Daikin RX15WMVJU9 User manual

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MODELS
RX15WMVJU9
RX18WMVJU9
RX24WMVJU9
RX30WMVJU9
RX36WMVJU9
RK30WMVJU9
RK36WMVJU9
RXL15WMVJU9
RXL18WMVJU9
RXL24WMVJU9
DAIKIN ROOM AIR CONDITIONER
INSTALLATION MANUAL
R410A Split Series
Installation manual
Manuel dinstallation
Manual de instalación
Manuel dinstallation
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1■English
Contents
Safety Considerations .................................... 1
Accessories ..................................................... 3
Precautions for Selecting a Location ........... 3
Precautions on Installation ............................ 4
Outdoor Unit Installation Diagram ................ 4
Installation Space Requirements .................. 5
Outdoor Unit Installation ................................ 5
1. Installing the outdoor unit ............................................ 5
2. Drain work (Only for heat pump models)..................... 5
3. Flaring the pipe end..................................................... 6
4. Refrigerant piping ........................................................ 6
5. Pressure test and evacuating system.......................... 7
6. Rellingrefrigerant ...................................................... 8
Wiring ............................................................... 9
Facility Setting
(cooling at low outdoor temperature) ........... 11
When attaching the drain pan heater ............ 12
Pump Down Operation ................................... 13
Trial Operation and
Testing ........................... 14
1. Trial operation and testing ........................................... 14
2. Test items .................................................................... 14
Safety Considerations
Refer also to the General Safety Considerations in the
separate booklet.
Read the precautions in this manual
carefully before operating the unit.
Read these Safety Considerations for Installation carefully
before installing an air conditioner or heat pump. After completing
the installation, make sure that the unit operates properly during
the startup operation.
Instruct the user on how to operate and maintain the unit.
Inform users that they should store this installation manual with
the operation manual for future reference.
Always use a licensed installer or contractor to install this product.
Improper installation can result in water or refrigerant leakage,
electricshock,re,orexplosion.
Meanings of DANGER, WARNING, CAUTION, and NOTE
Symbols:
DANGER ........... Indicates an imminently hazardous
situation which, if not avoided, will
result in death or serious injury.
WARNING ......... Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTION .......... Indicates a potentially hazardous
situation which, if not avoided, may
result in minor or moderate injury.
It may also be used to alert against
unsafe practices.
NOTE ................ Indicates situations that may result
in equipment or property damage
accidents only.
DANGER
• Refrigerantgasisheavierthanairandreplacesoxygen.
Amassiveleakcanleadtooxygendepletion,especially
inbasements,andanasphyxiationhazardcouldoccur
leading to serious injury or death.
•
Do not ground units to water pipes, gas pipes, telephone
wires, or lightning rods as incomplete grounding can cause
a severe shock hazard resulting in severe injury or death.
Additionally, grounding to gas pipes could cause a gas leak
andpotentialexplosioncausingsevereinjuryordeath.
• If refrigerant gas leaks during installation, ventilate the
areaimmediately.Refrigerantgasmayproducetoxicgas
ifitcomesintocontactwithre.Exposuretothisgascould
cause severe injury or death.
• After completing the installation work, check that the
refrigerant gas does not leak throughout the system.
• Donotinstallunitinanareawhereammablematerials
arepresentduetoriskofexplosionsthatcancause
serious injury or death.
• Safely dispose all packing and transportation materials
in accordance with federal/state/local laws or ordinances.
Packing materials such as nails and other metal or
wood parts, including plastic packing materials used for
transportation may cause injury or death by suffocation.
WARNING
• Onlyqualiedpersonnellicensedorcertiedintheir
jurisdiction must carry out the installation work. Installation
must be done in accordance with this installation manual.
Improper installation may result in water leakage, electric
shock,orre.
•
When installing the unit in a small room, take measures to keep
therefrigerantconcentrationfromexceedingallowablesafety
limits.Excessiverefrigerantleaks,intheeventofanaccidentin
aclosedambientspace,canleadtooxygendeciency.
• Useonlyspeciedaccessoriesandpartsforinstallation
work.Failuretousespeciedpartsmayresultinwater
leakage,electricshock,re,ortheunitfalling.
• Install the air conditioner or heat pump on a foundation
strong enough that it can withstand the weight of the unit.
Afoundationofinsufcientstrengthmayresultintheunit
falling and causing injury.
• Take into account strong winds, typhoons, or earthquakes
when installing. Improper installation may result in the unit
falling and causing accidents.
• Make sure that a separate power supply circuit is provided
for this unit and that all electrical work is carried out by
qualiedpersonnellicensedorcertiedintheirjurisdiction
according to local, state, and national regulations. An
insufcientpowersupplycapacityorimproperelectrical
constructionmayleadtoelectricshockorre.
The pictures in this document are for illustrative purposes only.
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• Makesurethatallwiringissecured,thatspeciedwires
areused,andthatnoexternalforcesactontheterminal
connections or wires. Improper connections or installation
mayresultinre.
• When wiring, position the wires so that the service lid can
be securely fastened. Improper positioning of the service
lidmayresultinelectricshock,re,ortheterminals
overheating.
• Before touching electrical parts, turn off the unit.
•
The circuit must be protected with safety devices in
accordance with local and national codes, i.e. a circuit breaker.
• Securely fasten the outdoor unit service lid. If the service lid
is not installed properly, dust or water may enter the outdoor
unitcausingreorelectricshock.
• When installing or relocating the system, keep the refrigerant
circuitfreefromsubstancesotherthanthespecied
refrigerant (R410A) such as air. Any presence of air or
other foreign substance in the refrigerant circuit can cause
an abnormal pressure rise or rupture, which may result in
equipment damage and even injury.
• Do not change the setting of the protection devices. If the
pressure switch, thermal switch, or other protection device
is shorted and operated forcibly, or parts other than those
speciedbyDaikinareused,reorexplosionmayoccur.
• Do not use means to accelerate the defrosting process (if
possible) or to clean, other than those recommended by
the manufacturer.
•
The appliance must be stored in a room without continuously
operatingignitionsources(forexample:openames,an
operating gas appliance or an operating electric heater).
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odor.
• Comply with national gas regulations.
CAUTION
• Donottouchtheswitchwithwetngers.Touchingaswitch
withwetngerscancauseelectricshock.
• Do not allow children to play on or around the unit to
prevent injury.
• Wear adequate personal protective equipment (protective
gloves, safety glasses,…) when installing, maintaining or
servicing the system.
• Theheatexchangernsaresharpenoughtocut.Toavoid
injury,wearglovesorcoverthenswhileworkingaround
them.
• Do not touch the refrigerant pipes during and immediately
after operation as the refrigerant pipes may be hot or
cold,dependingontheconditionoftherefrigerantowing
through the refrigerant piping, compressor, and other
refrigerant cycle parts.Your hands may suffer burns or
frostbite if you touch the refrigerant pipes. To avoid injury,
give the pipes time to return to normal temperature or, if
you must touch them, be sure to wear proper gloves.
•
Install drain piping to ensure proper drainage. Improper drain
piping may result in water leakage and property damage.
• Insulate piping to prevent condensation.
• Be careful when transporting the product.
• Do not turn off the power immediately after stopping
operation. Always wait for at least 5 minutes before turning
off the power. Otherwise, water leakage may occur.
• Do not use a charging cylinder. Using a charging cylinder
may cause the refrigerant to deteriorate.
•
Refrigerant R410A in the system must be kept clean, dry, and tight.
(a) Clean and Dry -- Foreign materials (including mineral
oils such as SUNISO oil or moisture) should be
prevented from getting into the system.
(b)
Tight -- R410A does not contain any chlorine, does not
destroy the ozone layer, and does not reduce the earth’s
protection again harmful ultraviolet radiation. R410A
can contribute to the greenhouse effect if it is released.
Therefore take proper measures to check for the tightness
of the refrigerant piping installation. Read the chapter
Refrigerant Piping and follow the procedures.
• Since R410A is a blend, the required additional refrigerant
must be charged in its liquid state. If the refrigerant is
charged in a state of gas, its composition can change and
the system will not work properly.
• The outdoor unit is for R410A. See the catalog for indoor
models that can be connected. Normal operation is not
possible when connected to non-compatible indoor units.
•
Remote controller (wireless kit) transmitting distance can be
shorterthanexpectedinroomswithelectronicuorescent
lamps (inverter or rapid start types). Install the indoor unit
farawayfromuorescentlampsasmuchaspossible.
• Indoor units are for indoor installation only. Outdoor units
can be installed either outdoors or indoors.
• Do not install the air conditioner or heat pump in the
following locations:
(a) Where a mineral oil mist or oil spray or vapor is
produced,forexample,inakitchen.
Plastic parts may deteriorate and fall off or result in
water leakage.
(b)
Where corrosive gas, such as sulfurous acid gas, is produced.
Corroding copper pipes or soldered parts may result in
refrigerant leakage.
(c) Near machinery emitting electromagnetic waves.
Electromagneticwavesmaydisturbtheoperationof
the control system and cause the unit to malfunction.
(d)
Whereammablegasmayleak,wherethereiscarbon
ber,orignitabledustsuspensionintheair,orwhere
volatileammablessuchasthinnerorgasolinearehandled.
Operatingtheunitinsuchconditionscancauseare.
• Take adequate measures to prevent the outdoor unit
from being used as a shelter by small animals. Small
animals making contact with electrical parts can cause
malfunctions,smoke,orre.Instructtheusertokeepthe
area around the unit clean.
• Servicing shall be performed only as recommended by the
manufacturerandlicensedorcertiedintheirjurisdiction.
NOTE
• The outdoor unit should be positioned where the unit and
power supply wires (breaker panel to outdoor unit) are at
least 10ft (3m) away from any televisions or radios. (The
unit may cause interference with the picture or sound.)
Depending on the radio waves, a distance of 10ft (3m)
maynotbesufcienttoeliminatethenoise.
• Dismantling the unit, treatment of the refrigerant, oil and
additional parts must be done in accordance with the
relevant local, state, and national regulations.
• Only use tools for R410A, such as a gauge manifold,
chargehose,gasleakdetector,reverseowcheckvalve,
refrigerant charge base, vacuum gauge, or refrigerant
recovery equipment.
• If the conventional refrigerant and refrigerator oil are
mixedinR410A,therefrigerantmaydeteriorate.
• This air conditioner or heat pump is an appliance that
should not be accessible to the general public.
• Asmaximumallowablepressureis604psi(4.17MPa),the
wallthicknessofeld-installedpipesshouldbeselected
in accordance with the relevant local, state, and national
regulations.
RN006-U
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Accessories
1
Installation manual
A
This is at the bottom of the packaging.
1
Drain socket*
B
6
1 1
3
Drain cap (1)*
CDrain cap (2)* D
Warranty
* Only for Heat pump models
EGeneral safety consideration
F
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ampli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sufcientspacetocarrytheunitintoandoutofthesite.
5) Theremustbesufcientspaceforairpassageandnoobstructionsaroundtheairinletandtheairoutlet.
6) Thesitemustnotbepronetoammablegasleaksinthesurroundingarea.
7) In coastal areas or other places with a salty atmosphere or one containing sulfate gas, corrosion may shorten the life of the air
conditioner.
8) Sincewaterwillowfromthedrainoftheoutdoorunit,donotplaceanythingundertheunitwhichmustbekeptawayfrom
moisture.
9) Alocationwhereammablegasdoesnotleak.Positionatleast6-5/8ft(2m)frompropanegascylinders.
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.
• Topreventexposuretowind,installtheoutdoorunitwithitssuction side facing the
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baf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
protection hood.
• 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.
• Construct a large canopy.
• Construct a pedestal.
Install the unit high enough off
the ground to prevent burying
in snow.
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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.
• Fixtheunitinplacesecurelyusingfoundationbolts,asinthegure.(Prepare4
sets of 5/16 inch (M8) or 3/8 inch (M10) foundation bolts, nuts and washers; all sold
separately.)
• It is best to screw in the foundation bolts until their ends are 3/4 inch (20mm) from the
foundation surface.
3/4” (20mm)
Outdoor Unit Installation Diagram
Refrigerant piping must be protected from
physical damage.
Install a plastic cover or equivalent.
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.
Gas pipe
Liquid pipe O.D. 1/4 inch (6.4mm)
O.D. 5/8 inch (15.9mm)
0.21oz/ft (20g/m) 0.32oz/ft (30g/m) 0.21oz/ft (20g/m) 0.32oz/ft (30g/m)
Max. allowable piping length
Max. allowable piping height
Additional refrigerant required for refrigerant
pipe exceeding 32-3/4ft (10m) in length.
Refrigerant piping must be kept to a minimum.
*Be sure to add the proper amount of additional refrigerant.
Failure to do so may result in reduced performance.
**The suggested shortest pipe length is 10ft (3m), in order to avoid
noise from the outdoor unit and vibration.
(Mechanical noise and vibration may occur depending on how
the unit is installed and the environment in which it is used.)
10ft (3m)
65-5/8ft (20m)
98-1/2ft (30m)
Min. allowable piping length
(Foot bolt-hole centers)
(From unit’s side)
**
*
Allow 11-13/16” (300mm)
of work space below the
ceiling surface.
9-13/16”(250mm) from wall
How to remove the stop
valve cover
1) Remove the screw on the
stop valve cover.
2) Slide the stop valve cover
downward to remove it.
1) Insert the upper part of
the stop valve cover into
the outdoor unit.
2) Tighten the screw.
How to attach the stop
valve cover
Stop valve cover
CAUTION
Keep the piping length between
10ft (3m) and 98-1/2ft (30m).
Wrap the insulation pipe with
finishing tape from bottom to
top.
Allow space for piping
and electrical servicing.
4-15/16 inch
(125mm)
If strong wind blows into the air discharge
side from the front and there is a danger
that the fan may be damaged, change the
orientation of the air discharge side of the
outdoor unit or use an air direction
adjustment grille (sold separately).
If there is a danger of the unit falling or overturning,
fix the unit with foundation bolts, or with wire or
other means.
RXL18 RX24 RX30/36, RK30/36
RXL24
RX15/18
RXL15
O.D. 1/2 inch (12.7mm)
13-5/8 inch
(346mm)
23-5/8 inch (600mm)
(Foot bolt-hole
centers)
English
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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theoutdoorunit’sintakeorexhaustairow,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.
• Secureasmuchinstallationspacearoundtheunitasthelocationallows,asmorespacewillresultinmoreefcientoperation.
More than
3-15/16 (100)
More than
13-3/4 (350)
Walls facing three sides
More than 3-15/16 (100)
More than 13-3/4 (350)
More than
1-15/16 (50)
Wall facing one side
More than
3-15/16 (100)
More than
13-3/4 (350)
Side view
47-1/4
(1200)
or less
Top view
More than
1-15/16 (50)
More
than
3-15/16
(100)
Walls facing two sides
More than
1-15/16 (50)
More than
13-3/4
(350)
Top view unit: inch (mm)
When installed as in the figure on the left, it is recommended to either
change the orientation of the outdoor unit outlet side or use the air direction
adjustment grille (sold separately).
Outdoor Unit Installation
1. Installing the outdoor unit
• 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 (Only for heat pump models)
CAUTION
• In cold areas, do not use a drain socket, drain caps (1,2) and a drain hose with the outdoor unit. (Drain water may freeze,
impairing heating performance.)
• Ifthedrainportiscoveredbyamountingbaseoroor
surface, place additional foot bases of at least 1-1/4
inch (30mm) in height under the outdoor unit’s feet.
1) Attach Cdrain cap (1) and Ddrain cap (2).
2) Attach Bdrain socket.
• When attaching Bdrain socket to the bottom
frame, make sure to connect the drain hose to the
drainsocketrst. Bottom frame
Drain cap
Pinch the bottom
frame in.
Drain cap (1)
Drain cap (2)
DDrain cap (2)
Air outlet side
BDrain
socket
C
D
Bottom frame
Drain socket
Hose (available commercially,
inner dia. 5/8 ” (16mm))
B
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3. Flaring the pipe end
WARNING
• Donotapplymineraloiltotheare.
• 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 this 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aringmayresultinrefrigerantgasleakage.
CAUTION
• Do not reuse joints which have been used once already.
1) Cut the pipe end with a pipe cutter.
2) Remove burrs with the cut surface facing
downward,sothatthelingsdonotenterthe
pipe.
3) Putthearenutonthepipe.
4) Flare the pipe.
5) Checkthatthearinghasbeendonecorrectly.
Check
The flare’s inner
surface must be
flaw-free.
When flaring, do
not over-tighten
and crack.
The pipe end must
be evenly flared in
a perfect circle.
Make sure that the
flare nut is fitted.
Set exactly at the position shown below.
Flaring
A
Die A0-0.020 inch
(0-0.5mm)
Clutch-type
Flare tool for R410A
0.039-0.059 inch
(1.0-1.5mm)
Clutch-type (Rigid-type)
0.059-0.079 inch
(1.5-2.0mm)
Wing-nut type (Imperial-type)
Conventional flare tool
Cut exactly at
right angles. Remove burrs.
4. Refrigerant piping
CAUTION
• Usethearenutxedtothemainunit.(Thisistopreventthearenutfromcrackingasaresultofdeteriorationovertime.)
• Topreventgasleakage,applyrefrigerationoilonlytotheinnersurfaceoftheare.(UserefrigerationoilforR410A.)
• Useatorquewrenchwhentighteningthearenutstopreventdamagetothearenutsandgasleakage.
• Alignthecentersofbotharesandtightenthearenuts3or4turnsbyhand,thentightenthemfullywithaspanneranda
torque wrench.
Do not apply refrigeration
oil to the outer surface.
Flare nut
Apply refrigeration
oil only to the inner
surface of the flare.
Do not apply refrigeration oil to
the flare nut to avoid tightening
with excessive torque.
Apply oil
Torque wrench
Piping union
Flare nut
Spanner
Tighten
Tightening torque
Piping connection
Flare nut
Gas side Liquid side
1/2 inch (12.7mm) 5/8 inch (15.9mm) 1/4 inch (6.4mm)
36-1/2–44-1/2lbf • ft
(49.5-60.3N • m)
45-5/8–55-5/8lbf • ft
(61.8-75.4N • m)
10-1/2–12-3/4lbf • ft
(14.2-17.2N • m)
Valve cap
Widthacrossats
11/16 inch (17mm) 1-1/16 inch (27mm) 1-3/16 inch (30mm)
10-1/2–12-5/8lbf • ft
(14.2-17.2N • m)
35-3/8–44-1/8lbf • ft
(48.0-59.8N • m)
16-5/8–20-1/4Ibf • ft
(22.5-27.5N • m)
Service port cap
8–10-7/8lbf • ft
(10.7-14.7N • m)
English
01_EN_3P686858-1.indd 6 2022/05/16 9:32:42

7■English
Outdoor Unit Installation
Cautions on pipe handling
• Protect the open end of the pipe from dust and moisture.
• All pipe bends should be as gentle as possible. Use a pipe bender for bending.
Selection of copper and heat insulation materials
Whenusingcommercialcopperpipesandttings,observethefollowing:
• 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.
• ACR Copper only.
• Be sure to insulate both the gas and liquid piping and observe the insulation dimensions as below.
Gas side
Piping size
O.D. 5/8 inch
(15.9mm)
O.D. 1/4 inch
(6.4mm)
1-15/16 inch (50mm)
or more
1-3/16 inch (30mm)
or more
0.039 inch (1.0mm)
(C1220T-O)
0.031 inch (0.8mm)
(C1220T-O)
I.D. 5/8-13/16 inch
(16-20mm)
I.D. 5/16-13/32 inch
(8-10mm)
13/32 inch
(10mm) Min.
Minimum bend radius Piping thickness Thermal insulation size Thermal insulation
thickness
Liquid side
O.D. 1/2 inch
(12.7mm)
1-9/16 inch (40mm)
or more
0.031 inch (0.8mm)
(C1220T-O)
I.D. 9/16-5/8 inch
(14-16mm)
• Use separate thermal insulation pipes for gas and liquid refrigerant pipes.
• Usingnishingtape,bundleandwraptheindoorunitpipinganddrainhose
together so that the drain hose is below the other piping.
Gas pipe
Liquid pipe
Gas pipe
insulation
Liquid pipe
insulation
Finishing tape Drain hose
5. Pressure test and evacuating system
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.
Wall
If no flare cap is
available, cover
the flare mouth
with tape to keep
dirt and water out.
Be sure to
place a cap.
Rain
01_EN_3P686858-1.indd 7 2022/05/16 9:32:42

8■English
• When piping work is complete, it is necessary to perform a pressure test
and evacuate system with a vacuum pump.
• If using additional refrigerant, purge the air from the refrigerant pipes and
indoor unit using a vacuum pump, then charge additional refrigerant.
• Useahexagonalwrench(3/16inch(4mm))tooperatethestopvalverod.
• All refrigerant pipe joints should be tightened with a torque wrench to the
speciedtighteningtorque.
Compound
pressure gauge
Pressure
meter
High-pressure
valve
Low-pressure
valve
Vacuum pump
Service port
Liquid
stop
valve
Valve caps
Gas stop valve
Charging
hoses
Gauge
manifold
1) Pressurize the liquid pipe and gas pipe from the service ports of each stop valve to 604psi (4.17MPa) (do not pressurize
more than 604psi (4.17MPa)) 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 pumping.
(Maintain this condition for a few minutes to make sure that the compound pressure gauge pointer does not swing
back.)*1
6) Remove the valve caps from the liquid stop valve 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areandoutdoorunit’sare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specied
torques.
Refer to “4. Refrigerant piping” on page 6 for details.
*1If 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).
6. Relling 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.
• Beforelling,checkwhetherthecylinderhasasiphonattachedornot.(Itshouldhavesomethinglike“liquidllingsiphon
attached” displayed on it.)
Filling a cylinder with an attached siphon
Stand the cylinder upright when filling.
There is a siphon pipe inside, so the cylinder
need not be upside-down to fill with liquid.
Filling other cylinders
Turn the cylinder
upside-down when filling.
• Be sure to use the R410A tools to ensure pressure and to prevent foreign objects from entering.
English
01_EN_3P686858-1.indd 8 2022/05/16 9:32:43

9■English
Wiring
WARNING
• Do not ground units to water pipes, gas pipes, telephone wires, or lightning rods as incomplete grounding can cause a
severe shock hazard resulting in severe injury or death.
Additionally,groundingtogaspipescouldcauseagasleakandpotentialexplosioncausingsevereinjuryordeath.
• Donotusetappedwires,extensioncords,orstarburstconnections,astheymaycauseoverheating,electricshock,or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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re.
• Do not turn on the circuit breaker until all work is completed.
CAUTION
Precautions to be taken for power supply wiring
Recommend stranded cable for interunit wiring. Local code always supersedes recommendation.
• For stranded wires, make sure to use the round crimp-style terminal for
connection to the power supply terminal block. Place the round crimp-
style terminals on the wires up to the covered part and secure in place.
Round crimp-style
terminal
Stranded wire
Screw
Flat washer Screw Screw
Flat washer
Flat washer
Good Wrong
A
Round
crimp-style
terminal
Round crimp-style
terminal
Round crimp-style
terminal
Arrow view A
• Ifsolidcorewiremustbeused,besuretocurltheendofthelead.Improperworkmaycauseheatandre.
Good
Good
Stripping wire at terminal block
Wrong
Wrong
Strip wire end
to this point.
Excessivestriplength
may cause electric shock
or current leakage.
1) Strip the insulation from the wire (3/4 inch (20mm)).
2) Connect the inter-unit wires between the indoor and outdoor units so that the terminal numbers match. Tighten the
terminal screws securely. It is recommended that a slot-head screwdriver be used to tighten the screws.
1
2
3
1 2 3
Follow local codes for wiring
and safety devices between
outdoor unit and power
source.
Ground
Firmly fix the wires with
the terminal screws.
Recommend using AWG14, stranded and
insulated wire for connections between indoor and
outdoor units.
Local code always supersedes recommendation.
Outdoor unit
Indoor
unit Power supply
60Hz 208-230V
RX15/18, RXL15 15A
RX24/30/36,
RK30/36, 20A
RXL18/24
Firmly fix the
wires with the
terminal screws.
L 1 L 2
NOTE
Take care to ensure that all wiring between indoor unit and outdoor unit has a consistent connection. Any splices can cause
communication errors.
01_EN_3P686858-1.indd 9 2022/05/16 9:32:43

10■English
[Method of mounting conduit]
1) Dismount the service lid by removing the 2 screws.
2) Pass wires through the conduit and secure them with a lock nut.
3) After completing the work, reattach the service lid to its original position.
RX15/18/24, RXL15 models
123
123
Power supply
terminal block
Shape wires so
that the service lid
fits securely.
Service lid
Screws
L1
L2
Conduit
Lock nut
Conduit
mounting
plate
RX30/36, RK30/36, RXL18/24 models
Shape wires so that the
service lid fits securely.
Service lid
Screws
Conduit
Lock nut
Conduit
mounting
plate
L1L2
1 2 3
Terminal block
For power supply
Ground
This air conditioner must be grounded. For grounding, follow all local, and state electrical codes.
English
01_EN_3P686858-1.indd 10 2022/05/16 9:32:43

11 ■English
Facility Setting (cooling at low outdoor temperature)
WARNING
• Make sure to turn the power OFF before performing work.
CAUTION
• Iftheoutdoorunitisinstalledwheretheheatexchangeroftheunitisexposedtodirectwind,provideawindbreakwall.
• Intermittent noises may be produced by the indoor unit due to the outdoor fan turning on and off when using facility settings.
• Donotplacehumidiersorotheritemswhichmightraisethehumidityinroomswherefacilitysettingsarebeingused.
Ahumidiermightcausedewcondensationfromtheindoorunitoutletvent.
• Activating the facility setting sets the indoor fan tap to the highest position. Notify the user about this.
This function is designed for facilities such as equipment or computer rooms. It is never to be used in a
residence or ofce where people occupy the space.
RX15/18/24, RXL15 models
Cutting jumper 6 (J6)onthePCBwillextendtheoperationrangeto14°F(–10°C).Installinganairdirectionadjustmentgrille
(soldseparately)willfurtherextendtheoperationrangeto–4°F(–20°C).Inthesecases,theunitwillstopoperatingiftheoutdoor
temperature falls below –4°F (–20°C), restarting once the temperature rises above this level.
1) Remove the top plate of the outdoor unit. (6 screws)
2) Remove the front plate. (8 screws)
3) Remove the anti-drip cover.
4) Cut the jumper (J6) of the PCB inside.
Front plate
Anti-drip cover
Top plate
Cut jumper J6.
J9 J4 J6
RX30/36, RK30/36, RXL18/24 models
TurningonSW5-3onthePCBwillextendtheoperationrangeto14°F(–10°C).Installinganairdirectionadjustmentgrille(sold
separately)willfurtherextendtheoperationrangeto–4°F(–20°C).Inthesecases,theunitwillstopoperatingiftheoutdoor
temperature falls below –4°F (–20°C), restarting once the temperature rises above this level.
1) Remove the service lid. (2 screws)
2) Remove the switch cover. (1 screw)
3) Turn on SW5-3.
PCB
HEAT
COOL
4 3 2 1 6 5
E
D C
B A
4 3
ON
OFF
2 1
SW5
Turn on switch 3.
Screw
Remove
the switch
cover.
Only for cooling models
In addition to turning on SW5-3, turning on SW6-2 as well on the PCB will
extendtheoperationrangeto-22°F(–30°C).Theunitwillstopoperatingifthe
outdoor temperature falls below –22°F (–30°C), restarting once the
temperature rises above this level.
1) Turn on SW6-2 in addition to SW5-3.
NOTE
When the outdoor temperature is below –4°F (–20°C) and if SW6-2 in this step is
turned on, for the purpose of protecting the compressor, it may take up to 3 hours
for operation to begin while the system warms up.
PCB
HEAT
COOL
4 3 2 1 2 1
E
D C
B A
ON
OFF
2 1
SW6
Turn on switch 2.
01_EN_3P686858-1.indd 11 2022/05/16 9:32:43

12■English
When attaching the drain pan heater
WARNING
• Make sure to turn the power OFF before performing work.
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.
RX15/18/24, RXL15 models
1) Attach the drain pan heater in accordance with the installation manual included with the drain pan heater.
2) Cut the jumper (J9) of the PCB inside.
Cut jumper J9.
J9 J4 J6
RX30/36, RK30/36, RXL18/24 models
1) Attach the drain pan heater in accordance with the installation manual included with the drain pan heater.
2) Turn on SW6-1 on the PCB.
PCB
HEAT
COOL
4 3 2 1 6 5
E
D C
B A
ON
OFF
6 5
SW6
1 2
Turn on switch 1.
Screw
Remove
the switch
cover.
English
01_EN_3P686858-1.indd 12 2022/05/16 9:32:44

13 ■English
Pump Down Operation
In order to protect the environment, be sure to pump down when relocating or disposing of the unit.
1) Remove the valve caps from the liquid stop valve and gas stop valve.
2) Begin forced cooling operation.
3) After5to10minutes,closetheliquidstopvalvewithahexagonalwrench.
4) After 2 to 3 minutes, close the gas stop valve and stop forced cooling operation.
5) Attach the valve caps once procedures are complete.
Gas
stop valve
Valve cap
Hexagonal
wrench
Close
Liquid
stop valve
Service port
Forced cooling operation
Using the indoor unit ON/OFF switch
[For FTX, FTXR and FVX models]
Press the indoor unit ON/OFF switch for at least 5 seconds.
(The operation will start.)
• Forcedcoolingoperationwillstopautomaticallyafterabout15minutes.
To stop the operation, press the indoor unit ON/OFF switch.
Using the indoor unit’s remote controller
[For FFQ and FDMQ models]
[For wired remote controller]
1) Set to COOL operation using the remote controller.
2) PressandholdtheCancelbuttonfor4secondsorlonger.
Service settings menu is displayed.
3) Select Test Operation in the service settings menu, and press
the Menu/OK button. Basic screen returns and “Test Operation” is
displayed at the bottom.
4) PresstheOn/Offbuttonwithin10seconds,andtheforcedcooling
operation starts.
• Forced cooling operation will stop automatically after about
15minutes.Tostoptheoperation,presstheOn/Offbutton.
[For wireless remote controller]
1) Press and select the COOL operation.
2) Press twice. “Test” is displayed.
3) Press within 10 seconds, and the forced cooling operation
starts.
Basic screen
1)
2) Cool
Set to
Cool
68F
Press and hold the Cancel
button for 4 seconds or
longer during backlight lit.
Service Settings
menu screen
3)
Setting
1/3
Service Settings
Test Operation
Maintenance Contact
Field Settings
Energy Saving Options
Prohibit Buttons
Min Setpoints Differential
Press the Menu/OK button.
4)
80°F
Cool
Test Operation
Press the On/Off button
(within 10 seconds).
• Forcedcoolingoperationwillstopautomaticallyafterabout15minutes.
To stop the operation, press .
01_EN_3P686858-1.indd 13 2022/05/16 9:32:44

14■English
[For FTX18/24/30/36, FTXR, FVXS models]
1) Press , and at the same time.
2) Press , select “ ”, and press forconrmation.
3) Press and select the COOL operation.
4) Press to turn on the system.
• Forced cooling operation will stop automatically after about 30 minutes. To stop the operation, press .
[For FTX15 models]
1) Press , and at the same time.
2) Press , then select , press .
3) Press to turn on the system.
• Forced cooling operation will stop automatically after about 30 minutes.
To stop the operation, press .
Trial Operation and Testing
• When trial operation is conducted directly after the circuit breaker is turned on, in some cases no air will be output for about
15minutesinordertoprotecttheairconditioner.
1. Trial operation and testing
Refer to the installation manual for the indoor unit.
2. Test items
Test items 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are
thermally insulated. Water leakage
Draining line is properly installed. Water leakage
System is properly grounded. Electricalleakage
Onlyspeciedwiresareusedforallwiring,andallwiresareconnected
correctly. No operation or burn damage
Indoor or outdoor unit’s air inlet or air outlet are unobstructed. Incomplete cooling/heating function
Stop valves are opened. Incomplete cooling/heating function
[For FFQ models]
Check that the connector of the lead wires of the decoration panel is
connected securely.
Louvers do not move
Indoor unit properly receives remote control commands. No operation
English
01_EN_3P686858-1.indd 14 2022/05/16 9:32:45

Two-dimensional bar code
is a manufacturing code.
3P686858-1 M21B536 (2205) HT
00_CV_3P686858-1.indd 2 2022/02/14 17:04:09