Sanyo Big PACi 18 Series Technical Data & Service Manual page 151

2-8-2. 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
2
(refrigerant tubing system address) before turning on the remote power switch.
(Refer to 2-8-3. Setting the outdoor unit system addresses.)
(Set using the system address rotary switch on the outdoor unit control PCB.)
(for 3-phase outdoor unit: X, T, U, D Types)
Ground
Leakage breaker
Leakage breaker
Remote controller
wiring
(for 3-phase outdoor unit: XM Type)
Ground
Leakage breaker
Leakage breaker
System address rotary switch
Change the setting.)
Leakage breaker
Outdoor unit
L1 L2 L3 N 1 2
Inter-unit control wiring
L L
Indoor Indoor
N
N
unit unit
U1 U1
U2 U2
Ground Ground
1 1
2 2
WHT BLK
1 2
(Optional)
Wired remote controller
System address rotary switch
(Change the setting.)
Leakage breaker
Outdoor unit
L1 L2 L3 N 1 2
Inter-unit control wiring
L L
Indoor Indoor
N N
unit unit
U1 U1
U2 U2
Ground
Ground
1 1
2 2
WHT BLK
1 2
Remote controller wiring
(Optional)
Wired remote
controller
Ground
System address rotary switch
(Change the setting.)
Outdoor unit
L1 L2 L3 N 1 2
Leakage breaker
L
Indoor
Indoor
N
unit unit
U1
U2
Ground
Ground
1
2
Remote controller crossover
wiring for group control
Fig. 2-6-1
Ground
System address rotary switch
(Change the setting.)
Outdoor unit
L1 L2 L3 N 1 2
Leakage breaker
L
Indoor Indoor
N
unit unit
U1
U2
Ground
Ground
1
2
Remote controller crossover wiring
for group control
Fig. 2-6-2
2-6
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
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