- ARI 550
- Air Conditioning and Refrigeration Institute Standard 550-1992: Standard for Centrifugal and Rotary Screw Water-Chilling Packages or ARI Standard 550/590-1998: Standard for Water Chilling Packages Using the Vapor Compression Cycle; standard definitions, nomenclature, proper refrigerant designations, rating and testing of chillers used in comfort cooling applications.
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