Daikin FXLQ07MVJU User manual

MODELS
Floor standing type and Concealed oor standing type
FXLQ07MVJU FXNQ07MVJU
FXLQ09MVJU FXNQ09MVJU
FXLQ12MVJU FXNQ12MVJU
FXLQ18MVJU FXNQ18MVJU
FXLQ24MVJU FXNQ24MVJU
INSTALLATION MANUAL
READ THESE INSTRUCTIONS CAREFULLY BEFORE INSTALLATION.
KEEP THIS MANUAL IN A HANDY PLACE FOR FUTURE REFERENCE.
LIRE SOIGNEUSEMENT CES INSTRUCTIONS AVANT L’INSTALLATION.
CONSERVER CE MANUEL A PORTEE DE MAIN POUR REFERENCE ULTERIEURE.
LEA CUIDADOSAMENTE ESTAS INSTRUCCIONES ANTES DE INSTALAR.
GUARDE ESTE MANUAL EN UN LUGAR A MANO PARA LEER EN CASO DE TENER
ALGUNA DUDA.
SYSTEM Inverter Air Conditioners
3P086154-3R
English
Français
Español
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13P086154-3R English
CONTENTS
1. SAFETY CONSIDERATIONS .......................................... 1
2. BEFORE INSTALLATION................................................. 3
3. SELECTING INSTALLATION SITE .................................. 4
4. PREPARATIONS BEFORE INSTALLATION .................... 5
5. INDOOR UNIT INSTALLATION........................................ 5
6. REFRIGERANT PIPING WORK ...................................... 6
7. DRAIN PIPING WORK..................................................... 7
8. ELECTRIC WIRING WORK ............................................. 8
9. WIRING EXAMPLE AND HOW TO SET THE REMOTE
CONTROLLER ................................................................ 9
10. FIELD SETTING ............................................................ 11
11. TEST OPERATION ........................................................ 12
1. SAFETY CONSIDERATIONS
Read these SAFETY CONSIDERATIONS for Installation
carefully before installing air conditioning equipment. After
completing the installation, make sure that the unit operates
properly during the startup operation.
Instruct the customer on how to operate and maintain the
unit. Inform customers 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, electrical shock, re, or explosion.
Meanings of DANGER, WARNING, CAUTION, and NOTE
Symbols:
DANGER ................Indicates an imminently haz-
ardous situation which, if not
avoided, will result in death or
serious injury.
WARNING ..............Indicates a potentially haz-
ardous situation which, if not
avoided, could result in death
or serious injury.
CAUTION ...............Indicates a potentially haz-
ardous 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 proper-
ty-damage accidents only.
DANGER
• Refrigerant gas is heavier than air and replaces oxy-
gen.
A massive leak can lead to oxygen depletion, espe-
cially in basements, and an asphyxiation hazard could
occur leading to serious injury or death.
• Do not ground units to water pipes, gas pipes, tele-
phone wires, or lightning rods as incomplete ground-
ing 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in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mate-
rials are present due to risk of explosions that can
cause serious injury or death.
• Safely dispose all packing and transportation mate-
rials in accordance with federal/state/local laws or
ordinances. Packing materials such as nails and other
metal or wood parts, including plastic packing ma-
terials used for transportation may cause injuries or
death by suffocation.
WARNING
• Onlyqualiedpersonnelmustcarryouttheinstalla-
tion 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 mea-
sures to keep the refrigerant concentration from ex-
ceeding 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installa-
tionwork.Failuretousespeciedpartsmayresultin
waterleakage,electricshocks,re,ortheunitfalling.
• Install the air conditioner or heat pump on a founda-
tion 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 injuries.
• Take into account strong winds, typhoons, or earth-
quakes when installing. Improper installation may
result in the unit falling and causing accidents.
• Make sure that a separate power supply circuit is pro-
vided for this unit and that all electrical work is carried
outbyqualiedpersonnelaccordingtolocal,state
andnationalregulations.Aninsufcientpowersupply
capacity or improper electrical construction may lead
toelectricshocksorre.
• 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 control box
cover can be securely fastened. Improper positioning
of the control box cover may result in electric shocks,
re,ortheterminalsoverheating.
• Before touching electrical parts, turn off the unit.
• This equipment can be installed with a Ground-Fault
Circuit Interrupter (GFCI). Although this is a recog-
nized measure for additional protection, with the
grounding system in North America, a dedicated GFCI
is not necessary.
• Securely fasten the outdoor unit terminal cover (pan-
el). If the terminal cover/panel is not installed properly,
dustorwatermayentertheoutdoorunitcausingre
or electric shock.
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• When installing or relocating the system, keep the
refrigerant circuit free from substances other than the
speciedrefrigerant(R410A)suchasair.Anypres-
ence of air or other foreign substance in the refriger-
ant circuit can cause an abnormal pressure rise or
rupture, resulting in injury.
• Do not change the setting of the protection devices. If
the pressure switch, thermal switch, or other protec-
tion device is shorted and operated forcibly, or parts
otherthanthosespeciedbyDaikinareused,reor
explosion may occur.
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.
• Do not touch the refrigerant pipes during and imme-
diately after operation as the refrigerant pipes may be
hot or cold, depending on the condition of the refriger-
antowingthroughtherefrigerantpiping,compres-
sor, 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.
• Heatexchangernsaresharpenoughtocut.
Toavoidinjuryweargloveorcoverthenswhen
working around them.
• Install drain piping to proper drainage. Improper drain
piping may result in water leakage and property dam-
age.
• Insulate piping to prevent condensation.
• Be careful when transporting the product.
• Do not turn off the power supply immediately after
stopping operation. Always wait for at least 5 minutes
before turning off the power supply. Otherwise, water
leakage may occur.
• Do not use a charging cylinder. Using a charging cylin-
der 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 min-
eral 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 mea-
sures to check for the tightness of the refrigerant
piping installation. Read the chapter Refrigerant
Piping Work and follow the procedures.
• SinceR410Aisablend,therequiredadditionalrefrig-
erant must be charged in its liquid state. If the refriger-
ant is charged in a state of gas, its composition can
change and the system will not work properly.
• TheindoorunitisforR410A.Seethecatalogforin-
door models that can be connected. Normal operation
is not possible when connected to other units.
• 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 mal-
function.
(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cus-
tomer to keep the area around the unit clean.
NOTE
• Install the power supply and transmission wires for
theindoorandoutdoorunitsatleast3.5feet(1m)
away from televisions or radios to prevent image
interference or noise. Depending on the radio waves,
adistanceof3.5feet(1m)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.
• Do not use the following tools that are used with con-
ventional refrigerants: gauge manifold, charge hose,
gasleakdetector,reverseowcheckvalve,refriger-
ant charge base, vacuum gauge, or refrigerant recov-
ery 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designpressureis450psi,thewallthicknessof
eld-installedpipesshouldbeselectedinaccordance
with the relevant local, state, and national regulations.
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2. BEFORE INSTALLATION
• When moving the unit while removing it from the pack-
ing case, be sure to lift it by the four hanger brackets.
Avoid putting any pressure on other parts especially
the refrigerant piping.
• Be sure to check the type of R410A refrigerant to be used
before installing the unit. (Using an incorrect refrigerant will
prevent normal operation of the unit.)
• The accessories needed for installation must be retained in
your custody until the installation work is completed. Do not
discard them!
• Decide upon a line of transport.
• Leave the unit inside its packaging while moving, until
reaching the installation site.Where unpacking is unavoid-
able, use a sling of soft material or protective plates togeth-
er with a rope when lifting, to avoid damage or scratches to
the unit.
• For the installation of an outdoor unit, refer to the installa-
tion manual attached to the outdoor unit.
• Do not install or operate the unit in rooms mentioned below.
• Ladenwithmineraloil,orlledwithoilvaporor
spray like in kitchens. (Plastic parts may deteriorate
which could eventually cause the unit to fall out of
place, or could lead to leaks.)
• Where corrosive gas like sulfurous gas exists. (Cop-
per tubing and brazed spots may corrode which
could eventually lead to refrigerant leaks.)
• Where machines can generate electromagnetic
waves. (Control system may malfunction.)
• Where the air contains high levels of salt such as
thatneartheoceanandwherevoltageuctuates
greatly such as that in factories.
Also in vehicles or vessels.
• This unit, both indoor and outdoor, is suitable for installation
in a commercial and light industrial environment.
If installed as a household appliance it could cause electro-
magnetic interference.
WARNING
• Entrust installation to the place of purchase or an autho-
rized serviceman. Improper installation could lead to leaks
and, in worse cases, electric shock of re.
• Use of unspecied parts could lead to the unit falling, leaks
and, in worse cases, electric shock or re.
NOTE
• Be sure to read this manual before installing the indoor unit.
2-1 ACCESSORIES
Check the following accessories are included with your
unit.
Name Drain hose Insulation for tting
Quantity 1 set 1 each
Shape
Hose × 1
Metal clamp × 1
(1) (2)
(3) For gas pipe
(4) For liquid pipe
Name Sealing pad Clamp
Quantity 1 pc. 8 pcs.
Shape
(5) (6)
Name Leveling screw
[Other]
• Operation manual
• Installation manual
Quantity 4 pcs.
Shape
(7)
2-2 OPTIONAL ACCESSORIES
Table 1
Remote controller
Wired type BRC1E73
FOR THE FOLLOWING ITEMS, TAKE SPE-
CIAL CARE DURING CONSTRUCTION AND
CHECK AFTER INSTALLATION IS FINISHED.
a. Items to be checked after completion of work
Items to be checked If not properly done, what is
likely to occur. Check
Are the indoor and outdoor
unit xed rmly?
The units may drop, vibrate
or make noise.
Is the gas leak test
nished?
It may result in insufcient
cooling.
Is the unit fully insulated? Condensate water may drip.
Does drainage ow
smoothly? Condensate water may drip.
Does the power supply
voltage correspond to that
shown on the name plate?
The unit may malfunction
or the components burn out.
Are wiring and piping
correct?
The unit may malfunction
or the components burn out.
Is the unit safely grounded? It may be dangerous at
electric leakage.
Is wiring size according to
specications?
The unit may malfunction
or the components burn out.
Is something blocking the
air outlet or inlet of either
the indoor or outdoor units?
It may result in insufcient
cooling.
Are refrigerant piping length
and additional refrigerant
charge noted down?
The refrigerant charge in
the system is not clear.
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3P086154-3R English
b. Items to be checked at time of delivery
Also review the “SAFETY CONSIDERATIONS”
Items to be checked Check
Did you explain about the indoor unit operation while
showing the operation manual to your customer?
Did you hand the operation manual over to your cus-
tomer?
2-3 NOTE TO THE INSTALLER
Be sure to instruct customers how to properly operate the unit
(especially cleaning lters, operating different functions, and
adjusting the temperature) by having them carry out opera-
tions themselves while looking at the manual.
3. SELECTING INSTALLATION SITE
(1) Select an installation site where the following condi-
tionsaresatisedandthatmeetswithyourcustom-
er’s approval.
•
The oor is strong enough to bear the indoor unit weight.
• The oor is not signicantly inclined.
• Nothing blocks the air passage.
• Condensate can be properly drained.
• Sufcient clearance for installation and maintenance can
be ensured.
• Optimum air distribution can be ensured.
• There is no risk of ammable gas leakage.
• Piping between indoor and outdoor units is possible
within the allowable limit. (Refer to the installation manu-
al of the outdoor unit.)
WARNING
• If the supporting structural members are not strong enough
to take the unit’s weight, the unit could fall out of place and
cause serious injury.
• Do not install unit in an area where ammable materials are
present due to the risk explosion resulting in serious injury
or death.
CAUTION
• Install the indoor and outdoor units, power supply wiring
and connecting wires at least 3.5 ft. (1m) away from televi-
sions or radios in order to prevent image interference or
noise.
(Depending on the radio waves, a distance of 3.5 ft. (1m)
may not be enough to eliminate the noise.)
Base
FXLQ
Window
4 (100)
or more
(FXLQ)
6 (150)
or more
(FXNQ)
4 (100)
or more
(FXLQ)
3/4 (20) or more
40 (1000)
or more
70 (1750)
or more
Air flow direction
Air inlet
direction
Front side
[unit : in. (mm)]
FXNQ
Maintenance
area
3 1/8 (80) or more
A or more
B or more
24 5/8 (625)
(IMPORTANT) Leave sufficient clearance for air inlet
and maintenance. [unit: in. (mm)]
Model A
FXNQ12MVJU 28 (710)
FXNQ18 · 24MVJU 39 (990)
B
46 (1170)
FXNQ07 · 09MVJU 23 (570) 41 (1030)
57 (1450)
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4. PREPARATIONS BEFORE INSTALLA-
TION
(1) Positioning of holes for fastening to the wall
A
9 3/16
(233)
7 9/16
(192)
Model A
07 · 09 type 23 1/4 (590)
12 type 28 3/4 (730)
18 · 24 type 39 3/4 (1010)
[unit: in. (mm)]
(2) How to open / close the front panel (FXLQ)
14
4
5
3
2
1. Open the lid of control panel (both left and right)
2. Remove screws (both left and right) that lock the knobs
in position.
3. Push the knobs (both left and right) to the rear.
4. Lift the front of the top plate.
5. Lower the front panel towards the front of the unit.
• To close, perform the procedure in opposite order. Pull
towards the front of the unit the knob snaps in place.
5. INDOOR UNIT INSTALLATION
As for the parts to be used for installation work, be sure to use
the provided accessories and specied parts designated by
Daikin.
(1) Level the indoor unit with the leveling screws (7). If
theooristoouneventoleveltheunit,placetheunit
onaatbaseandlevel.
Leveling screws (7)
(accessory)
(2) If the unit is in danger of falling over, either fasten to
the wall using the holes provided, or fasten to the
oorwithanoptionaloorfastener.
(3) The legs can be retracted if the indoor unit is to be
hung on a wall. To do so, lift the legs as shown in the
gurebelow.
Lift legs.
FXLQ
Lift legs.
FXNQ
NOTE
1. Use the installation mount for installation. Check whether
the wall is strong enough to bear the weight of the unit or
not. If there is a risk, reinforce the wall before installing the
unit.
2. The unit requires a minimum 4 in. (100mm) clearance on
the underside for air intake. Also, ensure the unit is level
when installed so that drainage ows smoothly. If inclined,
water can leak.
3. The quality of the wall could affect operating sound.
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(4) Perform the following procedure to mount the re-
mote controller (optional accessory) on the unit if
desired. (FXLQ type only)
• Open the left side lid of control panel and mount the
lower case of the remote controller.
See the installation manual at-
tached to the remote control-
ler for instructions on screw
fastening and wiring for the
remote controller.
Installation
screw
Lower case
of remote
controller
Lid of control
panel
CAUTION
• Setting the unit at an angle opposite to the drain piping
might cause leaks.
6. REFRIGERANT PIPING WORK
For refrigerant piping of outdoor units, see the installa-
tion manual attached to the outdoor unit.
Execute heat insulation work completely on both sides of
the gas piping and the liquid piping. Otherwise, conden-
sation may occur causing water damage.
(When using a heat pump, the temperature of the gas piping
can reach up to approximately 250°F (120°C), so use insula-
tion that is sufciently resistant.)
Also, in cases where the temperature and humidity of
therefrigerantpipingsectionsmightexceed86°F(30°C)
orRH80%,reinforcetherefrigerantinsulation.(13/16”
(20mm)orthicker)Condensatemayformonthesurface
of the insulating material.
Before refrigerant piping work, check which type of refrig-
erant is used. Proper operation is not possible if the types
of refrigerant are not the same.
NOTE
• Use a pipe cutter and are suitable for the type of refriger-
ant.
• To prevent dust, moisture or other foreign matter from inl-
trating the tube, either pinch the end or cover it with tape.
• Do not allow anything other than the designated refrigerant
to get mixed into the refrigerant circuit, such as air, etc.
• If any refrigerant gas leaks while working on the unit, venti-
late the room thoroughly right away.
• The outdoor unit is charged with refrigerant.
• Use copper alloy seamless pipes.
• To prevent are nut cracking and gas leaks, be sure to use
both a spanner and torque wrench together, as shown in
the drawing, when connecting or disconnecting pipes to /
from the unit.
• Refer to Table 2 for the dimensions of are.
• When making a are connection, coat the ared inner sur-
face only with ether oil or ester oil.
Then, turn the are nut 3 to 4 times with your hand and
screw in the nut.
• Refer to the Table 2 for tightening torque.
• After inspecting pipe joints for gas leakage, be sure to insu-
late with the accessory joint insulation for tting (3) (4) while
referring to the gure below.
(Fasten both ends with clamps (6).)
• Wrap only the gas line side with the sealing pad (5). Bend
the pad over the insulation for tting (union) from above.
Coat the flared inner surface
only with ether oil or ester oil
Torque wrench
Spanner
Piping union
Flare nut
Insulation for fitting
(accessory) (4)
(For liquid pipe)
Clamp (6)
(accessory)
Insulation for fitting
(accessory) (3)
(For gas pipe)
Sealing pad (accessory) (5)
(Wrapped over union)
Gas pipe
Liquid pipe
Fig. 1
Use “Table 3” as a reference if a torque wrench is not available.
Once work is complete, make sure there is no gas leaking. As
the are nut is tightened with the wrench, the torque will sud-
denly increase. From that position, tighten the nut to the angle
shown on “Table 3”.
• Make absolutely sure to execute heat insulation works on
the pipe-connecting section after checking gas leakage
by thoroughly studying the following gure and using the
attached heat insulating materials for tting (3) and (4).
(Fasten both ends with the clamps (6) (accessory).) (Refer
to Fig. 1)
CAUTION
• Be sure to insulate any eld piping all the way to the piping
connection inside the unit. Any exposed piping may cause
condensate or burns if touched.
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CAUTION
• CAUTION TO BE TAKEN WHEN BRAZING REFRIGER-
ANT PIPING
Do not use ux when brazing refrigerant piping. Therefore,
use the phosphor copper brazing lter metal (BCuP) which
does not require ux.
(Flux has an extremely negative effect on refrigerant pip-
ing systems. For instance, if chlorine based ux is used, it
will cause pipe corrosion. If the ux contains uorine, it will
damage the refrigerant oil.)
DANGER
• Use of oxygen may cause an explosion resulting in serious
injury or death. Only use nitrogen gas.
• Refrigerant gas may produce toxic gas if it comes in contact
with re such as from a fan heater, stove or cooking device.
Exposure to this gas could cause severe injury or death.
• Before brazing local refrigerant piping, nitrogen gas shall
be blown through the piping to expel air from the piping.
If brazing is done without nitrogen gas blowing, a large
amount of oxide lm develops inside the piping, and could
cause system malfunction.
• When brazing the refrigerant piping, only begin brazing
after having carried out nitrogen substitution or while insert-
ing nitrogen into the refrigerant piping. Once this is done,
connect the indoor unit with a ared or a anged connec-
tion.
• Nitrogen should be set to 2.9 psi (0.02 MPa) with a pres-
sure-reducing valve if brazing while inserting nitrogen into
the piping.
Refrigerant
piping Part to be
brazed
Taping
Pressure-
reducing
valve
Hands valve
Nitrogen
Nitrogen
NOTE
Usethearenutsattachedwiththeunit.
• Refer to Table 2 for tightening torque.
Table 2
Piping
size
[in. (mm)]
Tightening
torque
[lbf·ft. (N·m)]
Dimension for
processing are
A [in. (mm)]
Flare shape
f1/4
(6.4)
10.4 – 12.7
(15.7±1.5)
0.342 – 0.358
(8.9±0.2)
R0.016-0.031
90°±2°
A
45°±2°
f3/8
(9.5)
24.1 – 29.4
(36.3±3.6)
0.504 – 0.520
(13.0±0.2)
f1/2
(12.7)
36.5 – 44.5
(54.9±5.4)
0.638 – 0.654
(16.4±0.2)
f5/8
(15.9)
45.6 – 55.6
(68.6±6.8)
0.760 – 0.776
(19.5±0.2)
Not recommendable but in case of emergency
You must use a torque wrench but if you are obliged to
install the unit without a torque wrench, you may follow at
the installation method mentioned below.
Aftertheworkisnished,makesuretocheckthat
there is no gas leak.
When you keep on tightening the are nut with a span-
ner, there is a point where the tightening torque suddenly
increases. From that position, further tighten the are nut at
the angle shown below:
Table 3
Piping size
[in. (mm)]
Tightening
angle
Recommended arm length of
tool used [in. (mm)]
f1/4 (6.4) 60° – 90° Approx. 6 (150)
f3/8 (9.5) 60° – 90° Approx. 8 (200)
f1/2 (12.7) 30° – 60° Approx. 10 (250)
f5/8 (15.9) 30° – 60° Approx. 12 (300)
7. DRAIN PIPING WORK
Install the drain pipe as shown below. Improperly installed
piping could lead to leaks and eventually wet furniture
and belongings.
(1) Carry out the drain piping.
3/4 drain pipe
2 (50) or more
Drip pan
Metal clamp
(accessory) (2)
Drain hose
(accessory) (1)
Cut to suitable length
[length : in. (mm)]
Connect the drain
hose (1) using the
attached hose and
parts, as shown in
the right drawing.
Piping process
inside unit
Tilt
• If converging multiple drain pipes, install according to the
procedure shown below.
Slope downwards at a gradient
of at least 1/100
Select converging drain pipes whose gauge is suitable for the
operating capacity of the unit.
(2) After piping work is nished, check drainage ows
smoothly.
• Add approximately 1/4 gal (1L) of water slowly from the
air outlet and check drainage ow.
(3) Be sure to insulate all indoor pipes.
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8
3P086154-3R English
CAUTION
• Drain piping connections
Do not connect the drain piping directly to sewage pipes
that smell of ammonia.The ammonia in the sewage might
enter the indoor unit through the drain pipes and corrode
the heat exchanger.
• Keep in mind that it will become the cause of getting drain
pipe blocked if water collects on drain pipe.
8. ELECTRIC WIRING WORK
8-1 GENERAL INSTRUCTIONS
• Make sure that all electric wiring work is carried out by
qualied personnel according to the applicable legislation
and this installation manual, using a separate dedicated
circuit.
Insufcient capacity of the power supply circuit or improper
electrical construction may lead to electric shocks or a re.
• This equipment can be installed with a Ground-Fault Circuit
Interrupter (GFCI). Although this is a recognized measure
for additional protection, with the grounding system in North
America, a dedicated GFCI is not necessary.
• Do not turn on the power supply (branch switch, branch
overcurrent circuit breaker) until all the works are nished.
• Multiple number of indoor units are connected to one out-
door unit. Name each indoor unit as A-unit, B-unit ….. and
the like.When these indoor units are wired to the outdoor
unit and the Branch Selector unit, always wiring the indoor
unit to the terminal indicated with the same symbol on the
terminal block. If the wiring and the piping are connected
to the incorrect indoor units and operated, it will result in
malfunction.
• Make sure to ground the air conditioner.
Grounding resistance should be according to applicable
legislation.
• Do not connect the ground wiring to gas or water pipings,
lightning conductor or telephone ground wiring.
• Gas piping .................Ignition or explosion may occur if
the gas leaks.
• Water piping ..............Hard vinyl tubes are not effective
ground.
• Lightning conductor or telephone ground wiring..............
Electric potential may rise abnormally if struck by a light-
ning bolt.
• For electric wiring work, refer to also the WIRING DIA-
GRAM attached to the control box cover.
• Carry out wiring between the outdoor units, indoor units
and the remote controllers according to the wiring diagram.
• Carry out installation and wiring of the remote controller
according to the installation manual attached to the remote
controller.
• Do not touch the Printed Circuit Board assembly. It may
cause malfunction.
8-2 ELECTRICAL CHARACTERISTICS
Units Power
supply Fan motor
Model Hz Volts Voltage
range MCA MOP WFLA
FXLQ07 · 09MVJU,
FXNQ07 · 09MVJU
60 208-
230
Max. 253
Min. 187
0.3 15 15 0.2
FXLQ12MVJU,
FXNQ12MVJU
0.5 15 25 0.4
FXLQ18 · 24MVJU,
FXNQ18 · 24MVJU
0.6 15 35 0.5
MCA: Min. Circuit Amps (A); MOP: Max. Overcurrent Protective Device (A)
W: Fan Motor Rated Output (W); FLA: Full Load Amps (A)
8-3 SPECIFICATION FOR FIELD SUPPLY FUSES
AND WIRING
Power supply wiring Remote controller wiring
Transmission wiring
MOP Size Wiring Size
15A
Wiring size and
length must
comply with local
codes.
2-conductor,
stranded non-
shielded copper
cable PVC/vinyl
jacket (NOTE 2)
AWG
18-16
The lengths of remote controller wiring and transmission wir-
ings are as follows:
(1)
Remote controller wiring (indoor unit - remote controller)
........................................................Max. 1,640 ft. (500 m)
(2) Transmission wirings
................................ Total wiring length 6,560 ft. (2,000 m)
• Outdoor unit - Indoor unit
................................................. Max. 3,280 ft. (1,000 m)
• Outdoor unit - Branch Selector unit
................................................. Max. 3,280 ft. (1,000 m)
• Branch Selector unit - Indoor unit
................................................. Max. 3,280 ft. (1,000 m)
• Indoor unit - Indoor unit
................................................. Max. 3,280 ft. (1,000 m)
NOTE
1. Shows only in case of protected piping. Use H07RN-F in
case of no protection.
2. Vinyl cord with sheath or cable (Insulated thickness :
1/16in. (1 mm) or more).
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9. WIRING EXAMPLE AND HOW TO SET
THE REMOTE CONTROLLER
9-1 HOW TO CONNECT WIRINGS
• Remove the control box cover and connect the wirings.
USE COPPLE CONDUCTION
POWER SUPPLY
Control box
Power supply wiring,
ground wiring
(Field wiring)
Remote controller wiring
(Field wiring)
Transmission wiring
(Field wiring)
REMOTE
CNTRL
FORCED
OFF
TRANSMISSION
WIRING
F1
P1 P2 F2 T1 T2
L1
L2
Clamp
fastener
Clamp (6)
(accessory)
Cut off excess
after tightening
Conduit
Lock nut
NOTE
• For wiring to the control box, also see “Wiring Diagram”
label on the back of the control box cover.
• Do not confuse remote controller wiring and transmission
wiring when connecting to the terminal block.
• Fasten the wiring with accessory clamp (6).
• If mounting a remote
controller on the unit, wire
as shown in the gure on
the right.
WARNING
• Never connect power supply wiring to the terminal block
for remote controller wiring as this could damage the entire
system.
• Use only specied wire and connect wires to the terminal
tightly. Be careful wires do not place external stress on ter-
minals. Keep wires in neat order so as to not obstruct other
equipment. Make sure that the control box cover ts tightly.
Incomplete connections could result in overheating and, in
worse case, result in electric shock or re.
CAUTION
• To avoid a short circuit in the control box, be sure to apply
sealing material or putty (not included) to the wiring hole to
prevent the inltration of water as well as insects or other
small creatures. Otherwise a short-circuit may occur inside
the control box.
• When clamping the wirings, be sure no tension is applied
to the wire connections by using the included clamps. Also,
when wiring, make sure the control box cover ts snugly by
arranging the wirings neatly and attaching the control box
cover rmly. When attaching the control box cover, make
sure no wirings get caught in the edges. Pass the wirings
through the hole to prevent damage.
• Make sure the remote controller wiring, the wiring between
the units, and other electric wiring do not pass through the
same locations outside of the unit, separating them by at
least 5”, otherwise electric noise (external static) could
cause mistaken operation or breakage.
CAUTION FOR WIRING
• The indoor units in the same system can be connected to
the power supply from one branch switch. However, selec-
tion of branch switch, branch over current circuit breaker
and wiring size must be according to applicable legislation.
• For connection to the terminal block, use a ring type crimp
style terminals with insulation sleeve or insulate the wirings
properly.
Insulation sleeve
Ring type crimp
style terminals
Wiring
• If the above is not available, make sure to fulll the following
requirements.
Connection of 2
wirings of same
size must be
carried out on
both sides.
Connection of
wirings of
different sizes is
prohibited.
Connection of 2
wirings on one
side is
prohibited.
(Abnormal heating may occur if the wirings are not tight-
ened securely.)
• Use the required wirings, connect them securely and x
these wirings securely so that external force may not apply
to the terminals.
Pass through hole
of remote
controller
fastening plate.
Remote
controller wiring
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3P086154-3R English
• Use a proper screw driver for tightening the terminal
screws.
If an improper screw driver is used, it may damage the
screw head and a proper tightening cannot be carried out.
• If a terminal is over tightened, it may be damaged.
Refer to the table shown below for tightening torque of
terminals.
Tightening torque
[lbf·ft. (N·m)]
Terminal block for remote controller
and transmission wirings
0.65 ± 0.07
(0.88 ± 0.08)
Terminal for power supply 0.965 ± 0.095
(1.31 ± 0.13)
Ground terminal
• Do not carry out soldering nish when stranded wirings
are used.
9-2 WIRING EXAMPLE
• Fit the power supply wiring of each unit with a switch and
fuse as shown in the drawing.
COMPLETE SYSTEM EXAMPLE (3 systems)
Power supply wiring
Transmission wiring
Switch
Fuse/Breaker
Power supply
Main
switch
Remote controller
Indoor unit
Branch Selector
unit
(Only for
Heat
recovery system)
1.When using 1 remote controller for 1 indoor unit.
(Normal operation)
L1L2L1L2
IN/D OUT/D
F1F2F1F2
Control box
L1L2
F
1
P
2
P
1
F
2
T
1
T
2
F
1
F
2
T
1
T
2
F
1
F
2
T
1
T
2
F
1
F
2
T
1
T
2
L1L2
Outdoor unit
No. 1
System
Indoor
unit A
Indoor
unit B
Indoor
unit C
Most
downstream
indoor unit
Power supply
single phase
208/230 V
60 Hz
Power supply
single phase
208/230 V
60 Hz
Power supply
single phase
208/230 V
60 Hz
Power supply
single phase
208/230 V
60 Hz
L2L1L2L1L2L1L2L1
P
2
P
1
P
2
P
1
P
2
P
1
P
2
P
1
P
2
P
1
P
2
P
1
P
2
P
1
2. For group control or use with 2 remote controllers
Note: It is not necessary to designate
indoor unit address when using group
control.The address is automatically
set when power is activated.
L1L2L1L2L1L2
Control box
Outdoor unit
No. 2
System
Indoor
unit A
Indoor
unit B
Indoor
unit C
Most
downstream
indoor unit
For use with 2
remote controllers
IN/D OUT/D
F1F2F1F2
F 1 F 2 P 1 P 2 T 1 T 2 F 1 F 2 T 1 T 2 F 1 F 2 T 1
T 2
F 1 F 2 T 1 T 2
L2L1L2L1L2L1L2L1
Power supply
single phase
208/230 V
60 Hz
Power supply
single phase
208/230 V
60 Hz
Power supply
single phase
208/230 V
60 Hz
Power supply
single phase
208/230 V
60 Hz
L1L2
P
2
P
1
P
2
P
1
P
2
P
1
P 1 P 2 P 1 P 2 P 1 P 2
3.When including Branch Selector unit
IN/D OUT/D
F1F2F1F2
IN/DOUT/D
F1F2F1F2
L1L2
F 1 F 2 P 1 P 2 T 1 T 2
Branch
Selector
unit
No. 3
System
Outdoor unit
Indoor unit A Most
downstream
indoor unit
Control box
Control box
IN/DOUT/D
F1F2F1F2
Branch
Selector
unit
Control box
L1L2
F 1 F 2 T 1 T 2
L2L1L2L1
Power supply
single phase
208/230 V
60 Hz
Power supply
single phase
208/230 V
60 Hz
P 1 P 2
P 1 P 2
P 1 P 2
[ PRECAUTIONS ]
1. Do not ground the equipment on gas pipes, water pipes
or lightning rods, or crossground with telephones. Im-
proper grounding could result in electric shock.
WARNING
This equipment can be installed with a Ground-Fault
Circuit Interrupter (GFCI). Although this is a recognized
measure for additional protection, with the grounding
system in North America, a dedicated GFCI is not nec-
essary.
9-3 FOR CONTROL WITH 2 REMOTE CONTROL-
LERS (TO CONTROL 1 INDOOR UNIT WITH 2
REMOTE CONTROLLERS)
• For control with 2 remote controllers, set one remote con-
troller as Main and the other remote controller as Sub.
< Changeover method from Main to Sub and vice versa >
Refer to the installation manual attached to the remote
controller.
< Wiring method >
(1) Remove the control box cover.
(2) Carry out additional wiring from the remote controller
2 (Sub) to the terminals (P1, P2) for remote controller
wiring on the terminal block (X2M) in the control box.
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11 3P086154-3R English
Terminal for remote
controller wiring (P1, P2)
No polarity
Remote
controller 2
(Sub)
Remote
controller 1
(Main)
Terminal block
(X2M)
F2F1P2P1 T2T1
< Caution >
• When using the group control and the 2 remote control-
lers control at the same time, connect the remote con-
troller 2 (Sub) to the indoor unit at the end of the cross-
over wiring (the largest No.).
Indoor unit 1 Indoor unit 2
Indoor unit
largest No.
Remote
controller 2
(Sub)
Crossover
wiring (Remote
controller)
Remote
controller 1
(Main)
9-4 FOR CENTRALIZED CONTROL
• When centralized equipment (such as centralized control-
ler) is used for control, it is required to set the group No. on
the remote controller.
For details, refer to the manuals attached to the centralized
equipment.
• Connect the centralized equipment to the indoor unit con-
nected to the remote controller.
9-5 FOR REMOTE CONTROL (FORCE OFF OR ON /
OFF OPERATION)
(1) Wiringmethodandspecication
• Remote control is available by connecting the external
input to the terminal T1 and T2 on the terminal block for
remote controller and transmission wiring (X2M).
F2 T1 T2
FORCED
OFF
Input A
Wiring
specication
2-conductor,
stranded non-
shielded copper
cable/PVC or
vinyl jacket.
Gauge AWG18-16
Wiring length Max. 328 ft.
(100 m)
External
contact spec
Contact that can
make and break
the min. load of
15 V DC , 1 mA
(2) Actuation
• Input A of FORCED OFF and ON/OFF OPERATION
will be as the table shown below.
Input A = ON Input A = OFF
In case of FORCED
OFF
Remote controller
prohibited
Remote controller
permitted
In case of ON/OFF
OPERATION Operation Stop
(3) How to choose FORCED OFF or ON/OFF OPERA-
TION
• For choosing FORCED OFF or ON/OFF OPERATION,
setting by remote controller is required.
(Refer to 10.FIELDSETTING.)
10.FIELD SETTING
<<Refer to also the installation manual attached to the
outdoor unit.>>
CAUTION
Before carrying out eld setting, check the items mentioned in
Clause 2: a. Items to be checked after completion of work
on page3. Check if all the installation and piping works for
the air conditioner are completed.
• Check if the control box covers of the air conditioner are
closed.
< FIELD SETTING >
<<Afterturnonthepowersupply,carryouteldsetting
from the remote controller according to the installation
state.>>
• Carry out setting at 3 places, MODE NO., FIRST CODE
NO. and SECOND CODE NO.
The settings shown by in the table indicate those
when shipped from the factory.
• The method of setting procedure and operation is shown in
the installation manual attached to the remote controller.
(Note) Though setting of MODE NO. is carried out as a
group, if you intend to carry out individual setting by
each indoor unit or conrmation after setting, carry
out setting with the MODE NO. shown in the paren-
thesis ( ).
• In case of remote control, for changeover of input to
FORCED OFF or to ON/OFF OPERATION.
[1] Enter into the eld setting mode with the remote controller.
[2] Select MODE NO. 12.
[3] Set the FIRST CODE NO. to 1.
[4-1] For FORCE OFF, set the SECOND CODE NO. to 01.
[4-2] For ON/OFF OPERATION, set the SECOND CODE
NO. to 02.
(It is set to FORCE OFF when shipped from the factory.)
• Ask your customer to keep the manual attached to the
remote controller together with the operation manual.
• Do not carry out settings other than those shown in the
table.
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3P086154-3R English
11. TEST OPERATION
< TEST OPERATION >
• After cleaning the indoor unit inside, carry out test operation
according to installation manual attached to the outdoor
unit.
• When the remote controller operation lamp ashes, it
shows that something is abnormal.
Check the malfunction codes on the remote controller.
The relation between the malfunction codes and malfunc-
tion details is described in the operation manual attached to
the outdoor unit.
Particularly, if the indication is one of those shown in the
Table 4, it may be an error in the electrical wiring or the
power supply is disconnected.Therefore, recheck wiring.
Table 4
Remote controller
indication Details
Though the central-
ized control is not
carried out, the lamp
turns on.
• The terminals (T1 · T2) for FORCED OFF
on the indoor unit transmission terminal
block is short circuited.
[U4] displays.
[UH] displays.
• The power supply to the outdoor unit is not
made.
• The power supply work to the outdoor unit
is not carried out.
• The transmission wiring and the remote
controller wiring and FORCED OFF wiring
are connected incorrectly.
• The transmission wiring is disconnected.
No indication
• The power supply to the indoor unit is not
made.
• The power supply work to the indoor unit is
not carried out.
• The remote controller wiring and the trans-
mission wiring and FORCED OFF wiring
are connected incorrectly.
• The remote controller wiring is discon-
nected.
CAUTION
After test operation is completed, check the items men-
tioned in Clause 2: b. Items to be checked at time of
delivery on page4.
If the interior nish work is not completed when the test
operation is nished, for protection of the air con ditioner,
ask the customer not to operate the air conditioner until
the interior nish work is completed.
If the air conditioner is operated, the inside of the indoor
units may be polluted by substances generated from the
coating and adhesives used for the interior nish work
and cause water splash and leakage.
To the operator carrying out test operation
After test operation is completed, before delivering the
air conditioner to the customer, conrm that the control
box cover and the air lter are attached.
In addition, explain the power supply status (power sup-
ply ON/OFF) to the customer.
01_EN_3P086154-3R.indd 12 1/22/2015 2:28:13 PM

[1502] HT
3P086154-3R EM04A011B
00_CV_3P086154-3R.indd 2 1/19/2015 3:21:12 PM