located and other spaces of the Motor control building. Blower housing cutoff plate 4 - Close fireplace dampers. Heating Parts 5 - Turn on clothes dryers and any appliances not Flame Sensor connected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom Heat exchanger assembly exhausts, so they will operate at maximum speed. Gas manifold Do not operate a summer exhaust fan. Combustion air inducer 6 - Follow the lighting instruction to place the appliance Gas valve being inspected into operation. Adjust thermostat so appliance will operate continuously. Main burner cluster 7 - Use the flame of match or candle to test for spillage Main burner orifices of flue gases at the draft hood relief opening after 5 Pressure switch minutes of main burner operation. Ignitor Primary limit control Flame rollout switches Page 64 Applications Using a Two-Stage Thermostat Other Unit Adjustments See Figure 67 for ignition control sequence NOTE - See troubleshooting flow charts if any safety A - Heating Sequence -- Integrated Control Thermostat switches are found to be open. Selection DIP Switch 1 OFF in â€œTwo-Stageâ€ Position Primary Limit. (Factory Setting) The primary limit is located on the heating compartment 1 - On a call for heat, thermostat first-stage contacts vestibule panel. This limit is factory set and requires no close sending a signal to the integrated control. The integrated control runs a self-diagnostic program adjustment. and checks high temperature limit switches for Flame Rollout Switches (Two) normally closed contacts and pressure switches for normally open contacts. The combustion air inducer These manually reset switches are located on the front of is energized at low speed. the burner box. 2 - Once the control receives a signal that the low Pressure Switch pressure switch has closed, the combustion air inducer begins a 15-second pre-purge in low speed. The pressure switch is located in the heating compartment NOTE - If the low fire pressure switch does not close on the cold end header box. This switch checks for proper the combustion air inducer will switch to high fire. combustion air inducer operation before allowing ignition After a 15 second pre-purge the high fire pressure trial. The switch is factory-set and must not be adjusted. switch will close and the unit will begin operation on Temperature Rise high fire. After 10 to 20 seconds of high fire opera- tion the unit will switch to low fire.. Place the unit into operation with a second-stage heating 3 - After the pre-purge is complete, a 20-second initial demand. After supply and return air temperatures have ignitor warm-up period begins. The combustion air stabilized, check the temperature rise. If necessary, adjust inducer continues to operate at low speed. the heating blower speed to maintain the temperature rise within the range shown on the unit nameplate. See TABLE 4 - After the 20-second warm-up period has ended, 23 on page 72 for allowable heating speeds. Increase the gas valve is energized on low fire (first stage) the blower speed to decrease the temperature rise. De- and ignition occurs. At the same time, the control crease the blower speed to increase the temperature rise. module sends a signal to begin an indoor blower Failure to properly adjust the temperature rise may cause 30-second ON-delay. When the delay ends, the erratic limit operation. indoor blower motor is energized on the low fire heating speed, the HUM contacts close energizing Electrical the humidifier and 120V ACC terminal is energized. 1 - Check all wiring for loose connections. The furnace will continue this operation as long as the thermostat has a first-stage heating demand. 2 - Check for the correct voltage at the furnace (furnace operating). Correct voltage is 120VAC + 10% 5 - If second-stage heat is required, the thermostat second- stage heat contacts close and send a signal 3 - Check amp-draw on the blower motor with blower to the integrated control. The integrated control access panel in place. initiates a 30-second second-stage recognition Unit Nameplate__________Actual__________ delay. Exhaust and Air Intake Pipe 6 - At the end of the recognition delay, the integrated control energizes the combustion air inducer at 1 - Check exhaust and air intake connections for high speed. The control also checks the high fire tightness and to make sure there is no blockage. (second stage) pressure switch to make sure it is 2 - Is pressure switch closed? Obstructed exhaust pipe closed. The high fire (second stage) gas valve is will cause unit to shut off at pressure switch. Check energized and the indoor blower motor is energized termination for blockages. for operation at the high fire heating speed. 3 - Obstructed pipe or termination may cause rollout 7 - When the demand for high fire (second stage) heat switches to open. Reset manual flame rollout is satisfied, the combustion air inducer is switched switches on burner box assembly if necessary. to the low-fire heating speed and the high-fire (second stage) gas valve is de-energized. The Heating Sequence of Operation low-fire (first stage) gas valve continues operation. The indoor blower motor is switched to the low-fire Electronic Ignition heating speed. The two-stage, variable speed integrated control used in 8 - When the thermostat demand for low-fire (first stage) heat is satisfied, the gas valve is de- EL297UHV units has an added feature of an internal energized and the field-selected indoor blower off Watchguard control. The feature serves as an automatic delay begins. The combustion air inducer begins a reset device for ignition control lockout caused by ignition 5-second post-purge period. failure. After one hour of continuous thermostat demand 9 - When the combustion air post-purge period is for heat, the Watchguard will break and remake thermo- complete, the inducer and the HUM contacts are stat demand to the furnace and automatically reset the de-energized. The indoor blower is de-energized at control to begin the ignition sequence. the end of the off delay as well as the 120V ACC NOTE - The ignition control thermostat selection DIP terminals. switch is factory-set in the â€œTWO-STAGEâ€ position. Page 65 Applications Using A Single-Stage Thermostat 4 - After the 20-second warm-up period has ended, See Figure 68 for ignition control sequence the gas valve is energized on low fire (first stage) and ignition occurs. At the same time, the control B - Heating Sequence -- Integrated Control Thermostat module sends a signal to begin an indoor blower Selection DIP Switch 1 ON in â€œSingle-Stageâ€ Position 30-second ON-delay. When the delay ends, the NOTE - In these applications, two-stage heat will be initi- indoor blower motor is energized on the low fire ated by the integrated control if heating demand has not heating speed and the HUM contacts are energized. been satisfied after the field adjustable period (7 or 12 The integrated control also initiates a second-stage minutes). on delay (factory-set at 7 minutes; adjustable to 12 1 - On a call for heat, thermostat first-stage contacts minutes). close sending a signal to the integrated control. The 5 - If the heating demand continues beyond the integrated control runs a self-diagnostic program secondstage on delay, the integrated control and checks high temperature limit switches for energizes the combustion air inducer at high speed. normally closed contacts and pressure switches for The control also checks the high fire (second stage) normally open contacts. The combustion air inducer pressure switch to make sure it is closed. The high is energized at low speed. fire (second stage) gas valve is energized and the 2 - Once the control receives a signal that the low indoor blower motor is energized for operation at pressure switch has closed, the combustion air the high fire heating speed. inducer begins a 15-second pre-purge in low speed. 6 - When the thermostat heating demand is satisfied, NOTE - If the low fire pressure switch does not close the combustion air inducer begins a 5-second low the combustion air inducer will switch to high fire. speed post-purge. The field-selected indoor blower After a 15 second pre-purge the high fire pressure off delay begins. The indoor blower operates at the switch will close and the unit will begin operation on low-fire heating speed. high fire. After 10 to 20 seconds of high fire opera- 7 - When the combustion air post-purge period is tion the unit will switch to low fire. complete, the inducer and the HUM contacts are 3 - After the pre-purge is complete, a 20-second initial de-energized. The indoor blower is de-energized at ignitor warm-up period begins. The combustion air the end of the off delay as well as the 120V ACC inducer continues to operate at low speed. terminals. HEATING OPERATION WITH TWO-STAGE THERMOSTAT 1 15 35 39 80 5 SEC 30* second blower ON Pre-Purge Trial For blower Post â€œoffâ€ OFF Ignitor Warm-up Ignition â€œonâ€ delay Purge delay 1 stg heat demand low speed CAI ignitor low fire gas valve indoor blower low heat 2 stg heat demand 30 seconds RECOGNITION PERIOD high speed CAI high fire gas valve indoor blower high heat * Conventional thermostat 30 seconds, communicating thermostat set for 30 adjustable 15 to 45 seconds. Figure 67 HEATING OPERATION WITH SINGLE STAGE THERMOSTAT 1 15 35 39 80 5 SEC 30* second blower ON Pre-Purge Ignitor Warm-up Trial For blower Post â€œoffâ€ OFF Ignition â€œonâ€ delay Purge delay heat demand low speed CAI ignitor low fire gas valve indoor blower low heat 7 or 12 minutes after heating demand begins, furnace switches to high fire (depends on setting) high speed CAI high fire gas valve indoor blower high heat * Conventional thermostat 30 seconds, communicating thermostat set for 30 adjustable 15 to 45 seconds. Figure 68 Page 66 9 - Ensure sufficient combustion air is available to the Service furnace. Fresh air grilles and louvers (on the unit and in the room where the furnace is installed) WARNING must be properly sized, open and unobstructed to provide combustion air. ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD. 10 - Inspect the furnace intake and exhaust pipes to make sure they are in place, structurally sound, Failure to follow safety warnings exactly could result in without holes, blockage or leakage and the dangerous operation, serious injury, death or property exhaust pipe is sloped toward the furnace. Inspect damage. terminations to ensure they are free of obstructions Improper servicing could result in dangerous operation, and are structurally sound. Inspect the furnace serious injury, death, or property damage. Before return air duct connection to ensure the duct is servicing, disconnect all electrical power to furnace. sealed to the furnace. Check for air leaks on supply and return ducts and seal where necessary. When servicing controls, label all wires prior to disconnecting. Take care to reconnect wires correctly. 11 - Inspect the furnace return air duct connection to Verify proper operation after servicing. ensure the duct is sealed to the furnace. Check for air leaks on supply and return ducts and seal where WARNING necessary. 12 - Check the condition of the furnace cabinet insulation The blower access panel must be securely in place when and repair if necessary. the blower and burners are operating. Gas fumes, which 13 - Perform a complete combustion analysis during the could contain carbon monoxide, can be drawn into living furnace inspection to ensure proper combustion space resulting in personal injury or death. and operation. Consult Service Literature for proper combustion values. Annual Furnace Maintenance 14 - Verify operation of CO detectors and replace At the beginning of each heating season, and to comply batteries as required. with the Lennox Limited Warranty, your system should Perform a general system test. Turn on the furnace to be checked as follows: check operating functions such as the start-up and shut- 1 - Check wiring for loose connections, voltage at off operation. indoor unit and amperage of indoor motor. 1 - Check the operation of the ignition system, inspect 2 - Check the condition of the belt and shaft bearings and clean flame sensor. Check microamps before if applicable. and after. Check controls and safety devices (gas 3 - Inspect all gas pipe and connections for leaks. valve, flame sensor, temperature limits). Consult 4 - Check the cleanliness of filters and change if Service Manual for proper operating range. Thermal necessary (monthly). Limits should be checked by restricting airflow and not disconnecting the indoor blower. For additional 5 - Check the condition and cleanliness of burners and details, please see Service and Application Note heat exchanger and clean if necessary. H049. 6 - Check the cleanliness of blower assembly and 2 - Verify that system total static pressure and airflow clean the housing, blower wheel and blower motor settings are within specific operating parameters. if necessary. 3 - Clock gas meter to ensure that the unit is operating 7 - Inspect the condensate drain and trap for leaks and at the specified firing rate for each stage of cracks. The drain and trap must also be cleaned operation. Check the supply pressure and the and the trap must be primed with water. Inspect the manifold pressure on both low fire and high fire. If rubber hoses connected to the pressure switches for manifold pressure adjustment is necessary, consult cracks or loose connections, replace as necessary. the Service Literature for unit specific information Remove the rubber hoses from the cold end header on adjusting gas pressure. Not all gas valves are box and inspect for any blockage, clean as needed. adjustable. Verify correct temperature rise. If strainers are installed in the hoses remember to remove and clean before reinstalling the hoses. 8 - Evaluate the heat exchanger integrity by inspecting the heat exchanger per the AHRI heat exchanger inspection procedure. This procedure can be viewed at www.ahrinet.org. Page 67 Winterizing and Condensate Trap Care 7 - Use the soft brush attachment on a vacuum cleaner to gently clean the face of the burners. Visually 1 - Turn off power to the furnace. inspect the inside of the burners and crossovers for 2 - Have a shallow pan ready to empty condensate any blockage caused by foreign matter. Remove water. any blockage. 3 - Remove the clean out cap from the condensate trap 8 - Reinstall the burner box assembly using the existing and empty water. Inspect the trap then reinstall the four screws. Make sure that the burners line up in clean out cap. the center of the burner ports. Cleaning The Burner Assembly 9 - Reconnect the sensor wire and reconnect the 2-pin plug to the ignitor wiring harness. Reconnect wires If cleaning the burner assembly becomes necessary, fol- to flame rollout switches. low the steps below: 10 - Reinstall the gas valve manifold assembly. 1 - Turn off electrical and gas power supplies to furnace. Reconnect the gas supply line to the gas valve. Remove upper and lower furnace access panels. Reinstall the burner box cover. 2 - Disconnect the wires from the gas valve. 11 - Reconnect wires to gas valve. 3 - Remove the burner box cover (if equipped). 12 - Replace the blower compartment access panel. 4 - Disconnect the gas supply line from the gas valve. 13 - Refer to instruction on verifying gas and electrical Remove gas valve/manifold assembly. connections when re-establishing supplies. 5 - Mark and disconnect sensor wire from the sensor. 14 - Follow lighting instructions to light and operate Disconnect wires from flame rollout switches. furnace for 5 minutes to ensure that heat exchanger 6 - Disconnect combustion air intake pipe. It may be is clean and dry and that furnace is operating necessary to cut the existing pipe to remove burner properly. box assembly. 15 - Replace heating compartment access panel. Remove four screws which secure burner box assembly to vest panel. Remove burner box from the unit. Page 68 Program Unit Capacity/Size Mode Power-Up - Number displayed represents by integrated control unit size code (furnace model âˆ’âˆ’ and capacity). If three horizontal bars are displayed followed by continuous E203, furnace âˆ’ control does not recognize unit size code. Configure per the following: Furnace control in IDLE mode Yes No heating, cooling or indoor fan No operation) To enter Program Unit Capacity/Size: push and hold button next to _ 7-segment LED display Turn room thermostat to OFF until solid â€œPâ€ symbol appears. Release button. IMPORTANT: Field replacement controls may need to be manually configured to validate furnace unit size code. UNIT SIZE CODE FURNACE MODEL 0 EL297UH045V36B 1 EL297UH070V36B 2 EL297UH090V36C Solid P starts 3 EL297UH09048C blinking on P 4 EL297UH090V60C 7-Segment LED 5 EL297UH110V48C 6 EL297UH110V60C 7 EL297UH135V60D Push and hold button. Integrated control will display unit size code number for each When the correct unit size code is displayed, release furnace model for three seconds. button. Selected code will flash for 10-second period. During that period, press and hold push button for 5 seconds. Integrated control will store code in memory and will automatically exit Program Unit Capacity/Size Mode and reset. (If second period expires or push button is held less than five seconds, control will automatically exit Program Capacity/Size Mode and go into IDLE mode without storing unit size code. If this happens, programming function must be repeated). âˆ’âˆ’ Verify that the selected unit size code is correct âˆ’ and stored in non-volatile memory by cycling the 24 volt power to the furnace control. (At 24 volt power-up of the furnace control, the 7-segment LED will display a unit size code. If three horizontal bars display, board does not recognize unit size code. Programming function must be repeated) FINISHED Page 69 Requirements for Commonwealth of Massachusetts Modifications to NFPA-54, Chapter 10 4 - INSPECTION. The state or local gas inspector Revise NFPA-54 section 10.8.3 to add the following of the side wall, horizontally vented, gas-fueled requirements: equipment shall not approve the installation unless, upon inspection, the inspector observes carbon For all side wall, horizontally vented, gas-fueled equip- monoxide detectors and signage installed in ment installed in every dwelling, building or structure used accordance with the provisions of 248 CMR 5.08(2) in whole or in part for residential purposes, including those (a) 1 through 4. owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) EXEMPTIONS: The following equipment is exempt- feet above the finished grade in the area of the venting, in- from 24 CMR 5.08(2)(a) 1 through 4: cluding but not limited to decks and porches, the following 1 - The equipment listed in Chapter 10 entitled requirements shall be satisfied: â€œEquipment Not Required to Be Ventedâ€ in the most 1 - INSTALLATION OF CARBON MONOXIDE current edition of NFPA 54 as adopted by the Board; DETECTORS. At the time of installation of the side and wall, horizontally vented, gas-fueled equipment, 2 - Product Approved side wall, horizontally vented, the installing plumber or gasfitter shall observe that gasfueled equipment installed in a room or structure a hard-wired carbon monoxide detector with an separate from the dwelling, building or structure alarm and battery backup is installed on the floor used in whole or in part for residential purposes. level where the gas equipment is to be installed. MANUFACTURER REQUIREMENTS - GAS EQUIP- In addition, the installing plumber or gasfitter shall MENT VENTING SYSTEM PROVIDED. observe that a battery-operated or hard-wired When the manufacturer of Product Approved side wall, carbon monoxide detector with an alarm is installed horizontally vented, gas-fueled equipment provides a on each additional level of the dwelling, building or venting system design or venting system components structure served by the side wall, horizontally vented, with the equipment, the instructions provided by the man- gas-fueled equipment. It shall be the responsibility ufacturer for installation of the equipment and the venting of the property owner to secure the services of system shall include: qualified licensed professionals for the installation of hard-wired carbon monoxide detectors. 1 - Detailed instructions for the installation of the venting system design or the venting system components: a. I n the event that the side wall, horizontally vented, gas-fueled equipment is installed in a crawl space or an attic, the hard- and wired carbon monoxide detector with alarm and battery 2 - A complete parts list for the venting system design back-up may be installed on the next adjacent floor level. or venting system. b. In the event that the requirements of this subdivision cannot MANUFACTURER REQUIREMENTS - be met at the time of completion of installation, the owner GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED. shall have a period of thirty (30) days to comply with the above requirements; provided, however, that during said When the manufacturer of Product Approved side wall, thirty (30) day period, a battery-operated carbon monoxide horizontally vented, gas-fueled equipment does not pro- detector with an alarm shall be installed. vide the parts for venting the flue gases, but identifies â€œspecial venting systems,â€ the following requirements 2 - APPROVED CARBON MONOXIDE shall be satisfied by the manufacturer: DETECTORSach carbon monoxide detector as required in accordance with the above provisions 1 - The referenced â€œspecial venting systemâ€ instructions shall comply with NFPA 720 and be ANSI/UL 2034 shall be included with the appliance or equipment listed and IAS certified. installation instructions; and 3 - SIGNAGE. A metal or plastic identification plate 2 - The â€œspecial venting systemsâ€ shall be Product shall be permanently mounted to the exterior of the Approved by the Board, and the instructions for building at a minimum height of eight (8) feet above that system shall include a parts list and detailed grade directly in line with the exhaust vent terminal installation instructions. for the horizontally vented, gas-fueled heating A copy of all installation instructions for all Product appliance or equipment. The sign shall read, in print Approved side wall, horizontally vented, gas-fueled size no less than one-half (1/2) inch in size, â€œGAS equipment, all venting instructions, all parts lists for VENT DIRECTLY BELOW. KEEP CLEAR OF ALL venting instructions, and/or all venting design instruc- OBSTRUCTIONS tions shall remain with the appliance or equipment at the completion of the installation. Page 70 ADDENDUM FOR ALL PROVINCES OF CANADA See below for venting in all provinces of Canada. Lennox approves the following termination for use in all provinces of Canada. C D B 12â€ A 2â€ (51MM) 3â€ (76MM) Vent Pipe Vent Pipe A âˆ’ Clearance above grade or average snow accumulation 12â€ (305 mm) Min. 12â€ (305 mm) Min. B âˆ’ Horizontal separation between 6â€ (152 mm) Min. 6â€ (152 mm) Min. intake and exhaust 24â€ (610 mm) Max. 24â€ (610 mm) Max. C âˆ’ Exhaust pipe length Per: Saskatchewan Code of Practice D âˆ’ Wall support distance from top 6â€ (152 mm) Max. 6â€ (152 mm) Max. of each pipe (intake/exhaust) NOTE âˆ’ Flue gas may be acidic and may adversely affect some building materials. If flue gases impinge on the building materials, a corrosionâˆ’resistant shield should be used to protect the wall surface. The shield should be constructed using wood, sheet metal or other suitable material. All seams, joints, cracks, etc. in affected area, should be sealed using an appropriate sealant. Page 71 TABLE 23 Allowable Heating Speeds EL297UH -18% -12% -6% Default +6% +12% +18% +24% Model 045XV36B 070XV36B 090XV36C Allowed Allowed 090XV48C Factory Allowed Alloweed Allowed Allowed Allowed 090XV60C Setting 110XV48C Not Allowed Not Allowed 110XV60C Allowed Allowed 135XV60D Not Allowed Not Allowed TABLE 24 Allowable Circulation Speeds 28% 38% EL297UH Model Number (second stage cool) (second stage cool) All Models Allowed Factory Setting FOR THE PROVINCE OF ONTARIO, HORIZONTAL SIDEWALL VENT APPLICATIONS ONLY For exterior horizontal venting applications, the 2â€ X 1.5â€ reducer for 2â€ venting at the point where the exhaust pipe exits the structure is not required in direct or nondirect vent applications in the Province of Ontario. In these applications, the vent should be oriented such that the exhaust plume is unobjectionable. If the installation requires more separation be- tween the flue gases and the building structure, a reducer may be installed on the exhaust pipe to increase the flue gas velocity. Page 72 Start-Up & Performance Check List UNIT SET UP (typical) Furnace: Model Number_______________ Serial Number_________________ SUPPLY AIR Line Voltage 2 4 1 GAS SUPPLY Natural Gas LP Propane Gas 3 Piping Connections Tight Leak Tested Flter 2 Supply Line Pressure â€œW.C.________ RETURN AIR 1 Gas Supply Pressure 1 3 DUCT SYSTEM SUPPLY AIR DUCT Sealed 2 INTAKE / EXHAUST PIPE Insulated (if necessary) All Joints Primed and Glued RETURN DUCT Terminations Installed Properly Sealed Horizontal Pipes Sloped (if applicable) Filter Installed and Clean Condensate Trap Primed / Line Sloped Grilles Unobstructed Pipes Supported 4 VOLTAGE CHECK Heat Cable Installed and Operable (if applicable) Supply Voltage _____ Electrical Connections Tight Page 73 UNIT OPERATION HEATING MODE COOLING MODE 1 GAS MANIFOLD PRESSURE â€œW.C._____ 3 INDOOR BLOWER AMPS______ 2 COMBUSTION SAMPLE CO2%______CO PPM_______ 4 TEMPERATURE DROP Return Duct Temperature _________ 3 INDOOR BLOWER AMPS______ _ Supply Duct Temperature _______ Temperature Drop = _________ 4 TEMPERATURE RISE Supply Duct Temperature ________ 5 TOTAL EXTERNAL STATIC (dry coil) Return Duct Temperature _ _____ Supply External Static _______ Return External Static + ______ Temperature Rise = ________ Total External Static = _______ 5 TOTAL EXTERNAL STATIC 8 DRAIN LINE Supply External Static _______ Leak Free Return External Static + ______ Total External Static = _______ 6 CONDENSATE LINE 9 THERMOSTAT Adjusted and Programmed Leak Free Explained Operation to Owner 7 VENT PIPE Leak Free Combustion CO2 2 7 SUPPLY AIR Thermostat 8 Temperatures Gas Manifold Pressure 9 4 1 Blower Motor Amps 6 3 Duct Static High + 5 RETURN AIR Low - Contractor's: Name_________________________Telephone_____________Checklist Completed____________________ Job Address_____-________________________________Technician's Name___________________________________ Page 74 ! 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