English
1
VRV SYSTEM Inverter Air Conditioners
Installation manual
CONTENTS
1. SAFETY PRECAUTIONS................................................ 1
2. BEFORE INSTALLATION................................................ 2
3. SELECTING INSTALLATION SITE ................................. 3
4. PREPARATIONS BEFORE INSTALLATION ................... 4
5. INDOOR UNIT INSTALLATION....................................... 4
6. REFRIGERANT PIPING WORK ..................................... 5
7. DRAIN PIPING WORK .................................................... 6
8. ELECTRIC WIRING WORK ............................................ 7
9. WIRING EXAMPLE AND HOW TO SET
THE REMOTE CONTROLLER ....................................... 7
10. FIELD SETTING............................................................ 10
11. TEST OPERATION ....................................................... 10
The original instructions are written in English. All other lan-
guages are translations of the original instructions.
1. SAFETY PRECAUTIONS
Be sure to follow this “SAFETY PRECAUTIONS”.
This product comes under the term “appliances not accessible
to the general public”.
This is a class A product. In a domestic environment this prod-
uct may cause radio interference in which case the user may be
required to take adequate measures.
This manual classifies the precautions into WARNINGS and
CAUTIONS.
Be sure to follow all the precautions below: They are all impor-
tant for ensuring safety.
WARNING
............ Indicates a potentially hazardous situ-
ation which, if not avoided, could
result in death or serious injury.
CAUTION
.............. Indicates a potentially hazardous situa-
tion which, if not avoided, may result in
minor or moderate injury.
It may also be used to alert against
unsafe practices.
• After the installation is completed, test the air conditioner and
check if the air conditioner operates properly. Give the user
adequate instructions concerning the use and cleaning of the
indoor unit according to the Operation Manual. Ask the user
to keep this manual and the Operation Manual together in a
handy place for future reference.
WARNING
• Ask your local dealer or qualified personnel to carry out
installation work.
Improper installation may result in water leakage, electric
shocks or a fire.
• Perform installation work in accordance with this installation
manual.
Improper installation may result in water leakage, electric
shocks or a fire.
• Consult your local dealer regarding what to do in case of
refrigerant leakage.
When the air conditioner is installed in a small room, it is nec-
essary to take proper measures so that the amount of any
leaked refrigerant does not exceed the concentration limit in
the event of a leakage.
Otherwise, this may lead to an accident due to oxygen defi-
ciency.
• Be sure to use only the specified parts and accessories for
installation work.
Failure to use the specified parts may result in the air condi-
tioner falling down, water leakage, electric shocks, a fire, etc.
• Install the air conditioner on a foundation that can withstand
its mass.
Insufficient strength may result in the air conditioner falling
down and causing injury.
In addition, it may lead to vibration of indoor units and cause
unpleasant chattering noise.
• Carry out the specified installation work in consideration of
strong winds, typhoons, or earthquakes. Improper installa-
tion may result in an accident such as air conditioner falling.
• Make certain that all electrical work is carried out by qualified
personnel according to the applicable legislation (note 1) and
this installation manual, using a separate circuit.
In addition, even if the wiring is short, make sure to use a wir-
ing that has sufficient length and never connect additional
wiring to make the length sufficient.
Insufficient capacity of the power supply circuit or improper
electrical construction may lead to electric shocks or a fire.
(note 1) applicable legislation means “All international,
national and local directives, laws, regulations
and/or codes which are relevant and applicable for
a certain product or domain”.
• Earth the air conditioner.
Do not connect the earth wiring to gas or water piping, light-
ning conductor or telephone earth wiring.
Incomplete earthing may cause electric shocks or a fire.
A high surge current from lightning or other sources may
cause damage to the air conditioner.
• Be sure to install an earth leakage circuit breaker.
Failure to do so may cause electric shocks and a fire.
• Disconnect the power supply before touching the electric
components.
If you touch the live part, you may get an electric shocks.
• Make sure that all wiring is secure, using the specified wiring
and ensuring that external forces do not act on the terminal
connections or wiring.
Incomplete connection or fixing may cause an overheat or a
fire.
• When wiring between the indoor and outdoor units, and wir-
ing the power supply, form the wiring orderly so that the con-
trol box lid can be securely fastened.
If the control box lid is not in place, overheat of the terminals,
electric shocks or a fire may be caused.
• If refrigerant gas leaks during installation work, ventilate the
area immediately.
Toxic gas may be produced if refrigerant gas comes into con-
tact with a fire.
• After completing the installation work, check to make sure
that there is no leakage of refrigerant gas.
Toxic gas may be produced if refrigerant gas leaks into the
room and comes into contact with a source of a fire, such as
a fan heater, stove or cooker.
• Never directly touch any accidental leaking refrigerant. This
could result in severe wounds caused by frostbite.
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