P70CA-61C Johnson Controls Pressure Control

Overview

The Johnson Controls P70CA-61C is a high-pressure cutout control designed primarily for commercial refrigeration and air conditioning applications. Featuring Single-Pole Single-Throw (SPST) open-high switch action, this automatic reset control is engineered to cut out or open the circuit on a high-pressure rise, providing reliable protection for HVAC and refrigeration systems. It is also compatible with ammonia applications.

Features

• All-Steel Construction: Equipped with a rugged all-steel case and cover to provide long-lasting protection for internal components.
• Sight-Set Calibrated Adjustment: Features a visible pressure scale on the NEMA 1 enclosure, enabling full adjustments through the range without removing the cover.
• Automatic Reset: Automatically resets the switch action once pressure drops back to the safe, predefined level.
• High Reliability: Built with a dependable bellows element type that requires minimal amplification.

Specifications

• Pressure Range: 20 to 100 psi
• Adjustable Differential Range: 7 to 50 psi
• Factory Settings: Opens at 60 +/- 1 psi, closes at 40 +/- 1 psi
• Switch Action: SPST Open on Rise (Open High)
• Contact Form: SPST N.O. contacts (Line to M1 closes on high pressure, Main Line to M2 opens on high pressure)
• Enclosure Rating: NEMA 1 Universal Bracket Mounting
• Element Type: Bellows compatible with ammonia and non-corrosive refrigerants
• Approximate Weight: 1.63 to 1.71 lbs

Applications

• High-pressure cutout control for commercial air conditioning and refrigeration systems
• Head-pressure control and condenser fan cycling control strategies
• Environmental and industrial high-limit pressure safety monitoring
• Ammonia-based refrigeration loop configurations