The Johnson Controls P100AP-4 is a heavy-duty encapsulated pressure control engineered for precision in condenser fan cycling and low-pressure cutout applications. This direct mount pressure switch features a single-pole single-throw (SPST) configuration designed to open on pressure drop, ensuring reliable system cycling. Pre-calibrated for professional HVACR environments, the unit is set to open at 170 PSIG and close at 250 PSIG with an automatic reset function. Its compact, lightweight open construction allows for efficient installation directly onto 1/4 inch SAE female flare fittings with built-in Schrader depressors, significantly reducing labor time and the need for additional mounting brackets. Rated for 120/240 VAC, the P100AP-4 pressure switch is cross-compatible with the P100AP-4C, offering high-performance switching for a variety of non-corrosive refrigerants such as R-22, R-134a, R-404A, and R-410A. The snap-acting diaphragm is dust-tight and built to withstand the rigorous demands of commercial refrigeration, ice machines, and food service equipment. For contractors managing head pressure in varying ambient conditions, this unit provide repeatable, tamper-proof control across a broad range of operating temperatures. Key Benefits Optimized Fan Cycling: Precisely maintains head pressure by cycling condenser fans at 170/250 PSIG setpoints. Direct Mount Connectivity: Integrated 1/4 inch female flare fitting with Schrader depressor enables fast, tool-free mounting to refrigeration lines. Broad Compatibility: Fully interchangeable with P100AP-4C and suitable for all common non-corrosive refrigerants. Durable Encapsulation: Dust-tight, snap-action switch design ensures reliable performance in harsh commercial environments. Contractor-Grade Lead Wires: Includes 48-inch electrical leads for flexible routing within control cabinets. Common Questions What is the difference between the P100AP-4 and P100AP-4C? These models are technically identical in performance, setpoints, and electrical ratings; the "C" suffix typically denotes bulk or commercial packaging from the manufacturer. Can this control be used as a safety cutout? While primarily used for fan cycling, its SPST "open on drop" action makes it suitable for low-pressure limit protection in specified systems. Is the reset manual or automatic? This specific model features an automatic reset, meaning the contacts will close automatically once the pressure rises back to the 250 PSIG setpoint. 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.
