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Standard Wiring Layout
Below wiring diagrams represent two common ways to wire a Switching Relay.
1 AMP FUSE
ALL TRANSFORMER
CONNECTIONS ARE
FACTORY WIRED
24VAC,
15VA
POWER
T-STAT CALL
LINE VOLT
STATUS
COM
NO
POWER TO
TRANSFORMER
N
H
120VAC
JUMPER
N
H
Fig. 5. Standard wiring layout.
ALL TRANSFORMER
CONNECTIONS ARE
FACTORY WIRED
24VAC,
15VA
LINE VOLT
STATUS
COM
POWER TO
TRANSFORMER
N
H
120VAC
TO ZC
TO ZR
N
H
Fig. 6. Alternate wiring layout.
3
THERMOSTAT WIRING
NON-CONNECTED OR
POWER STEALING
R W C
POWER IN
24 VAC
6 AMP FUSES
NC
COM
NO
NC
TO BOILER
RELAY
CIRCULATOR
M37270
THERMOSTAT
WIRING
CONNECTED
1 AMP FUSE
R W C
POWER IN
24 VAC
POWER
T-STAT CALL
6 AMP FUSES
NO
NC
COM
NO
NC
CIRCULATOR
M37271
HPSR101
33-00349EF—01
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