Johnson Controls P70DA-400 Pressure Control

The Johnson Controls P70DA-400 is an industrial-grade high pressure cutout control designed for heavy-duty commercial refrigeration and HVAC applications. This SPST open-high pressure switch is engineered to protect compressors from excessive head pressure by interrupting the electrical circuit when system pressure exceeds the user-defined setpoint. With a robust adjustment range of 200 to 610 psi, this manual reset pressure control ensures that a technician manually inspects the system before operation resumes, preventing repetitive cycling under fault conditions. The unit is equipped with a 36-inch capillary featuring a 1/4-inch flare nut for versatile mounting and vibration dampening. This model is functionally identical to the P70DA-400C and serves as a reliable refrigeration pressure limiting control for non-corrosive refrigerants. Its NEMA 1 enclosure and snap-acting contacts provide the durability required for high-duty cycle equipment found in modern mechanical rooms.

• Enhanced System Safety: The manual reset lockout mechanism prevents equipment from restarting automatically after a high-pressure trip, ensuring critical diagnostics are performed.
• Broad Compatibility: This P70 Series control is rated for non-corrosive refrigerants and provides high pressure protection across a wide 200-610 psig range.
• Durable Construction: Features high-amp snap-acting contacts to minimize arcing and extend the service life of internal electrical components.
• Flexible Installation: Includes a 36" capillary with 1/4" flare nut, allowing for remote mounting away from high-vibration discharge lines.
• Wide Application: Ideal for use as a condenser fan cycling control or high-limit cutout in commercial air conditioning and refrigeration systems.

Is the P70DA-400 compatible with R-410A systems?
Yes, the 610 psi upper limit and 690 psi maximum working pressure make this P70 pressure control suitable for high-pressure refrigerants common in modern HVAC units.

What is the difference between the P70DA-400 and P70CA-400?
The P70DA-400 specifically features a manual reset lockout, requiring human intervention after a cutout, whereas the "CA" models typically feature automatic reset functionality.

How do I adjust the setpoint on this manual reset model?
Adjust the cutout setpoint by turning the range screw on the right side of the scale. Note that single pole pressure controls with manual reset have a fixed differential, so there is no differential adjustment screw.

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.