scope:

This standard specifies the requirements for the safety of persons and property, provides guidance for the protection of the environment and establishes procedures for the operation, maintenance and repair of refrigerating systems and the recovery of refrigerants. The standard applies to: a) refrigerating systems, stationary or mobile, of all sizes including heat pumps; b) secondary cooling or heating systems; c) the location of the refrigerating systems; and d) parts replaced and components added after adoption of this standard if they are not identical in function and in capacity. This standard does not cover "motor vehicle air conditioners". This standard does not apply to goods in storage, with respect to spoilage or contamination. This standard is applicable to new refrigerating systems, extensions or modifications of already existing systems, and for used systems, being transferred to and operated on another site. Deviations are permissible only if equivalent protection is ensured. This standard also applies in the case of the conversion of a system for another refrigerant. This Part 2 of the International Standard is applicable to the design, construction and installation of refrigerating systems including piping, components and materials and including ancillary equipment directly associated with such systems which are not covered in ISO/DIS 5149-1, ISO/DIS 5149-3 or ISO/DIS 5149-4. It also specifies requirements for testing, commissioning, marking and documentation. Requirements for secondary heat transfer circuits are excluded except for any safety devices associated with the refrigerating system.