Johnson Controls P170CA-3 Pressure Control

The Johnson Controls P170CA-3 is a heavy-duty single-pole single-throw (SPST) pressure control designed for high-side pressure limiting and condenser fan cycling in commercial refrigeration and HVAC systems. Built as the direct P70CA-2 replacement, this control features a robust all-steel case and cover to protect internal components in demanding mechanical rooms. It operates with an open-high switch action, meaning the contacts open on pressure rise to safeguard the system against overpressure conditions. With a versatile pressure range of 50 to 450 psi and a 1/4" external flare connector, it is compatible with all non-corrosive refrigerants, including high-pressure R-410A systems.

This electromechanical pressure switch utilizes a "Sight-Set" calibrated scale, allowing technicians to perform precise pressure setpoint adjustment without removing the enclosure cover. The P170CA-3 high pressure cutout is rated for 120/208/240 VAC electrical configurations, making it a standard choice for commercial refrigeration pressure control. Its automatic reset functionality ensures the system returns to operation once pressures normalize, reducing unnecessary service calls while maintaining critical safety limits.

• System Compatibility: Engineered for use with non-corrosive refrigerants and standard 1/4" flare fittings for seamless field integration.
• Field Adjustability: Features a visible calibrated pressure scale for fast and accurate setpoint verification during commissioning.
• Direct Replacement: Simplifies inventory by serving as the official P70CA-2 drop-in replacement with matching mounting footprints.
• Robust Construction: The NEMA 1 steel enclosure provides long-term durability against vibration and environmental wear.
• Reliable Switching: High-capacity SPST open-high contacts provide dependable load-carrying performance for motor control.

What is the difference between the P170CA-3 and the P70CA-2?
The P170CA-3 is the current production model and a direct functional replacement for the legacy P70CA-2, offering the same pressure ranges and electrical ratings.

Is this control compatible with R-410A?
Yes, the P170CA-3 is rated for high-pressure non-corrosive refrigerants, making it suitable for modern R-410A air conditioning and refrigeration applications.

Does this unit require a manual reset after a high-pressure trip?
No, this specific C-series model features automatic reset logic. For applications requiring a manual lockout, the D-series version should be selected.

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.