LG multi V ARUB160BT3 Instruction Manual page 66

Electrical Wiring
2. 460V
u Example Connection of Communication Cable
n 1 Outdoor Unit-3Ø, 460V
Power supply
3 Phase 3 Wires
60Hz 460V
(Main Switch)
Power supply
1 Phase 60Hz
208/230V
L(L1) N(L2)
ELCB
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
A 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.
66 Outdoor Unit
R(L1) S(L2) T(L3)
Switch
ELCB
Power Line
(3 Wires Cable)
Power Line
(2 Wires Cable)
Pull box
(Installer option)
HR unit
Power Line
(2 Wires Cable)
Master
IDU INT B INT A
Outdoor Unit
3(A) 4(B)
3(A) 4(B)
[Outdoor Unit]
Communication Line
Pull box
(Installer option)
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
3(A) 4(B)
(2 Wires Cable)
3(A) 4(B)