LG ARUM080LTE5, Engineering Product Data Book

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81
Multi V 5
Outdoor Units
5. Field Wiring
5.1 Heat Recovery System
̰
Example Connection of Communication Cable
 Single Outdoor Unit
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 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.
The GND terminal at the main PCB is a ‘-’ terminal for day contact, it is
not the point to make ground connection.
R S T N
Switch
Fuse
L
N
Communication Line
(2 Wires Cable)
Power Line
(4 Wires Cable)
Communication Line
(3 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
[Outdoor Unit]
[Indoor Units]
(Main Switch)
Pull Box
(Installer option) Pull Box
(Installer option)
Pull Box
(Installer option)
Outdoor
Power supply
(3Ø 4wires)
Indoor
Power supply
(1Ø 2wires)
Frequency
Voltage range(V)
Outdoor Indoor
60Hz 380 220
50Hz 380-415 220-240
HR unit
3 4
3 4
Between Indoor and Master Outdoor unit
Master
Outdoor Unit
SODU.B SODU.A IDU.B IDU.A CEN.B CEN.A DRY1 DRY2 GND 12V
HR unit
3(A) 4(B)