P400BD-1C Johnson Controls Pressure Switch

Overview

The Johnson Controls P400BD-1C is a single-point differential lube oil pressure switch engineered to provide reliable compressor protection in commercial and industrial HVAC and refrigeration systems. It monitors the differential pressure between the oil pump outlet and the crankcase to safeguard compressors against low oil pressure conditions, acting as a critical safety or primary control device. Designed to operate seamlessly with Johnson Controls P545NCB-25C/D controllers, it serves as a direct replacement for legacy P300BD-1 models.

Features

• Direct replacement for legacy P300BD-1 installations with identical mounting specifications.
• Precision calibration designed to provide repeatability and stability over time and temperature fluctuations while minimizing false trips.
• Straightforward integration into compressor protection circuits.
• Includes a dedicated wiring harness (WHA-P400-125) to simplify field installation and reduce setup time.
• Robust construction built to withstand constant pressure fluctuations and thermal stresses.

Specifications

• Open Point (Differential Pressure): 10.0 ± 1.5 psid
• Close Point (Differential above Open Point): Less than or equal to 3.0 psid
• Thread Connection: M20 x 1.5
• Ambient Operating Temperature Range: 0 to 221°F (-18 to 105°C)
• Ambient Storage Temperature Range: -40 to 250°F (-40 to 120°C)
• Shipping Weight: 0.5 lb (0.232 kg)
• Compatibility: Fits compressors manufactured by Bitzer; coordinates with P545 series controls

Applications

• Commercial refrigeration compressor protection.
• Industrial refrigeration systems.
• HVAC chiller and rooftop unit compressor oil pressure monitoring.
• Any application requiring differential lube oil pressure safety control to prevent compressor failure.