Panasonic R410A Installation Instructions Manual page 36

8-8-2. 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 8-8-3. Setting the system addresses.)
(Set using the system address rotary switch on the outdoor unit control PCB.)
Ground
Power supply
230 / 208 V
1-PH
1
2
Indoor
unit
U1
U2
RC
WHT
(Optional)
Wired Remote
Controller
(Wiring procedure)
(1) Connect the remote controller to the indoor unit remote control
wiring.
Use the remote control connection wire coming from the
indoor unit, and fi eld-supply wire and a wire joint to complete
the connection as shown in Fig. 8-6b. The remote control
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)
System address rotary switch
(Set to "0" at the time of shipment.)
Outdoor unit
L1 L2 1 2 G U1 U2
Power supply
230 / 208 V
1-PH
Remote control wiring
BLK
(Field supply)
1 2
Fig. 8-6a
36
System address rotary switch
(Set to "0" at the time of shipment.)
Outdoor unit
L1 L2 1 2 G U1
Ground
1
2
Indoor
unit
U1
U2
RC
Control wiring for group control
Indoor Indoor
unit 1 unit 2
RC RC
WHT BLK
1 2
(Optional)
Wired Remote
Controller
Fig. 8-6b
U2
Indoor
unit 3
RC