Field Wiring - LG ARUN050LMC0 Installation Manual

22
!
WARNING
• Follow ordinance of your governmental organization for
technical standard related to electrical equipment, wiring
regulations and guidance of each electric power company.
• Make sure to use specified cables for connections so that no
external force is imparted to terminal connections. If
connections are not fixed firmly, it may cause heating or fire.
• Make sure to use the appropriate type of overcurrent protection
switch. Note that generated overcurrent may include some
amount of direct current.
!
CAUTION
• Some installation site may require attachment of an earth leakage
breaker. If no earth leakage breaker is installed, it may cause an
electric shock.
• Do not use anything other than breaker and fuse with correct
capacity. Using fuse and wire or copper wire with too large capacity
may cause a malfunction of unit or fire.

Field Wiring

Example Connection of Communication Cable
Comp. Module
Power supply
(3N~ 4-wire)
Comp. Module
(Main Switch)
R S T N
Switch
Fuse
Indoor
Power supply
(1~ 2-wire)
N
L
Power cable
(4-wire Cable)
Power cable
(2-wire Cable)
Pull Box Pull Box
(Installer option) (Installer option)
Power cable Power cable
(2-wire Cable) (2-wire Cable)
Communication cable
(3-wire Cable)
Frequency
Comp. Module
50Hz 380~415V
[Heat Pump]
Between Indoor unit and Outside unit
Communication Cable Wiring
SODU.B SODU.A IDU.B IDU.A CEN.B
3 4
3 4
Hex.
Module
Indoor Unit
The GND terminal at the main PCB is a '-' terminal for dry contact, it is
not the point to make ground connection.
Hex. Module
Power supply
(1~ 2-wire)
Hex. Module
L N
Power cable
(2-wire Cable)
Communication cable
(2-wire Cable)
Pull Box Pull Box
(Installer option) (Installer option)
www.lgcomfortcooling.co.uk
Power cable Power cable
(2-wire Cable) (2-wire Cable)
[Indoor Units]
Voltage range(V)
HEX Module Indoor Unit
220~240V 220~240V
Compressor
CEN.A DRY1 DRY2 GND 12V
Module
3 4 3 4
Indoor Unit
Indoor Unit
!
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.
Example) Connection of transmission wire
[BUS type]
- Connection of communication
cable must be installed like
below figure between indoor
unit to outside unit.
Compressor Heat Exchanger
Module Module
Example) Connection of power and communication cable
- Case of Rear side pipe draw out.
- Case of Top side pipe draw out.
Power cable,
Communication cable
[STAR type]
- Abnormal operation can be
caused by communication
defect, when connection of
communication cable is installed
like below figure(STAR type).
Compressor Heat Exchanger
Module Module
Power cable,
Communication cable