LG MULTI V S ARUN060GSS4 Installation Manual page 25

Field Wiring
Single outdoor unit
1 Phase, 208/203 V, 60 Hz
Power supply switch
(Switch fuse : ELCB)
Power supply
1 Phase
208/230V, 60Hz
(Main Switch)
Power supply switch
(Switch fuse)
Power supply
1 Phase
208/230V, 60Hz
3 Phase, 208/203 V, 60 Hz
Power supply switch
(Switch fuse : ELCB)
Power supply
3 Phase
208/230V, 60Hz
(Main Switch)
Power supply switch
(Switch fuse)
Power supply
1 Phase
208/230V, 60Hz
Between Indoor and Master Outdoor unit
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2
3 4 3 4
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 discon-
nect 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, mo-
mentary 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.
• When using shielded wires, perform a single-point grounding
only to the outdoor unit for grounding of communication wires.
: Single phase of power supply line [L1(R), L2(S), L3(T)]
: Communication line (3 line): Wired remote control
: Communication line (2 shield line):
Between Indoor Unit and Outdoor Unit
Pull Box(Installer Option)
: Three phase of power supply line
[L1(R), L2(S), L3(T)]
: Communication line (3 line): Wired remote control
: Communication line (2 shield line):
Between Indoor Unit and Outdoor Unit
Pull Box(Installer Option)
Master
GND 12V
Outdoor Unit
3 4
Example) Connection of transmission wire
[BUS type]
- Connection of communication
cable must be installed like
below figure between indoor
unit to outdoor unit.
Example) Connection of power and communication cable
ARUN024GSS4
2 Ton
Front side
Main power
Terminal block
Insulation
sleeves
attachment
Ground wire
Conduit
Power/
Ground cable
Ground cable
[STAR type]
- Abnormal operation can be
caused by communication de-
fect, when connection of com-
munication cable is installed like
below figure(STAR type).
Right side
ODU-IDU
Communi-
cation cable
Power/
Over
50mm gap
25