Danfoss 060B200791 Pressure Control

The Danfoss 060B200791 MP55 Oil Differential Pressure Control is a critical safety component designed to protect refrigeration compressors against low oil pressure. This dual pressure control utilizes a fixed 120-second thermal time delay relay to prevent nuisance tripping during startup or transient pressure fluctuations. Featuring a 1/4" flare connection, this crankcase pressure switch monitors the differential between the oil pump discharge and the suction pressure. It serves as the direct replacement for 060B200766, ensuring seamless integration into existing HVACR safety circuits. The unit is compatible with HCFC and non-flammable HFC refrigerants, making it a versatile compressor protection switch for commercial applications. Built with a robust bellows system, it provides reliable mechanical switching to interrupt the control circuit if oil differential pressure drops below the set point for the duration of the time delay.

Key Technical Benefits

• Precise Differential Monitoring: Maintains system integrity by ensuring adequate lubrication flows to compressor bearings.
• Thermal Time Delay: The 120-second integrated relay prevents short-cycling and unnecessary shutdowns during oil foaming at startup.
• Direct Retrofit Compatibility: Engineered as the exact replacement for 060B200766, requiring no modification to existing mounting brackets.
• Universal Application: Approved for use with a wide range of standard fluorinated refrigerants in commercial systems.
• Manual Reset Function: Ensures a technician inspects the system for the root cause of oil pressure loss before restarting.

Common Questions

What is the difference between Danfoss 060B200791 and 060B200766?
The 060B200791 is the updated, direct replacement for the discontinued 060B200766 model, maintaining the same 120-second delay and 1/4" flare specifications.

How do I wire the MP55 oil pressure control into a compressor circuit?
The control should be wired so the time delay heater is energized when the compressor starts, with the safety contacts in series with the compressor contactor coil.

Can this pressure control be used with R-410A or R-404A systems?
Yes, this Danfoss MP55 series is compatible with standard non-flammable HFC and HCFC refrigerants used in modern commercial refrigeration.

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.