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the Watts 474A ensures rapid discharge when pressure thresholds are exceeded
Reliable Motor: Uses a synchronous hysteresis motor designed for high-cycle applications without overheating
This motor utilizes a 3 MFD / 370V run capacitor
Adjustments are made via the internal range and differential screws
ensuring stable combustion and reliable ignition in residential and commercial boilers
Functional Devices RIBMNLB-4 Board 322838-754 the Watts 474A ensures rapidThe 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,
