Johnson Controls P400BD-1 Pressure Switch

The Johnson Controls P400BD-1 Pressure Switch provides critical single point differential oil pressure monitoring for commercial refrigeration and HVAC compressors. This OEM component acts as a direct replacement for P300BD-1 units, ensuring seamless integration into existing control circuits. Engineered with a 10 ± 1.5 PSID open point and a close point set at less than or equal to 3 PSID above the differential opening, this switch prevents catastrophic compressor failure due to low oil lubrication. The inclusion of the WHA-P400-125 wiring harness simplifies field installation, while the M20 x 1.5 threads provide a secure, standard connection point. Specifically designed for compatibility with P545NCB-25C/D series controls, the P400BD-1 is the professional choice for maintaining tight differential oil pressure control and protecting high-value equipment in demanding industrial environments.

Key Technical Benefits

• Direct Replacement: Fully compatible with legacy P300BD-1 installations for faster service calls.
• Precision Calibration: Maintains a 10 PSID open point with high accuracy to ensure optimal oil flow.
• Complete Assembly: Includes the WHA-P400-125 wiring harness, reducing the need for additional parts or specialized wiring.
• Specific Compatibility: Engineered for seamless operation with Johnson Controls P545NCB-25C/D controllers.
• Robust Construction: Built to withstand the constant pressure fluctuations and thermal stresses found in HVACR oil pressure applications.

Common Questions

Can I use the P400BD-1 to replace an older P300 series switch?
Yes, the P400BD-1 is the designated direct replacement for P300BD-1 models, featuring identical mounting specifications and setpoints.

What is the thread size for the pressure connection?
This unit utilizes M20 x 1.5 threads. It is essential to verify matching port sizes on the compressor or oil line before installation.

Does this switch provide a manual reset?
The P400BD-1 is a single point differential switch typically used in conjunction with a separate electronic or mechanical time delay control that may handle the reset function.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.