Danfoss 060B200366 MP54 Pressure Control

The Danfoss 060B200366 MP54 differential pressure control is a critical safety component designed specifically for oil pressure protection in refrigeration compressors. This dual-purpose switch monitors the pressure difference between the oil pump discharge and the compressor crankcase, ensuring adequate lubrication to prevent catastrophic bearing failure. Operating with a fixed 45-second time delay, the MP54 allows for initial oil pressure buildup during startup while protecting against intermittent pressure drops during standard operation. The unit features 1/4" flare connections and is compatible with HCFC and non-flammable HFC refrigerants. Engineered for rugged field use, it includes a changeover switch (SPDT) that can trigger an alarm circuit when the pressure differential falls below the setpoint range of 4.3 to 65 psi. For technicians, the MP54 oil pressure switch provides reliable mechanical cutout functionality without the complexity of electronic sensors, making it a standard replacement for maintaining compressor lubrication safety in commercial systems.

• Mechanical Time Delay: The integrated 45-second thermal relay prevents nuisance tripping during short-term pressure fluctuations.
• Broad Compatibility: Suitable for AC and DC applications, interfacing easily with most commercial compressor control strings.
• Adjustable Differential: Allows for precise calibration based on specific compressor manufacturer requirements.
• Fieldproven Reliability: Minimal moving parts ensure long-term performance in high-vibration HVACR environments.

What is the purpose of the 45-second delay on the MP54?
The time delay allows the oil pump to establish sufficient pressure upon startup and prevents the system from shutting down during brief, non-critical pressure drops.

Can this control be used with Ammonia (R717)?
No, the 060B200366 is designed for use with fluorinated refrigerants. For ammonia applications, a stainless steel version is required.

How do I wire the alarm circuit on this pressure control?
The SPDT contact allows you to use terminal 2 for the compressor contactor and terminal 1 for a remote alarm or pilot light to signal an oil pressure trip.

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.