The 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

Designed for OEM fit

This high-efficiency ventor motor operates at 115/120V with a counter-clockwise (CCW) rotation

Enclosed Housing: Protects the internal switching mechanism from job-site contaminants

Technicians should verify the hub position—typically set at 2 and 1/8 inches from the motor face—to ensure the blades are properly centered within the orifice for maximum static pressure

Hartland Controls CON-3/24/75 Contactor THPU32HP7Y The McDonnell & Miller 157S-AThe Hartland Controls CON 3 24 75 is a heavy duty 3 pole definite purpose contactor engineered for high demand commercial HVACR and industrial applications. Built to handle a 75 amp inductive load and up to 90 amps resistive, this component is frequently used for controlling large compressors, condenser fans, and resistive heating elements in rooftop units and chillers. Operating with a 24Vac 50 60Hz coil voltage, it features silver cadmium oxide