Description
The Weil McLain 511-624-304 Pressure Switch 0.80″ WC senses air pressure inside the boiler’s combustion and venting pathways and activates electrical switching when pressure reaches the calibrated water column level. It ensures the proper draft and airflow conditions by signaling the control system when pressure rises above or falls below safe operating limits. It supportinf maintain correct burner operation and system protection. The switch uses a diaphragm-based sensing mechanism with SPST contact action for reliable circuit control. Through HVAC systems, it exhibits in gas-fired boilers to verify combustion airflow that supports safe ignition sequencing.
