This OEM replacement part is a direct

housed in a NEMA 1 enclosure

Is this pump kit compatible with all York chiller models

If touched

The York S1-55000-328 is a high-sensitivity photoelectric duct detector head engineered for rapid smoke detection within environmental air ducts

Aprilaire 50 Relay 321894-706 This OEM replacement part isOptimize your home climate control system with the Aprilaire 50 Relay, a high performance current sensing relay designed specifically for 24V HVAC applications. This essential component ensures your whole house humidifier operates only when the furnace blower is active, preventing wasted water and protecting sensitive electronics from electrical feedback. By detecting the furnace blower motor current, the Aprilaire 50 automates the humidification