LG MULTI V Installation Manual page 59

Field Wiring(3Ø, 208/230V)
1. 60Hz
u Example Connection of Transmission Cable
n 1 Outdoor Unit - 3Ø, 208/230V
Power supply
3 Phase 3 Wires
60Hz 208/230V
(Main Switch)
Power supply Power supply
1 Phase 60Hz 1 Phase 60Hz
220~240V 220~240V
L N
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 prod-
uct 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 A
3 4
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 guidelineonly. 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
[Outdoor Unit]
R S T
Switch
ELCB
Power Line
(3 Wires Cable)
Power Line
(2 Wires Cable)
Pull Box Pull Box
(Installer option) (Installer option)
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
IDU INTERNET DRY1 DRY2 GND 12V
B A B A
3 4
Communication Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Master
Outdoor Unit
3 4
Electrical Wiring
Installation Manual 59