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Contents
1. The following should always be observed for safety .................... 2
2. Selecting the installation location ................................... 3
3. Installation diagram ............................................. 3
4. Refrigerant piping work .......................................... 4
5. Electrical work ................................................. 6
6. Maintenance .................................................. 7
1. The following should always be observed for safety
Caution:
Could lead to serious injury when operated incorrectly.
• After readingthismanual,besuretokeepittogether with the instruction
manualinahandyplaceonthecustomer’ssite.
: Indicates a part which must be grounded.
Warning:
Carefullyreadthelabelsafxedtothemainunit.
Warning:
■ Do not install the unit by yourself (user).
Improper or incomplete installation could cause re, electric shock, injury due to
the unit falling, or water leakage. Consult a qualied installer or the dealer from
whom you purchased the unit.
■ Followtheinstructionsdetailedintheinstallationmanual.
Incomplete installation could cause re or electric shock, injury due to the unit
falling, or leakage of water.
■ Install the unit securely in a place that can bear the weight of the unit.
If the installation location cannot bear the weight of the unit, the unit could fall
causing injury.
■ Performelectricalworkaccordingtotheinstallationmanualandbesureto
useanexclusivecircuit.Donotconnectotherelectricalappliancestothe
circuit.
If the capacity of the power circuit is insufcient or there is incomplete electrical
work, it could result in a re or an electric shock.
■ Ground the unit correctly.
Do not connect the ground wire to a gas pipe, water pipe, lightning rod or tel-
ephone ground. Defective grounding could cause electric shock.
■ Donotdamagethewires.
Damaged wires could cause re.
■ BesuretoshutoffthemainpowerwhensettinguptheindoorP.C.boardor
wiring.
Failure to do so could cause electric shock.
■ Usethespeciedwirestosecurelyconnecttheindoorandoutdoorunits.
Attachthewiresrmlytoavoidapplyingstresstotheterminalblock.
Improper connection could cause re.
■ Donotinstalltheunitinaplacewhereammablegasmayleak.
If gas leaks and accumulates around the unit, it could cause an explosion.
■ Do not use intermediate connection of the power cord or the extension
cord.DonotconnectmanydevicestooneACoutlet.
It could cause a re or an electric shock.
■ Usethepartsprovidedorspeciedpartsfortheinstallationwork.
The use of defective parts could cause an injury or leakage of water due to a re,
an electric shock, the unit falling, etc.
■ Securely attach the electrical cover to the indoor unit and the service panel
to the outdoor unit.
If the electrical cover of the indoor unit and/or the service panel of the outdoor
unit are not attached securely, dust, water, etc. could collect in the unit and could
cause a re or an electric shock.
■ Wheninstallingorrelocatingtheunit,makesurethatnosubstanceother
thanthespeciedrefrigerant(R410A)enterstherefrigerantcircuit.
Any foreign substances in the refrigerant circuit can cause abnormal pressure
rise or an explosion.
■ Donotdischargetherefrigerantintotheatmosphere.Checkthattherefrig-
erantgasdoesnotleakafterinstallationhasbeencompleted.Ifrefrigerant
leaksduringinstallation,ventilatetheroom.
If refrigerant comes in contact with a re, harmful gas could be generated.
If refrigerant gas leaks indoors, and comes into contact with the ame of a fan
heater, space heater, stove, etc., harmful gases will be generated.
■ Useappropriatetoolsandpipingmaterialsforinstallation.
The pressure of R410A is 1.6 times higher than R22. Not using the appropriate
tools and materials, or improper installation could cause the pipes to burst caus-
ing an injury.
■ Whenpumpingdowntherefrigerant,stopthecompressorbeforediscon-
necting the refrigerant pipes.
If the refrigerant pipes are disconnected while the compressor is running and the
stop valve is open, air could be drawn in and the pressure in the refrigeration cycle
could become abnormally high, causing the pipes to burst.
■ Wheninstallingtheunit,securelyconnecttherefrigerantpipesbeforestart-
ingthecompressor.
If the compressor is started before the refrigerant pipes are connected and the
stop valve is open, air could be drawn in and the pressure in the refrigeration cycle
could become abnormally high, causing the pipes to burst.
■ Fastenaarenutwithatorquewrenchasspeciedinthismanual.
If fastened too tight, a are nut could break and cause refrigerant leakage.
■ Install the unit according to national wiring regulations.
Caution:
■ Pleasefollowapplicablefederal,state,orlocalcodestopreventpotential
leakage/electricshock.Orinstallagroundfaultinterruptfortheprevention
ofleakageandelectricshock.
■ Perform the drainage/piping work securely according to the installation
manual.
If there is defect in the drainage/piping work, water could drip from the unit, and
damage household items.
• Pleaseprovideanexclusivecircuitfortheairconditioneranddonotconnect
other electrical appliances to it.
• Besuretoread“Thefollowingshouldalwaysbeobservedforsafety”before
installing the air conditioner.
• Be sure to observethe cautions specied here asthey include important
itemsrelatedtosafety.
• Theindicationsandmeaningsareasfollows.
Warning:
Could lead to death or serious injury.
■ Donottouchtheairinletorthealuminumnsoftheoutdoorunit.
This could cause injury.
■ Donotinstalltheoutdoorunitwheresmallanimalsmaylive.
If small animals enter the unit and damage its electrical parts, it could cause a
malfunction, smoke emission, or re. Keep the area around the unit clean.
VG79A964H01_EN.indd 2 2018/08/28 13:41:36
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