Field Wiring - LG ZRUM080LTS6 Installation Manual

38

Field Wiring

Single outdoor unit
Outdoor
Power supply
(3 Ø 4 wires)
[Outdoor Unit]
(Main Switch)
R S T N
Switch
Fuse
Indoor
Power supply
(1 Ø 2 wires)
N
L
Power Line
(4 Wires Cable)
Power Line
(2 Wires Cable)
Pull Box Pull Box Pull Box
(Installer option) (Installer option) (Installer option)
HR unit
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
In case of Heat
Recovery System
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.
Between Indoor and Outdoor unit
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A
3 4 3 4
HR unit
In case of Heat Recovery System
The GND terminal at the main PCB is a '-' terminal for dry contact, it is
not the point to make ground connection.
Example) Connection of transmission wire
[BUS type]
- Connection of communication
cable must be installed like
below figure between indoor
unit to outdoor unit.
Voltage range(V)
Frequency
Outdoor Indoor
60 Hz 380 V 220 V
50 Hz 380-415 V 220-240 V
Communication Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
Outdoor Unit
DRY1 DRY2 GND 12V
3 4
[STAR type]
- Abnormal operation can be
caused by communication
defect, when connection of
communication cable is installed
like below figure(STAR type).
Example) Connection of power and communication cable
Bottom Side
When connecting
Main power lines
/ Ground wire from left side
Gap : Over
50 mm(1.97'')
When connecting
Communication wires
/ Ground wire from left side
Front Side
Main power line
connection
Main power
terminal block
Insulation
sleeves
attachments
Ground wire
CAUTION
!
It should be wiring power cables or communication cables to avoid
interference with the oil level sensor. Otherwise, That oil level sensor
would be operated abnormally.
Main power
terminal block
Ground wire
Main power
terminal block
Ground wire
When connecting
Communication wires
/ Ground wire from
Fix firmly with cable tie
front guide panel
or clamp cord not to be
Gap : Over displaced
50 mm(1.97'')
When connecting
Main power lines
/ Ground wire from
front guide panel
Communication/
Ground wire connection
Ground wire
ODU-IDU
Communication
cable
ODU-ODU
Communication
cable