Johnson Controls P70CA-3 Pressure Control

The Johnson Controls P70CA-3 is a robust high pressure control engineered for precision sensing in commercial refrigeration and air conditioning systems. This SPST pressure switch features a single pole, single throw contact action designed to close high and open low, making it an essential component for high-pressure cutout or condenser fan cycling. With an adjustable range of 50 to 450 psi and a field-adjustable differential of 60 to 150 psi, this control offers the versatility required for various "All Range" refrigerants including R-12, R-22, R-134A, R-500, and R-502. The unit is equipped with a 36-inch capillary terminating in a 1/4-inch flare nut, ensuring a secure and vibration-resistant connection to the high side of the system. Rated for a maximum overpressure of 525 psig, the P70CA-3 provides reliable performance under demanding mechanical conditions, ensuring system safety and stable head pressure management for professional-grade HVACR installations.

Key Benefits

• Versatile Refrigerant Compatibility: Suitable for multi-refrigerant systems, reducing inventory requirements for service contractors.
• Wide Adjustment Range: Provides 50 to 450 psi setpoint flexibility, ideal for various high-pressure monitoring applications.
• Durable Construction: Built with a 36" capillary and flare nut to withstand mechanical stress and simplify installation in tight enclosures.
• Precise Differential Control: The 60-150 psi adjustable differential allows for fine-tuning system cycles to prevent short-cycling and protect the compressor.

Common Questions

Is the P70CA-3 suitable for high-limit cutout or fan cycling?
Yes, the close high open low action is specifically designed for condenser fan cycling (closing the circuit on pressure rise) or high-pressure safety cutout applications depending on the wiring configuration.

What is the maximum pressure this switch can handle without damage?
While the operating range ends at 450 psi, the P70CA-3 features a maximum overpressure rating of 525 psig, providing a safety margin against system spikes.

Does this unit come with the pressure connector?
The unit includes an integrated 36" capillary tube with a standard 1/4" female flare nut, allowing for direct attachment to a Schrader valve or access fitting.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.