Johnson Controls P170LB-1 Pressure Control

The Johnson Controls P170LB-1 is a professional-grade Dual Pressure Control engineered for precise management of both high-side and low-side pressures in commercial refrigeration and air conditioning systems. This electromechanical controller features a Single-Pole Single-Throw (SPST) switch action, providing reliable cut-out and pump-down control by opening the circuit when pressures exceed or fall below your specific setpoints. The low-pressure side operates from 20" Hg to 100 psi with an adjustable 7-50 psi differential, while the high-pressure side covers 100 to 500 psi with a factory-fixed 65 psi non-adjustable differential. Designed for durability in the field, it includes a 1/4" external flare connector for standard manifold connections and a limited knob adjustment on the low cut-out to prevent tampering. This unit is compatible with all non-corrosive refrigerants and serves as a direct replacement for various Ranco and Penn pressure switches, ensuring seamless integration into existing HVACR motor control circuits.

• Dual-Side Protection: Integrated high and low-side bellows provide comprehensive compressor protection in a single compact housing.
• Tamper-Resistant Precision: The low cut-out limited knob adjustment restricts unauthorized range changes, maintaining system calibration after installation.
• Rugged Construction: Features an all-steel NEMA 1 enclosure that protects internal switch components from the harsh environments of mechanical rooms.
• Simplified Installation: The 1/4" male flare connection and included universal mounting bracket reduce field labor during replacements.

What refrigerants are compatible with the P170LB-1?
This control is designed for use with most non-corrosive refrigerants, including common HFCs and HCFCs used in commercial cooling and refrigeration applications.

Does this unit require a manual reset?
No, the P170LB-1 is an automatic reset model. For applications requiring a manual lockout for safety compliance on the high-pressure side, refer to the P170MA series.

How does the SPST switch action function in this dual control?
The SPST switch remains closed during normal operating pressures and opens the main circuit if the low-side pressure drops below the cut-out point or if the high-side pressure rises above the high-pressure limit.

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.