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10-8-2. Basic wiring diagram 2
Group control (when a central control device is not used)
●
Simultaneous-operation multi system
Up to 4 (Double-Twin) indoor units can be connected to 1 outdoor unit for operation.
(However, coordinate the outdoor unit capacity and the total capacity of the indoor units.)
(It is not possible to connect individual remote controllers for independent operation.)
A maximum of 8 indoor units can be connected to 1 remote controller.
When 2 or 3 indoor units are connected to each outdoor unit in the refrigerant system, set the system address
(refrigerant tubing system address) before turning on the remote power switch. (Refer to 10-8-3. Setting the out-
door unit system addresses.)
(Set using the system address rotary switch on the outdoor unit control PCB.)
(for single-phase outdoor unit)
Leakage breaker
Ground
Leakage breaker
Indoor
unit
Ground
DC̲Inverter̲Eng.indd 71
DC̲Inverter̲Eng.indd 71
System address rotary switch
(Change the setting.)
Leakage breaker
Outdoor unit
L
N
T
1 2
Inter-unit control wiring
L
L
Indoor
N
N
unit
U1
U1
U2
U2
Ground
1
1
2
2
Remote controller crossover
wiring for group control
WHT
BLK
1 2
Remote controller wiring
(Optional)
Wired remote
controller
Fig. 10-6-1
System address rotary switch
(Change the setting.)
Outdoor unit
Ground
L
N
1 2
Leakage breaker
L
Indoor
Indoor
N
unit
unit
U1
U2
Ground
Ground
1
2
71
Indoor power crossover
wiring – up to 16 units
(no-heater units only)
L
L
Indoor
N
N
unit
U1
U1
U2
U2
Ground
1
1
2
2
2007/07/25 13:21:49
2007/07/25 13:21:49
GB
FR
DE
IT
PT
GR
ES
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