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Engineered for Sustainability

© 2025 Copeland LP. All rights reserved.

HVAC and Refrigeration Oil Controls

In managing refrigeration systems, one of the main concerns is keeping the compressor lubricated while maintaining a high level of heat transfer and energy efficiency by removing as much oil as possible from the refrigerant. To do so requires sophisticated oil management devices. 

Monitor oil levels throughout the refrigeration systems with Copeland's oil control monitors. With our variety of oil management products, you can meet your system's various needs. 


  • Suction accumulators 
  • Oil reservoirs 
  • Mechanical oil level regulators 
  • Oil level control systems 
  • High efficiency centrifugal oil controls 

From the Customer


"The excellent performance of Copeland's air-conditioning solutions, along with their great service team, have been of great help in the research and development and subsequent launch of our TCW products, and have helped us stand out from the competition. At present, many air-conditioning systems using our products have been awarded the energy efficiency badge by the Industrial Technology Research Institute and Taiwan Refrigeration & Air-Conditioning Engineering Association of R.O.C. With more stringent requirements from government regulations and customers, we believe that this product can become the leading product on the market in future, owing to its technical and performance advantages."

Keeping cool at all times
Case Study

As a leading air-conditioner brand in Taiwan, Tatung Company continuously strives to deliver products that are energy-saving, environmentally-friendly and have smart capabilities.

A-WZ Series Oil Separators (1)

A-WZ Series Oil Separators

Used for multiple compressor racks in supermarkets and air conditioning systems for use with HCFCs, HFCs and their lubricants.

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AOR Series Oil Reservoirs

AOR Series Oil Reservoirs

A holding vessel for stand-by oil necessary for the operation of commercial refrigeration systems.

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AOF High Efficiency Oil Filter

AOF High Efficiency Oil Filter

Designed to protect the compressor from dirt and all solid contaminants including metallic magnetic particles.

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AOFD 553 Oil Filter Drier

AOFD 553 Oil Filter Drier

Designed specifically for refrigerant systems that use POE oil.

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OMB Series Oil Management Control

OMB Series Oil Management Control

The OMB is a compressor crankcase oil level protective control. Made ideal for use with Copeland scroll models ZF, ZB, ZR and ZS.

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W-OLC Series Oil Management Control

W-OLC Series Oil Management Control

Controls the oil level in the compressor crankcase with a float operated valve and maintains oil at recommended level.

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Copeland Logo Placeholder

OS Oil Separators

Oil separator series are offered in three different construction styles: Hermetic, Top flange and Bottom flange with support bracket. 

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A-W & A-F

A-W & A-F

The A-W and A-F are used for multiple compressor racks in supermarkets and air conditioning systems. 

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OM3, OM4 and OM5 Trax Oil Electronic Oil Level Control

OM3, OM4 and OM5 Trax Oil Electronic Oil Level Control

A self-contained and reliable electronically controlled system with an integrated solenoid valve that feeds missing oil directly into the compressor sump. 

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OW4, OW5 TraxOil OilWatch

OW4, OW5 TraxOil OilWatch

Designed for systems which require oil level monitoring and alarming.

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LW4, LW5

LW4, LW5

Self-contained units intended for liquid level monitoring sand control at the sight glass connection of vessels.

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