McDonnell Miller Series 150E & 157E

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


McDonnell & Miller 150E	McDonnell & Miller 157E


McDonnell & Miller 150E-HD	McDonnell & Miller 157E

Ordering Information
Model Number	Part Number	Description	Weight lbs.	Price
150E 150E-M 157E 157E-M	171600 171610 171620 171630	Combination low water cut off/pump controller 150E w/ manual reset 150E w/ water column 157E w/ manual reset	22.9 22.9 36.9 36.9	$Call $Call $Call $Call
Replacement Parts (View parts cut sheet)
Model Number	Part Number	Description	Weight lbs.	Price
150E-HD 150E-M-HD 150E-CU 150E-M-CU 150E-PF	171640 171650 310490 310491 310492	Head Mechanism for 150E or 157E Head Mechanism for 150E-M or 157E-M Control Unit for 150E or 157E Control Unit for 150E-M or 157E-M Probe and flange assembly for all 150E's & 157E's	8.7 8.7 2.7 2.7 6.0	$Call $Call $290.00 $Call $Call

Electrical Ratings

Supply
Voltage

Probe
Voltage

Full Load (Amps)
NO (NC), (Vac)

Locked Rotor (Amps)
NO (NC), (Vac)

Pilot Duty (VA)
NO (NC), (Vac)

Motor (HP)
NO (NC), (Vac)

120 Vac
50/60Hz

5 Vac
Maximum

16 (5.8), 120

96 (34.8), 120

470 (290), 120

1 (1/4), 120

8 (2.9), 240

48 (17.4), 240

470 (290), 240

1 (1/4), 240

Model 150E Dimensions, in. (mm)

6-11/16 (170)

11-5/16 (287)

6 (152)

14-3/16 (360)

3-5/16 (84)

J NPT

10-7/8 (276)

4-1/8 (105)

3-7/16 (87)

1 (25)

Model 157E Dimensions, in. (mm)

A NPT

B NPT

1 (25)

1/2 (13)

14-5/16 (364)

2-5/16 (59)

4-15/16 (125)

F	G	H	J	K NPT	L
12-5/8 (321)	16 (406)	11-1/2 (292)	3-1/2 (89)	3/4 (19)	5-7/8 (149)

McDonnell Miller 150E Dimensions

McDonnell Miller 157E Dimensions