P70AA-5C Johnson Controls Pressure Control

Overview

The Johnson Controls P70AA-5C is a single-pressure control designed primarily for low pressure cut-out, pump-down, and capacity control in commercial refrigeration and air conditioning applications. Engineered specifically for ammonia service, this rugged device features an open-low switch action that automatically interrupts the control circuit when pressure drops below the set point, helping protect valuable equipment from damage.

Features

• All-steel case and cover provide heavy-duty protection for internal components.
• Sight-Set calibrated pressure scale allows easy, visible pressure adjustments without removing the cover.
• Automatic reset action restores operation once pressure returns to safe operating levels.
• Designed with high-durability stainless steel internal connections to withstand harsh ammonia environments.

Specifications

• Pressure Range: 20 in. Hg to 100 PSI (psig)
• Adjustable Differential: 7 to 50 PSI (psig)
• Switch Configuration: Single-Pole Single-Throw (SPST)
• Switch Action: Open on Low Pressure
• Pressure Connection: 1/4 inch Stainless Steel Internal NPT
• Maximum Working Pressure: 100 PSI
• Maximum Overpressure / Bellows Pressure: 325 PSI
• Enclosure Rating: NEMA 1 standard

Applications

• Commercial refrigeration systems utilizing ammonia refrigerant.
• Commercial air conditioning systems requiring low-pressure cutout safety management.
• Pump-down control applications to isolate refrigerant circuits.
• Generic non-corrosive fluid and air environmental systems monitoring.