The York S1-025-35381-000 Limit Switch is a critical HVAC safety control designed to monitor internal plenum temperatures and protect the heat exchanger from thermal stress

Can this be used in 60Hz regions

such as HC5B or HC8B

though it is recommended to verify if additional rebuild kits are needed for a full valve overhaul

Robertshaw 700-522 Gas Valve Els PW 29614 The York S1-025-35381-000 Limit SwitchThe Robertshaw 700 522 is a professional grade 1 inch NPT gas valve designed for high capacity applications, delivering up to 720,000 BTU. This millivolt diaphragm gas valve is a versatile solution for contractors servicing a variety of commercial and residential systems, including large furnaces, boilers, and swimming pool heaters. Engineered for a 3. 5" WC natural gas set point, this unit is also field convertible for LP applications using the