P70LA-1C Johnson Controls Pressure Control

Overview

The Johnson Controls P100AC-2C is a compact, economical, encapsulated direct-mount pressure control switch designed for reliable refrigeration and HVAC system protection. It monitors system pressure to safeguard compressors and air conditioning application loads, providing precise and repeatable snap-action On/Off control over a wide range of ambient conditions. Featuring an automatic reset mechanism, it operates under an Open Low configuration, meaning it interrupts the electrical circuit when the pressure drops to a specific setpoint and automatically re-closes once the pressure recovers.

Features

• Direct-mount, lightweight design allows for simplified installation directly onto the system piping.
• Encapsulated construction with an open construction housing provides high-impact durability.
• Automatic reset requires no manual intervention after system pressure recovery.
• Factory-calibrated, non-adjustable pressure setpoints ensure stable, long-term performance.
• Single-Pole Single-Throw (SPST) switching action engineered to open on low pressure.
• Built-in conduit clamp provides secure wiring management and protection.

Specifications

• Operating Pressure Rating: Opens at 15 PSIG (Cut-out) and Closes at 30 PSIG (Cut-in).
• Switch Configuration: SPST (Single-Pole Single-Throw), Open Low.
• Electrical Ratings: 120/240 Vac contact voltage compatibility.
• Contact Capacity: 6 Amp at 120/240 Volt AC (Full Load), 36 Amp at 120/240 Volt AC (Locked Rotor), 375 VA (Pilot Duty).
• Maximum Operating Pressure: 250 PSIG.
• Burst Pressure: 3500 PSI.
• Temperature Range: Refrigerant temperature from -65 to 275 degrees Fahrenheit; Ambient operating temperature from -20 to 150 degrees Fahrenheit.
• Approvals: UL Recognized for the United States and Canada as a refrigerant pressure limiting device.

Applications

• Low-pressure cutout protection for commercial refrigeration compressors.
• Commercial HVAC refrigerant circuit monitoring to prevent freezing or low charge damage.
• Condensing unit and water chiller low-pressure safety limit controls.
• General fan cycling control and commercial food service equipment pressure monitoring.