P170DA-1C Johnson Controls Pressure Control

Overview

The Johnson Controls P170DA-1C is a high-pressure electromechanical control designed primarily for high-pressure cut-out, head-pressure control, and condenser fan cycling in commercial refrigeration and air conditioning applications. It features a Single-Pole Single-Throw (SPST) open-high switch action that activates upon a pressure rise, providing a reliable safety cutout mechanism. Equipped with a manual reset lockout mechanism, this control ensures that the system remains off after a high-pressure trip until it is manually reset by a technician, preventing continuous cycling under unsafe conditions.

Features

• All-steel case and cover provide long-lasting, rugged protection for internal components.
• Sight-set calibrated pressure adjustment displays a visible pressure scale for easy setup without removing the cover.
• Manual reset lockout option offers trip-free operation that cannot be overridden or reset until system pressure drops to a safe level.
• Designed for compatibility with most common non-corrosive refrigerants, including R410A.
• Compact footprint equipped with a standard pressure connection style for mounting flexibility.

Specifications

• Switch Action: SPST Open on High
• Pressure Range: 50 to 500 psi (345 to 3,448 kPa)
• Differential Pressure: 60 to 150 psi (414 to 1,034 kPa)
• Pressure Connection: 1/4 inch Male External Flare Connector
• Maximum Working Pressure: 525 psig (3,620 kPa)
• Enclosure Type: NEMA 1 standard
• Electrical Ratings: Supports direct control of AC motors within the control’s electrical rating; pilot duty rated at 125 VA at 120 to 600 VAC.

Applications

• Commercial refrigeration high-pressure cut-out control
• Air conditioning system safety head-pressure monitoring
• Condenser fan cycling control
• Pressure limiting control in non-corrosive fluid systems