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Gas leak inspection
Use a leak detector manufactured specially for HFC refrigerant
(R32, R410A, R134a, etc.) to perform the R32 gas leak inspection.
* Leak detectors for conventional HCFC refrigerant (R22, etc.)
cannot be used, as the sensitivity drops to approximately 1/40
when used for HFC refrigerant.
R32 has a high working pressure, so failure to perform the installation
work properly may result in gas leaks such as when the pressure
rises during operation. Be sure to perform leak tests on the piping
connections.
Insulating the Pipes
The temperatures at both the liquid side and gas
side will be low during cooling so in order to prevent
condensation, be sure to insulate the pipes at both
of these sides.
Insulate the pipes separately for the liquid side and
gas side.
Insulate the branch pipes by following the
instructions in the installation manual provided with
the branch pipe kit.
Indoor unit inspection locations
(piping connections)
Refrigerant
piping
Indoor unit side piping
Outdoor unit inspection locations
REQUIREMENT
Be sure to use an insulating material which can
withstand temperatures above 120°C for the gas
side pipe since this pipe will become very hot during
heating operations.
– 11 –
6
Electrical work
WARNING
1
Using the specified wires, ensure that the
wires are connected, and fix wires securely
so that the external tension to the wires
does not affect the connecting part of the
terminals.
Incomplete connection or fixation may cause
a fire, etc.
2
Be sure to connect the earth wire.
(grounding work)
Incomplete grounding may lead to electric
shock.
Do not connect ground wires to gas pipes,
water pipes, lightning rods or ground wires for
telephone wires.
3
The appliance shall be installed in
accordance with national wiring
regulations.
Capacity shortages of the power circuit or an
incomplete installation may cause an electric
shock or fire.
CAUTION
An installation fuse must be used for the power
supply line of this air conditioner.
Incorrect / incomplete wiring may lead to an
electrical fire or smoke.
Prepare an exclusive power supply for the air
conditioner.
This product can be connected to the mains power.
Fixed wire connections:
A switch that disconnects all poles and has a
contact separation of at least 3 mm must be
incorporated in the fixed wiring.
Be sure to use the cord clamps attached to the
product.
Do not damage or scratch the conductive core
or inner insulator of the power and system
interconnection wires when peeling them.
Use the power and system interconnection wires
with specified thicknesses, specified types and
protective devices required.
Remove the service panel, and you can see electric
parts on the front side.
A conduit pipe can be installed through the hole for
wiring. If the hole size does not fit the wiring pipe to
be used, drill the hole again to an appropriate size.
Be sure to clamp the power wires and system
interconnection wires with a banding band along the
connecting pipe so that the wires do not touch the
compressor or discharge pipe.
(The compressor and the discharge pipe become
hot.)
Service panel
Cord clamp
Pipe hole
Wiring between indoor unit
and outdoor unit
The dashed lines show on-site wiring.
(System
(Main circuit)
interconnection wires)
L
1
1
Input power
N
2
2
Remote
3
3
controller
Outdoor unit
Indoor unit
Earth
Circuit
breaker
Connect the system interconnection wires to the
identical terminal numbers on the terminal block of
each unit.
Incorrect connection may cause a failure.
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