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ENGLISH
Installation Manual 49
Electrical Wiring
u Example Connection of Communication Cable
3 Outdoor Units
HR unit
HR unit
3 Phase 3 Wires Power line(R, S, T)>
Communication line (3 line): Wired remote control >
Single Phase of power supply line(L(1), L(2)) >
>
Communication line (2 shield line): >
Between Outdoor Unit and Outdoor Unit
Communication line (2 shield line): >
Between Indoor Unit and Outdoor Unit
Power supply switch>
(Switch fuse : ELCB)>
>
Power supply switch>
(Switch)>
>
Master
Slave1>
>
Slave2
Power supply switch>
(Switch fuse : ELCB)>
>
■ When the power source is supplied to!
Each outdoor unit individually.
3 Phase 3 Wires>
Power supply>
60Hz 208/230V
Power supply>
1 Phase 60Hz>
208/230V
Power supply switch>
(Switch)>
>
Power supply>
1 Phase 60Hz>
208/230V
(Main Switch)>
>
■ When the power source is supplied to!
Each outdoor unit individually.
3 Phase 3 Wires>
Power supply>
60Hz 208/230V
(Main Switch)>
>
Pull box(installer option)
Pull box(installer option)
HR unit
HR unit
The GND terminal is a '–' terminal for the central controller, not ground line
HR unit
Between Indoor and Master Outdoor unit>
>
Slave >
Outdoor unit>
>
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
Master >
Outdoor unit>
>
IDUSODU DRY1 DRY2 GND
INTERNET
BA
12V
IDUSODU DRY1 DRY2 GND
INTERNET
B
B
B
BA
A
A
A
12V
Master >
Outdoor unit>
>
3(A) 4(B) 3(A) 4(B)
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the equip-
ment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is
operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
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