Description
Johnson Controls P145NCB-12 Lube Oil Pressure Cutout Control
The Johnson Controls P145NCB-12 is a heavy-duty lube oil pressure cutout control engineered to protect compressors from dangerous low-oil-pressure conditions. Featuring a built-in 120-second time delay, this control allows the system to reach normal operating oil pressure at startup before initiating a safety shutdown — reducing nuisance trips while ensuring reliable protection. The manual reset design requires a deliberate technician reset after a lockout, preventing automatic restart and keeping your equipment and personnel safe.
Key Features
- 120-second time delay prevents nuisance shutdowns during compressor startup
- Manual reset lockout requires technician intervention after a safety trip
- Wide voltage compatibility: 120/240 VAC operation
- 425 PSIG maximum bellows pressure rating for high-pressure refrigeration applications
- 9 PSI fixed differential for consistent, repeatable switching performance
- 1/4″ Male Flare pressure connection for easy field installation
- Designed for use with commercial and industrial refrigeration compressors
Specifications
- Model: P145NCB-12
- Brand: Johnson Controls
- Function: Lube Oil Pressure Cutout Control
- Time Delay: 120 Seconds
- Voltage: 120/240 VAC
- Reset Type: Manual Reset
- Maximum Bellows Pressure: 425 PSIG
- Differential: 9 PSI Fixed
- Pressure Connection: 1/4″ Male Flare
Application
The P145NCB-12 is ideal for commercial and industrial refrigeration systems where compressor oil pressure monitoring is critical. It is commonly used on reciprocating compressors in supermarket refrigeration racks, process cooling systems, and other applications where oil pressure failure could result in costly compressor damage. The manual reset feature ensures that a qualified technician investigates the cause of any oil pressure failure before the system is returned to service.
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