Supco® Universal Style Air Pressure Switch Kit

Supco® Universal Style Air Pressure Switch is a low cost, high accuracy and reliable universal air pressure switch that replaces many small footprint type switches. The kit includes springs and orifice restrictors and hardware.

Features

• Senses positive, negative or differential air pressure
• Set Point Range: 0.10" to 10" w.c.
• Electrical Ratings: 1/10 hp @ 120 to 277 VAC. 28 VA pilot duty @ 24 VAC,125 VA pilot duty @ 120 VAC
• Contact Arrangement: SPDT Operating Temperature Range: 40°F (4.4°C) to 190°F (87.8°C).
• UL & CSA approved
• 2 year warranty

Common HVAC&R Applications

• Gas fired warm air furnaces - improve fan flow by sensing draft down from blower; switch actuation allows ignition start up or shuts system down upon insufficient draft
• Electronic air cleaners and humidifiers can employ sensing switches to prove airflow; switch actuation starts unit with sufficient airflow or draft
• Strip heaters employ airflow sensing switches to prove positive pressure/airflow in duct and air movement across heat source; shuts off heat source with insufficient airflow
• Exhaust fans and draft hoods employ sensing switches to sense draft down from exhaust fan; switch actuation signals condition upon fan failure or insufficient draft
• Refrigeration and cooling coils are maintained by sensing differential pressure/airflow drop across coils; switch actuation signals condition when they ice, or actuates the defrost cycle