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This kit is primarily verified for the ML6984 and ML7984 series non-spring return actuators
and Ducane residential condenser units
Smith gas valve ecosystem
Complete Component Kit: Includes diaphragm
Note that this specific model (0158774) is intended for non-potable water applications and features tamper-resistant bonnet screws to maintain factory calibration in the field
Copeland 971-0554-28 Protector Kit 321894-709 This kit is primarily verifiedThe Copeland 971 0554 28 Protector Kit is a field critical compressor overload protector designed for external mounting on high performance HVAC and refrigeration units. Built to withstand demanding industrial and commercial environments, this external motor protector serves as a final line of defense against electrical overcurrent and thermal overload conditions. By constantly monitoring current draw and winding temperature, the Copeland 971 0554 28