Johnson Controls P70DA-2 Pressure Control

The Johnson Controls P70DA-2 is a heavy-duty single pole high pressure control engineered specifically for HVACR ammonia applications. This SPST pressure switch features a 1/4 inch female NPT pressure connector and provides a reliable cut-out range from 50 to 450 psi. Designed for critical safety monitoring, the unit operates on an open high close low logic with a manual reset lockout, ensuring the system remains offline until a technician inspects the overpressure event. With a maximum overpressure rating of 525 psig, it serves as an exact replacement for the P70DA-2C model. The rugged construction and specialized bellows make it the industry standard for ammonia-based refrigeration pressure control, offering precise setpoint repeatability in demanding industrial environments. Proper installation of this high pressure cutout prevents compressor damage and ensures compliance with high-side safety protocols.

• Ammonia Compatible: Specialized internal components designed for systems utilizing ammonia refrigerant.
• Manual Reset Safety: Integrated lockout differential prevents equipment short-cycling after a high-pressure trip.
• Wide Adjustment Range: Field-adjustable settings from 50 to 450 psi provide flexibility for various head pressure requirements.
• Universal Replacement: Fully interchangeable with the Johnson Controls P70DA-2C for seamless field service.
• High Burst Pressure: Sustains up to 525 psig maximum overpressure without calibration drift.

What is the difference between the P70DA-2 and the P70DA-2C?
These two model numbers are functionally identical, sharing the same specifications, SPST contact configuration, and ammonia compatibility.

Can this control be used for R-410A or other synthetic refrigerants?
While the pressure range is sufficient, this specific model is optimized for ammonia. For standard high-pressure synthetic applications, verify and select the corresponding P70 series designed for non-corrosive refrigerants.

Does this switch automatically reset when pressure drops?
No, this is a manual reset lockout control. Once the high pressure cutout setpoint is reached, the contacts remain open until the reset button is physically depressed by a technician.

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.