McDonnell & Miller 157S-R Controller Els PW 17895 it provides a stable flame

it provides a stable flame for consistent main burner ignition

which prevent winding failure under high ambient loads

minimizing mechanical wear and ensuring quiet operation during peak demand periods

Streamlined Installation: Features a hinged captive cover for easy access to internal circuitry and dual sensors that prevent internal leaks compared to traditional manifold setups

The unit is housed in a rugged zinc-plated steel enclosure that protects the SPDT contact arrangement and silicone diaphragm from the mechanical stresses of a mechanical room environment

McDonnell & Miller 157S-R Controller Els PW 17895 it provides a stable flameThe McDonnell & Miller 157S R (Part Number 176220) is a heavy duty, float operated combination low water cut off and pump controller designed specifically for steam boilers with an integral water column. This model serves as the upgraded direct replacement for the McDonnell & Miller 157 R, transitioning from older mercury switch technology to reliable, bimetal snap acting switches for enhanced safety and modern compliance. Built with a corrosion