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Inline duct booster air pressure switch , adj set point
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 -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: psi (0.03 bar)
Operating Temperature Range: 40 to 180F( 40.0 to 82.2C)
Life: 100,000 cycles minimum at 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, ", 90 quick-connect terminals
Sample Line Connectors: Two barbed " slip-on connectors, suitable for flexible tubing
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