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10
ELECTRICAL CONNECTION
• 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.
• For power supply specifications, follow the Installation Manual of outdoor unit.
• Do not connect 220 – 240 V 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 system
interconnection wires while 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.
System interconnection wires specifications
System interconnection wires*
*Number of wire × wire size
Remote controller wiring
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
The remote controller wire and system interconnection 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.
Indoor unit
Remote
L
controller
wiring
Remote
controller
WARNING
CAUTION
4 × 1.5 mm² or more
(H07 RN-F or 60245 IEC 66)
Wire size: 2 × 0.5 to 2.0 mm²
In case of wired type only
2 remote controllers
2 remote controllers including a
wireless remote controller
CAUTION
Indoor unit
L1
L2
Remote controller inter-unit wiring
‒ 24 ‒
Up to 500 m
Up to 300 m
Up to 400 m
Up to 200 m
Indoor unit
Ln
(max. 8 units)
Installation Manual
Up to 70 m
Indoor unit
24-EN
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