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Electrical connection
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.
CAUTION
• If incorrect / incomplete wiring is carried out, it will cause an electrical fire or smoke.
• Install an earth leakage breaker that is not tripped by shock waves.
If an earth leakage breaker is not installed, an electric shock may be caused.
• Use the cord clamps attached to the product.
• Do not damage or scratch the conductive core and inner insulator of power and inter-connecting wires when peeling
them.
• Use the power cord and Inter-connecting wire of specified thickness, type, and protective devices required.
• Do not connect 220 V – 240 V power to the terminal blocks (
will fail.)
• Do not damage or scratch the conductive core and inner insulator of power and inter-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.
REQUIREMENT
• For power supply wiring, strictly conform to the Local Regulation in each country.
• For wiring of power supply of the outdoor units, follow the Installation Manual of each outdoor unit.
• 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.
• After connecting wires to the terminal blocks, provide a trap and fix wires with the cord clamp.
• Run the refrigerant piping line and control wiring line in the same line.
• Do not turn on the power of the indoor unit until vacuuming of the refrigerant pipes completes.
89-EN
,
,
,
) for control wiring. (Otherwise, the system
U
U
A
B
1
2
– 45 –
Power supply wire and communication wires specifications
Power supply wire 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 burnout 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
• For the power supply of the indoor unit, prepare the exclusive power supply separated from that of the outdoor
unit.
• Arrange the power supply, circuit breaker, and main switch of the indoor unit connected to the same outdoor unit
so that they are commonly used.
• Power supply wire specification: Cable 3-core 2.5 mm², in conformity with Design 60245 IEC 57.
▼ Power supply
Power supply
Power supply switch / circuit breaker or power supply wiring / fuse rating for indoor units should be selected by the
accumulated total current values of the indoor units.
Power supply wiring
Control wiring, Central controller wiring
• 2-core with polarity wires are used for the Control wiring between indoor unit and outdoor unit 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.
▼ Communication line
Control wiring between indoor units, and
outdoor unit (2-core shield wire)
Central control line wiring (2-core shield
wire)
220 V – 240 V ~, 50 Hz
220 V ~, 60 Hz
2
Below 20 m
2.5 mm
Below 50 m
4.0 mm
2
(Up to 1000 m) 1.25 mm²
Wire size
(Up to 2000 m) 2.0 mm²
(Up to 1000 m) 1.25 mm²
Wire size
(Up to 2000 m) 2.0 mm²
90-EN
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