The Johnson Controls P100AP-3 is a heavy-duty encapsulated pressure control engineered for precision condenser fan cycling in commercial refrigeration and air conditioning systems. This direct mount pressure switch features a compact, open construction design that allows for immediate installation onto 1/4-inch flare fittings without the need for additional mounting brackets. As an automatic reset pressure switch, it eliminates the need for manual intervention by cycling the fan based on head pressure, ensuring the system maintains optimal head pressure during low ambient conditions. Designed with a Single Pole Single Throw (SPST) switch action, the P100AP-3 is calibrated to open at 150 PSIG on a pressure drop and close at 225 PSIG. Its rugged snap-action mechanism provides reliable performance across a wide range of motor loads, supporting 120/240 Vac contact ratings for both pilot duty and direct motor control. This HVACR pressure control is an essential component for technicians looking to improve system efficiency and ensure stable refrigerant pressures in fluctuating environments. Key Benefits for Technicians Optimized Fan Cycling: Maintains head pressure by cycling fans at a 225 PSIG cut-in and 150 PSIG cut-out. Durable Encapsulation: Protects internal snap-action contacts from moisture, dust, and vibration for long-term reliability. Seamless Integration: Direct mount design with standard 18-inch leads allows for fast replacement and wiring. Versatile Electrical Compatibility: Rated for both 120V and 240V circuits, making it compatible with most standard condensing units. Common Contractor Questions Is the P100AP-3 adjustable? No, this unit is factory-calibrated with fixed setpoints (150 PSIG Open / 225 PSIG Close) to ensure precise, tamper-proof operation. Can this switch be used for low-pressure cut-out? While it is an SPST open on pressure drop switch, its specific setpoints are optimized for condenser fan cycling rather than standard low-pressure safety cut-out applications. What type of connection does it use? It utilizes a standard 1/4-inch female flare fitting for direct connection to the system's high-side access port. 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.
