Johnson Controls P100AP-201 Pressure Control

The Johnson Controls P100AP-201 Pressure Control is a rugged, automatic reset switch engineered for critical low pressure cutout protection in commercial HVAC and refrigeration systems. This direct-mount control utilizes a Single Pole Single Throw (SPST) contact configuration designed to open circuit on a pressure drop, preventing compressor operation under unsafe conditions. The factory-calibrated setpoints are precision-tuned to open at 10 PSIG and automatically close at 32 PSIG, eliminating the need for manual intervention after temporary pressure fluctuations. Built with an open construction housing and an encapsulated switch module, the P100AP-201 ensures reliable performance in 120/240 VAC applications. This model features a standard 1/4" female flare connection equipped with a built-in Schrader depressor, allowing for direct installation onto the high or low side of the refrigeration circuit. It is functionally identical to the P100AP-201C, providing a direct service replacement for many OEM applications requiring precise pressure monitoring.

Key Technician Benefits

• Automatic Reset Functionality: Minimizes unnecessary service calls by automatically resuming operation once suction pressure returns to safe levels at 32 PSIG.
• Encapsulated Design: Protects internal electrical contacts from dust and moisture ingress, a crucial requirement for long-term reliability in condenser environments.
• Seamless System Integration: The 1/4" female flare with depressor allows for direct mounting without the need for additional capillary tubes or complex mounting brackets.
• Universal Voltage Compatibility: Rated for both 120V and 240V circuits, making it a versatile stock item for various job site requirements.
• Precise Safety Cutout: Ensures low pressure protection to prevent vacuum conditions and coil freeze-ups, extending the service life of the compressor.

Common Questions

Is the P100AP-201 compatible with R-410A and R-22 systems?
Yes, this pressure control is designed for use with non-corrosive refrigerants. However, always verify that the 10/32 PSIG operating window aligns with your specific refrigerant?s pressure-temperature chart for the required safety threshold.

What is the difference between the P100AP-201 and the P100AP-201C?
These parts are functionally identical. The 'C' suffix typically denotes a commercial packaging variant, but the technical specifications, setpoints, and mounting connections are exactly the same.

Can this switch be used on the high-pressure side?
While it can physically be mounted to a high-side port, this model is specifically a low-pressure cutout that opens on pressure drop. High-pressure safety controls typically open on a pressure rise, so ensure your circuit logic matches the "open on drop" function of this SPST switch.

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.