The Code applies to all refrigeration systems installed, whether in new or existing premises, to systems that undergo a substitution of refrigerant, and to parts that are replaced in or added to the system. The 11th edition of this Standard provides the minimum requirements for the design, construction, installation, inspection, and maintenance of the mechanical refrigeration systems, and is complemented by the practical implementation guidance B52 Handbook, helping to minimize the risk of personal injury. Preface This is the eleventh edition of CSA B52, Mechanical refrigeration code. Systems - Precautions and potential hazardsĪnnex K (informative) - Characteristics of carbonĪnnex L (Informative) - Infrequently used refrigerants:Ĭlassification, quantity, design pressure, and Use of hydrocarbon refrigerants in new equipmentĪnd as drop-in replacements for other classes ofĪnnex J (normative) - Working with R-744 (CO)

4 System selection and application requirementsĪnnex A (informative) - Maximum allowable concentrationĪnnex B (informative) - Guidelines for emergency dischargeĪnnex C (informative) - Worst-case composition ofĪnnex D (informative) - Conversion factorsĪnnex E (informative) - A method for calculating theĭischarge capacity of pressure-relief devices forĪnnex H (normative) - Allowable equivalent length ofĪnnex I (informative) - CSA B52 Information Bulletin on

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