providing the necessary hardware to restore proper combustion air flow and venting performance

verify your controller compatibility if attempting to modulate speed via external devices

Can this relay be used on other brands besides Carrier

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

allowing occupants to fine-tune comfort without complex programming

Siemens Combustion QRA2(1) UV Detector Freon providing the necessary hardware toThe 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