or a relay that "chatters" or stays "stuck closed

allowing for multi-positional indoor installation without the need for traditional vent piping to the outdoors

this component provides the isolation and thermal stability necessary for long-term operational readiness

F) specified by the manufacturer

and MP8000 series valve actuators

Cleveland Controls AFS-398 Air Switch Els PW 17895 or a relay that "chatters"The Cleveland Controls AFS 398 is a professional grade air pressure sensing switch engineered for precision proving in HVAC and energy management systems. This differential air pressure switch features a versatile adjustable set point range from 0. 03" to 2. 0" w. c., allowing for exact field calibration using the integrated adjustment screw. This SPDT air switch is housed in a rugged plated enclosure with a high quality silicone diaphragm, making it