Optimized Sequencing: Precise timing intervals for inducer pre-purge and blower delay-off cycles

and verify if the board initiates a defrost cycle when shorting the "test" pins

Extended Reach: The 30" capillary tube offers flexibility for bulb placement on larger suction lines

it features a 1-inch NPT male connection and integrates seamlessly into systems with pipe diameters ranging from 1 to 6 inches

Resideo NK300S-100 Valve R-407A Optimized Sequencing: Precise timing intervalsThe Resideo NK300S 100 Valve is a professional grade boiler feed combination valve designed for rapid system commissioning and robust backflow protection in closed loop hydronic heating systems. This high capacity 16 GPM unit integrates a testable double check backflow preventer, an adjustable pressure reducing valve, and dual shut off ball valves into a single brass housing. Built for high demand residential and light commercial applications, the