Field Wiring - LG MULTI V IV PRO JRUN180LLS4 Installation Manual

ELECTRICAL WIRING
56

Field Wiring

Single outdoor unit
Outdoor
Power supply
3Ø 4-wire
(Main Switch)
Indoor
Power supply
(1Ø 2-wire)
N
L
Power cable
(2-Wires Cable)
Pull Box
(Installer option)
Power cable
(2-Wires Cable)
WARNING
!
• Indoor Unit ground wires 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 SODU.A IDU.B IDU.A CEN.B CEN.A
3 4 3 4
[Outdoor Unit]
R S T N
Switch
Fuse
Power cable
(4-Wires Cable)
Pull Box Pull Box
(Installer option) (Installer option)
Power cable Power cable
(2-Wires Cable) (2-Wires Cable)
Communication cable
(3-Wires Cable)
[Indoor Units]
The GND terminal at the main PCB is a '-'
Master
DRY1 DRY2 GND 12V
terminal for day contact, it is not the point to
Outdoor
Unit
make ground connection.
3 4
Voltage range(V)
Frequency
Outdoor Indoor
60 Hz 380 V 220 V
50 Hz 380-415 V 220-240 V
Communication cable
(2-Wires Cable)
Pull Box
(Installer option)
Power cable
(2-Wires Cable)