ISO/DIS 5149-1

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ISO/DIS 5149-1 is a Draft International Standard concerning safety and environmental requirements for refrigerating systems and heat pumps. It defines terms, classifies systems, and outlines selection criteria, focusing on ensuring the safety of people and property, and the protection of the environment. The "DIS" designation indicates that it's a draft version of the standard, subject to further review and revisions before being finalized as an official ISO standard.