this specific cover is designated for the FS4-3 and AF air flow series only

Contractor Grade: Standard 1/8" NPT air connections and top mounting holes ensure seamless integration into existing Schneider Electric or legacy Barber Colman footprints

Can this relay be used on other brands besides Carrier

allowing occupants to fine-tune comfort without complex programming

Can I use this valve on a smaller 1/2-inch residential furnace

Siemens Combustion QRA2(1) UV Detector Freon this specific cover is designatedThe Siemens Combustion QRA2(1) UV Detector is a high performance ultraviolet flame sensor designed specifically for the supervision of gas and oil flames in industrial and commercial burner systems. Engineered for intermittent operation, this normal sensitivity detector utilizes a side viewing photodiode to monitor UV radiation in the 190 to 270 nm spectral range. The QRA2(1) features a specialized metallized plastic housing that effectively prevents