Johnson Controls P545NCB-82 Oil Control

As a direct replacement for the legacy P445NCB-82, the Johnson Controls P545NCB-82 Electronic Lube Oil Control provides reliable protection for refrigeration compressors using non-corrosive refrigerants. This 120/240 Vac oil pressure cutout is precision-engineered to monitor net lube oil pressure, featuring a fixed 120-second time delay that prevents nuisance shutdowns during startup while ensuring mechanical integrity. The unit operates with a 7 psi ± 1 psid setpoint, utilizing specialized SPDT relay contacts for seamless integration with alarm circuits and liquid line solenoid outputs.

Designed for professional HVACR environments, the P545NCB-82 includes front-mount LED indicators for real-time status monitoring and a user-selectable anti-short cycle timer (offering 0, 35, 65, or 100-second delays) to protect the motor from excessive wear. For contractors servicing Carlyle compressors, this control is the industry standard for maintaining optimal lubrication. The manual reset functionality ensures that any pressure loss is personally inspected by a technician, while the built-in test circuit allows for rapid functional verification without specialized tools.

• Direct Replacement: Seamlessly replaces the older P445NCB-82 lube oil control with updated electronic reliability.
• Enhanced System Protection: Integrated anti-short cycle timer minimizes compressor stress by preventing rapid restarts.
• Dual Voltage Versatility: Compatible with both 120V and 240V systems, reducing inventory requirements for service vans.
• Visual Diagnostics: High-visibility LEDs provide immediate feedback on lubrication status and timing sequences.
• Auxiliary Control: Dedicated outputs for liquid line solenoid and alarm systems prioritize system safety upon pressure loss.

Is the P545NCB-82 compatible with all refrigerants?
This control is specifically designed for use with non-corrosive refrigerants only; it should not be used in ammonia or other corrosive environments.

How do I verify the control is functioning correctly?
Technicians can use the built-in test circuit located on the face of the unit to simulate a pressure drop and verify the timing and lockout sequence.

Does this unit require a separate wiring harness?
While the control is compatible with the P400 single-point differential pressure switch, always verify if your specific kit includes the WHA-P400-100C harness for a complete installation.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.