Johnson Controls P170AA-118 Pressure Control

The Johnson Controls P170AA-118 is a professional-grade high pressure cutout control engineered for precision sensing in HVACR applications. This SPST pressure switch features an "open on low" configuration, making it an essential component for condenser fan cycling control and high-pressure safety monitoring. Designed for use with non-corrosive refrigerants, it operates within a broad 100-400 PSIG range and offers a field-adjustable differential of 35 to 200 PSI, allowing technicians to fine-tune system cycling to specific load requirements. The unit includes a 36-inch capillary with a 1/4" male flare connector, ensuring a secure mechanical interface even in high-vibration environments. Whether managing head pressure or protecting a compressor from excessive discharge levels, the P170AA-118 provides the rugged reliability required by commercial contractors.

• Versatile Electrical Compatibility: Rated for use across 120/208/240 VAC circuits, simplifying truck stock by covering multiple common voltage requirements.
• Precise Pressure Management: The adjustable pressure range and wide differential settings provide superior control over fan cycling for optimized head pressure.
• Rugged Construction: Built with high-quality internal bellows and a durable housing to withstand the rigors of mechanical rooms and outdoor condensing units.
• Ready for Install: The integrated 36" capillary provides sufficient reach for most manifold or liquid line service port configurations without needing additional extensions.

What is the function of the 'Open on Low' switch in this model?
In the P170AA-118, the SPST switch opens the circuit when the pressure drops below the setpoint (cut-out) and closes when the pressure rises to the cut-in point. This is standard for high pressure control and fan cycling applications.

Can this control be used with R-410A or R-134a?
Yes, as long as the refrigerant is classified as non-corrosive. Given the 100-400 PSIG range, it is commonly utilized for managing head pressure in medium and high-temp systems.

Is the differential adjustment fixed or adjustable?
This model features a fully adjustable differential ranging from 35 to 200 PSI, giving the contractor full control over the deadband to prevent short-cycling of the condenser fan.

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.