Johnson Controls P170AB-12 Pressure Control

The Johnson Controls P170AB-12 is a professional-grade low pressure control designed for heavy-duty commercial refrigeration and air conditioning systems. This SPST open-low pressure switch is built with an all-steel case and cover to withstand the rigors of mechanical rooms while protecting internal MICRO-SET components. It features a versatile operating range of 12" Hg to 80 psi and an adjustable differential of 5 to 35 psi, making it ideal for low pressure cut-out, pump-down control, and capacity management. The unit includes a 1/4" male external flare connector for secure line integration and is compatible with all non-corrosive refrigerants. With multi-voltage electrical ratings of 120/208/240 VAC, it provides reliable condenser fan cycling and compressor protection. The limited knob adjustment ensures that setpoints remain protected from tampering after the initial calibration, maintaining system stability across various environmental conditions.

• Broad Compatibility: Engineered for use with all common non-corrosive refrigerants in commercial HVACR applications.
• Precision Tuning: Features high-visibility Sight-Set calibrated pressure scales for accurate setpoint adjustments without removing the cover.
• Rugged Durability: The NEMA 1 enclosure and all-steel construction provide long-term protection against mechanical impact.
• Universal Wiring: Supports standard 120/208/240 VAC single-phase electrical configurations for flexible field installation.
• System Security: Includes limited knob adjustment hardware to prevent unauthorized field changes to critical pressure settings.

• What is the primary function of the SPST Open-Low action? This switch is designed to open the circuit on a pressure drop, effectively acting as a low pressure cut-out to protect the compressor from vacuum or low-charge conditions.
• Can I use this for pump-down cycles? Yes, the P170AB-12 is frequently used for pump-down control due to its adjustable differential and reliable SPST switch mechanism.
• Is this control compatible with R-410A or R-134a? Yes, it is fully compatible with these and other non-corrosive refrigerants, provided the pressure settings fall within the 12" Hg to 80 psi range.

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.