LG ARUN80LN3 Installation Manual page 70

Electrical Wiring
■ 4 Outdoor Units - 3Ø, 380V
■ When the power source is connected In series between the units.
3 Phase 4 Wires
Power supply
60Hz 380V
(Main Switch)
R S T N
Switch
Fuse
Power supply
1 Phase 60Hz
220V
N
L
Power Line
(4 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)
WARNING
When the total capacity is over than as follow, the power source do not use in series between the units.
The First terminal block could be burnt out. (Heat Pump : 68 Hp, Cooling Only : 62 Hp)
■ When the power source is supplied to Each outdoor unit individually.
3 Phase 4 Wires
Power supply
60Hz 380V
(Main Switch)
R S T N
Switch
Fuse
Power supply
1 Phase 60Hz
220V
N
L
Power Line
(2 Wires Cable)
70 Outdoor Unit
[Master]
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
R S T N R S T N
Switch Switch
Fuse Fuse
Power Line
(4 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
[Slave1] [Slave2]
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
[Master]
R S T N
Switch
Fuse
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]
[Slave3]
Communication Line
(2 Wires Cable)
[Slave1] [Slave2]
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
[Slave3]
Communication Line
(2 Wires Cable)