This precise HVAC frequency control is critical for maintaining high part-load efficiency and protecting the compressor motor from thermal stress

The setpoint is easily adjusted via the screw located at the top of the spring housing using a standard service wrench or screwdriver

5" ceramic base matches industry-standard brackets for fast field installation

offering reliable continuous duty in commercial hydronic heating

Electric direct-acting solenoid provides immediate response for critical gas-train sequences

Lochinvar & A.O. Smith 100166434 Pump 320788-703 This precise HVAC frequency controlThe Lochinvar & A. O. Smith 100166434 Circulator Pump is a heavy duty, 3 speed hydronic component engineered specifically for high efficiency heating systems, including the Lochinvar Knight KBN080 through KBN210 series. Built with a rugged cast iron housing and a 1 6 HP motor, this 115V 60Hz assembly is a direct replacement for the obsolete PUM3020. Operating as a wet rotor, water lubricated unit, it eliminates the need for manual oiling while