Wiring Of Main Power Supply And Equipment Capacity; Field Wiring - LG ARUN BTE4 Series Installation Manual

CAUTION
!
If apparatus is not properly earthed then there is always a risk of
electric shocks, the earthing of the apparatus must be carried out by
a qualified person.
Wiring of main power supply and equipment
capacity
- Use a separate power supply for the Outdoor 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.
- Power supply cords of parts of appliances for outdoor use should not
be lighter than polychloroprene sheathed flexible cord.
- Don't install an individual switch or electrical outlet to disconnect
each of indoor unit separately from the power supply.
! 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.

Field Wiring

- Outdoor: 220-240 V3~ 50Hz / 220 V3~ 60Hz
- Indoor: 220-240 V~ 50Hz / 220 V~ 60Hz
Single outdoor unit
Power supply
3 Phase 3 Wires
[Outdoor Unit]
(Main Switch)
R S T
Switch
ELCB
Power supply
1Phase 2Wires
L N
Power Line
(3 Wires Cable)
Power Line
ELCB
(2 Wires Cable)
Pull Box Pull Box
(Installer option) (Installer option)
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
Communication Line
(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 Outdoor unit
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2
3 4 3 4
Series outdoor units
When the power source is connected
In series between the units.
Power supply
3 Phase 3 Wires
[Master] [Master]
(Main Switch)
R S T R S T
Switch Switch
ELCB
Power supply
1Phase 2Wires
L N
Power Line
(3 Wires Cable)
ELCB Power Line
(2 Wires Cable)
Pull Box Pull Box Pull Box Pull Box
(Installer option) ption) (Installer option) (Installer option) aller option)
Power Line Power Line Power Line
(2 Wires Cable) (2 Wires Cable) (2 (2 Wires Cable)
Communication Line mmunication Line
(3 Wires Cable) Cable)
[Indoor Units]
Communication Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
Master
GND 12V
Outdoor 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.
[Slave]
Commu Communication Line
(2 W (2 Wires Cable)
Po Power Line
(2 Wires Cable) (2
21