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and small air handlers that operate on 277V power
meeting the rigorous standards of professional contractors requiring UL Listed and PLENUM rated hardware for dry contact switching
188" inner diameter (ID) ensures a secure fit on standard 1-3/16" shafts
The counter-clockwise rotation (CCW) as viewed from the lead end is standard for many furnace and ventilation drive systems
while the integrated check valve makes it fully compatible with heat pump systems
Functional Devices RIBMNLB-4 Board 322838-754 and small air handlers thatThe Functional Devices RIBMNLB 4 logic board is a field proven AHU fan safety alarm circuit designed to aggregate multiple shutdown signals into a single supervisory point. This 4 input logic module eliminates the need for complex, hand wired relay interlocking by using high density 2. 75 inch track mount housing. Optimized for 24Vac dc power input, the board accepts up to four normally closed (N C) inputstypically from smoke detectors, freeze stats,
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