Johnson Controls P70AA-2 Pressure Control

Integrate the Johnson Controls P70AA-2 Pressure Control into your commercial refrigeration or air conditioning system for reliable head pressure fan cycling and system protection. This single pole high pressure control features a SPST switch action designed to close on a pressure rise and open on a pressure drop (Close High, Open Low). Engineered for versatility, it is fully compatible with non-corrosive refrigerants including R-12, R-22, R-134A, R-500, and R-502. The unit operates within a 0 psi to 150 psi range with an adjustable 12 psi to 40 psi differential, allowing for precise calibration of condenser fan operation to maintain stable head pressures. A 36-inch capillary with a 1/4 inch flare nut pressure connector ensures a secure fit even in high-vibration environments, supported by a robust 525 psig maximum overpressure rating. This electromechanical control provides direct motor control for single-phase applications, ensuring consistent performance in demanding HVACR field conditions.

• Versatile Refrigerant Compatibility: Designed for use with R-12, R-22, R-134A, R-500, and R-502.
• Precise Fan Cycling: Features an adjustable 12 to 40 psi differential for optimal condenser fan control.
• High Overpressure Protection: Rated for up to 525 psig to withstand system pressure spikes.
• Durable Construction: Includes an all-steel case and 36" capillary for long-term field reliability.
• Broad Application Range: Suitable for air conditioning, refrigeration, and non-corrosive fluid pressure monitoring.

Common Questions

The control features a "Sight-Set" calibrated scale. Use the range screw to set the cut-in point and the differential screw to determine the cutout point. Always verify your settings with a high-accuracy manifold gauge during the commissioning process.

The P70AA-2 is specifically configured for "Close High, Open Low" action, making it ideal for head pressure control or fan cycling. For low-pressure safety cutout applications, ensure your logic requires a circuit break on pressure drop.

This unit is designed to handle standard single-phase motor loads. For specific ampacity ratings at 120V or 240V, refer to the internal switch block markings to ensure compatibility with your condenser fan motor.

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.