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TO 115 VAC
POWER SUPPLY
FUSE
L1 (HOT)
1
L2 (N)
2
115 VAC
TRANSFORMER
24 VAC
DENOTES LINE VOLTAGE WIRING
DENOTES LOW VOLTAGE WIRING
Fig. 5. Typical ST9120B,U wiring connections in ST9160 system with SV9510/SV9520 SmartValve™ Control.
HUMIDIFIER
5
J3
J1
3
C G
C G Y W R
THERMOSTAT
1
THERE MUST BE 115 VAC CONNECTED TO L1 (HOT) ON ST9120U, ST9120B.
2
APPLIANCE CHASSIS MUST HAVE RELIABLE CONNECTION TO EARTH GROUND.
3
JUMPER PLUG MUST BE ATTACHED TO J1 CONNECTOR.
4
CONNECT ONLY IF CONTINUOUS SPEED IS AVAILABLE AND USED.
5
CONNECT ONLY IF CONTINUOUS SPEED IS NOT USED
ST9120B,U UNIVERSAL ELECTRONIC FAN TIMERS
AIR CLEANER
STARTING
FAN
4
HI
ML
MH
LO
C
R
DATA
NEUTRAL
L1
Y W R
9
PRESSURE
INDUCER
SWITCH
CAP
NEUTRAL
HOT
SV9501;
SV9520
C1
C3
C2
2
LIMIT
ROLLOUT
SWITCH
SWITCH
FLAME ROD
HOT
SURFACE
IGNITER
M16880
69-2252EF—07
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