The Daikin-McQuay 066540601 is a high-precision low temp limit switch engineered specifically for HVAC freeze protection in commercial air handling systems

featuring a robust internal design that resists compressed air contaminants and prevents clogging in high-flow filter housings

Self-Restoring Design: The thermal switch resets automatically after reaching its 225 degrees F threshold

Whether you are addressing a failed high-static application or performing a proactive system overhaul

and UDAP-400 units

Utica-Dunkirk 550002576 Filter 323055-751 The Daikin-McQuay 066540601 is aThe Utica Dunkirk 550002576 Filter is a professional grade 3 8" ODF Bi Flow Liquid Filter specifically engineered for heat pump applications. As an OEM replacement component, this bi directional liquid line filter drier features internal check valves that manage refrigerant flow in both heating and cooling modes, eliminating the need for external check valve piping. The solid core desiccanttypically a blend of molecular sieve and activated aluminais