LG ARWB80LA2 Installation Manual page 50

N Example Connection of Transmission Cable
2 Outside Units
I When the power source is connected
In series between the units.
3 Phase 4 Wires
Power supply
50Hz 380~415V
(Main Switch)
Power supply
1 Phase 50Hz
220~240V
HR unit
Power supply switch
(Switch)
I When the power source is supplied to
Each outdoor unit individually.
3 Phase 4 Wires
Power supply
50Hz 380~415V
(Main Switch)
Power supply switch
(Switch)
Power supply
1 Phase 50Hz
220~240V
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Transmission 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 prod-
uct 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
B A B A
HR unit
The GND terminal is a '–' terminal for the central controller, not Ground Line
• Make sure that terminal number of master and slave outdoor units are matched.(A-A,B-B)
50 Outside Unit
Power supply switch
(Switch fuse : ELCB)
Power supply switch
(Switch fuse : ELCB)
HR unit
DRY1 DRY2 GND 12V
Master
Outdoor unit
Master
3 Phase 4 Wires Power line(R, S, T, N)
Slave
Transmission line (3 line): Wired remote control
Single Phase of power supply line(L, N)
Transmission line (2 shield line):
Between Outdoor Unit and Outdoor Unit
Transmission line (2 shield line):
Between Indoor Unit and Outdoor Unit
Pull Box(Installer option)
HR unit
HR unit
SODU IDU INTERNET DRY1 DRY2 GND
B A B A
SODU IDU INTERNET DRY1 DRY2 GND
B A B A
Electrical Wiring
Pull Box(Installer option)
12V
Master
Outdoor unit
12V Slave
Outdoor unit