Description
The Johnson Controls P70AB-12 is a single-pole, single-throw (SPST) low pressure control engineered for precise pressure sensing and switching in commercial HVAC and refrigeration applications. Configured Close High/Open Low, this control energizes the circuit as pressure rises and de-energizes it as pressure falls, making it ideal for low-side refrigerant pressure monitoring, compressor protection, and system safety cutout duties.
Key Features
- SPST (Single Pole, Single Throw) switching action — Close High, Open Low
- Sensing range: 12 in. WC to 80 PSI for broad low-pressure application coverage
- Adjustable differential: 5 PSI to 35 PSI for flexible setpoint tuning
- Maximum overpressure rating: 525 PSIG for safe operation under surge conditions
- 36″ capillary with 1/4″ flare nut pressure connector for easy field installation
- Cutout knob adjustment for convenient, tool-free setpoint changes
- Micro Set design for accurate, repeatable control performance
Specifications
- Model: P70AB-12
- Brand: Johnson Controls
- Switch Type: SPST
- Action: Close High / Open Low
- Pressure Range: 12 in. WC to 80 PSI
- Differential Range: 5 PSI to 35 PSI
- Maximum Overpressure: 525 PSIG
- Capillary Length: 36 inches
- Pressure Connection: 1/4″ Flare Nut
- Adjustment: Cutout Knob
- Design: Micro Set
Application
The P70AB-12 is well-suited for low-pressure cutout and safety control in refrigeration systems, chillers, and commercial air conditioning equipment. Its wide sensing range and adjustable differential allow technicians to dial in precise operating parameters, while the 525 PSIG maximum overpressure rating ensures the control withstands transient pressure spikes without damage. The 36″ capillary with 1/4″ flare nut connection simplifies installation across a variety of system configurations.
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