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4
Wiring design
4-5. Design of control wiring
4-5-1. Summary of control wiring
Control wiring and central control wiring use 2-core non-polarity wires.
Use 2-core shield wires to prevent noise trouble.
In this case, for the system grounding, close (connect) the end of shield wires, and isolate the end of terminal.
Use 2-core non-polarity wire for remote controller. (A, B terminals)
Use 2-core non-polarity wire for wiring of group control. (A, B terminals)
U1 U2 U3 U4
U1 U2
U3 U4
U1 U2 A B
2
U
B
A
U1
U2
U1
A
2
U
B
U1
A B
B
A
B
A
B
A
Central controller
Outdoor unit
Control wiring between indoor and outdoor unit
(Shield wire)
Control wiring between indoor units (Shield wire)
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Remote controller
Remote controller
Remote controller
(Group control)
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