Cleveland Controls Model AFS-A-173 Pressure Proving Switch
Description: Model AFS-A-173 is a general-purpose airflow proving switch typically applied to package burners, furnaces, and fuel-burning equipment. It accurately senses positive, negative, or differential air pressure. Features: Mounting Position: Mount with the diaphragm in any vertical plane. Set Point Range: 0.05 ± 0.02" w.c. to 12.0"w.c. (1.27 ± 0.508mm w.c. to 304.8 mm w.c.) (0 to 0.43 psi). Approximate Switching Differential: Progressive; increases from 0.02± 0.01"w.c.at minimum set point to approximately 0.8 " w.c. at maximum set point Measured Media: Air, or combustion by-products that will not degrade silicone. Maximum Pressure: ½ PSI (0.03 bar). Operating Temperature Range: -40F to 180F (-40 to 82C). Life: 100,000 cycles minimum at ½ psi maximum pressure each cycle and at maximum rated electrical load. Electrical Rating: 300 VA pilot duty at 115 to 277 VAC,15 amps noninductive to 277 VAC, 60 Hz. Contact Arrangement: SPDT. Electrical Connections: Screw-type terminals with cup washers. Conduit Opening: ⅞" diameter opening accepts ½" conduit. Sample Line Connections: Connectors will accept ¼" OD rigid or semi-rigid tubing. Approvals: UL, FM, CSA. Resources: Technical Literature for the AFS-A-173 Air Proving Switch Technical Bulletin for the AFS Series Field Calibration Air Switch Glossary Here.