Bell & Gossett 211013D PSE 800 M Low Water Cut-off - Manual (Page 13)

_____ Solid lines indicate new wires.
Option C wiring
Wiring a new manual reset LWCO to a boiler with a Model 67 LWCO. Voltage of the new
manual reset LWCO must be the same voltage as the burner circuit.
1. Remove existing wire from terminal 1 of the Model 67 LWCO and connect it to
Terminal B of the new manual reset LWCO.
2. Connect a new wire from terminal 1 of Model 67 LWCO to terminal H of the new
manual reset LWCO.
3. Connect a new wire to terminal N of new manual reset LWCO and splice it to the
existing neutral wire.
Existing wiring to boiler New wiring to boiler
1 2
3 4
TOP
2
3
4
N H C W B
1
1 2
3 4
TOP
2
3
4
1. Factory jumper bar
2. To burner
3. Neutral
4. Hot
_ _ _ _ Dashed lines indicate existing wires.
_____ Solid lines indicate new wires.
Installation
PSE-800-M Low Water Cut-off Installation, Operation, and Maintenance Manual 11