Description
The Lochinvar & A.O. Smith 100278107 Pressure Switch observes air pressure differentials across heat exchangers or combustion blowers, verifying adequate airflow before permitting ignition sequences. This pressure sensing unit closes electrical contacts when pressure reaches preset activation points, signaling control boards that safe operating conditions exist for burner activation. It mounts on vent systems where tubing connections sense pressure changes during startup cycles. Adjustable setpoints accommodate various configurations and venting requirements in HVAC systems. This switch delivers essential safety performance when furnace or boiler operation depends on proven draft establishment that prevents combustion gas spillage and ensures complete exhaust evacuation.
