LG ARUN038GS2 Installation Manual - Page 52

operating, attach a reversed phase protection circuit locally.

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Electrical Wiring x Example Connection of Communication Cable 3 Outdoor Units s When the power source is supplied to Each outdoor unit individually. 3 Phase 3 Wires Power supply 60Hz 460V (Main Switch) Power supply switch (Switch fuse : ELCB) Power supply switch (Switch fuse) Power supply 1 Phase 60Hz 208/230V HR unit Master Slave1 Slave2 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 Pull box(installer option) HR unit s When the power source is supplied to Each outdoor unit individually. 3 Phase 3 Wires Power supply 60Hz 460V (Main Switch) Power supply switch (Switch fuse) Power supply switch (Switch fuse : ELCB) Power supply 1 Phase 60Hz 208/230V HR unit Pull box(installer option) HR unit 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 equipment 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. Between Indoor and Master Outdoor unit SODU IDU INTERNET DRY1 DRY2 GND 12V Master BA BA Outdoor unit SODU IDU INTERNET DRY1 DRY2 GND 12V Master BA BA Outdoor unit HR unit 3(A) 4(B) 3(A) 4(B) SODU IDU INTERNET DRY1 DRY2 GND 12V Slave BA BA Outdoor unit The GND terminal is a '-' terminal for the central controller, not ground line 52 Outdoor Unit

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52
Outdoor Unit
◆
Example Connection of Communication Cable
3 Outdoor Units
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.
Electrical Wiring
HR unit
HR unit
Power supply switch
(Switch fuse)
Power supply switch
(Switch fuse)
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)
■
When the power source is supplied to
Each outdoor unit individually.
3 Phase 3 Wires
Power supply
60Hz 460V
Power supply
1 Phase 60Hz
208/230V
(Main Switch)
3 Phase 3 Wires
Power supply
60Hz 460V
Power supply
1 Phase 60Hz
208/230V
(Main Switch)
Master
Slave1
Slave2
Power supply switch
(Switch fuse : ELCB)
■
When the power source is supplied to
Each outdoor unit individually.
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
IDU
SODU
DRY1 DRY2 GND
INTERNET
B
A
12V
Master
Outdoor unit
IDU
SODU
DRY1 DRY2 GND
INTERNET
B
A
12V
IDU
SODU
DRY1 DRY2 GND
INTERNET
B
B
B
B
A
A
A
A
12V
Master
Outdoor unit
3(A)
4(B)
3(A)
4(B)