this unit optimizes refrigerant flow in both heating and cooling cycles without the need for external check valves

or the control board flashing a code indicating the pressure switch did not close

the 4PST configuration is frequently used by technicians to switch all three legs of a 3-phase motor

Precision Thermal Response: High-sensitivity NTC thermistor technology provides rapid feedback for tighter temperature regulation and improved modulation

effectively prohibiting pressure mixing between separate control loops

Resideo VCZBB3600 Valve 318423-701 this unit optimizes refrigerant flowThe Resideo VCZBB3600 is a high performance 1 2" NPT two way cartridge cage valve engineered for precision control in hydronic systems. Featuring a 1. 3 Cv flow coefficient and a modified equal percentage flow characteristic, this valve ensures stable temperature regulation for both chilled and hot water applications. Built with a rugged bronze body and a stainless steel stem, it is designed to withstand demanding environments, including systems