Wiring Method - Fujitsu AIRSTAGE AJY126GALH Installation Manual

6. 2.

Wiring method

The wiring example for RB units ,outdoor units and indoor units is shown in the fi gure.
To other refrigerant circuit
outdoor unit
Power supply
400V 3Ø 50Hz
N
Breaker
Outdoor unit 1
(Master unit)
N
Power supply
Transmission
RB unit
Power
supply
IN/U
L N
Breaker
Transmission
L N
Power supply
Indoor unit
230V 1Ø 50Hz
Power
Remote
supply
control
L N
Breaker
L N
Power supply Remote
230V 1Ø 50Hz control unit
• There are two types of remote controller: the 2-wire type and the 3-wire type. For details, see the relevant remote controller installation manual. (When connecting the 2-wire type
remote controller, Y3 is not used.)
Power supply Power supply
400V 3Ø 50Hz 400V 3Ø 50Hz
N
Breaker Breaker
Outdoor unit 2
(Slave unit 1)
N
Power supply Power supply
Transmission
RB unit
Power
supply
IN/U
L N
Breaker
Transmission
L N
Indoor unit
Power supply
230V 1Ø 50Hz
Remote
Power
control
supply
L N
Breaker
L N
Power supply Remote
controller
230V 1Ø 50Hz
N
Outdoor unit 3
(Slave unit 2)
N
Transmission
Transmission
Indoor unit
Power Remote Power
supply control supply
L N
L N
Breaker
Breaker
L N
L N
Power supply
Power supply Remote
230V 1Ø 50Hz
230V 1Ø 50Hz controller
(*1:Cooling only)
Refrigerant piping
Transmission Transmission
Indoor unit Indoor unit
Power
Remote
control supply
L N
Breaker
L N
Power supply
Remote
230V 1Ø 50Hz
controller
*1
Remote
control
Remote
controller
En-12