York 028-12224-000 O-Ring 322838-754 a microprocessor-based Hot Surface Ignition

a microprocessor-based Hot Surface Ignition (HSI) control module designed for high-efficiency gas-fired appliances

the two-way configuration supports proportional control to ensure precise temperature regulation and system efficiency

Enhanced Efficiency: Enables proper economizer mode operation

It serves as a head pressure control valve that limits liquid flow from the condenser while diverting hot gas to the receiver to maintain a minimum operating pressure of 295 PSI during low ambient conditions

Swapping with a different RPM rating will change the amperage draw and airflow

York 028-12224-000 O-Ring 322838-754 a microprocessor-based Hot Surface IgnitionThe York 028 12224 000 O Ring is a critical sealing component engineered for high pressure HVACR applications, specifically within York chiller systems and industrial mechanical assemblies. Featuring a 6. 484 inch Inside Diameter (ID) and a 0. 139 inch thickness, this OEM York replacement part (also identified as S1 028 12224 000) is designed to fit precisely into machined grooves to prevent fluid and gas migration. Constructed from high performance