The lubricant compatibility of R11 refrigerant is critical for chiller maintenance. Since R11 is compatible with mineral oil lubricants, it is essential to ensure that the correct type and amount of lubricant are used in the chiller. Incompatible lubricants can lead to premature wear, corrosion, and equipment failure, resulting in increased maintenance costs and downtime. Regular lubricant analysis and maintenance are necessary to ensure the longevity and reliability of R11-based chillers.