The PENN Family of Pressure and Temperature Controls. Johnson Controls Virtual Branch. Refer to the product label inside the control cover for model number and switch action. Refer to Table for switch action, low event, and high event for the various control models.
High pressure cutout controls with automatic reset have a scaleplate that displays the CUT IN and CUT OUT setpoints.
Differential Pressure Switch. It operates an SPDT switch at the differential pressure set point. With these differential pressure switches , the set point may be adjusted without. This switch senses a change in the (differential) pressure as the airflow changes.
The (differential) pressure is applied to the two sides of a diaphragm in the control. The spring-loaded diaphragm moves and actuates the switch. For the latest product updates, visit us online at johnsoncontrols.
The Pdifferential pressure switch is used to sense flow of air in ducts. When used with electric strip heaters, the switch can be wired to open the circuit and de- energize the heaters when air flow stops.