The Johnson Controls P70AB-2 is a single-pole, single-throw (SPST) low pressure control engineered for reliable pressure-sensing and switching in commercial and industrial HVAC and refrigeration systems. With a Close High/Open Low switching action, this control energizes the circuit as pressure rises and de-energizes as it falls, making it ideal for low-side pressure management and compressor protection applications.
Operating Specifications
- Switching Action: Close High, Open Low (SPST)
- Pressure Range: 20″ WC to 100 PSI
- Differential Range: 6 PSI to 50 PSI (adjustable)
- Maximum Overpressure Rating: 325 PSIG
Connection & Sensing
- Capillary Length: 36 inches
- Pressure Connector: 1/4″ Flare Nut
- Adjustment Type: Cutout Knob
Key Features
- SPST single-pole switching for straightforward circuit control
- Wide pressure sensing range from 20″ WC to 100 PSI suits diverse low-pressure applications
- Broad 6–50 PSI adjustable differential range allows precise system tuning
- 36″ capillary with 1/4″ flare nut connector for easy field installation and flexible routing
- Cutout knob adjustment enables simple, tool-free setpoint calibration
- Robust 325 PSIG maximum overpressure rating protects the control from pressure spikes
- Designed for use with refrigeration and HVAC systems requiring dependable low-side pressure control
Applications
- Commercial refrigeration low-side pressure control
- HVAC compressor protection and cycling
- Industrial process pressure switching
- Low-pressure safety cutout applications
The P70AB-2 is built to Johnson Controls’ exacting standards, delivering consistent performance and long service life in demanding environments. Its field-adjustable differential and intuitive knob adjustment make commissioning straightforward for HVAC and refrigeration technicians.
