Description
The Johnson Controls P28DN-4 is a professional-grade lube oil pressure control engineered to protect compressors from low oil pressure conditions. With a built-in 30-second time delay on startup, this control gives the lubrication system time to build adequate pressure before triggering a fault — minimizing nuisance trips while still safeguarding critical equipment.
Key Features
- 30-second time delay prevents false trips during compressor startup
- Alarm terminals included for remote fault notification and system integration
- Manual reset operation ensures a technician reviews the fault condition before restarting
- Wide pressure sensing range of 8 to 70 PSIG accommodates a variety of commercial refrigeration and HVAC compressor applications
- Dual voltage compatibility — operates on 120 Vac or 240 Vac power supplies
Specifications
- Brand: Johnson Controls
- Model / SKU: P28DN-4
- Time Delay: 30 seconds
- Supply Voltage: 120/240 Vac
- Pressure Range: 8 to 70 PSIG
- Reset Type: Manual
- Alarm Terminals: Yes
Application
The P28DN-4 is designed for use in commercial refrigeration and HVAC systems where compressor lube oil pressure monitoring is required. The manual reset feature ensures that any low oil pressure event is investigated by a qualified technician before the system is returned to service, helping to prevent costly compressor failures and unplanned downtime.
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