Provides a basis for uniform requirements for the design, construction and installation of refrigerating systems. It does not apply to the use of water or air as a refrigerant, to household refrigerators or to room air-conditioners, nor to other small refrigerating equipment, including water coolers, containing not more than 2.5 kg of refrigerant. Sections deal with classification of buildings, of refrigerating systems and of refrigerants; installation requirements; design and construction of equipment; erection tests and general instruction. Appendices provide supporting information.