Siemens Building Technology 540-680CA Sensor R-407A this 20-ton capacity TXV ensures

this 20-ton capacity TXV ensures precise refrigerant metering across varying load conditions

Engineered as a robust furnace gas control

While the opening time is fixed for fast action

Designed specifically for Burnham and New Yorker boilers

As the direct replacement for RSS-495-112

Siemens Building Technology 540-680CA Sensor R-407A this 20-ton capacity TXV ensuresThe Siemens 540 680CA Sensor is a precision 10k Ohm NTC thermistor designed for seamless integration with Siemens Apogee systems and Terminal Equipment Controllers (TEC). This Series 1000 room unit features a flush mounted occupancy override button and a high accuracy setpoint adjustment slide, allowing for localized control without compromising system level oversight. The Celsius temperature display provides real time feedback for occupants, while