14
Power supply specifications
Power supply cord and communication wires are procured locally.
For the power supply specifications, follow to the table below.
If capacity is little, it is dangerous because overheat or seizure may be caused.
For specifications of the power capacity of the outdoor unit and the power supply wires, refer to the Installation
Manual attached to the outdoor unit.
Indoor unit power supply
(*1)
• For the power supply of the indoor unit, prepare the exclusive power supply separated from that of the outdoor unit.
• Arrange the power supply, earth leakage breaker, and main switch of the indoor unit connected to the same
outdoor unit so that they are commonly used.
• Power supply cord specification : Cable 3-core 2.5mm², in conformity with Design 60245 IEC 57.
Indoor/Outdoor inter-unit wiring, Central controller wiring
(*2) (*3)
• 2-core with polarity wires are used for the Indoor/Outdoor inter-unit wiring and Central controller wiring.
• To prevent noise trouble, use 2-core shield wire.
• The length of the communication line means the total length of the inter-unit wire length between indoor and
outdoor units added with the central control system wire length.
Remote controller wiring
(*4)
• 2-core with non-polarity wire is used for wiring of the remote controller wiring
and group remote controllers wiring.
Remote controller inter-unit wiring
Indoor unit
Remote
controller
Indoor unit
L1
L2
Ln
(Max. 8 units)
Indoor unit
Indoor unit
Remote
controller
wiring
Twist wire: 0.5mm
2
to 2.0mm
2
× 2
Total wire length of remote controller
wiring and remote controller inter-unit
wiring = L + L1 + L2 + … Ln
In case of wired type only
In case of wireless type included
Remote controller wiring, remote
controller inter-unit wiring
CAUTION
The remote controller wire
(Communication line) and
AC220–240V 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.
Total wire length of remote controller inter-unit wiring = L1 + L2 + … Ln
Up to 500m
Up to 400m
Up to 200m
Power supply (*1)
Communication line
220–240V
~
50Hz, 220V
~
60Hz
Twist wire : 2.0 mm²
Twist wire : 3.5 mm²
(Up to 1000m) Twist wire : 1.25 mm²
(Up to 2000m) Twist wire : 2.0
0
mm²
(Up to 1000m) Twist wire : 1.25 mm²
(Up to 2000m) Twist wire : 2.0
0
mm²
Twist wire : 0.5 to 2.0 mm²
Power supply
Power supply wiring
Indoor/Outdoor inter-unit wiring (*2)
(2 cables)
Central control line wiring (*3)
(2 cables)
Remote controller wiring (*4)
(2 cables)
Below 20m
Below 50m
Wire size
Wire size
Wire size
Power supply switch/Earth leakage breaker or power supply wiring/fuse rating for
indoor units should be selected by the accummulated total current values of the indoor units.
6
ELECTRIC WORK
