ISO INTERNATIONAL STANDARD 5149-3 First edition 2014-04-15 Refrigerating systems and heat pumps - Safety and environmental requirements Part 3: Installation site Systemes frigorifiques et pompes a chaleur - Exigences de sécurité et d'environnement- Partie 3: Site d'installation Reference number IS0 5149-3:2014(E) ISO @IS02014 No reproo Not for Resale IS0 5149-3:2014(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 [email protected] Web www.iso.org Published in Switzerland @ IS0 2014 - All rights reserved or networking permited without license from IHS Not for Resale IS0 5149-3:2014(E) Contents Page Foreword ..V 1 Scope .1 2 Normative references ..1 3 Terms and definitions ..1 4 Location of refrigerating equipment ..1 4.1 General. 1 4.2 Refrigerating equipment located in the open air 4.3 Refrigerating equipment located in a machinery room 2 4.4 Refrigerating equipment located in the occupied space. 2 4.5 Refrigerating equipment located in unoccupied areas not designated a machinery room.. 2 4.6 Refrigerating equipment located in a ventilated enclosure within an occupied space.. 2 4.7 Piping duct or shaft 2 5 Machinery rooms .2 5.1 Occupancy of machinery rooms and special machinery rooms .2 5.2 Venting from or through the machinery room 3 5.3 Combustion equipment and air compressors. 3 5.4 Openflame .3 5.5 Storage .3 5.6 Remote emergency switch .3 5.7 Exterior openings of the machinery room 3 5.8 Piping and ducting. 4 5.9 Normal lighting. 4 5.10 Emergency lighting. .4 5.11 Dimensions and accessibility .4 5.12 Doors, walls, and ducts. .4 5.13 Ventilation .5 5.14 Machinery rooms for flammable refrigerants (groups A2L, A2, B2L, B2, B3, and A3) ..6 6 Requirements for alternative provisions .7 6.1 General. .7 6.2 Occupied space. .7 6.3 Ventilation. 6.4 Safety shut-off valves .9 Electrical installations. .9 7.1 General requirements 7.2 Main power supply. .10 7.3 Electrical equipment in machinery rooms in which a refrigerating system contains class 2L flammability refrigerants ..10 8 Safety alarms ..10 8.1 General .10 8.2 Alarm system power .10 8.3 Alarm system warning 10 8.4 9 Detectors .11 9.1 General ..11 9.2 Location of detectors .11 9.3 Function of the detector .11 9.4 Type and performance of a detector. 9.5 Installation .12 10 Instruction manuals, notices, and inspections ..12 10.1 Instruction manual. ..12 10.2 Warning notice. .12 ii se with ISt ed without license from IHS Not for Resale