Electrical Wiring - Sanyo C4272R S/C Installation Instructions Manual

07-115 SSHP_II 5/7/07 4:00 PM

8-2. Electrical Wiring

How to connect electrical wiring
(1) Connect B1, B2 to indoor PCB CRV connector
using accessary 2P connector. (*No polarity)
Total wire length is less than 985 ft. and size is
AWG#18.
(2) Connect B5, B6 to indoor unit 2P terminal base.
(*No polarity). Wire size is AWG#18.
Basic wiring
B1:
Power supply: DC12V *No polarity
To CRV connector (CN91) on indoor PCB
B2:
B3: Not be used
B4: Auxiliary of inter-unit control wiring
B5:
Inter-unit control wiring. (Low voltage)
To indoor unit 2P terminal base (U1, U2)
B6:
*No polarity
Terminals for remote monitoring
A1: Input for turning on air conditioners concurrently.
A2: Input for turning off air conditioners concurrently.
A3: Common input for turning air conditioners on or off.
A4: ON operation state indicator output.
A5: Alarm indicator output.
A6: Common indicator output.
Basic wiring diagram of control wiring
SC
A max. of 64 indoor units and 30 outdoor units
can be connected in 1 system.
Up to 10 system controllers can be connected
in 1 system.
Page 86
B1
B2
B3
Wire joint connection
B4
B5
B6
2P terminal base
System controller
Fig. 8-3
<Back side of system controller>
A1
A2
A3
A4
A5
A6
Fig. 8-4
RC1 RC2
Inter-unit
control wiring
1-1 2-1
86
Indoor unit PCB
CRV
(CN91: WHT)
Accessary connector
U1
U2
Indoor unit
B6
B5
B4
B3
B2
B1
RC3
3-1
System controller