47
10-8. System Control
System control refers to the link wiring connection for control of
simultaneous-operation multi systems, group control, and main-
sub remote controller control.
10-8-1. Basic wiring diagram 1
Single type and simultaneous-operation multi system
●
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.)
●
Be careful to avoid miswiring when connecting the wires.
(Miswiring will damage the units.)
(for single-phase outdoor unit)
1
2
12
1
2
U2 U1
0
L
N
N
U1
U2
1
2
L
L
N
1
2
U2 U1
L
N
System address rotary switch
(Set to “0” at the time of shipment.)
Inter-unit control wiring
Ground
Outdoor unit
Leakage breaker
Ground
Ground
WHT
BLK
Indoor
unit
Indoor
unit
Indoor
unit
Ground
(Optional)
Wired remote
controller
Leakage breaker
For a simultaneous-operation multi
system, a maximum of 4 indoor units
can be connected to 1 outdoor unit.
Remote controller communication
wiring for group control
Remote controller wiring
Fig. 10-5
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 outdoor unit system
addresses.)
(Set using the system address rotary switch on the outdoor
unit control PCB.)
(for single-phase outdoor unit)
1
2
1
2
1
2
U2 U1
1
2
U2 U1
1
2
U2 U1
12
1
2
L
N
L
N
L
N
T
N
LN
L
1
2
U2 U1
L
N
L
N
1
2
U2 U1
System address rotary
switch
(Change the setting.)
Inter-unit control wiring
Ground
Outdoor unit
Ground
Ground
Leakage breaker
Remote controller communication
wiring for group control
Remote controller
wiring
Indoor
unit
WHT
BLK
(Optional)
Wired remote controller
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Ground
Ground
Ground
Leakage breaker
Leakage breaker
System address rotary
switch
(Change the setting.)
Outdoor unit
Leakage breaker
Indoor power crossover
wiring – up to 16 units
(no-heater units only)
Ground
Fig. 10-6
Airwell̲PAC-i̲eng.indb 47
Airwell̲PAC-i̲eng.indb 47
2009/07/09 16:13:35
2009/07/09 16:13:35
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