Power supply specifications

6 ELECTRIC WORK

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.

	Power supply		220–240V, 1N ~ 50Hz
	Power supply		220V, 1N ~ 60Hz
			220V, 1N ~ 60Hz

Indoor unit power supply (*1)	Power supply switch/Earth leakage breaker or power supply wiring/fuse rating for indoor
Indoor unit power supply (*1)	units should be selected by the accommodated total current values of the indoor units.
	Power supply wiring	20 m or less	Twist wire : 2.5 mm²
	Power supply wiring	50 m or less	Twist wire : 3.5 mm²
		50 m or less	Twist wire : 3.5 mm²
		Q’ty	2
	Indoor/Outdoor inter-unit wiring (*2)	Wire size	(Up to 1000 m) Twist wire : 1.25 mm²
			(Up to 1000 m) Twist wire : 1.25 mm²
			(Up to 2000 m) Twist wire : 2.00 mm²
			(Up to 2000 m) Twist wire : 2.00 mm²

Communication line		Q’ty	2
	Central control line wiring (*3)
		Wire size	(Up to 1000 m) Twist wire : 1.25 mm²


			(Up to 2000 m) Twist wire : 2.00 mm²
			(Up to 2000 m) Twist wire : 2.00 mm²

	Remote controller wiring (*4)	Q’ty	2

		Wire size	Twist wire : 0.5 to 2.0 mm²
		Wire size	Twist wire : 0.5 to 2.0 mm²

Indoor unit power supply (*1)

•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

(*2) (*3)

•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 (*4)

Cable connection

REQUIREMENT

•Be sure to locate the cable through the cable connection port of the indoor unit.

•Ensure additional wire length of approximately 100 mm at the indoor unit electric parts box. This is to enable ease of any service work in the future.

•The low-voltage circuit is provided for the remote controller.

•Remove the cover of the electric parts box by removing the mounting screws (3 pcs.) and push the hooking section. (The cover of the electric parts box remains hanged to the hinge.)

•Tighten the screws on the terminal block and secure the cables with cord clamp fitted to the electric parts box. (Do not apply tension to the connecting section of the terminal block.)

•Using the supplied thermal insulation for the sealing of the cable connecting port, seal the cable connecting port. (Otherwise dew condensation may be caused.)

•Mount the cover of the electric parts box ensuring the cables are not pinched. (Mount the cover after the ceiling panel has been wired to the electric box.)

Screws

	Electric parts box
P.C. board
Screw	Cover of electric parts box
Hooking section
Indoor/Outdoor
crossover cable/
Remote controller	Thermal insulation to cabling connecting port
terminal block	Thermal insulation to cabling connecting port

• For wiring remote controllers, a 2 core polarity cable must be used.

Remote controller wiring, remote

CAUTION

	U1 U2 A B
	10	R S
	10	(L) (N)
		(L) (N)

controller inter-unit wiring	Twist wire: 0.5mm2	to 2.0 mm2	× 2
controller inter-unit wiring

Total wire length of remote controller	In case of wired type only	Up to 500 m
wiring and remote controller inter-unit
wiring and remote controller inter-unit	In case of wireless type included	Up to 400 m
wiring = L + L1 + L2 + … Ln	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 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.

Power supply terminal block

R(L) S(N)

Earth line

Connecting cord

10 50

Adhered surface

Heat insulator A

	Indoor unit		Indoor unit		Indoor unit		Indoor unit
Remote
Remote
controller		L1		L2		Ln
wiring		L1		L2		Ln
wiring	Remote	Remote controller inter-unit wiring				(Max. 8 units)
	Remote					(Max. 8 units)
	controller
	controller

Cord clamp

Heat insulator B

Notched section

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