Siemens Building Technology QAA2212.FWNN Sensor 318973-401 With a wide setpoint range

With a wide setpoint range of 100 to 240 degrees F and a 10 degree F fixed differential

Reliable Construction: Built to withstand the environmental stressors of rooftop and outdoor mechanical rooms

The igniter operates on a 120 VAC

External equalization is necessary for 8-ton systems to compensate for the significant pressure drop through large evaporator coils

Included Components: Comprises the pilot burner

Siemens Building Technology QAA2212.FWNN Sensor 318973-401 With a wide setpoint rangeThe 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