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6
ELECTRIC WORK
Power supply specifications
Power supply wiring and communication wiring are to be procured locally.
For the power supply specification, follow the table below. Ensure power supply is adequate. An insufficient power
supply could result in unit failure.
For specification of the power capacity of the outdoor unit and the power supply wires, refer to the Installation
Manual supplied with the outdoor unit.
Indoor unit power supply (*1)
Communication line
Indoor unit power supply
• Indoor unit power supply, must have a dedicated supply and be separate to that of the outdoor unit.
• Arrange the power supplies to the indoor and outdoor units, so that a common earth leakage breaker and main
switch can be used.
• Power supply cable specification : Cable 3-core 2.5 mm², in conformity with Design 60245 IEC 57.
Indoor/Outdoor inter-unit wiring, Central controller wiring
• Use a 2 core non polarity cable.
• To prevent any possible noise issues, use a shielded 2 core wire.
• The total stated length of communication wiring is determined by the interconnecting length of indoor to outdoor
cable plus the length of the central control communication cable.
Remote controller wiring
• For wiring remote controllers a 2 core polarity cable must be used.
Remote controller wiring, remote
controller inter-unit wiring
Total wire length of remote controller
wiring and remote controller inter-unit
wiring = L + L1 + L2 + ... Ln
Total wire length of remote controller inter-unit wiring = L1 + L2 + ... Ln
Indoor unit
Remote
controller
wiring
Remote
controller
Power supply
Power supply switch/Earth leakage breaker or power supply wiring/fuse rating for indoor
units should be selected by the accommodated total current values of the indoor units.
Power supply wiring
Indoor/Outdoor inter-unit wiring (*2)
Central control line wiring (*3)
Remote controller wiring (*4)
(*1)
(*4)
Twist wire: 0.5mm
In case of wired type only
In case of wireless type included
Indoor unit
L1
Remote controller inter-unit wiring
20 m or less
50 m or less
Q'ty
Wire size
Q'ty
Wire size
Q'ty
Wire size
(*2) (*3)
2
to 2.0 mm
2
× 2
Up to 500 m
Up to 400 m
Up to 200 m
Indoor unit
L2
(Max. 8 units)
15
220–240V, 1N ~ 50Hz
220V, 1N ~ 60Hz
Twist wire : 2.0 mm²
Twist wire : 3.5 mm²
2
(Up to 1000 m) Twist wire : 1.25 mm²
(Up to 2000 m) Twist wire :
2
(Up to 1000 m) Twist wire : 1.25 mm²
(Up to 2000 m) Twist wire :
2
Twist wire : 0.5 to 2.0 mm²
CAUTION
The remote controller wire
(Communication line) and AC220–
240V (Power supply) 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, etc.
Indoor unit
Ln
2.00
mm²
2.00
mm²
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