P545NCB-22C Johnson Controls LUBE OIL Control

Overview

The Johnson Controls P545NCB-22C is an electronic lube oil control designed for use on refrigeration compressors equipped with an oil pump that accepts a single-point differential pressure switch. It continuously monitors net lube oil pressure and locks out the compressor if the pressure falls below the manufacturer’s recommended level for longer than the designated time delay. This control is specifically designed for use with Copeland compressors and includes the necessary sensor and wiring harness.

Features

• Single-Pole Double-Throw (SPDT) relay contacts for liquid line solenoid and alarm applications.
• Built-in test circuit to verify proper control operation quickly without additional tools.
• Front-mount LED display panel that continuously indicates the status of the lubrication system.
• User-selectable anti-short cycle time delay (0, 35, 65, or 100 seconds) to minimize compressor short cycling.
• Backwards compatibility with previous Johnson Controls/Penn electronic lube oil controls for easy replacement.
• Improved noise immunity exceeding UL 991 requirements for transient overvoltage.

Specifications

• Voltage Rating: 120/240 VAC
• Frequency Rating: 50/60 Hz
• Contact Rating: 375 V-A Pilot Duty at 120 VAC, 750 V-A at 240 VAC
• Pressure Range: Fixed 12.75 PSI
• Time Delay: 120 Seconds
• Capillary Length: 40 inches
• Ambient Temperature Rating: -40 to 131 degrees Fahrenheit
• Dimensions: 4 in (Length) x 6 in (Height) x 3 in (Width)

Applications

• Designed primarily for environmental control and safety monitoring in commercial refrigeration systems.
• Used specifically on Copeland refrigeration compressors equipped with a compatible oil pump to prevent mechanical failure due to low oil pressure.