The York S1-025-30801-000 Flame Sensor is a critical safety component designed for precise flame rectification in residential and commercial gas furnaces

typically integrated within the ESBE VTC511 series

which protects the secondary circuit from overloads and short circuits without the need for traditional fusing

the switch is open

The "U" suffix typically denotes "Universal" or retail packaging

Schneider Electric (Erie) VM2221 Valve Body Els PW 17895 The York S1-025-30801-000 Flame SensorWhen you're outfitting a hydronic system that demands precision, the Schneider Electric (Erie) VM2221 Valve Body is a standard for professional reliability. This 1 2 inch 2 way NPT zone valve is engineered for modulating service in hot and chilled water applications, featuring a 1. 0 Cv rating that ensures stable flow control. Built with a rugged 300 psig rated forged brass body, it utilizes the Erie PopTop mounting system, allowing for one handed