Description
The Johnson Controls P72AB-1 is a pressure control switch designed for accurate control of low pressure HVAC systems. Our pressure-sensing bellows connects to the system by a 36” capillary tube to allow for remote positioning. When pressure increases and exceeds the user set pressure in the range 20 to 100 PSI, the P72AB-1 gives the conditions to the “Open-Low” switch action. It also provides dual control that was suitable for pressure-based pump operation, concomitant alarm and equipment stoppage during low pressure, airflow or safety shut-off in delicate HVAC systems, among others.
