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11-8-2. Basic wiring diagram 2
Group control (when a central control device is not used)
● Simultaneous-operation multi system
A maximum of 8 indoor units can be connected to 1 remote controller.
Set the system address (refrigerant tubing system address) before turning on the remote power switch.
(Refer to 11-8-3. Setting the system addresses.)
(Set using the system address rotary switch on the outdoor unit control PCB.)
Fig. 11-6a
(Wiring procedure)
(1) Connect the remote controller to the indoor unit remote controller
wiring.
Use the remote controller connection wire coming from the
indoor unit, and field-supply wire and a wire joint to complete
the connection as shown in Fig. 11-6b. The remote controller
connection wire coming from the indoor unit includes a
connector, therefore cut off the connector and use the wire
joint to connect the wire from the remote controller.
(2) Connect the indoor units (U1, U2) and the outdoor units (1, 2).
Connect the other outdoor units and indoor units (with different
refrigerant systems) in the same way.
Connect the inter-unit control wiring to the indoor units (U1, U2)
for each refrigerant system.
(Inter-unit control wiring)
1
2
12L2
U1
RC
U2
L1 U2U1G
1
2
12L2
U1
RC
U2
L1 U2U1G
1
2
System address rotary switch
(Set to “0” at the time of shipment.)
Outdoor unit
Indoor
unit
Wired remote
controller
WHT
BLK
(Optional)
Remote controller wiring
(Field supply)
System address rotary switch
(Set to “0” at the time of shipment.)
Outdoor unit
Indoor
unit
Remote controller crossover wiring
for group control
Ground
Power supply
Single-phase
230 / 208 V
Inter-unit power line
230 / 208 V, 60 Hz
Ground
Power supply
Single-phase
230 / 208 V
Inter-unit power line
230 / 208 V, 60 Hz
1
2
Fig. 11-6b
1
2
RC RC RC
Indoor
unit 1
Indoor
unit 2
Indoor
unit 3
Wired remote
controller
WHT
BLK
(Optional)
07-115 SSHP_II 5/7/07 4:00 PM Page 109