Description
The Johnson Controls P400BD-1 is a single point differential oil pressure switch engineered for reliable compressor protection in commercial and industrial HVAC and refrigeration systems. It monitors the differential pressure between the oil pump outlet and crankcase to safeguard compressors against low oil pressure conditions before damage can occur.
Key Specifications
- Switch Type: Single Point Differential Oil Pressure Switch
- Open Point (Differential Pressure): 10 ± 1.5 Psid
- Close Point: Less than or equal to 3 Psid (differential above open point)
- Thread Connection: M20 x 1.5
- Includes Wiring Harness (WHA-P400 series)
Product Overview
The P400BD-1 measures the pressure differential across the compressor oil pump and opens its contacts when that differential drops to the set open point of 10 ± 1.5 Psid, signaling a low oil pressure condition. The switch resets (closes) when the differential rises back above the close point threshold of 3 Psid above the open point, providing a clear and reliable hysteresis band for system protection logic.
Features & Benefits
- Protects compressors from low oil pressure damage in commercial refrigeration and HVAC applications
- Precise differential pressure sensing with a defined open and close point for stable operation
- M20 x 1.5 threaded connection for secure, leak-free installation on compressor oil circuits
- Includes wiring harness (WHA-P400 series) for simplified field wiring and reduced installation time
- Single point design provides straightforward integration into compressor protection circuits
- Backed by Johnson Controls engineering quality and reliability
Typical Applications
- Commercial refrigeration compressor protection
- HVAC chiller and rooftop unit compressor oil pressure monitoring
- Industrial refrigeration systems
- Any application requiring differential oil pressure safety control
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