Functional Devices RIBMNLB-4 Board 322838-754 meeting the rigorous standards of

meeting the rigorous standards of professional contractors requiring UL Listed and PLENUM rated hardware for dry contact switching

ensuring stable combustion and reliable ignition in residential and commercial boilers

while the integrated check valve makes it fully compatible with heat pump systems

The counter-clockwise rotation (CCW) as viewed from the lead end is standard for many furnace and ventilation drive systems

Functional Devices RIBMNLB-4 Board 322838-754 meeting the rigorous standards ofThe 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,