ANSI/ASHRAE 15-2004, Safety Standard for Refrigeration Systems, includes clarifications to the application of safety relief valves for pressure vessels as well as the addition of flammable refrigerant restrictions in comfort cooling applications that were omitted from the 2001 standard. In addition, references utilized in the standard were updated.
The standard includes prohibitions against the use of flammable refrigerants for applications for human comfort. The revision was made to these requirements to correct an omission in the 2001 standard.
Standard 15 was first published in 1919 as Tentative Code for the Regulation of Refrigerating Machines and Refrigerants in recognition of the need for cities and states to enact safety regulations.
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