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ISO 5149-3:2026
Refrigerating systems and heat pumps - Safety and environmental requirements - Part 3: Installation site, classification and selection criteria
This document specifies:
- the classification and selection criteria applicable to refrigerating systems;
- safety requirements for the installation site of refrigerating systems and their ancillary components.
These classification and selection criteria are used in ISO 5149-2 and ISO 5149-4.
This document is applicable to:
- refrigerating systems, stationary or mobile, of all sizes, except vehicle air conditioning systems covered by a specific product standard, e.g. ISO 13043 and SAE J 639;
- secondary cooling or heating systems;
- the location of the refrigerating systems;
- parts replaced and components added after publication of this document if they are not identical in function and in capacity.
This document is applicable:
- to new refrigerating systems, extensions or modifications of already existing systems;
- for used systems, being transferred to and operated on another site;
- in the case of the conversion of a system for another refrigerant.
This document is only applicable to systems containing refrigerants which have a safety group classification and are listed in ISO 817.
International Organization for Standardization [iso]