Functional Devices RIBMNLB-4 Board 322838-753 Color-Coded Ports: Clear identification of

Color-Coded Ports: Clear identification of P1 (high) and P2 (low) inlets reduces error during sample line connection

Negative Pressure Compatibility: Specifically ported for use with negative pressure burner systems requiring 1/2 PSI max inlet

the mechanical spring return ensures the application reaches its safety position immediately

Utilizing genuine Lennox HVAC parts ensures that the system operates within original manufacturer specifications

Functional Devices RIBMNLB-4 Board 322838-753 Color-Coded Ports: Clear identification 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,