prEN ISO 5149-4
(Main)Refrigerating systems and heat pumps - Safety and environmental requirements - Part 4: Operation, maintenance, repair and recovery (ISO 5149-4:2022)
Refrigerating systems and heat pumps - Safety and environmental requirements - Part 4: Operation, maintenance, repair and recovery (ISO 5149-4:2022)
Scope of ISO 5149-4:2022:
This document specifies requirements for safety and environmental aspects in relation to operation, maintenance and repair of refrigerating systems and the recovery, reuse and disposal of all types of refrigerant, refrigerant oil, heat transfer fluid, refrigerating system and part thereof.
This document does not cover "motor vehicle air conditioners" constructed according to the product standards such as ISO 13043.
These requirements are intended to minimize risks of injury to persons and damage to property and the environment resulting from improper handling of the refrigerants or from contaminants leading to system breakdown and resultant emission of the refrigerant.
Kälteanlagen und Wärmepumpen - Sicherheitstechnische und umweltrelevante Anforderungen - Teil 4: Betrieb, Instandhaltung, Instandsetzung und Rückgewinnung (ISO 5149-4:2022)
Systèmes frigorifiques et pompes à chaleur - Exigences de sécurité et d'environnement - Partie 4: Fonctionnement, maintenance, réparation et récupération (ISO 5149-4:2022)
Hladilni sistemi in toplotne črpalke - Varnostnotehnične in okoljevarstvene zahteve - 4. del: Delovanje, vzdrževanje, popravilo in recikliranje (ISO 5149-4:2022)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2025
Hladilni sistemi in toplotne črpalke - Varnostnotehnične in okoljevarstvene
zahteve - 4. del: Delovanje, vzdrževanje, popravilo in recikliranje (ISO 5149-4:2022)
Refrigerating systems and heat pumps - Safety and environmental requirements - Part 4:
Operation, maintenance, repair and recovery (ISO 5149-4:2022)
Kälteanlagen und Wärmepumpen - Sicherheitstechnische und umweltrelevante
Anforderungen - Teil 4: Betrieb, Instandhaltung, Instandsetzung und Rückgewinnung
(ISO 5149-4:2022)
Systèmes frigorifiques et pompes à chaleur - Exigences de sécurité et d'environnement -
Partie 4: Fonctionnement, maintenance, réparation et récupération (ISO 5149-4:2022)
Ta slovenski standard je istoveten z: prEN ISO 5149-4
ICS:
27.080 Toplotne črpalke Heat pumps
27.200 Hladilna tehnologija Refrigerating technology
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL ISO
STANDARD 5149-4
Second edition
2022-11
Refrigerating systems and heat
pumps — Safety and environmental
requirements —
Part 4:
Operation, maintenance, repair and
recovery
Systèmes frigorifiques et pompes à chaleur — Exigences de sécurité et
d'environnement —
Partie 4: Fonctionnement, maintenance, réparation et récupération
Reference number
ISO 5149-4:2022(E)
ISO 5149-4:2022(E)
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
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CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 5149-4:2022(E)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General requirements . 2
4.1 Operation instructions . 2
4.2 Instruction of operating personnel . 2
4.3 Documentation . 2
5 Maintenance and repair .2
5.1 General . 2
5.2 Maintenance . 3
5.3 Repair. 4
5.4 Change of refrigerant type . 5
5.4.1 General . 5
5.4.2 Planning the change of refrigerant type . 5
5.4.3 Execution of the change of refrigerant type . 5
6 Requirements for recovery, reuse and disposal . 6
6.1 General requirements . 6
6.1.1 Disposal . 6
6.1.2 Personnel . 6
6.1.3 Parts of refrigerating systems . 6
6.1.4 Refrigerants . 6
6.1.5 Handling . 7
6.2 Requirements for recovery and reuse of refrigerant . 7
6.2.1 General . 7
6.2.2 Tests for reuse of refrigerants . 8
6.2.3 Recovery for reuse . 9
6.2.4 Recovery for recycling . . . 9
6.2.5 Reclaim . . 9
6.3 Requirements for disposal . 10
6.3.1 Refrigerant intended for further processing . 10
6.3.2 Refrigerant not intended for further processing . 10
6.3.3 Absorbed R-717 (ammonia) . 10
6.3.4 Refrigerating machine oil . 10
6.3.5 Other components . 10
6.4 Requirements for documentation . 10
6.5 Requirements for refrigerant transfer, transport and storage . 10
6.5.1 General . 10
6.5.2 Refrigerant transfer . 10
6.5.3 Transport .12
6.5.4 Storage .12
6.6 Requirements for recovery equipment .12
6.6.1 General .12
6.6.2 Operation in respect to the environment .12
6.6.3 Performance .13
6.6.4 Operation and maintenance . 13
Annex A (normative) Draining the oil from a refrigerating system .14
Annex B (informative) Guide specification for recycled refrigerant .15
Annex C (informative) Handling and storage of refrigerants .16
Annex D (informative) In-service inspection .21
iii
ISO 5149-4:2022(E)
Annex E (informative) Guidelines for repairs of equipment using flammable refrigerants .24
Bibliography .27
iv
ISO 5149-4:2022(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 86, Refrigeration and air-conditioning,
Subcommittee SC 1, Safety and environmental requirements for refrigerating systems.
This second edition cancels and replaces the first edition (ISO 5149-4:2014), which has been technically
revised.
The main changes are as follows:
— revision of Figure 2;
— addition of guidelines for repairs of equipment using flammable refrigerants in Annex E.
A list of all parts in the ISO 5149 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
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