LG MULTI V 5 ARUM160LTE5 Installation Manual page 36

36
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 Master Outdoor unit
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2
3 4 3 4
HR unit
In case of Heat Recovery System
Series outdoor units
When the power source is connected
In series between the units.
Outdoor
Power supply
(3 Ø 4wires)
[Master]
(Main Switch)
R S T N
Switch
Fuse
Indoor
Power supply
(1 Ø 2wires)
L N
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 Power Line
(2 Wires Cable) (2 Wires Cable) (2 Wires Cable)
In case of Heat
Recovery System
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.
When the power source is supplied to Each outdoor unit individually.
Outdoor
Power supply
(3 Ø 4wires)
(Main Switch)
R S T N R S T N R S T N
Switch Switch Switch Switch
Fuse Fuse Fuse
Indoor
Power supply
(1 Ø 2wires)
L N
Power Line
(2 Wires Cable)
Power Line
(4 Wires Cable)
Pull Box Pull Box
(Installer option) (Installer option)
HR unit
Power Line
(2 Wires Cable)
In case of Heat
Recovery System
Voltage range(V)
Frequency
Outdoor Indoor
60 Hz 380 V 220 V
50 Hz 380-415 V 220-240 V
Master
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.
Voltage range(V)
Frequency
Outdoor
60 Hz 380 V
50 Hz 380-415 V 220-240 V
[Slave1] [Slave2] [Slave3]
Communication Line
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
[Master] [Slave1] [Slave2]
R S T N
Fuse
Pull Box Pull Box
(Installer option) (Installer option)
Power Line Power Line Power Line
(2 Wires Cable) (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,
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 Master Outdoor unit
The communication cables between indoor unit and master outdoor
unit are possible to connect with BUS type or STAR type.
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A
3 4 3 4
HR unit
In case of Heat Recovery System
Indoor
220 V
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)
Example) Connection of transmission wire
[BUS type]
(2 Wires Cable)
- Connection of communication
cable must be installed like
below figure between indoor
unit to outdoor unit.
[Slave3]
Communication Line
(2 Wires Cable)
Master
DRY1 DRY2 GND 12V
Outdoor Unit SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A
3 4
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A
[STAR type]
- Abnormal operation can be
caused by communication
defect, when connection of
communication cable is installed
like below figure(STAR type).
Master
DRY1 DRY2 GND 12V
Outdoor unit
Slave1
DRY1 DRY2 GND 12V
Outdoor Unit
Slave2
DRY1 DRY2 GND 12V
Outdoor Unit
Slave3
DRY1 DRY2 GND 12V Outdoor Unit