}
}
To TT on boiler
To
circulator
Input
Power
120/1/60
Factory
Installed
Jumper
6
NO
5
6
NC
4
NC
4
NO
3 H N G
}
}
To
thermostat
T/W T/R
C
To ZC
To
circulator
}
}
Input
Power
120/1/60
Remove
Factory
Installed
Jumper
6
NO
6
NC
4
NC
4
NO
3 H N G
5
TYPICAL WIRING SCHEMATICS
Thermostat Wiring
Figure 1: Cold Start Boiler
When a thermostat calls for heat, the corresponding
circulator will start and the 5-6 NO end switch will
close to enable the boiler.
Figure 2: Tankless Coil (Remove Jumper)
When a thermostat calls for heat, the corresponding
circulator will start when the boiler temperature
reaches the low limit setting
Xylem Inc.
8200 N. Austin Avenue
Morton Grove, Illinois 60053
Phone: (847) 966-3700
Fax: (847) 965-8379
www.xylem.com/bellgossett
Bell & Gossett is a trademark of Xylem Inc. or one of its subsidiaries.
© 201
9
Xylem Inc. 210711
D
June 2019
