This microprocessor-based module features a 15-second ignition trial and a 30-second pre-purge cycle to ensure safe gas pressure stabilization before electrode discharge

and Reliance gas-fired units

Pressure switches are safety-rated for specific blower and venting configurations

This kit is specifically designed for Weil McLain Ultra Model 310 gas boilers

York S1-025-51449-000 TXV Valve 320819-301 This microprocessor-based module features aThe York S1 025 51449 000 is an OEM thermostatic expansion valve (TXV) and distributor assembly engineered for precise refrigerant metering in specialized HVAC systems. Featuring a unique 12 tube distributor configuration and a #6 orifice size, this component is critical for maintaining optimal superheat levels across the evaporator coil. By accurately balancing bulb pressure and evaporator pressure, the valve prevents liquid floodback to the