Description
The Johnson Controls P128AA-17 is a professional-grade lube oil pressure control engineered to protect refrigeration compressors from low oil pressure conditions. Designed for commercial and industrial refrigeration applications, this control monitors the differential oil pressure and shuts down the compressor if safe operating pressure is not maintained — helping prevent costly compressor damage and unplanned downtime.
Key Features
- 1/4″ SAE flare connectors — no capillary tubing required for simplified installation
- Manual reset operation ensures the system cannot restart automatically after a fault, requiring a deliberate technician reset
- 120-second time delay on startup allows oil pressure to build before the control activates, preventing nuisance trips
- Wide adjustable cut-out pressure differential range of 8–70 PSI to suit a variety of compressor and system requirements
- Compatible with non-corrosive, all-range refrigerants for broad application versatility
- Dual-voltage design: operates on 120 VAC or 240 VAC for flexible electrical integration
Specifications
- Brand: Johnson Controls
- SKU: P128AA-17
- Connection Type: 1/4″ SAE Flare (no capillary tubing)
- Reset Type: Manual Reset
- Time Delay: 120 Seconds
- Adjustable Cut-Out Pressure Difference: 8–70 PSI
- Supply Voltage: 120/240 VAC
- Refrigerant Compatibility: Non-corrosive, all-range refrigerants
Application
The P128AA-17 is ideal for use on commercial refrigeration compressors where reliable oil pressure monitoring is critical. The manual reset feature ensures that a qualified technician investigates and resolves the root cause of any low oil pressure fault before the system is returned to service — a best practice for protecting expensive compressor assets.
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