LG Multi V PRHR033 Installation Manual page 37

When the power source is supplied to Each outdoor unit individually.
Power supply
3 Phase 3 Wires
60 Hz 460/575 V
(Main Switch)
R(L1) S(L2) T(L3) R(L1) S(L2) T(L3)
Switch Switch
ELCB ELCB
Power supply
1 Phase 60 Hz
208/230 V
L(L1) N(L2)
ELCB Power Line
Power Line
(3 Wires Cable)
(2 Wires Cable)
Pull box Pull box
(Installer option) (Installer option)
HR unit
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
NOTE
!
- Field Wiring diagram is to be used as a guideline only. Wiring
should comply with applicable local and national codes
- ELCB must have function to prevent electrical short and over
current at the same time.
- Use copper wires only.
- Unit must be grounded in compliance with the applicable local and
national codes.
- ELCB and fuse/breaker must install to the power line
WARNING
!
• Indoor Unit ground Lines 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(A) 4(B) 3(A) 4(B)
A B
HR unit
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1
• 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] [Slave]
Communication Line
(2 Wires Cable)
Pull box
(Installer option)
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
Master
GND 12 V
Outdoor Unit
3(A) 4(B) 3(A) 4(B)
Master
DRY2 GND 12 V
Outdoor Unit
Slave
DRY2 GND 12 V
Outdoor Unit
3 Outdoor Units-3Ø, 460 V / 575 V
When the power source is connected In series between the units.
Power supply
3 Phase 3 Wires
60 Hz 460/575 V
(Main Switch)
[Master]
R(L1) S(L2) T(L3)
Switch witch
ELCB ELCB
Power supply
1 Phase 60 Hz
208/230 V
L(L1) N(L2)
Power Line
(3 Wires Cable)
ELCB
Pow Power Line
(2 Wires Cable) (2 Wi
Pull Box Pull Box Pull Box
(Installer option) (Installer option) (Installer option)
Power Line Power Line Power L Power Line
(2 Wires Cable) (2 Wires Cable) (2 Wires Cable) (2 Wires Cable)
When the power source is supplied to Each outdoor unit individually.
Power supply
3 Phase 3 Wires
60Hz 460/575 V
(Main Switch)
R(L1) S(L2) T(L3) R(L1) S(L2) T(L3)
Switch Switch Switch
ELCB ELCB ELCB
Power supply
1 Phase 60 Hz
208/230 V
L(L1) N(L2)
ELCB
Power Line
(2 Wires Cable)
Power Line
(3 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 Lines 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.
[Slave1] [Slave1] [Slave2]
Communication Line
(2 Wires Cable)
Pull Box
(Installer option)
Power L P Power Line
(2 Wire (2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
[Master] [Slave1] [Slave2]
R(L1) S(L2) T(L3)
Communication Line
(2 Wires Cable)
Pull box
(Installer option)
Power Line Power Line
(2 Wires Cable) (2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
37