LG multi v Installation Manual page 59

575V
Example Connection of Communication Cable
1 Outdoor Unit-3Ø, 575V
Power supply
3 Phase 3 Wires
60Hz 575V
(Main Switch)
Power supply
1 Phase 60Hz
208/230V
L(L1) N(L2)
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 connec-
tion 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.
Between Indoor and Master Outdoor unit
SODU. B SODU. A
A B
HR unit
[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)
HR unit
Power Line
(2 Wires Cable)
IDU. B IDU. A CEN. B CEN. A DRY1 DRY2
3(A) 4(B) 3(A) 4(B)
Communication Line
(2 Wires Cable)
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
Master
GND 12V
Outdoor Unit
3(A) 4(B)
ELECTRICAL WIRING
3(A) 4(B)
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