Siemens Building Technology QAA2235.EWSN Sensor mario the 90-247 is designed for

Description

the 90-247 is designed for 50/60 Hz frequency ratings

whereas the older version was strictly for R22 using mineral oil

Built with a rugged carbon steel housing

Running a system without a functional 200F auto limit switch creates a significant safety hazard

Where should the 30-inch capillary sensing bulb be mounted

Siemens Building Technology QAA2235.EWSN Sensor mario the 90-247 is designed forThe Siemens QAA2235. EWSN is a precision room temperature sensor engineered for seamless integration into commercial Building Automation Systems (BAS). Utilizing a 100k Ohm thermistor active output, this unit provides highly stable and linear temperature feedback to HVAC controllers, ensuring tight deadband management and optimized energy efficiency. Designed specifically for indoor comfort monitoring, it operates across a standard range of 32F to

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