P170NA-1C Johnson Controls Pressure Control

Overview

The Johnson Controls P170NA-1C is a dual pressure control designed primarily for commercial refrigeration and air conditioning systems. It functions as a combination high and low pressure control, providing single-device regulation of the compressor by responding directly to changes in system pressure on both the high and low sides. This model features a manual reset option for both the low-pressure and high-pressure sides, requiring manual intervention to restart operations after a lockout event.

Features

• All-steel case and cover provide rugged, long-lasting protection for internal electrical and mechanical components.
• Sight-Set calibrated pressure adjustment offers a highly visible scale for easy field adjustments without removing the enclosure cover.
• SPST switch action delivers reliable direct control of an AC motor or compressor within its electrical ratings.
• Dual manual reset lockout mechanism provides trip-free security on both high and low pressure thresholds, ensuring the control cannot be overridden or reset until system pressure returns to safe operating conditions.

Specifications

• Product Code: P170NA-1C
• Brand: Johnson Controls / PENN
• Switch Type: SPST (Single-Pole Single-Throw)
• Low Pressure Range: 20 in. Hg to 100 psi (-68 to 690 kPa)
• Low Pressure Differential: Fixed (manual reset lockout)
• High Pressure Range: 100 to 500 psi (690 to 3,447 kPa)
• High Pressure Differential: Lockout requires manual reset
• Pressure Connection: 1/4 inch external male flare connector
• Maximum Low-Side Overpressure: 325 psig (2,241 kPa)
• Maximum High-Side Overpressure: 525 psig (3,620 kPa)
• Compatibility: Designed for use with non-corrosive refrigerants

Applications

• Commercial refrigeration compressor systems requiring safety cut-out protection.
• High-pressure and low-pressure limiting control in air conditioning applications.
• HVAC systems requiring manual intervention and visual status validation following high-side or low-side pressure faults.