Xylem McDonnell & Miller 150S Series - Switch Operation; Switch Operation Details by Model

8
Switch Operation
For all Models except 158S and 159S
For Model 158S
Boiler feed pump off,
burner on, alarm off.
Boiler feed pump on,
burner on, alarm off.
Boiler feed pump on,
burner off, alarm on.
1 2 4 5 6 1 2 4 5 6
1 2 4 5 6
Motorized valve closed,
burner on, alarm off.
Motorized valve open,
burner on, alarm off.
Motorized valve open,
burner off, alarm on.
4 5 6
1 2
3
4 5
1 2
3
4 5
1 2
3
6 6
For Model 159S
Pump #1 off,
pump #2 off.
Pump #1 on,
pump #2 off.
Pump #1 on,
pump #2 on.
1 2 5 6 1 2 5 6
1 2 5 6