McDonnell & Miller 157S-A Controller Els PW 17895 the capscrews should be tightened

the capscrews should be tightened to approximately 300 inch-pounds

simplifying wiring in plenum-rated spaces

Field Versatility: Direct compatibility with rigid or flexible round ductwork via crimped (male) and uncrimped (female) ends

and ventilation circuits

McDonnell & Miller 157S-A Controller Els PW 17895 the capscrews should be tightenedThe McDonnell & Miller 157S A (Part Number 173702) is a heavy duty combination low water cut off and pump controller designed specifically for commercial and industrial steam boiler applications. Featuring a snap acting SPDT switch, this unit ensures precise control over water levels and reliable burner cutout during low water conditions. The 157S A model includes alternate tappings, providing versatile installation options for equalizing pipes and