McDonnell & Miller 157S-R Controller 30067439-890 Optimized VX100 Charge: Specifically tuned

Optimized VX100 Charge: Specifically tuned for R-407C and R-22 systems to prevent hunting at high-load conditions

maintaining stable condensing temperatures even under varying heat loads

The 5-foot capillary tube and remote sensing bulb provide the reach necessary for proper placement on suction headers

making it a reliable choice for main burner and pilot load applications

Does this assembly include the high-limit thermal switch

McDonnell & Miller 157S-R Controller 30067439-890 Optimized VX100 Charge: Specifically tunedThe 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