Supco NS2000031 Universal Air Pressure Switch and similar items

Supco NS2000031 Universal Air Pressure Switch Low cost, high accuracy and reliable universal air pressure switch that replaces many small foot print type switches. Features / Benefits Senses positive, negative or differential air pressure. Set Point Range: 0.01" 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: 40F (4.4C) to 190F (87.8C). UL CSA Approved. 2-year warranty Common HVAC R Applications On gas fired warm air furnaces, prove 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. http://www.unicontrolinc.com/CC%20PDFs/LITNS2-11.pdf Powered by Turbo Lister The free listing tool. List your items fast and easy and manage your active items.