En-9
7.3.3. Wiring method
The wiring example for RB units ,outdoor units and indoor units is shown in the
fi
gure.
Breaker shall be located in sight from and readily accessible from all RB units.
L1
L2
(N)
L1
L2
(N)
L1
L2
(N)
L1
L2
(N)
Breaker2
Breaker2
Breaker1
Breaker1
Power
supply
Power
supply
Outdoor unit
Transmission
IN/U
IN/U
RB unit
RB unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
(Cooling only)
Refrigerant piping
Refrigerant piping
Power supply
208/230V 1
60Hz
Power supply
208/230V 1
60Hz
Transmission
Transmission
Transmission
Transmission
Transmission
Breaker 1: Ground Fault Equipment
Breaker (GFEB)
Breaker 2: Maximum Circuit Breaker
(MAX. CKT. BKR)
Disconnect switch shall be installed between RB unit and pull box.
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.
GOOD
PROHIBITED
Refrigerant pipe
RB group 1
RB group 1
RB group 2
RB group 2
Transmission line
Transmission line
Crossover wiring of power supply
RB unit
RB unit
: Disconnect switch
: Pull box
Power
supply
Power
supply
Power
supply
Breaker2
Breaker1
Power supply
208/230V 1ø 60Hz
RB unit
RB unit
Power
supply
GOOD
PROHIBITED
Transmission line
RB group
RB group
Transmission line
Refrigerant pipe
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.
9366249030-05_IM.indb Sec1:9
9366249030-05_IM.indb Sec1:9
2015/2/26 13:11:33
2015/2/26 13:11:33