System Protection: Critical safety interlock that prevents the burner from firing under unsafe venting conditions

This component is frequently used in Reznor models UA

this is a 24VDC relay

Installation requires a calibrated manometer to verify manifold gas pressure settings

Designed for continuous air-over (CAO) duty

ASCO 8320G172 Valve 319848-301 System Protection: Critical safety interlockThe ASCO 8320G172 Valve is a high performance 3 way universal solenoid valve designed for precision flow control in demanding HVACR and industrial environments. This direct acting solenoid valve features a robust brass body and NBR seals, making it ideal for managing air, inert gas, water, and light oil. With a 1 4 inch NPT connection and a 120Vac coil, it delivers reliable operation across a broad pressure range, supporting up to 125 PSI for air and