– 15 –
Heat insulation process
Apply heat insulation for the pipes separately at liquid side and gas side.
y For the heat insulation to the pipes at gas side, be sure to use the material with heat-resisting temperature
120°C or higher.
y To use the attached heat insulation pipe, apply the heat insulation to the pipe connecting section of the indoor
unit securely without gap.
REQUIREMENT
y Apply the heat insulation to the pipe connecting section of the indoor unit securely up to the root without
exposure of the pipe. (The pipe exposed to the outside causes water leak.)
y Wrap heat insulator with its slits facing up (ceiling side).
Wrap the pipe with the attached heat insulator
without any gap between the indoor unit.
The seam must be faced upward
(ceiling side).
Flare nut
Indoor unit
Heat insulation
pipe
(Accessory)
Union Banding band
(locally
procured)
Heat insulator
of the pipe
WARNING
• Use the specified wires for wiring connect the terminals. Securely fix them to prevent external forces
applied to the terminals from affecting the terminals.
Incomplete connection or fixation may cause a fire or other trouble.
• Connect earth wire. (grounding work)
Incomplete grounding cause an electric shock.
Do not connect earth wires to gas pipes, water pipes, lightning conductor or telephone earth wires.
• Appliance shall be installed in accordance with national wiring regulations.
Capacity shortage of power circuit or incomplete installation may cause an electric shock or a fire.
• Under no circumstances, the power supply wire or the indoor and outdoor connecting wire must not be
connected in the middle (Connection using a solderless terminal etc.)
Connection trouble in the places where the wire is connected in the middle may give rise to smoking and/or a fire.
CAUTION
y For power supply specifi cations, follow the Installation Manual of outdoor unit.
y Do not connect 220 – 240V power to the terminal blocks (
A
,
B
) for control wiring.
Otherwise, the system will fail.
• Do not damage or scratch the conductive core and inner insulator of power and Indoor/Outdoor connecting
wires when peeling them.
• Perform the electric wiring so that it does not come to contact with the high-temperature part of the pipe.
The coating may melt resulting in an accident.
• Do not turn on the power of the indoor unit until vacuuming of the refrigerant pipes completes.
■ Wiring specifications
Indoor / Outdoor connecting wires specifications
Indoor unit power supplied from outdoor unit
• The outdoor unit power supply patterns vary on models.
Indoor unit power supply
1~50 Hz 220 - 240V
1~60 Hz 220V
Indoor / Outdoor connecting wires* 4 x 1.5 mm
2
or more (H07RN-F or 60245 IEC 66)* Up to 70 m
*Number of wire x wire size
*Including earth line
Remote controller wiring
Remote controller wiring, remote controller inter-unit wiring Wire size: 2 x 0.5 to 2.0 mm
2
Indoor / Outdoor connecting wires* In case of wired type only Up to 500 m
Total wire length of remote controller wiring and remote
controller inter-unit wiring = L + L1 + L2 + … Ln
2 remote controllers Up to 300 m
In case of wireless type included Up to 400 m
Total wire length of remote controller inter-unit wiring = L1 + L2 + … Ln Up to 200 m
* The remote controller wiring length differs depending on the remote controller used. For details, refer to the Installation Manual
attached to the remote controller.
CAUTION
The remote controller wire and Indoor/Outdoor connecting wires cannot be parallel to contact each other and
cannot be stored in the same conduits. If doing so, a trouble may be caused on the control system due to
noise or other factor.
8 Electrical connection
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