LG MULTI V IV ARUB080BTE4 Installation Manual page 26

26
! WARNING
When the total capacity is over than as follow, the power source
do not use in series between the units.
The First terminal block could be burnt out. (Heat Pump : 62 Hp)
When the power source is supplied to Each outdoor unit individually.
Power supply
3Phase 3wires
(Main Switch)
R S T R S T
Switch Switch Switch
Fuse Fuse Fuse
Power supply
1Phase 2wires
N
L
Power Line
(2 Wires Cable)
Power Line
(4 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
! 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.
Running the product in reversed phase may break the compressor
and other parts.
Between Indoor and Master Outdoor unit
Master
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V
Outdoor Unit
3 4 3 4 3 4
HR unit
The GND terminal at the main PCB is a '-' terminal for dry contact.
It is not the point to make ground connection.
- Make sure that terminal number of master and slave outdoor units
are matched.(A-A,B-B)
[Master] [Slave1] [Slave2]
R S T
Communication Line
(2 Wires Cable)
Pull Box Pull Box Pull Box
(Installer option) (Installer option) (Installer option)
HR unit
Power Line Power Line Power Line
(2 Wires Cable) (2 Wires Cable) (2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V
- Outdoor: 460 V3~ 60Hz
- Indoor: 220 V~ 50/60Hz
Single outdoor unit
Power supply
3Phase 3wires
(Main Switch)
R S T
Switch
Fuse
Power supply
1Phase 2wires
L N
Power Line
(4 Wires Cable)
Power Line
(2 Wires Cable)
Pull Box Pull Box
(Installer option) (Installer option)
HR unit
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
! 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.
Master
Between Indoor and Master Outdoor unit
Outdoor unit
Slave1
Outdoor Unit
SODU. B SODU. A IDU. B IDU. A CEN. B
Slave2
Outdoor Unit
3 4 3 4
Slave3 HR unit
Outdoor Unit
Series outdoor units
When the power source is connected
In series between the units.
Power supply
3Phase 3wires
(Main Switch)
R S T
Switch
Fuse
Power supply
1Phase 2wires
N
L
Power Line
(4 Wires Cable)
Power Line
(2 Wires Cable)
Pull Box Pull Box
(Installer option) (Installer option)
HR unit
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
[Outdoor Unit]
Communication Line
(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]
Master
CEN. A DRY1 DRY2 GND 12V
Outdoor Unit
The GND terminal at the
main PCB is a '-' terminal
3 4
for dry contact, it is not
the point to make ground
connection.
[Master] [Slave1] [Slave2]
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]
[Slave3]
Communication Line
(2 Wires Cable)