York S1-THPU433-S Thermostat Els PW 17895 The automatic ball checks are

The automatic ball checks are safety features designed to seat against the orifice if the glass breaks

This TS11J-3211-1-0 replacement is built for high-ambient environments

and 208-277V coil inputs

Universal Compatibility: Serves as a versatile 720 series gas valve suitable for natural

While designed for York units

York S1-THPU433-S Thermostat Els PW 17895 The automatic ball checks areThe York S1 THPU433 S is a high resolution, 7 day programmable thermostat engineered for precise climate control in advanced 24V residential and commercial HVAC applications. Supporting 3 stages of heating and 2 stages of cooling (3H 2C), this unit provides the multi stage logic required for heat pumps and multi speed systems. It serves as the direct OEM replacement for the S1 TRPU32P7HW S and is backward compatible with several legacy York