Wiring Of Main Power Supply And Equipment Capacity; Field Wiring - LG Multi V ARWN Series Installation Manual

24
Wiring of main power supply and equipment
capacity
- Use a separate power supply for the Outside Unit and Indoor Unit.
- Bear in mind ambient conditions (ambient temperature,direct sun-
light, rain water,etc.) when proceeding with the wiring and connec-
tions.
- The cable size is the minimum value for metal conduit wiring. The
power cord size should be 1 rank thicker taking into account the line
voltage drops. Make sure the power-supply voltage does not drop
more than 10%.
- Specific wiring requirements should adhere to the wiring regulations
of the region.
- Don't install an individual switch or electrical outlet to disconnect
each of indoor unit separately from the power supply.
The thickness of Minimum wire (mm
Main power
Branch wire Ground wire
wire
1 Unit 2.5~6
2 Unit 10~16
3 Unit 25~35
4 Unit 70
Ground wire
1
The power wire Between the master outside unit and slave1 out-
side unit - minimum : 6 mm
2
The power wire Between the slave1 outside unit and slave2 out-
side unit - minimum : 4 mm
3
The power wire Between the slave2 outside unit and slave3 out-
side unit - minimum : 2.5 mm
h Power supply cords of appliances for outside unit use shall not be
lighter than polychloroprene sheathed flexible cord
(code designation 60245 IEC 57).
h Please use the 3-phase 4-wire quadrupole Leakage circuit breaker of
circuit breaker.
! WARNING
• Follow ordinance of your governmental organization for techni-
cal 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 connec-
tions 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 ca-
pacity. Using fuse and wire or copper wire with too large capacity
may cause a malfunction of unit or fire.
2
)
Leakage cir-
cuit breaker
(4P ELCB)
Below 30~50A
- 2.5
100mA 0.1sec
Below 75~100A
- 2.5
100mA 0.1sec
Below 125~150A
- 4
100mA 0.1sec
Below 175~200A
- 6
100mA 0.1sec
2
2
2

Field Wiring

Single outside unit
Outside
Power supply
(3Ø 4wires)
(Main Switch) [Outside Unit]
R S T N
Switch
Fuse
Indoor
Power supply
(1Ø 2wires)
L N
Power cable
(4 Wires Cable)
Power cable
(2 Wires Cable)
Pull Box Pull Box
(Installer option) (Installer option)
Power cable Power cable
(2 Wires Cable) (2 Wires Cable)
Communication cable
(3 Wires Cable)
[Indoor Units]
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, mo-
mentary blackout or the power goes on and off while the product is
operating, attach a reversed phase protection circuit locally. Run-
ning the product in reversed phase may break the compressor and
other parts.
[Heat Pump]
Between Indoor and Master Outside unit
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2
3 4 3 4
Voltage range(V)
Frequency
Outside
60Hz 380V
50Hz 380-415V 220-240V
Communication cable
(2 Wires Cable)
Pull Box Pull Box
(Installer option) (Installer option)
Power cable Power cable
(2 Wires Cable) (2 Wires Cable)
Master
GND 12V
Outside unit
The GND terminal at the
main PCB is a '-' terminal
3 4
for day contact, it is not
the point to make ground
connection.
Indoor
220V