HomeMy WebLinkAbout222 Joann Ln_BLD5995_2025 Permit Packet Coversheet
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City of Arlington • 18204 59th Avenue NE • Arlington, WA 98223 • Phone (360) 403-3551
Permit Number: BLD5995 Permit Type: Residential Mechanical
Address/Parcel: 222 Joan Ln Completed (Month/Year): July 2024
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DAIKIN ROOM AIR CONDITIONER Español
INSTALLATION MANUAL
R410A Split Series
Installation manual
Manuel dinstallation
Manual de instalación
MODELS
5MXS48TVJU
4MXL36TVJU
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Contents
Safety Considerations .................................... 1 3. Flaring the pipe end ..................................................... 8
4. Refrigerant piping ........................................................ 9
Accessories ..................................................... 3
5. Pressure test and evacuating system .......................... 10
Precautions for Selecting a Location ........... 3 6. Refilling refrigerant ...................................................... 11
7. Charging with refrigerant ............................................. 11
Precautions on Installation ............................ 4
Wiring ............................................................... 12
Outdoor Unit Installation Diagram ................ 4
Priority Room Setting ..................................... 14
Installation Space Requirements .................. 5
Night Quiet Mode setting ............................... 15
Selecting a Location for Installation of the
Indoor Units ..................................................... 5 COOL/HEAT mode lock [S15] ........................ 15
Connections (connection port) ..................... 6 Pump Down Operation ................................... 16
How to Use Reducers ..................................... 7 Trial Operation and Testing ............................ 17
1. Wiring error check ...................................................... 17
Outdoor Unit Installation ................................ 8
2. Trial operation and testing ........................................... 18
1. Installing the outdoor unit ........................................... 8
3. Test items .................................................................... 18
2. Drain work ................................................................... 8
Safety Considerations
Read these Safety Considerations for Installation carefully • If refrigerant gas leaks during installation, ventilate the
before installing an air conditioner or heat pump. After completing area immediately. Refrigerant gas may produce toxic gas
the installation, make sure that the unit operates properly during if it comes into contact with fire. Exposure to this gas could
the startup operation. cause severe injury or death.
Instruct the user on how to operate and maintain the unit.
• After completing the installation work, check that the
Inform users that they should store this installation manual with
refrigerant gas does not leak throughout the system.
the operation manual for future reference.
Always use a licensed installer or contractor to install this product. • Do not install unit in an area where flammable materials
Improper installation can result in water or refrigerant leakage, are present due to risk of explosions that can cause
electric shock, fire, or explosion. serious injury or death.
Meanings of DANGER, WARNING, CAUTION, and NOTE • Safely dispose all packing and transportation materials
Symbols: in accordance with federal/state/local laws or ordinances.
Packing materials such as nails and other metal or
DANGER ........... Indicates an imminently hazardous wood parts, including plastic packing materials used for
situation which, if not avoided, will
transportation may cause injuries or death by suffocation.
result in death or serious injury.
WARNING ......... Indicates a potentially hazardous
situation which, if not avoided, could WARNING
result in death or serious injury.
• Only qualified personnel must carry out the installation
CAUTION .......... Indicates a potentially hazardous
work. Installation must be done in accordance with this
situation which, if not avoided, may
installation manual. Improper installation may result in
result in minor or moderate injury.
water leakage, electric shock, or fire.
It may also be used to alert against
unsafe practices. • When installing the unit in a small room, take measures
NOTE ................ Indicates situations that may result to keep the refrigerant concentration from exceeding
in equipment or property-damage allowable safety limits. Excessive refrigerant leaks, in the
accidents only. event of an accident in a closed ambient space, can lead
to oxygen deficiency.
DANGER • Use only specified accessories and parts for installation
work. Failure to use specified parts may result in water
• Refrigerant gas is heavier than air and replaces oxygen.
leakage, electric shock, fire, or the unit falling.
A massive leak can lead to oxygen depletion, especially
in basements, and an asphyxiation hazard could occur • Install the air conditioner or heat pump on a foundation
leading to serious injury or death. strong enough that it can withstand the weight of the unit.
A foundation of insufficient strength may result in the unit
• Do not ground units to water pipes, gas pipes, telephone
falling and causing injuries.
wires, or lightning rods as incomplete grounding can cause
a severe shock hazard resulting in severe injury or death. • Take into account strong winds, typhoons, or earthquakes
Additionally, grounding to gas pipes could cause a gas leak when installing. Improper installation may result in the unit
and potential explosion causing severe injury or death. falling and causing accidents.
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• Make sure that a separate power supply circuit is provided (b) Tight -- R410A does not contain any chlorine, does not
for this unit and that all electrical work is carried out by destroy the ozone layer, and does not reduce the earth’s English
qualified personnel according to local, state, and national protection again harmful ultraviolet radiation. R410A
regulations. An insufficient power supply capacity or can contribute to the greenhouse effect if it is released.
improper electrical construction may lead to electric shock Therefore take proper measures to check for the tightness
or fire. of the refrigerant piping installation. Read the chapter
Refrigerant Piping Work and follow the procedures.
• Make sure that all wiring is secured, that specified wires
are used, and that no external forces act on the terminal • Since R410A is a blend, the required additional refrigerant
connections or wires. Improper connections or installation must be charged in its liquid state. If the refrigerant is
may result in fire. charged in a state of gas, its composition can change and
the system will not work properly.
• When wiring, position the wires so that the electrical
wiring box cover can be securely fastened. Improper • The indoor unit is for R410A. See the catalog for indoor
positioning of the electrical wiring box cover may result in models that can be connected. Normal operation is not
electric shock, fire, or the terminals overheating. possible when connected to other units.
• Before touching electrical parts, turn off the unit. • Remote controller (wireless kit) transmitting distance can be
shorter than expected in rooms with electronic fluorescent
• The circuit must be protected with safety devices in
lamps (inverter or rapid start types). Install the indoor unit
accordance with local and national codes, i.e. a circuit
far away from fluorescent lamps as much as possible.
breaker.
• Indoor units are for indoor installation only. Outdoor units can be
• Securely fasten the outdoor unit terminal cover (panel). If the
installed either outdoors or indoors.
terminal cover/panel is not installed properly, dust or water
may enter the outdoor unit causing fire or electric shock. • Do not install the air conditioner or heat pump in the
following locations:
• When installing or relocating the system, keep the refrigerant
(a) Where a mineral oil mist or oil spray or vapor is
circuit free from substances other than the specified
produced, for example, in a kitchen.
refrigerant (R410A) such as air. Any presence of air or other
Plastic parts may deteriorate and fall off or result in
foreign substance in the refrigerant circuit can cause an
water leakage.
abnormal pressure rise or rupture, resulting in injury.
(b) Where corrosive gas, such as sulfurous acid gas, is
• Do not change the setting of the protection devices. If the produced.
pressure switch, thermal switch, or other protection device Corroding copper pipes or soldered parts may result in
is shorted and operated forcibly, or parts other than those refrigerant leakage.
specified by Daikin are used, fire or explosion may occur. (c) Near machinery emitting electromagnetic waves.
Electromagnetic waves may disturb the operation of
the control system and cause the unit to malfunction.
CAUTION
(d) Where flammable gas may leak, where there is carbon
fiber, or ignitable dust suspension in the air, or where
• Do not touch the switch with wet fingers. Touching a switch volatile flammables such as thinner or gasoline are handled.
with wet fingers can cause electric shock. Operating the unit in such conditions can cause a fire.
• Do not allow children to play on or around the unit to • Take adequate measures to prevent the outdoor unit
prevent injury. from being used as a shelter by small animals. Small
• The heat exchanger fins are sharp enough to cut. To avoid animals making contact with electrical parts can cause
injury wear gloves or cover the fins while working around malfunctions, smoke, or fire. Instruct the user to keep the
them. area around the unit clean.
• Do not touch the refrigerant pipes during and immediately
after operation as the refrigerant pipes may be hot or NOTE
cold, depending on the condition of the refrigerant flowing
through the refrigerant piping, compressor, and other • The outdoor unit should be positioned where the unit and power
refrigerant cycle parts. Your hands may suffer burns or supply wires (breaker panel to outdoor unit) are at least 10ft (3m)
frostbite if you touch the refrigerant pipes. To avoid injury, away from any televisions or radios. (The unit may cause interference
give the pipes time to return to normal temperature or, if with the picture or sound.) Depending on the radio waves, a distance
you must touch them, be sure to wear proper gloves. of 10ft (3m) may not be sufficient to eliminate the noise.
• Install drain piping to ensure proper drainage. Improper drain • Dismantling the unit, treatment of the refrigerant, oil and
piping may result in water leakage and property damage. additional parts must be done in accordance with the
• Insulate piping to prevent condensation. relevant local, state, and national regulations.
• Be careful when transporting the product. • Do not use the following tools that are used with
conventional refrigerants: gauge manifold, charge hose, gas
• Do not turn off the power immediately after stopping
leak detector, reverse flow check valve, refrigerant charge
operation. Always wait for at least 5 minutes before turning
base, vacuum gauge, or refrigerant recovery equipment.
off the power. Otherwise, water leakage may occur.
• If the conventional refrigerant and refrigerator oil are
• Do not use a charging cylinder. Using a charging cylinder
mixed in R410A, the refrigerant may deteriorate.
may cause the refrigerant to deteriorate.
• This air conditioner or heat pump is an appliance that
• Refrigerant R410A in the system must be kept clean, dry,
should not be accessible to the general public.
and tight.
• As design pressure is 604 psi, the wall thickness of field-
(a) Clean and Dry -- Foreign materials (including mineral installed pipes should be selected in accordance with the
oils such as SUNISO oil or moisture) should be relevant local, state, and national regulations.
prevented from getting into the system. RN003-U
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Accessories
B Drain socket C Drain socket cap
A Installation manual 1 1 1
D Drain plug E Reducer assy
9 1 F Warranty 1
Precautions for Selecting a Location
1) Choose a place solid enough to bear the weight and vibration of the unit, where the operating sound will not be amplifi ed.
2) Choose a location where the air discharged from the unit or the operating sound will not cause a nuisance to the neighbors of
the user.
3) Avoid locations, such as near bedrooms, where the operating sound may cause disturbance.
4) There must be suffi cient space to carry the unit into and out of the site.
5) There must be suffi cient space for air passage and no obstructions around the air inlet and the air outlet.
6) The site must not be prone to fl ammable gas leaks in the surrounding area.
7) In coastal areas or other places with a salty atmosphere or one containing sulphate gas, corrosion may shorten the life of the
air conditioner.
8) Since water will fl ow from the drain of the outdoor unit, do not place under the unit anything which must be kept away from
moisture.
NOTE
Cannot be installed suspended from a ceiling or stacked.
CAUTION
When operating the air conditioner in a low outdoor ambient temperature, be sure to
follow the instructions described below. • Construct a large canopy.
• To prevent exposure to wind, install the outdoor unit with its suction side facing the • Construct a pedestal.
wall.
• Never install the outdoor unit at a site where the suction side may be exposed
directly to wind.
• To prevent exposure to wind, it is recommended to install a baffl e plate on the air
discharge side of the outdoor unit.
• In heavy snow areas, select an installation site where the snow will not affect the
unit.
• If there is a likelihood of snow accumulating on the outdoor unit, attach a snow Install the unit high enough off
the ground to prevent burying
protection hood. in snow.
• In high humidity areas or heavy snow areas, it is recommended to attach a drain
pan heater to prevent ice build-up from the bottom frame.
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Precautions on Installation
• Check the strength and level of the installation surface so that the unit does not cause
any operating vibrations or noise after installation.
English
• Fix the unit in place securely using foundation bolts, as in the figure. (Prepare 4 sets of
1/2 inch (M12) foundation bolts, nuts and washers; all sold separately.) 3/4â€(20mm)
• It is best to screw in the foundation bolts until their ends are 3/4 inch (20mm) from the
foundation surface.
Outdoor Unit Installation Diagram
CAUTION
• Do not connect the embedded branch piping and the outdoor unit when only carrying out piping work without connecting the
indoor unit in order to add another indoor unit later.
Make sure no dirt or moisture gets into either side of the embedded branch piping.
Refer to “4. Refrigerant piping†on page 9 for details.
• It is not possible to have only 1 indoor unit connected. Be sure to connect at least 2 or more indoor units.
Wrap the insulation pipe
Refrigerant piping must be protected from physical with ï¬nishing tape from
damage. bottom to top.
Install a plastic cover or equivalent.
Allow 11-13/16†(300mm) of work
space below the ceiling surface.
Top plate Allow space for piping
and electrical servicing.
9-13/16 (250) from wall
Shield cover
If there is a danger of the unit
falling or overturning, ï¬x the unit
with foundation bolts, or with
wire or other means.
Right side plate
In sites with poor drainage, use
block bases for the outdoor unit.
Adjust foot height until the unit is
level. Otherwise, water leakage
or pooling of water may occur.
19-1/4 (488)(Foot bolt-hole
29-1/8 (740) centers)
(Foot bolt-hole centers) 7-1/16 (180)
unit : inch (mm)
Also insulate the connection on the outdoor unit.
Clamping material
Use tape or insulating material on all connections to prevent air
Insulation tube from getting in between the copper piping and the insulation
tube.
Tape Be sure to do this if the outdoor unit is installed at a higher
Right side plate
elevation than are any of the indoor units connected to it.
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Installation Space Requirements
• Position the unit on a horizontal surface. Any tilt in the unit should be 3° or less to the horizontal.
• Where a wall or other obstacle is in the path of outdoor unit’s intake or exhaust airflow, follow the installation space requirements
below.
• For any of the below installation patterns, the wall height on the outlet side should be 47-1/4 inch (1200mm) or less.
Wall facing one side Walls facing two sides
More than More than
3-15/16 (100) 13-3/4 (350)
More than More than
More 3-15/16 (100) 13-3/4
than (350)
47-1/4
3-15/16
(1200) More than
(100)
or less 13-3/4 (350)
More than More than
1-15/16 (50) 1-15/16 (50)
Side view Top view
Walls facing three sides
When installed as in the ï¬gure on the left, it is recommended to either
change the orientation of the outdoor unit outlet side or use the air direction
More than 3-15/16 (100) adjustment grille (sold separately).
More than
1-15/16 (50) More than 13-3/4 (350)
Top view unit: inch (mm)
Selecting a Location for Installation of
the Indoor Units
• The maximum allowable length of refrigerant piping, and the maximum allowable height difference between the outdoor and
indoor units, are listed below. (The shorter the refrigerant piping, the better the performance. Connect so that the piping is as
short as possible. Shortest allowable length per room is 10ft (3m).)
Outdoor unit capacity class 5MXS48* 4MXL36*
Piping to each indoor unit 98ft (30m) max.
Total length of piping between all units 262ft (80m) max. 230ft (70m) max.
Indoor unit
Outdoor unit Level
difference:
49-1/4ft (15m)
Level max. Level
difference: Level difference:
49-1/4ft (15m) difference: 24-5/8ft (7.5m) Outdoor unit
max. 24-5/8ft (7.5m)
max.
max.
Indoor unit
If the outdoor unit is positioned higher than the indoor units. If the outdoor unit is positioned lower than one or
more indoor units.
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Connections (connection port)
Install the indoor unit according to the table below, which shows the relationship between the class of indoor unit and the
English
corresponding port.
The total indoor unit class that can be connected to this unit:
4MXL36* – Up to 48000 Btu
5MXS48* – Up to 58000 Btu
The line set piping size is determined by the size of the indoor unit fittings.
Reducers are used at the outdoor unit to accommodate the correct gas line pipe size.
Port 4MXL36∗ 5MXS48∗
A 07 , 09, 12 07 , 09, 12
# # # # # #
B 07 , 09 , 12 , 15 , 18 07 , 09 , 12 , 15 , 18
# # # # # #
C 07 , 09 , 12 , 15 , 18 07 , 09 , 12 , 15 , 18
D 07 , 09 , 12 , 15 , 18 , 24 07 , 09 , 12 , 15 , 18 , 24
E 07 , 09 , 12 , 15 , 18 , 24
: Use a reducer to connect pipes.
# : Use No. 2 and 4 reducers
: Use No. 5 and 6 reducers
: Use No. 1 and 3 reducers
Refer to “How to Use Reducers†on page 7 for information on reducer numbers and their shapes.
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How to Use Reducers
No.1 No.2 No.3 No.4 No.5 No.6
φ5/8†φ1/2†φ5/8†φ1/2†φ5/8†φ5/8â€
φ1/2†φ3/8†φ1/2†φ3/8†φ3/8†φ3/8â€
Gasket (1) Gasket (2) Reduce and gasket
• Use the reducers supplied with the unit as described below.
(1) Connecting a pipe of φ1/2 inch (12.7mm) to a gas pipe connection port for φ5/8 inch (15.9mm) :
No. 1 Inter-unit piping
Be sure to attach No. 3 Flare nut (for φ5/8 inch (15.9mm))
the gasket.
Connection port of outdoor unit
(2) Connecting a pipe of φ3/8 inch (9.5mm) to a gas pipe connection port for φ5/8 inch (15.9mm) :
Flare nut (for φ3/8 inch (9.5mm))
No. 6 No. 5
Be sure to attach the gasket.
Connection port of outdoor unit
(3) Connecting a pipe of φ3/8 inch (9.5mm) to a gas pipe connection port for φ1/2 inch (12.7mm) :
No. 2 No. 4 Flare nut (for φ1/2 inch (12.7mm))
Be sure to attach the gasket.
Connection port of outdoor unit
• When using the reducer packing shown above, be careful not to overtighten the nut, or the smaller pipe may become
damaged. (Apply about 2/3 to 3/3 the normal torque.)
• Apply a coat of refrigeration oil to the threaded connection port of the outdoor unit where the flare nut comes in.
• Use an appropriate wrench to avoid damaging the connection thread by overtightening the flare nut.
Piping size Flare nut tightening torque
O.D. φ3/8 inch (9.5mm) 24-1/8 – 29-1/2ft • Ibf (32.7-39.9N • m)
O.D. φ1/2 inch (12.7mm) 36-1/2 – 44-1/2ft • lbf (49.5-60.3N • m)
O.D. φ5/8 inch (15.9mm) 45-5/8 – 55-5/8ft • lbf (61.8-75.4N • m)
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Outdoor Unit Installation
1. Installing the outdoor unit English
• When installing the outdoor unit, refer to “Precautions for Selecting a Location†on page 3 and the “Outdoor Unit
Installation Diagram†on page 4.
• If drain work is necessary, follow the procedures below.
2. Drain work
CAUTION D Drain plugs
• In cold areas, do not use a drain socket, drain plugs and a drain hose with the outdoor
unit. (Drain water may freeze, impairing heating performance.)
D Drain plugs
• If the drain port is covered by a mounting base or floor surface, place additional foot B Drain
socket
bases of at least 3-15/16 inch (100mm) in height under the outdoor unit’s feet. Air outlet side
1) Insert the D drain plug into the bottom frame until it is flush with the bottom frame
around the entire circumference, as shown in area A.
B Drain socket
Area A
Drain plug insert direction Projection
Be careful not to push in Bottom frame
the drain plug too far.
2) Insert C drain socket cap onto B drain socket beyond the projection around B drain socket.
3) Insert B drain socket into the matching drain hole.
After insertion, turn it about 40° clockwise.
NOTE
Check that C drain socket cap is correctly engaged with the projection of B drain socket.
Otherwise, water leakage may result. C Drain socket cap
4) Connect the drain hose (field supplied; internal diameter of 1 inch (25mm)) to B drain
Projection
socket.
(Ensure there are no bends in the hose if it is too long or hangs down.)
5) Make sure the D drain plugs and the B drain socket of the outdoor unit are securely
inserted and there is no leakage.
3. Flaring the pipe end
WARNING
• Do not use mineral oil on flared part.
• Prevent mineral oil from getting into the system as this would reduce the service life of the units.
• Never use piping which has been used for previous installations. Only use parts which are delivered with the unit.
• Never install a dryer to this R410A unit in order to guarantee its service life.
• The drying material may dissolve and damage the system.
• Incomplete flaring may cause refrigerant gas leakage.
CAUTION
Do not reuse joints which have been used once already.
1) Cut the pipe end with a pipe cutter. Check
The pipe end must
2) Remove burrs with the cut surface facing Flare’s inner
be evenly flared in
downward so that the chips do not enter the surface must be
a perfect circle.
flaw-free.
pipe. Make sure that the
Cut exactly at
3) Put the flare nut on the pipe. right angles. Remove burrs. flare nut is ï¬tted.
4) Flare the pipe. Flaring
5) Check that the flaring is properly made. Set exactly at the position shown below.
A Flare tool for R410A Conventional flare tool
Clutch-type Clutch-type (Rigid-type) Wing-nut type (Imperial-type)
0-0.020 inch 0.039-0.059 inch 0.059-0.079 inch
Die A
(0-0.5mm) (1.0-1.5mm) (1.5-2.0mm)
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Outdoor Unit Installation
4. Refrigerant piping
CAUTION
• Use the flare nut fixed to the main unit. (This is to prevent the flare nut from cracking as a result of deterioration over time.)
• To prevent gas leakage, apply refrigeration oil only to the inner surface of the flare. (Use refrigeration oil for R410A.)
• Use a torque wrench when tightening the flare nuts to prevent damage to the flare nuts and gas leakage.
• Align the centers of both flares and tighten the flare nuts 3 or 4 turns by hand, then tighten them fully with a spanner and a
torque wrench.
Apply oil Tighten
Apply refrigeration Torque wrench
Do not apply refrigeration
oil only to the inner
oil to the outer surface.
surface of the flare.
Flare nut
Spanner
Do not apply refrigeration oil to
the flare nut to avoid tightening Piping union
with excessive torque. Flare nut
Piping size Flare nut tightening torque
O.D. φ3/8 inch (9.5mm) 24-1/8 – 29-1/2ft • Ibf (32.7-39.9N • m)
Gas pipe O.D. φ1/2 inch (12.7mm) 36-1/2 – 44-1/2ft • lbf (49.5-60.3N • m)
O.D. φ5/8 inch (15.9mm) 45-5/8 – 55-5/8ft • lbf (61.8-75.4N • m)
Liquid pipe O.D. φ1/4 inch (6.4mm) 10-1/2 – 12-3/4ft • lbf (14.2-17.2N • m)
Width across flats 3/4 inch (19mm) 7/8 inch (22mm)
12-5/8–15-3/8ft • lbf 16-1/4–19-7/8ft • lbf
Valve cap tightening torque
(17.0-21.0N • m) (22.0-27.0N • m)
8 –10-7/8ft • lbf
Service port cap tightening torque
(10.7-14.7N • m)
Cautions on pipe handling Wall
• Protect the open end of the pipe from dust and moisture. Be sure to
place a cap.
• All pipe bends should be as gentle as possible. Use a pipe bender for Rain
bending. If no flare cap is
available, cover
the flare mouth
with tape to keep
dirt and water out.
Selection of copper and heat insulation materials Gas pipe
When using commercial copper pipes and fittings, observe the following: Liquid pipe
• Insulation material: Polyethylene foam
• Heat transfer rate: 0.041 to 0.052W/mK (0.024 to 0.030Btu/fth°F
(0.035 to 0.045kcal/mh°C))
Be sure to use insulation that is designed for use with HVAC Systems. Gas pipe Liquid pipe
• Be sure to insulate both the gas and liquid piping and observe the insulation insulation insulation
dimensions as below. Finishing tape Drain hose
Thermal insulation
Piping size Minimum bend radius Piping thickness Thermal insulation size
thickness
O.D. 3/8 inch 1-3/16 inch (30mm) I.D. 15/32-19/32 inch
(9.5mm) or more 0.031 inch (0.8mm) (12-15mm)
O.D. 1/2 inch 1-9/16 inch (40mm) (C1220T-O) I.D. 9/16-5/8 inch
Gas side
(12.7mm) or more (14-16mm) 13/32 inch
O.D. 5/8 inch 1-15/16 inch (50mm) 0.039 inch (1.0mm) I.D. 5/8-13/16 inch (10mm) Min.
(15.9mm) or more (C1220T-O) (16-20mm)
O.D. 1/4 inch 1-3/16 inch (30mm) 0.031 inch (0.8mm) I.D. 5/16-13/32 inch
Liquid side
(6.4mm) or more (C1220T-O) (8-10mm)
• Use separate thermal insulation pipes for gas and liquid refrigerant pipes.
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5. Pressure test and evacuating system English
WARNING
• Make sure that air or any matter other than refrigerant (R410A) does not get into the refrigeration cycle.
• If refrigerant gas leaks should occur, ventilate the room as soon and as much as possible.
• R410A, as well as other refrigerants, should always be recovered and never be released directly into the environment.
• Use a vacuum pump for R410A exclusively. Using the same vacuum pump for different refrigerants may damage the vacuum
pump or the unit.
CAUTION
It is highly recommended that you do not open/close the stop valves when the outdoor temperature is below −5°F (−21°C) as
this may result in refrigerant leakage.
• When piping work is complete, it is necessary to perform a pressure test Low-pressure valve
and evacuate system with a vacuum pump. Compound
pressure gauge
• If using additional refrigerant, perform air purging from the refrigerant Service port
Gas
Pressure meter
pipes and indoor unit using a vacuum pump, then charge additional stop
refrigerant. valve High-pressure
• Use a hexagonal wrench (3/16 inch (4mm)) to operate the stop valve rods. valve
• All refrigerant pipe joints should be tightened with a torque wrench to the Gauge
specified tightening torque. manifold
Liquid
Charging
stop
hoses
Valve valve
caps
Vacuum
pump
1) Pressurize the liquid pipe and gas pipe from the service ports of each stop valve to 550psi (3.8MPa) (do not pressurize
more than 550psi (3.8MPa)) for 1 hour minimum, 24 hours recommended. If there is a pressure drop, check for leaks,
make repairs and perform the pressure test again.
2) Connect the gauge manifold’s charging hose to the gas stop valve’s service port.
3) Fully open the low-pressure valve (Lo) on the gauge manifold and fully close the high-pressure valve (Hi).
(High-pressure valve will require no further operation.)
4) Evacuate system using vacuum pump to below 500 microns for 1 hour minimum.
5) Close the low-pressure valve (Lo) on the gauge manifold and stop vacuum pump.
(Maintain this condition for 4-5 minutes to make sure that the compound pressure gauge pointer does not swing back.)*1
6) Remove the valve caps from the liquid stop value and gas stop valve.
7) To open the liquid stop valve, turn the rod of the valve 90° counter-clockwise using a hexagonal wrench.
Close it after 5 seconds, and check for gas leakage.
Using soapy water, check for gas leakage from the indoor unit’s flare and outdoor unit’s flare and valve rods.
After the check is complete, wipe all soapy water off.
8) Disconnect the charging hoses from the service port for the gas stop valve, then fully open the liquid and gas stop valves.
(Do not attempt to turn the valve rods further than they can go.)
9) Tighten the valve caps and service port caps for the liquid and gas stop valves with a torque wrench to the specified
torques.
Refer to “4. Refrigerant piping†on page 9 for details.
*1 If the compound pressure gauge pointer swings back, the refrigerant may have water content or there may be a loose
pipe joint.
Check all pipe joints and retighten nuts as needed, then repeat steps 3) through 5).
â– English 10
01_EN_3P537039-1.indd 10 9/12/2018 7:37:44 PM
Outdoor Unit Installation
6. Refilling refrigerant
Check the type of refrigerant to be used on the machine nameplate.
Precautions when adding R410A
Fill from the liquid pipe in liquid form.
R410A is a mixed refrigerant, so adding it in gas form may cause the refrigerant composition to change, preventing normal
operation.
1) Before filling, check whether the cylinder has a siphon attached or not. (It should have something like “liquid filling siphon
attached†displayed on it.)
Filling a cylinder with an attached siphon Filling other cylinders
Stand the cylinder upright when ï¬lling. Turn the cylinder upside-down
when ï¬lling.
There is a siphon pipe inside, so the
cylinder need not be upside-down to
ï¬ll with liquid.
• Be sure to use the R410A tools to ensure pressure and to prevent foreign objects entering.
7. Charging with refrigerant
CAUTION
Even though the stop valve is fully closed, the refrigerant may slowly leak out; do not leave the flare nut removed for a long
period of time.
• If the total length of piping for all rooms exceeds the figure listed below, additionally charge with 0.21oz/ft (20g/m) of
refrigerant (R410A) for each additional piping length.
Outdoor unit capacity class 5MXS48∗, 4MXL36∗
Total length of piping for all rooms 131-5/8ft (40m)
• If additional refrigerant has been charged list the amount added on the nameplate on the shield cover.
11 â– English
01_EN_3P537039-1.indd 11 9/12/2018 7:37:45 PM
Wiring
WARNING English
• Do not use tapped wires, extension cords, or starburst connections, as they may cause overheating, electric shock, or fi re.
• Do not use locally purchased electrical parts inside the product. (Do not branch the power for the drain pump, etc., from the
terminal block.) Doing so may cause electric shock or fi re.
• The circuit must be protected with safety devices in accordance with local and national codes, i.e. a circuit breaker.
• Use an all-pole disconnection type circuit breaker with at least 1/8 inch (3mm) between the contact point gaps.
• When carrying out wiring, take care not to pull at the conduit.
• Do not connect the power wire to the indoor unit. Doing so may cause electric shock or fi re.
• Do not turn on the circuit breaker until all work is completed.
[Method of Mounting Conduit]
• When connecting indoor units for 3 rooms or more, open knockout holes without deforming the conduit mounting plate.
1) Remove the right side plate (7 screws).
2) Remove the shield cover (2 screws).
3) Pass wires through the conduit and secure them with a lock nut.
Shield cover
Hooks
Lock nut
Knockout holes
A
Conduit mounting plate
Conduit
Conduit
mounting plate
Right side plate
View A
â– English 12
01_EN_3P537039-1.indd 12 9/12/2018 7:37:45 PM
Wiring
[Wiring procedure] Outdoor unit Note: Take care to ensure that all wiring
1) Strip the insulation from the wire (3/4 inch (20mm)). Room Room Room power between indoor unit and outdoor unit has a
E C A supply consistent connection. Any splices can cause
2) Connect the inter-unit wires between the indoor and communication errors.
outdoor units so that the terminal numbers match. Room Room : The Room A and Room B terminal
D B blocks, as well as the Room C and Room D
Tighten the terminal screws securely. It is recommended terminal blocks, are actually integrated.
that a slot-head screwdriver be used to tighten the screws.
Follow local codes for wiring and
60Hz
3) Be sure to match the symbols for wiring and piping. To room E safety devices between outdoor
208/230V
4) Pull the wire lightly to make sure that it does not unit and power source.
To room D
disconnect. Indoor unit
To room C
5) After completing the work, reattach the shield cover and Room A
right side plate to their original positions. To room B
• Attach so that the shield cover hooks (2 locations) are
securely engaged. Recommend using AWG14, stranded and insulated wire for connections
between indoor and outdoor units.
Local code always supersedes recommendation.
Terminal block
For Room E For Room C For Room D For Room A For Room B
For power supply
Shape the wires so that there is
no lifting of the shield cover or
other structural parts.
Use the speciï¬ed wires and
connect them securely.
Ground wires
Ground wires
CAUTION
Precautions to be taken for power supply wiring Round crimp-style
terminal
• When using stranded wires, make sure to use the round crimp-style Stranded
terminal for connection to the power supply terminal block. wire
Flat washer
Screw
Screw Screw
A Round crimp-
style terminal Flat washer
Round
Round crimp-
crimp-style
Flat washer style terminal
terminal Good Wrong
Arrow view A
• When connecting the inter-unit wires to the terminal block using a single core wire, be sure to curl the end of the lead.
Improper work may cause heat and fi re.
Excessive strip length
Strip wire end may cause electric shock
to this point. or current leakage.
Good Wrong
Good Wrong
Stripping wire at terminal block
Ground
This air conditioner must be grounded. For grounding, follow all local, and state electrical codes.
13 â– English
01_EN_3P537039-1.indd 13 9/12/2018 7:37:45 PM
Priority Room Setting
• To use priority room setting, initial settings must be made when the unit is installed. Explain the priority room setting, as
English
described below, to the user, and confi rm whether or not the user wants to use priority room setting.
Setting it in the guest and living rooms is convenient.
About the priority room setting function
The indoor unit for which priority room setting is applied takes priority in the following cases.
1) Operation mode priority
The operation mode of the indoor unit which is set for priority room setting
takes priority. If the set indoor unit is operating, all other indoor units do not
operate and enter standby mode, according to the operation mode of the
set indoor unit.
2) Priority during powerful operation
If the indoor unit which is set for priority room setting is operating at
powerful, the capabilities of other indoor units will be somewhat reduced.
Power supply gives priority to the indoor unit which is set for priority room
setting.
3) Quiet operation priority
Setting the indoor unit to quiet operation will make the outdoor unit run
quietly.
Setting procedure
Slide the priority room setting switch (SW4) to the on side for the switch that corresponds to the piping connected to the indoor
unit to be set.
(In the fi gure below, it is room A.)
Once the settings are complete, switch the power on.
Be sure to set only one room
Service PC-board
Remove
E the switch
D2 cover
C41 Priority room setting switch (SW4)
COOL3
B Screw E
2 D ON OFF
A C
1 B
A
2 E
1
4 D
3
2
1
C
COOL HEAT
B
A
â– English 14
01_EN_3P537039-1.indd 14 9/12/2018 7:37:46 PM
Night Quiet Mode setting
• If night quiet mode is to be used, initial settings must be made when the unit is installed. Explain night quiet mode, as described
below, to the user, and confi rm whether or not the user wants to use night quiet mode.
About night quiet mode
The night quiet mode function reduces operating noise of the outdoor unit at nighttime. This function is useful if the user is
worried about the effects of the operating noise on the neighbors.
However, if night quiet mode is running, cooling capacity will be saved.
Service PC-board
Setting procedure
Turn the night quiet mode switch (SW6-1) to on.
Remove
E the switch
Night quiet mode
D2 cover
4 E setting switch
C1 D
COOL3 C (SW6-1)
B Screw B
A2 A ON OFF
1 2
1 2
4
3
2 1
1
COOL HEAT
COOL/HEAT mode lock [S15]
1) Remove the top plate (10 screws). Top plate
2) Remove the right side plate (6 screws).
3) Remove the front plate (1 screw).
• The front plate is heavy, so take care.
4) Remove the shield plate (2 screws).
5) Use the S15 connector to set the unit to only cool
Right side plate
or heat.
Setting to only heat (H) : short-circuit pins 1 and 3
of the connector [S15]
Hooks
Setting to only cool (C) : short-circuit pins 3 and 5
of the connector [S15]
The following specifi cations apply to the connector
housing and pins. Front plate
Shield
JST products Housing: VHR-5N plate
Pin: SVH-21T-1,1
Note that forced operation is also possible in
COOL/HEAT mode.
6) Reattach the shield plate, front plate, right side S15 connector
plate and top plate to their original positions.
• Attach so that the shield plate hooks 5
COOL mode (C)
(2Â locations) are securely engaged. 3
HEAT mode (H)
1
15 â– English
01_EN_3P537039-1.indd 15 9/12/2018 7:37:47 PM
Pump Down Operation
In order to protect the environment, be sure to pump down when relocating or disposing of the unit.
English
1) Remove the valve caps from liquid stop valve and gas stop valve. Hexagonal
Close wrench
2) Carry out forced cooling operation.
Gas stop valve
3) After 1 to 2 minutes, close the liquid stop valve with a hexagonal
wrench.
Liquid stop
4) After 3 to 4 minutes, close the gas stop valve and stop forced valve
cooling operation.
5) Attach the valve cap once procedures are complete.
Valve caps
Forced cooling operation
1) Turn off the power.
2) Remove the right side plate (6 screws) and the shield cover (2 screws).
3) Remove the service PC-board switch cover (1 screw).
4) Switch SW5 and SW6 to off.
5) Turn the operation mode switch (SW2) to COOL.
6) Screw the service PC-board switch cover back on (1 screw).
7) Attach the shield cover (2 screws) and the right side plate (6 screws).
8) Turn on the power.
9) Push the forced operation switch (SW1) above the service PC-board cover. (The operation will start.)
• Forced cooling operation will stop automatically after about 8 minutes.
To stop the operation, push the forced operation switch (SW1) again.
•Switch SW5 and SW6 to off.
ON OFF
2
SW6
Service PC-board
1
Remove ON OFF
E the switch
D2 cover 4
C41
COOL3 E
B Screw D 3
2 C
A B SW5
1 A 2
2
1
1
4
3
2
1
COOL HEAT
Operation mode switch (SW2)
•Set to COOL.
COOL HEAT
Forced operation switch (SW1)
WARNING
Do not remove the switch cover unless the power has been turned off. (Risk of electric shock)
â– English 16
01_EN_3P537039-1.indd 16 9/12/2018 7:37:47 PM
Trial Operation and Testing
• Before starting the trial operation, measure the voltage at the primary side of the circuit breaker.
• Check that all liquid and gas stop valves are fully open.
• Check that piping and wiring all match. The wiring error check can be conveniently used for underground wiring and other wiring
that cannot be directly checked. However, if the outside air temperature is 41°F (5°C) or less , the wiring error check function
will not operate.
1. Wiring error check Service PC-board
This product is capable of automatic correction of wiring errors.
Press the wiring error check switch on the outdoor unit service PC-board. However, the
wiring error check switch will not function for 3 minutes after the safety breaker is turned
on. About 15-25 minutes after the switch is pressed, the errors in the connection wiring A
will be corrected. 1
2
3
The service monitor LEDs indicate whether or not correction is possible, as 4
shown in the table below. For details on how to read the LED display, refer to the
5
collective indications label on the reverse side of the right side plate or the service
manual. Wiring error
check switch
If self-correction is not possible, check the indoor unit wiring and piping in the usual (SW3)
manner.
LED 1 2 3 4 5 Message
All Flashing Automatic correction impossible
Status Flashing One after another Automatic correction completed
(One or more of LEDs 1 to 5 are ON) Abnormal stop [Note. 3]
Wiring error example
Terminal block
The ï¬gure at left shows branch wiring.
From Room E to the From Room D From Room C From Room A From Room B
“children’s room 2†to the “children’s room 1†to the “kitchen†to the “bedroom†to the “living roomâ€
Wiring error check
LED lighting sequence after a wiring correction.
Order of LED flashing: 2 1 3 4 5
NOTE
1) For two rooms, LED 3, 4 and 5 are not displayed, and for three rooms, LED 4 and 5 is not displayed, and for four rooms,
LED 5 is not displayed.
2) After wiring error check operation is completed, LED indication will continue until ordinary operation starts. This is normal.
3) Follow the product diagnosis procedures. (Details of product error diagnosis are listed on the reverse side of the right side plate.)
17 â– English
01_EN_3P537039-1.indd 17 9/12/2018 7:37:47 PM
2. Trial operation and testing English
• During the trial operation, first check the operation of each unit individually. After this, check the simultaneous operation of
all indoor units. Check both COOL and HEAT operations.
2-1. Measure the supply voltage and make sure that it is within the specified range.
2-2. In COOL operation, select the lowest programmable temperature;
in HEAT operation, select the highest programmable temperature.
• When operating the air conditioner in COOL operation in winter, or HEAT operation in summer, activate trial
operation mode by following the instructions in the installation manual for the indoor unit.
2-3. Carry out the trial operation following the instructions in the operation manual to
ensure that all functions and parts, such as the movement of the flap, are working
properly.
• To protect the air conditioner, restart operation is disabled for 3 minutes after the system has been turned off.
• When trial operation is conducted in HEAT operation directly after the circuit breaker is turned on, in some cases no
air will be output for about 3 to 20 minutes in order to protect the air conditioner.
• During COOL operation, frost may form on the gas stop valve or other parts. This is normal.
2-4. After running the unit for about 20 minutes, measure the temperatures at the
indoor unit inlet and outlet.
• If the measurements are above the values shown in the table below, then they are normal.
COOL operation HEAT operation
Temperature difference between
About 14°F (8°C) About 36°F (20°C)
inlet and outlet
(When running in one room)
2-5. After trial operation is complete, set the temperature to a normal level (78°F
to 82°F (26°C to 28°C) in COOL operation, 68°F to 75°F (20°C to 24°C) in HEAT
operation).
• The air conditioner draws a small amount of power in its standby mode. If the system is not to be used for some time after
installation, shut off the circuit breaker to eliminate unnecessary power consumption.
3. Test items
Test item Symptom Check
Indoor and outdoor units are installed securely. Fall, vibration, noise
No refrigerant gas leaks. Incomplete cooling/heating function
Refrigerant gas and liquid pipes and indoor drain hose extension
Water leakage
are thermally insulated.
Draining line is properly installed. Water leakage
System is properly grounded. Electrical leakage
Only specified wires are used for all wiring, and all wires are
No operation or burn damage
connected correctly.
Indoor or outdoor unit’s air inlet or air outlet are unobstructed. Incomplete cooling/heating function
Stop valves are opened. Incomplete cooling/heating function
Pipes and wires are connected to the corresponding terminal
Incomplete cooling/heating function
blocks/connection ports for the connected unit.
The priority room setting is set for only 1 room. The priority room setting will not function.
â– English 18
01_EN_3P537039-1.indd 18 9/12/2018 7:37:47 PM
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