LG Multi V ARUB Series Installation Manual page 50

Electrical Wiring
N Example Connection of Transmission Cable
1 Outdoor Unit
3 phase 4 wires
power supply
Single phase
power supply
HR unit
WARNING
• Indoor unit ground lines are required for preventing electrical shock accident in 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.
CAUTION
• You can install as below figure.
• The transmission cable of HR unit can be installed between indoor unit and indoor unit.
Outdoor unit control box
Central controller Indoor unit
C D Vcc GND A
The GND terminal is a '–' terminal for the central controller, not ground line
50 50 Outdoor Unit Outdoor Unit
Power supply switch
(Switch fuse)
B
3 4
HR unit
3 phase 4 wires power line
Transmission line (3 line): wired remote control
Single phase of power supply line
Transmission line (2 shield line): between indoor unit and outdoor unit
❈ Separate wiring drawing
3 4 3 4