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NEW AIR PRESSURE SENSING SWITCH The Model AFS-298 is a general purpose proving switch designed for HVAC and Energy Management applications. It may be used to sense positive, negative, or differential air pressure. General Description & Operation The plated housing contains a diaphragm, a calibration spring, and a snap-acting SPDT switch. The barbed sample line connections located on each side of the diaphragm accept flexible tubing. The electrical connection consists of male ¼-inch quick connect terminals. Mounting Position:Mount with the diaphragm in any vertical plane. Set Point Range: 0.05 ±0.02"w.c. to 12.0" w.c. Field Adjustable "Operate Range": 0.07"w.c. to 12.0"w.c Field Adjustable "Release Range":0.04"w.c. to 11.2"w.c. Approximate Switch Differential: Progressive, increasing 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 byproducts that will not degrade silicone. Maximum Pressure: ½ psi (0.03 bar) Operating Temperature Range: –40 to 180F(–40.0 to 82.2C) 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 amp noninductive to277 VAC, 60 Hz. Electrical Connections: Male, ¼", 90° quick-connect terminals Sample Line Connectors: Two barbed ¼" slip-on connectors, suitable for flexible tubing (Cleveland afs-298 pressure sensing switch adj set point is the responsibility of Fran Hayes) |
Fran_hayes@cedar--rapids.com (Fran Hayes) for more information.
