LG MULTI V Installation Manual page 64

Electrical Wiring
Field Wiring(3Ø, 460V)
1. 60Hz
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
220~240V
N
L
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.
[Heat Pump]
Between Indoor and Master Outdoor unit
SODU
B
3
The GND terminal at the main PCB is a - terminal for day contact, it is not the point to make
ground connection.
Note
1) Field Wiring diagram is to be used as a guideline only. Wiring should comply with applicable local and national codes
2) ELCB must have function to prevent electrical short and over current at the same time .
3) Use copper wires only.
4) Unit must be grounded in compliance with the applicable local and national codes.
5) ELCB and fuse/breaker must install to the power line
64 Outdoor Unit
[Outdoor Unit]
R S T
Switch
ELCB
Power Line
(3 Wires Cable)
Power Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
IDU INTERNET DRY1 DRY2 GND 12V
A
A B B A
4 3 4
Communication Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
Master
Outdoor Unit
3 4