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This SPST (Single Pole Single Throw) control is factory-calibrated to open the electrical circuit at 400 degrees Fahrenheit and features an automatic reset that closes once the temperature drops to 360 degrees Fahrenheit
this assembly maintains consistent cfm performance to ensure proper combustion airflow and prevent pressure switch trip errors
essential for smoke or freeze-stat safety sequences
It helps regulate the electrical characteristics of the drive circuit
Siemens Building Technology QAA2212.FWNN Sensor 318973-401 This SPST (Single Pole SingleThe Siemens Building Technology QAA2212. FWNN is a professional grade room temperature sensor designed for high precision building automation. Built with a 1k Ohm Platinum RTD (385 Alpha) sensing element, this unit delivers exceptional accuracy of + 0. 54F at 32F, ensuring stable environmental control in commercial offices, classrooms, and industrial facilities. This model features a full LCD display for real time monitoring and an integrated setpoint