Johnson Controls P70AA-400 Pressure Control

Designed for professional contractors, the Johnson Controls P70AA-400 is an industrial-grade high pressure control engineered specifically for condenser fan cycling and high-side pressure management. This SPST pressure switch features an Open-Low action, meaning it breaks the circuit on a pressure drop and makes on a pressure rise, ensuring optimal head pressure control in systems using R410A refrigerant. With a versatile adjustable pressure range of 100 to 470 psi and a differential range of 35 to 200 psi, technicians can fine-tune performance for specific ambient conditions. The 36-inch capillary and 1/4-inch flare nut allow for flexible mounting away from high-vibration areas, while the NEMA 1 steel enclosure provides the durability required for commercial HVACR environments. This HVAC pressure controller utilizes a Sight-Set calibrated scale for visible, accurate adjustments without opening the housing, simplifying routine maintenance and field calibration.

• Optimized for R410A: Built to handle the higher operating pressures of modern high-efficiency cooling systems.
• Precise Fan Cycling: Maintains stable head pressure to prevent evaporator icing and ensure consistent expansion valve performance.
• Sight-Set Calibration: Internal scale allows for rapid set-point verification and adjustment during commissioning.
• Vibration Resistance: The 36" capillary lead isolates the bellows from compressor-induced harmonics, extending component life.
• Rugged Build: Heavy-duty steel cover and case protect the internal high pressure cutout mechanism in demanding mechanical rooms.

What is the switch action for the P70AA-400?
This model is a Single Pole Single Throw (SPST) switch with an Open-Low configuration, typically used to close the circuit to a fan motor as pressure rises.

Can this be used with non-corrosive refrigerants other than R410A?
Yes, it is compatible with most common non-corrosive refrigerants, provided the system pressures fall within the 100 to 470 psi range.

How do I adjust the pressure settings?
Technicians can use the range and differential screws located on top of the unit to match the condenser fan control requirements dictated by the specific equipment manufacturer.

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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.