Johnson Controls P170CA-400 Pressure Control

The Johnson Controls P170CA-400 is a heavy-duty, single-pole single-throw (SPST) high pressure cutout control designed for commercial refrigeration and air conditioning applications. Engineered for precision and longevity, this auto reset pressure switch features an all-range design compatible with non-corrosive refrigerants, including R410A. It operates with an open-high switch action, effectively cutting out the circuit when pressures exceed the user-defined threshold within its 200 psi to 610 psi range. The unit utilizes pressure actuated bellows for reliable mechanical movement, ensuring a long-life contact structure with no bounce on make.

For seamless integration into existing systems, the P170CA-400 comes standard with a 1/4 inch external flare connector. This PENN pressure control is rated for 120/208/240 VAC electrical systems, making it a versatile choice for direct control of AC motors or as part of a more complex safety circuit. Its robust NEMA 1 enclosure and high-side limit capabilities provide essential protection against excessive system pressures in demanding HVACR environments.

Key Benefits:

• Broad Refrigerant Compatibility: Suitable for use with air, water, and all common non-corrosive refrigerants.
• Precise High-Side Protection: Adjustable pressure range settings from 200 to 610 psi facilitate exact system calibration.
• Automatic Reset Functionality: Eliminates the need for manual intervention once system pressures return to the safe differential range.
• Durable Construction: Built with high-quality bellows and contact structures to withstand frequent cycling in commercial settings.
• Simplified Installation: Features a standard 1/4 inch MFL connection for easy replacement of older P70 or P170 series controls.

Common Questions:

What is the maximum working pressure for this control?
The P170CA-400 is rated for a maximum working pressure of 690 psig, making it suitable for high-pressure systems.

Can this be used on ammonia systems?
No, this specific model is designed for non-corrosive refrigerants only. For ammonia applications, you must use a stainless steel internal NPT model specifically rated for ammonia.

Is the differential adjustable?
Yes, this model features an adjustable differential range, typically between 60 and 150 psi, allowing for fine-tuned control of the high-pressure cutout point.

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.