Sanyo Big PACi 18 Series Technical Data & Service Manual page 150

2-8. System Control
System control refers to the link wiring connection for control of simultaneous-operation multi systems,
group control, and mainsub remote controller control.
2-8-1. 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 3-phase outdoor unit: X, T, U, D Types)
Ground
Leakage breaker
Leakage breaker
Ground
(for 3-phase outdoor unit: XM Type)
Ground
Leakage breaker
Leakage breaker
Ground
System address rotary switch
(Set to "0" at the time of shipment.)
Outdoor unit
L1 L2 L3 N 1 2
Inter-unit control wiring
L
N
Indoor
U1
unit
U2
1
2
WHT BLK
Remote controller wiring
1 2
(Optional)
Wired remote
controller
System address rotary switch
(Set to "0" at the time of shipment.)
Outdoor unit
L1 L2 L3 N 1 2
Inter-unit control wiring
L
N
Indoor
unit
U1
U2
1
2
WHT BLK
Remote controller wiring
1 2
(Optional)
Wired remote
controller
For a simultaneous-operation multi
system, a maximum of 4 indoor units
can be connected to 1 outdoor unit.
L
N
Indoor
U1
unit
U2
1
2
Ground Ground
Remote controller crossover wiring
for group control
Fig. 2-5-1
For a simultaneous-operation multi
system, a maximum of 4 indoor units
can be connected to 1 outdoor unit.
L
N
Indoor
unit
U1
U2
1
2
Ground
Ground
Remote controller crossover
wiring for group control
Fig. 2-5-2
2-5
L
N
Indoor
U1
unit
U2
1
2
L
N
Indoor
U1
unit
U2
1
2
2