Pentax MMK-AP0121H Cable connection, Indoor unit power supply *1, Remote controller wiring

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

Total wire length of remote controller	In case of wired type only	Up to 500m
wiring and remote controller inter-unit
	In case of wireless type included	Up to 400m
wiring = L + L1 + L2 + … Ln
Total wire length of remote controller inter-unit wiring = L1 + L2 + … Ln		Up to 200m

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.

Remote controller wiring

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

Cable connection

REQUIREMENT

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

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

•Tighten the screws of the terminal block, and fix the cables with cord clamp attached to the electric parts box.

(Do not apply tension to the connecting section of the terminal block.)

Main P.C. board

10	R	S
	(L) (N)			R(L)	S(N)
			Power supply		U1 U2 A B X Y
				R(L)	S(N)
70		10	terminal block
			50
			2P

Earth line

Remote controller cable

Cord clamp

Connecting	Cord clamp	Power supply cable
cord	Inter-unit cable between indoor and outdoor units

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