the unit closes its valves to shut off main air and prevent branch line bleed

Dual-Frequency Compatibility: Engineered to perform efficiently on both 50Hz and 60Hz power supplies

The unit includes an integral stainless steel strainer to protect internal components from sediment and debris

Engineered as a direct fit for Goodman and Amana GUN-B and GUS series furnaces

making it suitable for high-draw fan motors and compressor contactor circuits

Siemens Building Technology QAC22 Sensor 340793-762 the unit closes its valvesThe Siemens Building Technology QAC22 Sensor is a precision passive outdoor temperature sensor engineered for weather compensated control in high performance HVACR systems. Utilizing an LG Ni 1000 ohm sensing element (Ni RTD, 1k Ohm @ 32F), this unit provides a highly stable output signal across a wide operating range of 58 F to 158 F ( 50 C to 70 C). Designed for standard building automation systems, it accurately monitors outdoor air temperature