P170AB-12C Johnson Controls Pressure Control

Overview

The Johnson Controls P170AB-12C is a high-performance, low-pressure control switch designed primarily for commercial refrigeration and air conditioning systems. This single-pressure control unit monitors system pressures to protect against excessive loss of refrigerant or pressure drops. Utilizing a pressure-sensitive bellows mechanism linked via a 1/4-inch male flare connector, it senses alterations in system pressure and triggers a snap-action electrical SPST switch to regulate equipment operation safely.

Features

• All-steel case and cover built to provide long-lasting, rugged protection for internal components.
• Sight-Set calibrated pressure adjustment displays a visible scale, fully adjustable through the range without removing the cover.
• MICRO-SET differential option allows for precise control on critical low-pressure applications.
• Automatic reset action restores system operations once pressure returns to safe levels.
• Premium dead-ended capacitive sensing element requires minimal amplification for long-term stability.

Specifications

• Pressure Range: 12 in. Hg to 80 PSI
• Pressure Differential: 5 to 35 PSI
• Maximum Working Pressure: 80 PSI
• Maximum Overpressure: 525 PSIG
• Switch Type / Action: SPST, Opens on Low Pressure
• Pressure Connection Size: 1/4 inch External Male Flare
• Enclosure Type: NEMA 1
• Compatible Fluids: Non-corrosive refrigerants

Applications

• Low-pressure cut-out control to prevent system operation under insufficient pressures.
• Commercial refrigeration and air conditioning compressor protection.
• Pump-down control configurations for managing refrigerant cycles.
• Capacity control applications on non-corrosive fluid systems.