En-8
7.3.3. Wiring method
The wiring example for RB units ,outdoor units and indoor units is shown in the fi gure.
L
N
L
N
L
N
L
N
Breaker
Breaker
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
230V 1
50Hz
Power supply
230V 1 50Hz
TransmissionTransmission Transmission
Transmission Transmission
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
L
N
L
N
L
N
L
N
L
N
L
N
Crossover wiring of power supply
RB unit RB unit
:Pull box
Power
supply
Power
supply
Power
supply
Breaker
Power supply
230V 1ø 50Hz
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.
9366249047-03_IM.indb Sec1:89366249047-03_IM.indb Sec1:8 2015/3/10 14:27:482015/3/10 14:27:48
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