P70AA-118C Johnson Controls Pressure Control

Overview

The Johnson Controls P70AA-118C is a high-pressure cutout and condenser fan cycling control designed primarily for commercial refrigeration and air-conditioning systems. It regulates system pressure using an internal bellows assembly to actuate switch contacts based on rising or falling pressures.

Features

• Heavy-duty all-steel case and cover provides rugged protection for internal components.
• Sight-set calibrated pressure adjustment displays a visible scale for straightforward, cover-on settings.
• Dual-circuit contact block features a 4-wire configuration for flexible control options.
• Long-lasting contact structure operates with minimal bounce on make.
• Includes a universal mounting bracket for ease of installation.

Specifications

• Pressure Range: 100 to 400 psi
• Pressure Differential: 35 to 200 psi (adjustable)
• Switch Type: Single-Pole Single-Throw (SPST)
• Switch Action: Open Low (opens on low pressure, closes on high pressure)
• Reset Action: Automatic reset
• Pressure Connection: 36-inch capillary tubing with a 1/4-inch flare nut
• Maximum Working/Bellows Pressure: 475 psig
• Enclosure Rating: NEMA 1
• Compatible Media: Non-corrosive refrigerants, air, water, and oil

Applications

• Condenser fan cycling control to optimize head pressure in refrigeration systems.
• High-side pressure operating control on commercial air-conditioning and cooling units.
• General limit protection and system control across air, water, or oil pressure monitoring applications.