Danfoss 060B200866 Pressure Control

The Danfoss 060B200866 MP54 oil differential pressure control is a critical safety component designed specifically to protect refrigeration compressors from damage caused by low lubricating oil pressure. This MP54 pressure switch functions by monitoring the pressure difference between the oil pump discharge and the compressor crankcase (suction pressure). If this differential pressure drops below the fixed set point during operation or fails to reach it upon start-up, the integrated thermal time relay begins its countdown. If the pressure is not restored within the 45-second release time, the safety circuit de-energizes the compressor. Engineered for HCFC and non-flammable HFC refrigerants, this unit features a 1/4" flare connection and is built with a high-durability stainless steel bellows system for consistent accuracy. The manual reset function ensures that a technician must inspect the lubrication system before restarting, preventing catastrophic mechanical failure. With a 120/240V AC/DC control voltage rating, it is a versatile choice for standard lube oil protection in commercial HVACR applications.

• Fixed Differential Precision: Factory-set at 6.0 psi to eliminate adjustment errors and ensure reliable protection for Carrier/Carlyle and Copeland compressor specifications.
• Universal Compatibility: Optimized for use with common fluorinated refrigerants in deep freeze and air conditioning plants.
• Advanced Reliability: Features stainless steel bellows and a weather-resistant IP20 enclosure for long-term performance in demanding mechanical rooms.
• Simplified Diagnostics: Includes a manual trip-test function that allows for electrical circuit verification without the need for specialized jumper wires.
• Standardized Installation: Equipped with an integral 1/2" NPSM swivel cable connector for direct attachment to male pipe thread conduit.

What is the purpose of the 45-second time delay?
The release time allows the compressor to build up adequate oil pressure during initial start-up or to ride through momentary pressure fluctuations during operation without nuisance tripping.

Can this control be used with Ammonia (R717) systems?
No, the 060B200866 is designed for HCFC and HFC refrigerants. For Ammonia applications, the MP55A series is required.

How do I test the safety circuit without dropping oil pressure?
This Danfoss differential pressure control features a manual test device located under the cover, allowing you to manually activate the time relay to verify the safety cutout 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.