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

Key Benefits for Contractors: OEM Compatibility: Specifically designed for PL and TL model compressors for drop-in reliability

Secondary Access: Features an integrated access port with a tethered cap for simplified diagnostic checks and refrigerant recovery

Can I use an adjustable pressure switch instead of the 42-101443-89

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