The McDonnell & Miller Series 150E provides continuous protection against a low water condition and satisfies pump control needs for commercial and industrial steam boilers.

The 150E compensates for rapidly changing boiler water levels.  It has adjustable burner and pump settings and powerful 1 HP relays. 

Typical Applications of the McDonnell Miller 150E and 157E:
 - Primary and secondary low water fuel cut-off protection and pump control for commercial and industrial steam boilers

 - Motorized valve controller, low water cut-off, high water cut-off, and alarm actuator for boilers, vessels and tanks.
 

Benefits of the McDonnell & Miller Series 150E:
- Prevents rapid burner and pump cycling
- Constant operation throughout pressure range
- Electrical starters not required for motors up to 1 HP
- Easy monitoring of operation
- Easy troubleshooting

Specifications:
- NEMA 1 enclosure
- Max. operating pressure 150 PSI
- Max. ambient temperature 135°F
- Max. operating temperature 366°F (at probes)
 

Features:
- Set points and differentials remain constant throughout pressure range
- Auto or manual reset
- Probe operation diagnostics
  - Sensitivity monitor
  - Sequence monitor
  - Wetted probe monitor
- Adjustable 60-second burner-off time delays
- Adjustable 3/4" or 1-3/16" pump differentials
- 1 HP burner and pump relays
- Control can be remote mounted