ISO INTERNATIONAL STANDARD 5149-1 First edition 2014-04-15 Refrigerating systems and heat pumps - Safety and environmental requirements Part 1: Definitions, classification and selection criteria Systemes frigorifiques et pompes a chaleur Exigences de sécurité et d'environnement Partie 1: Définitions, classification et criteres de choix Reference number IS0 5149-1:2014(E) ISO CopyrightInternatinal Organization for Standardization @ IS0 2014 ed without license from IHS Not for Resale IS0 5149-1:2014(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2014 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2014 - All rights reserved or networking permited without license from IHS Not for Resale IS0 5149-1:2014(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions .2 3.1 Refrigerating system .2 3.2 Location... 3.3 Pressure 4 3.4 Components of refrigerating system .5 3.5 Piping, joint, and fitting .6 3.6 Safety device ..7 3.7 Fluid. .9 3.8 Heat transfer circuit .10 3.9 Refrigerant disposal .10 3.10 Miscellaneous. .11 4 Abbreviated terms ..11 5 Classification ..12 5.1 Occupancies classification .12 5.2 Systems classification. .12 5.3 Location classification of refrigerating systems. 5.4 Refrigerant classification. .18 6 Quantity of refrigerant per occupied space. .18 7 Space volume calculations .18 8 Heat-transfer fluid .19 8.1 General. 19 8.2 Ingestion .19 8.3 Water and soil contamination .19 8.4 Personal exposure (toxicity) .19 8.5 Pressure. .19 8.6 Marking .19 8.7 Freezing point 19 8.8 Decomposition point .20 8.9 Flash point. 20 8.10 Auto-ignition temperature 20 8.11 Thermal expansion.. 20 8.12 Corrosion protection .20 Annex A (normative) Location of refrigerating systems ..21 Annex B (normative) Safety classification and information about refrigerants ..30 Annex C (informative) Potential hazards for refrigerating systems ..40 Annex D (informative) Equivalent terms in English and French ..42 Bibliography .45 Copyritnteatinal rganiason t? Sanaizal rights reserved ii ded by IHS under lic se with ISt ted without licensefrom IHS Not for Resale