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1-1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY
• Be sure to read these safety precautions and instructions.
• Besuretoobservethewarningsandcautionsspeciedhere.
• After reading this manual, be sure to store it with the OPERATING INSTRUCTIONS for future reference.
• Please report to your supply authority or obtain their consent before connecting this equipment to the power supply system.
CAUTION
(Could lead to serious injury when operated incorrectly.)
Required Tools for Installation
Tube benders
Phillips screwdriver
Level
Scale
Utility knife or scissors
3 in. (75 mm) hole saw
Torque wrench
Wrench (or spanner)
5/32 in. (4 mm) hexagonal
wrench
Flare tool for R410A
Gauge manifold for R410A
Vacuum pump for R410A
Charge hose for R410A
Pipe cutter with reamer
ENGLISH
When installing multi units, refer to the
installation manual of the multi unit for
outdoor unit installation.
CONTENTS
1. BEFORE INSTALLATION ......................1
2. INDOOR UNIT INSTALLATION .............4
3. OUTDOOR UNIT INSTALLATION ..........8
4. FLARE CONNECTION, PIPE
CONNECTION .......................................9
n Do not install the unit by yourself (user).
Improperorincompleteinstallationcouldcausere,electricshock,injury
duetotheunitfalling,orwaterleakage.Consultaqualiedinstallerorthe
dealer from whom you purchased the unit.
n Follow the instructions detailed in the installation manual.
Incompleteinstallationcouldcausereorelectricshock,injuryduetothe
unit falling, or leakage of water.
n When installing the unit, use appropriate protective equipment and tools
for safety.
Failure to do so could cause injury.
n 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.
n Perform electrical work according to the installation manual and be sure
to use an exclusive circuit. Do not connect other electrical appliances to
the circuit.
Ifthecapacityofthepowercircuitisinsufcientorthereisincompleteelectri-
calwork,itcouldresultinareoranelectricshock.
n Ground the unit correctly.
Do not connect the ground wire to a gas pipe, water pipe, lightning rod or
telephone ground. Defective grounding could cause electric shock.
If required, take measures against leakage current.
n Do not damage the wires.
Damagedwirescouldcausere.
n Be sure to shut off the main power when setting up the indoor P.C. board
or wiring.
Failure to do so could cause electric shock.
n Usethespeciedwirestosecurelyconnecttheindoorandoutdoorunits.
Attachthewiresrmlytoavoidapplyingstresstotheterminalblock.
Improperconnectioncouldcausere.
n Donotinstalltheunitinaplacewhereammablegasmayleak.
If gas leaks and accumulates around the unit, it could cause an explosion.
n Do not use intermediate connection of the power cord or the extension
cord. Do not connect many devices to one AC outlet.
Itcouldcauseareoranelectricshock.
n Usethepartsprovidedorspeciedpartsfortheinstallationwork.
The use of defective parts could cause an injury or leakage of water due to a
re,anelectricshock,theunitfalling,etc.
n When plugging the power supply plug into the outlet, make sure that there
is no dust, blockage, or loose parts both in the outlet and on the plug.
Verify that the power supply plug is completely in the outlet.
If there is dust, blockage, or loose parts on the power supply plug or the outlet,
itcouldcauseelectricshockorre.Ifloosepartsarefoundonthepowersupply
plug, replace it.
n 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
causeareoranelectricshock.
n When installing, relocating, or servicing the unit, make sure that no sub-
stanceotherthanthespeciedrefrigerant(R410A)enterstherefrigerant
circuit.
Any presence of foreign substance such as air can cause abnormal pressure
rise and may result in explosion or injury. The use of any refrigerant other
thanthatspeciedforthesystemwillcausemechanicalfailure,systemmal-
function, or unit breakdown. In the worst case, this could lead to a serious
impediment to securing product safety.
n Do not alter the unit.
Itmaycausere,electricshock,injuryorwaterleakage.
n Do not discharge the refrigerant into the atmosphere. Check that the
refrigerant gas does not leak after installation has been completed. If
refrigerant leaks during installation, ventilate the room.
Ifrefrigerantcomesincontactwithare,harmfulgascouldbegenerated.
Ifrefrigerantgasleaksindoors,andcomesintocontactwiththeameofa
fan heater, space heater, stove, etc., harmful gases will be generated.
n Use appropriate tools and piping materials for installation.
The pressure of R410A is 1.6 times higher than R22. Not using the appropri-
ate tools and materials, or improper installation could cause the pipes to
burst causing an injury.
n When pumping down the refrigerant, stop the compressor before discon-
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.
n When installing the unit, securely connect the refrigerant pipes before
starting the compressor.
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 refrig-
eration cycle could become abnormally high, causing the pipes to burst.
n Fastenaarenutwithatorquewrenchasspeciedinthismanual.
Iffastenedtootight,aarenutcouldbreakandcauserefrigerantleakage.
n Install the unit according to national wiring regulations.
n 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.
n Donottouchtheairinletorthealuminumnsoftheoutdoorunit.
This could cause injury.
n Do not install the outdoor unit where small animals may live.
If small animals enter the unit and damage its electrical parts, it could cause
amalfunction,smokeemission,orre.Keeptheareaaroundtheunitclean.
WARNING
(Could lead to death or serious injury.)
1. BEFORE INSTALLATION
5.
PURGINGPROCEDURES,LEAKTEST,
AND TEST RUN
.....................................10
6. PUMPING DOWN ................................10
RG79Y918H02_en.indd 1 2019/05/10 8:54:03
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