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Fail-Safe Design: Integrated spring return mechanism ensures the valve returns to its original position during power loss
When servicing or replacing the unit
it delivers stable operation with CCW lead end rotation
when installed in a compatible VP525C body
Siemens Building Technology QAC3171 Sensor R-410A Fail-Safe Design: Integrated spring returnThe Siemens QAC3171 is a professional grade active outdoor temperature sensor designed for high performance environmental monitoring in commercial HVAC and building automation systems. Engineered with a Pt1000 sensing element, this unit provides high measurement stability and linear signal transmission. It features a versatile 4 20mA output signal, making it compatible with a wide range of controllers for applications like outdoor air reset, chiller
