LG multi V ARUB160BT3 Instruction Manual page 61

Field Wiring
1. 208/230V
u Example Connection of Communication Cable
n 1 Outdoor Unit-3Ø, 208/230V
Power supply
3 Phase 3 Wires
60Hz 208/230V
(Main Switch)
Power supply
1 Phase 60Hz
208/230V
L(L1) N(L2)
ELCB
(2 Wires Cable)
Pull box
(Installer option)
Power Line
(2 Wires Cable)
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 B SODU A IDU IDU
A B 3(A) 4(B)
HR unit
The GND terminal at the main PCB is a '-' terminal for Dry contact, it is not the point to make
ground connection.
[Outdoor Unit]
R(L1) S(L2) T(L3)
Switch
ELCB
Power Line
(3 Wires Cable)
Power Line
Pull box Pull box
(Installer option) (Installer option)
HR unit
Power Line
(2 Wires Cable) (2 Wires Cable)
Master
INT B INT A
Outdoor Unit
3(A) 4(B)
Communication Line
(2 Wires Cable)
Power Line Power Line
(2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
3(A) 4(B) 3(A) 4(B)
Electrical Wiring
Installation Manual 61