Fujitsu Airstage UTP-RX01AH Installation Manual page 9

7.3.3. Wiring method
The wiring example for RB units ,outdoor units and indoor units is shown in the fi gure.
Outdoor unit
Transmission
RB unit
Power
supply
IN/U
L N
Breaker
L N
Transmission
Power supply
230V 1 50Hz
Indoor unit
The transmission cable connects indoor units belonging to the same
RB group. The transmission cable cannot be used to connect indoor units
belonging to different RB groups.
Transmission line
Refrigerant pipe
RB group 1 RB group 2
GOOD
If using the indoor unit as a dedicated room cooling device, connect the
transmission terminal of the indoor unit to the "OUT/RB" terminal of RB unit or
outdoor unit transmission terminal.
Transmission line
Refrigerant pipe
RB group
GOOD
RB unit
Power
supply
IN/U
L N
Breaker
L N
Transmission
Power supply
230V 1 50Hz
Indoor unit
Transmission line
RB group 1 RB group 2
PROHIBITED
Transmission line
RB group
PROHIBITED
Refrigerant piping
Refrigerant piping
Transmission
Transmission
Indoor unit Indoor unit
Crossover wiring of power supply
RB unit
Power
supply
L N
Breaker
L N
Power supply
230V 1ø 50Hz
Transmission
Indoor unit
(Cooling only)
:Pull box
RB unit
Power
supply
L N L N
RB unit RB unit
Power Power
supply supply
L N
L N
En-8