Description
The Johnson Controls P45NAA-5 is a manual-reset oil pressure cutout control engineered to protect compressors from the damaging effects of low oil pressure. Designed for use with non-corrosive refrigerants across all ranges, this control provides reliable, time-delayed shutdown to prevent nuisance trips during normal compressor startup while ensuring the system shuts down safely when a genuine oil pressure fault is detected.
Key Features
- Manual reset operation — requires deliberate technician action before restart, helping prevent repeated compressor damage
- 120-second time delay shutdown — allows oil pressure to stabilize at startup before the control activates protection
- Wide shutdown pressure range of 7 to 60 PSI — suitable for a broad variety of commercial refrigeration and HVAC compressor applications
- 24 Vac/Vdc control voltage — compatible with standard low-voltage control circuits
- Compatible with all non-corrosive refrigerants — versatile across common refrigerant types used in commercial systems
Specifications
- SKU: P45NAA-5
- Brand: Johnson Controls
- Control Type: Oil Pressure Cutout
- Reset Type: Manual Reset
- Control Voltage: 24 Vac/Vdc
- Shutdown Pressure Range: 7 to 60 PSI
- Time Delay: 120 Seconds
- Refrigerant Compatibility: All Non-Corrosive Refrigerants
Application
The P45NAA-5 is ideal for commercial refrigeration systems and HVAC equipment where compressor protection is critical. The 120-second time delay accommodates the brief period during startup when oil pressure may not yet be fully established, reducing unnecessary shutdowns. Once tripped, the manual reset design ensures a qualified technician must inspect and clear the fault before the system is returned to operation — a key safety feature for protecting expensive compressor equipment.
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