1 Scope

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:

1. 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;

2. secondary cooling or heating systems;

3. the location of the refrigerating systems;

4. 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.