Danfoss 060B205066 Pressure Control

The Danfoss 060B205066 is a professional-grade MP54 oil differential pressure control designed to serve as a critical safety switch for refrigeration compressors. This model features a 36-inch capillary tube with a 1/4-inch flare nut, allowing for precise remote mounting and vibration decoupling. Engineered for HCFC and non-flammable HFC refrigerants, it monitors the pressure delta between the oil pump outlet and the crankcase to ensure adequate lubrication. The MP54 utilizes a fixed differential pressure and an integrated thermal time relay with a 45-second delay, preventing nuisance trips during startup while providing low oil pressure protection if lubrication fails during operation. With a sturdy metal enclosure and reliable stainless steel bellows, this lubrication protection switch is a standard replacement for many Carlyle and Copeland compressor configurations, ensuring high-pressure stability and long-term mechanical reliability in demanding commercial HVACR environments.

Key Benefits:

• Enhanced Compressor Safety: Effectively shuts down the system if oil differential pressure drops below the 6 psi factory setting.
• Vibration Resistant Design: The 36" capillary tube minimizes the risk of line fractures caused by compressor harmonics.
• Universal Application: Compatible with all common fluorinated refrigerants and suitable for both AC and DC control voltages.
• Simplified Testing: Includes a manual trip and electrical test function to verify safety circuit integrity without external tools.
• Durable Construction: Features stainless steel bellows and a temperature-compensated time relay for accurate performance from -40°F to 140°F.

Common Questions:

How do you reset the Danfoss MP54 after a trip?
After the cause of the low oil pressure has been identified and corrected, push the manual reset button located on the front of the unit. Note that the thermal relay requires approximately two minutes to cool down before it can be successfully reset.

What is the difference between a fixed and adjustable differential control?
The Danfoss 060B205066 (MP54) has a fixed differential of 6 psi, which is standard for most reciprocating compressors. Adjustable models like the MP55 allow for custom delta settings, but the fixed MP54 is preferred for ensuring consistent factory-spec safety parameters.

Does this unit work with ammonia (R717)?
No, the standard MP54 is designed for fluorinated refrigerants. For ammonia applications, you must use the MP55A series which features specialized materials compatible with R717.

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.