Trane SWT3221 SPST Pressure Switch Open-1.36" Close-1.55"

The Trane SWT3221 is a SPST pressure switch for use in many HVAC systems. Sensing pressure changes of the system and activating or deactivating electrical circuits, it works. Normally used to control fans, compressors, or other pressure controlled components, the switch is always actuated to operate these components based upon pressure. The opening set point is 1.36" water column and the closing set point is 1.55" water column for a precise control of system pressure. Used in air handling units, chillers and other HVAC system equipment to control airflow, maintain system operation and improve energy efficiency, it is often used in common areas such as campus buildings as well.