SIST EN ISO 22712:2023
(Main)Refrigerating systems and heat pumps - Competence of personnel (ISO 22712:2023)
Refrigerating systems and heat pumps - Competence of personnel (ISO 22712:2023)
This European Standard defines the activities related to refrigerating circuits and the associated competence profiles and establishes procedures for assessing the competence of persons who carry out these activities.
NOTE As a refrigerating circuit is considered not to incorporate electrical and electronic systems, activities in this area are not part of this standard. For competences on electrical and electronic systems, it is recommended to refer to national regulations or appropriate European or national standards. This European Standard does not apply to persons carrying out work on self contained refrigerating systems as defined in EN 378-1 from the initial design of the product to the complete manufacture of the product, provided the process is controlled and the methods used are checked by an organisation or individual, responsible for the compliance with statutory requirements on health, safety and environment.
Kälteanlagen und Wärmepumpen - Sachkunde von Personal (ISO 22712:2023)
Dieses Dokument legt die Tätigkeiten in Zusammenhang mit Kühlsystemen nach ISO 5149 1, ISO 5149 2, ISO 5149 3 und ISO 5149 4 und anderen äquivalenten Normen wie EN 378 1, EN 378 2,[4] EN 378 3,[5] EN 378 4[6] und die dazugehörigen Sachkundeprofile fest. Es legt darüber hinaus die Sachkundekriterien für Personen, die diese Tätigkeiten ausführen, fest. Tätigkeiten in Bezug auf Elektrizität sind ausgenommen.
ANMERKUNG 1 Da von einem Kältemittelkreislauf angenommen wird, dass er keine elektrischen und elektronischen Systeme einschließt, sind Tätigkeiten in diesem Bereich kein Bestandteil des vorliegenden Dokuments. Bezüglich der Sachkunde zu elektrischen und elektronischen Systemen können nationale Vorschriften oder entsprechende nationale oder internationale Normen in Bezug genommen werden.
ANMERKUNG 2 Dieses Dokument ist nicht für Personen anwendbar, die Arbeiten an Kältesätzen nach ISO 5149 1 oder EN 378 1 von der Vorplanung des Produkts bis zur kompletten Fertigstellung des Produkts verrichten, sofern der Ablauf von einer Organisation oder Einzelperson überwacht wird und die angewendeten Verfahren von dieser überprüft werden, die für das Erfüllen der gesetzlichen Anforderungen an Gesundheit, Sicherheit und Umwelt (z. B. Energieeffizienz) verantwortlich ist.
ANMERKUNG 3 Dieses Dokument stellt kein Schulungsprogramm dar.
Systèmes frigorifiques et pompes à chaleur - Compétence du personnel (ISO 22712:2023)
Le présent document définit les activités liées aux systèmes frigorifiques conformément à l’ISO 5149-1, l’ISO 5149-2, l’ISO 5149-3 et l’ISO 5149-4, et d’autres normes équivalentes, telles que l’EN 378-1, l’EN 378-2, l’EN 378-3, l’EN 378-4 et les profils de compétences associés. Il établit également des critères de compétence pour les personnes qui réalisent ces activités. Les activités liées à l'électricité sont exclues.
NOTE 1 Un circuit frigorifique étant sensé ne pas comporter de systèmes électriques et électroniques, les activités entrant dans ce domaine ne font pas partie du présent document. Les réglementations nationales ou les normes internationales ou nationales appropriées peuvent être consultées pour les compétences relatives aux systèmes électriques et électroniques.
NOTE 2 Le présent document ne s'applique pas aux personnes employées par des entreprises de fabrication de composants ou équipements frigorifiques autonomes ou monoblocs tels que définis dans l’ISO 5149-1 ou l’EN 378‑1, depuis la conception initiale du produit jusqu'à la fabrication complète du produit, à condition que le processus soit contrôlé et que les méthodes utilisées soient vérifiées par un organisme ou une personne, responsable de la conformité aux exigences légales en matière de santé, de sécurité et d'environnement (par exemple, l'efficacité énergétique).
NOTE 3 Le présent document ne constitue pas un programme de formation.
Hladilne naprave in toplotne črpalke - Strokovna usposobljenost osebja (ISO 22712:2023)
Ta evropski standard opredeljuje dejavnosti, povezane s hladilnimi tokokrogi, in povezane profile usposobljenosti ter vzpostavlja postopke za oceno usposobljenosti oseb, ki izvajajo te dejavnost.
OPOMBA: Ker hladilni tokokrog ne spada med vgrajene električne in elektronske sisteme, dejavnosti s tega področja niso del tega standarda. Za usposobljenost glede električnih in elektronskih sistemov se priporoča vpogled v nacionalne predpise oziroma ustrezne evropske oziroma nacionalne standarde. Ta evropski standard se ne uporablja za osebe, ki izvajajo delo na samozadrževalnih hladilnih sistemih, kot je opredeljeno v standardu EN 378-1 od začetne zasnove izdelka do končne proizvodnje izdelka pod pogojem, da je postopek nadzorovan in uporabljene metode preverja organizacija ali posameznik, ki je odgovoren za zagotavljanje skladnosti z zakonskimi zahtevami na področju zdravja, varnosti in okolja.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 22712:2023
01-junij-2023
Hladilne naprave in toplotne črpalke - Strokovna usposobljenost osebja (ISO
22712:2023)
Refrigerating systems and heat pumps - Competence of personnel (ISO 22712:2023)
Kälteanlagen und Wärmepumpen - Sachkunde von Personal (ISO 22712:2023)
Systèmes frigorifiques et pompes à chaleur - Compétence du personnel (ISO
22712:2023)
Ta slovenski standard je istoveten z: EN ISO 22712:2023
ICS:
03.100.30 Vodenje ljudi Management of human
resources
27.080 Toplotne črpalke Heat pumps
27.200 Hladilna tehnologija Refrigerating technology
SIST EN ISO 22712:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 22712:2023
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SIST EN ISO 22712:2023
EN ISO 22712
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2023
EUROPÄISCHE NORM
ICS 27.080; 27.200 Supersedes EN 13313:2010
English Version
Refrigerating systems and heat pumps - Competence of
personnel (ISO 22712:2023)
Systèmes frigorifiques et pompes à chaleur - Kälteanlagen und Wärmepumpen - Sachkunde von
Compétence du personnel (ISO 22712:2023) Personal (ISO 22712:2023)
This European Standard was approved by CEN on 27 November 2022.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 22712:2023 E
worldwide for CEN national Members.
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SIST EN ISO 22712:2023
EN ISO 22712:2023 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 22712:2023
EN ISO 22712:2023 (E)
European foreword
This document (EN ISO 22712:2023) has been prepared by Technical Committee ISO/TC 86
"Refrigeration and air-conditioning" in collaboration with Technical Committee CEN/TC 182
“Refrigerating systems, safety and environmental requirements” the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by October 2023, and conflicting national standards shall
be withdrawn at the latest by October 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 13313:2010.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 22712:2023 has been approved by CEN as EN ISO 22712:2023 without any modification.
3
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SIST EN ISO 22712:2023
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SIST EN ISO 22712:2023
INTERNATIONAL ISO
STANDARD 22712
First edition
2023-03
Refrigerating systems and heat
pumps — Competence of personnel
Systèmes frigorifiques et pompes à chaleur — Compétence du
personnel
Reference number
ISO 22712:2023(E)
© ISO 2023
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SIST EN ISO 22712:2023
ISO 22712:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
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SIST EN ISO 22712:2023
ISO 22712:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 3
4.1 General . 3
4.2 Competence levels . 3
4.2.1 General . 3
4.2.2 Evaluation procedures . 4
4.2.3 Criteria for the evaluation of competence . 4
Annex A (normative) Criteria for the evaluation of competence . 5
Annex B (informative) Guidelines for the application of this document.12
Annex C (informative) Example of applying assessment schemes for HFC refrigerants
[10]
under Regulation (EU) No 517/2014 .16
Annex D (informative) R 717 (NH ) .18
3
Annex E (informative) R 744 (CO ) .24
2
Annex F (informative) Flammable refrigerants .30
Bibliography .36
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SIST EN ISO 22712:2023
ISO 22712:2023(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, in collaboration
with the European Committee for Standardization (CEN) Technical Committee CEN/TC 182,
Refrigerating systems, safety and environmental requirements, in accordance with the Agreement on
technical cooperation between ISO and CEN (Vienna Agreement).
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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SIST EN ISO 22712:2023
ISO 22712:2023(E)
Introduction
Refrigerating systems, if not properly constructed, installed, operated and maintained, can be of danger
to the health and safety of persons and the safety of property, can be detrimental to the environment
and can increase energy consumption.
It is therefore essential that personnel dealing with such systems have the competence to carry out the
activity, or activities, listed in this document. These activities cover the particular sectors in which they
can potentially operate, from original design to final dismantling and disposal. As job descriptions can
vary from country to country and from company to company, this document specifies the activities
which can be carried out. Job descriptions can specify these activities or a selection of these activities.
This document defines the activities related to the refrigerating circuit.
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SIST EN ISO 22712:2023
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SIST EN ISO 22712:2023
INTERNATIONAL STANDARD ISO 22712:2023(E)
Refrigerating systems and heat pumps — Competence of
personnel
1 Scope
This document defines the activities related to refrigerating systems according to ISO 5149-1,
[4]
ISO 5149-2, ISO 5149-3 and ISO 5149-4 and other equivalent standards, such as EN 378-1, EN 378-2,
[5] [6]
EN 378-3, EN 378-4 and the associated competence profiles. It also establishes the competence
criteria for persons who carry out these activities. Activities concerning electricity are excluded.
NOTE 1 As a refrigerating circuit is considered not to incorporate electrical and electronic systems, activities
in this area are not part of this document. National regulations or appropriate International or national standards
can be referred to for competence on electrical and electronic systems.
NOTE 2 This document does not apply to persons carrying out work on self-contained refrigerating systems
as defined in ISO 5149-1 or EN 378-1, from the initial design of the product to the complete manufacture of the
product, provided the process is controlled and the methods used are checked by an organization or individual
responsible for the conformance with statutory requirements on health, safety and environment (e.g. energy
efficiency).
NOTE 3 This document does not constitute a training programme.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 378-1, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 1:
Basic requirements, definitions, classification and selection criteria
ISO 5149-1, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 1:
Definitions, classification and selection criteria
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5149-1 and EN 378-1 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
assessment
process that evaluates a person's fulfilment of the competence requirements
[SOURCE: ISO/IEC 17024:2012, 3.8, modified — reference to "certification scheme" replaced by
"competence requirements".]
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SIST EN ISO 22712:2023
ISO 22712:2023(E)
3.2
competence
ability to apply knowledge and skills to achieve intended results
[SOURCE: ISO/IEC 17024:2012, 3.6]
3.3
qualification
evidence of a certain level of professional competence
Note 1 to entry: See 4.2.
3.4
designing
collecting all data required for making an effective operating refrigerating circuit, or making the
conceptual and detailed plan of the refrigerating circuit (e.g. dimensioning, calculation, component
selection, refrigerant piping layout and sizing)
3.5
pre‑assembling
fabricating parts and sub-assemblies of a refrigerating circuit in a workshop or on site
Note 1 to entry: This excludes charging with refrigerant.
3.6
installation
assembly of components of a refrigerating system and all the apparatus necessary for its operation
3.7
putting into operation
integrity inspection and setting to work of the refrigerating system for the first time or after significant
changes
Note 1 to entry: This can potentially include charging with refrigerant.
3.8
commissioning
ensuring that the system is performing according to the predefined conditions after putting the system
into operation
Note 1 to entry: "Putting into operation" can potentially include charging with refrigerant.
3.9
operating
running the refrigerating system in a routine manner ensuring that the system works within the
conditions required in the user manual
3.10
in‑service inspection
all activities needed to check if the refrigerating system conforms to predefined requirements (e.g.
functionality, correlation of temperature and pressure, capacity checks, quality checks of joints for
existence of corrosion)
3.11
leak checking
identifying if there is a leak of refrigerant from the refrigerating system and if so, identifying the exact
location of the leak and reporting the results without opening the refrigerating circuit
3.12
general maintenance
keeping or restoring a refrigerating system to a state from which the desired operation can be provided,
without opening the refrigerating circuit
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SIST EN ISO 22712:2023
ISO 22712:2023(E)
3.13
circuit maintenance
keeping or restoring a refrigerating system to a state from which the desired operation can be provided,
by opening the refrigerating circuit
3.14
decommissioning
ensuring that the refrigerating system is in a safe and environmentally proper condition during the
period that it is out of operation
3.15
removal of refrigerant
recovering the refrigerant out of a refrigerating circuit
3.16
dismantling
breaking the refrigerating circuit down into pieces
Note 1 to entry: This excludes removal of refrigerant.
3.17
basic appreciation level
BA
level of expertise required to discuss the main elements of the skill with others
3.18
working knowledge level
WK
level of expertise required for direct involvement in decisions and actions
3.19
fully operational level
FO
level of expertise required to personally perform the majority of the activities concerned
3.20
leading edge level
LE
level of expertise required for significant development of the skill area
4 Requirements
4.1 General
Persons shall be deemed to be qualified if it can be demonstrated that they are capable of carrying out
the activities listed in this document.
4.2 Competence levels
4.2.1 General
Persons shall demonstrate a level of predefined competence as defined in Annex A. A guideline for the
application of this document is set out in Annex B. Examples of applying assessment schemes for HFC
[10]
refrigerants under Regulation (EU) No. 517/2014 are set out in Annex C. Annex D provides guidance
on how to convert the assessment schemes from Annex A to fit into scemes for R 717. Annex E provides
guidance on how to convert the assessment schemes from Annex A to fit into schemes for R 744. An
example of personnel with tasks on a refrigerant circuit containing a flammable refrigerant is given in
Annex F.
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SIST EN ISO 22712:2023
ISO 22712:2023(E)
4.2.2 Evaluation procedures
National regulations define the evaluation procedures dealing with the competence of persons related
to the refrigerating circuit.
NOTE If no national regulation is available, ISO/IEC 17024 can be used to identify appropriate procedures.
4.2.3 Criteria for the evaluation of competence
If criteria for the evaluation of competence are not defined by national regulations, they shall be used
according to Annex A.
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SIST EN ISO 22712:2023
ISO 22712:2023(E)
Annex A
(normative)
Criteria for the evaluation of competence
A.1 General
Annex A provides a general overview of how this document is structured.
This annex consists of six tables, each with an area where knowledge and skills necessary for "the
circuit" are shown. These areas are:
— basic thermodynamics;
— components;
— piping, joints and valves;
— safety equipment;
— fluids;
— communication.
A.2 Areas of assessment
In Tables A.1 to A.6, the horizontal headings provide a description of the various tasks which may be
performed on "the refrigerating system" during the life cycle of "the circuit". The numbers listed
refer to the job defined in Clause 3.
The vertical cells provide a description of the skills to assess in order to determine whether the person
has the competence to perform various tasks well during an assessment.
The cells of each table describe the level of the assessment according to the definitions as given in 3.17,
3.18, 3.19 and 3.20.
The assessment can be carried out by theoretical assessment, which is indicated by the unshaded cells,
or by a practical assessment, which is indicated by the shaded cells. The black cells mean no assessment
is necessary.
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SIST EN ISO 22712:2023
ISO 22712:2023(E)
Table A.1 — Basic thermodynamics
Basic thermodynamics Tasks
Description of tasks
(see Clause 3)
3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16
Knowledge and skills to assess
Know the basic SI or metric
units, for example: temperature, a FO BA BA WK WK WK WK FO BA WK BA WK
pressure, mass, density, energy
Understand basic refrigeration
terms, for example: enthalpy and
entropy, pressure, temperature,
refrigerating capacity, power b FO BA FO FO WK WK WK BA FO BA WK
consumption, energy reduction,
superheating, sub-cooling, liquid
and vapour properties
Know the layout as well as use of
the log p/h diagrams of refriger-
ants and understand triple and c FO BA WK WK WK WK BA BA WK BA BA
critical points and supercritical
area
Know and be able to use the
saturated and superheated
vapour tables of all refrigerants d FO BA WK WK WK WK BA BA BA BA BA
in correlation with the log p/h
diagrams
Draw a scheme of a compression
e FO BA WK WK WK WK BA BA BA BA BA
refrigeration circuit
Understand the meaning of
different kinds of pressures (e.g.
design pressure, absolute and
f FO BA BA WK WK WK WK FO BA FO BA BA
gauge pressure, strength test
pressure, test pressure for leak
detection)
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© ISO 2023 – All rights reserved
Designing
Pre‑assem‑
bling
Installation
Putting into
operation
Commission‑
ing
Operating
In‑service
inspection
Leak checking
General
maintenance
Circuit
maintenance
Decommis‑
sioning
Removing
refrigerant
Dismantling
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SIST EN ISO 22712:2023
ISO 22712:2023(E)
Table A.2 — Components and tests of refrigerating systems
Components and tests of
Tasks
refrigeration systems
Description of tasks
(see Clause 3)
3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16
Knowledge and skills to assess
The person shall be able to under-
stand the functioning of the compo-
nents listed below and, if necessary,
be able to demonstrate the use and
handling of these components
The refrigerating circuit (RAC
a FO BA WK FO FO WK WK BA WK FO WK FO BA
and Heat pump installation)
Compressor (e.g. comparable) b FO BA WK FO FO WK WK BA WK FO WK FO BA
Lubrication system c FO BA WK FO FO WK WK BA WK FO BA BA BA
Capacity control d FO BA WK FO FO WK WK BA WK FO BA BA BA
Pressure vessel e FO BA WK FO FO WK WK BA WK FO WK FO BA
Condenser f FO BA WK FO FO WK WK BA WK FO WK FO BA
Gas cooler g FO BA WK FO FO WK WK BA WK FO WK FO BA
Liquid receiver h FO BA WK FO FO WK WK BA WK FO WK FO BA
Liquid separator i FO BA WK FO FO WK WK BA WK FO WK FO BA
Evaporator j FO BA WK FO FO WK WK BA WK FO WK FO BA
Defrosting systems on evapo-
k FO BA WK FO FO WK WK FO WK FO WK BA BA
rators
Expansion devices l FO WK FO FO FO WK WK FO WK FO FO FO BA
Preassembled units m WK WK FO FO WK WK FO WK FO WK FO
Strength pressure test n FO BA WK FO FO BA BA BA WK WK BA
Tightness pressure test for leak
o FO BA WK FO FO BA BA BA FO WK BA
detection
Removing moisture and p FO WK FO FO FO WK WK WK FO WK FO
non-condensable gases from the
refrigerating circuit by evacua-
tion with vacuum pumps
Vacuum test q FO WK FO FO WK WK WK WK FO WK WK
Determination of required
r LE WK FO FO WK WK WK WK FO WK FO
refrigerant charge
Fill the circuit with refrigerant s FO FO FO WK WK WK WK FO WK WK BA
Check the charge of refrigerant
t BA FO FO WK WK WK WK FO WK WK BA
including leak checking
Understanding of the legislation
and standards applicable in the u FO BA BA BA BA BA BA WK BA BA BA
region of operation
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Designing
Pre‑assem‑
bling
Installation
Putting into
operation
Commission‑
ing
Operating
In‑service
inspection
Leak checking
General
maintenance
Circuit
maintenance
Decommis‑
sioning
Removing
refrigerant
Dismantling
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SIST EN ISO 22712:2023
ISO 22712:2023(E)
Table A.3 — Piping, joints and valves
Piping, joints and valves Tasks
Description of tasks
(see Clause 3)
3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16
Knowledge and skills to assess
The person shall be able to under-
stand the functioning of the compo-
nents listed below and, if necessary,
be able to demonstrate the use and
handling of these components
Piping a FO FO FO WK WK WK WK WK WK FO WK BA FO
Joints b FO FO FO WK WK WK WK WK WK FO WK FO FO
Valves c FO FO FO FO WK WK WK WK WK FO WK FO FO
Thermal insulation d FO FO FO WK WK WK WK WK WK WK WK
Pipe supports e FO FO FO WK WK WK WK WK WK WK WK
Understanding of the legislation
and standards applicable in the f FO BA BA BA BA BA BA BA BA WK BA
region of operation
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© ISO 2023 – All rights reserved
Designing
Pre‑assem‑
bling
Installation
Putting into
operation
Commission‑
ing
Operating
In‑service
inspection
Leak
checking
General
maintenance
Circuit
maintenance
Decommis‑
sioning
Removing
refrigerant
Dismantling
---------------------- Page: 20 ----------------------
SIST EN ISO 22712:2023
ISO 22712:2023(E)
Table A.4 — Safety equipment
Safety equipment Tasks
Description of tasks
(see Clause 3)
3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16
Knowledge and skills to assess
The person shall be able to under-
stand the functioning of the safety
equipment listed below and, if
necessary, demonstrate actions to
control, adjust and check the func-
tion of the safety equipment
Pressure relief device a FO WK WK FO WK WK WK WK WK FO WK WK
Pressure relief valve b FO WK WK FO WK WK WK WK WK FO WK WK
Bursting disc c FO WK WK FO WK WK WK WK WK FO WK WK
Fusible plug d FO WK WK FO WK WK WK WK WK FO WK WK
Temperature-limiting device e FO WK WK FO WK WK WK WK WK FO WK WK
Type-approved temperature
f FO WK WK FO WK WK WK WK WK FO WK WK
limiter
Safety switching device for
g FO WK WK FO WK WK WK WK WK FO WK WK
limiting the pressure
Type-approved pressure limiter h FO WK WK FO WK WK WK WK WK FO WK WK
Type-approved pressure cut out i FO WK WK FO WK WK WK WK WK FO WK WK
Type-approved safety pressure
j FO WK WK FO WK WK WK WK WK FO WK WK
cut out
Changeover device k FO WK WK FO WK WK WK WK WK FO WK WK
Refrigerant detector l FO WK WK FO WK WK WK FO WK FO WK WK
Overflow valve m FO WK WK FO WK WK WK WK WK FO WK WK
Surge protection device n FO WK WK FO WK WK WK WK WK FO WK WK
Liquid level cut out o FO WK WK FO WK WK WK BA WK FO WK WK
Self-closing valve p FO WK WK FO WK WK WK WK WK FO WK WK
Understanding of the legislation
and standards applicable in the q FO BA BA BA BA BA BA BA BA WK BA BA
region of operation
9
© ISO 2023 – All rights reserved
Designing
Pre‑assem‑
bling
Installation
Putting into
operation
Commission‑
ing
Operating
In‑service
inspection
Leak
checking
General
maintenance
Circuit
maintenance
Decommis‑
sioning
Removing
refrigerant
Dismantling
---------------------- Page: 21 ----------------------
SIST EN ISO 22712:2023
ISO 22712:2023(E)
Table A.5 — Fluids
a
Fluids Tasks
Description of tasks
(see Clause 3)
3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16
Knowledge and skills to assess
The person shall be able to under-
stand the aspects listed below and, if
necessary, demonstrate the use and
handling of these aspects
Refrigerant environmental
influences such as ODP, GWP and a FO WK WK FO WK WK WK FO WK FO WK FO WK
a
CO equivalent
2
Safe storage, transport and han-
b WK WK BA BA BA BA WK BA WK
b
dling of refrigerant cylinders
Safe handling in case of leakages
from the refrigerant circuit, c WK WK WK WK WK WK WK WK WK WK WK
including first aid
Coolant, secondary loop fluid d FO BA WK BA BA BA BA BA WK BA WK
Oil e FO BA WK WK WK WK
...
SLOVENSKI STANDARD
oSIST prEN ISO 22712:2018
01-november-2018
+ODGLOQHQDSUDYHLQWRSORWQHþUSDONH6WURNRYQDXVSRVREOMHQRVWRVHEMD ,62',6
Refrigerating systems and heat pumps - Competence of personnel (ISO/DIS
22712:2018)
Kälteanlagen und Wärmepumpen - Sachkunde von Personal (ISO/DIS 22712:2018)
Systèmes de réfrigération et pompes à chaleur - Compétence du personnel (ISO/DIS
22712:2018)
Ta slovenski standard je istoveten z: prEN ISO 22712
ICS:
03.100.30 Vodenje ljudi Management of human
resources
27.080 7RSORWQHþUSDONH Heat pumps
27.200 Hladilna tehnologija Refrigerating technology
oSIST prEN ISO 22712:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 22712:2018
---------------------- Page: 2 ----------------------
oSIST prEN ISO 22712:2018
DRAFT INTERNATIONAL STANDARD
ISO/DIS 22712
ISO/TC 86/SC 1 Secretariat: ANSI
Voting begins on: Voting terminates on:
2018-09-03 2018-11-26
Refrigerating systems and heat pumps — Competence of
personnel
Systèmes de réfrigération et pompes à chaleur — Compétence du personnel
ICS: ISO ics
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 22712:2018(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2018
---------------------- Page: 3 ----------------------
oSIST prEN ISO 22712:2018
ISO/DIS 22712:2017(E)
ISO/DIS 22712:2018(E)
Contents Page
Foreword . iv
Introduction . v
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Requirements . 10
4.1 General . 10
4.2 Competence levels . 11
4.2.1 General . 11
4.2.2 Requirements for evaluation and certification procedures . 11
4.2.3 Requirements for competence assessment methods . 11
Annex A (normative) Competence assessment methods as described in clause 4 . 12
A.1 General . 12
A.2 Areas of assessment . 12
Annex B (normative) Guideline for the application of this standard. 21
B.1 Objective of the guideline . 21
B.2 Background and explanation . 21
B.2.1 Scope . 21
B.2.2 Normative reference to EN ISO/IEC 17024:2012 . 21
B.2.3 Explanation of Annex A . 21
Annex C (informative) HFC refrigerants . 26
C.1 General . 26
C.2 Example for the conversion of EN 13313 in relation with Regulation (EU) No
517/2014 . 26
Annex D (informative) R 717 (NH ) . 28
3
D.1 General . 28
Annex E (informative) R 744 (CO ) . 4
2
E.1 General . 4
Annex F (informative) Flammable refrigerants . 13
F.1 General . 13
Bibliography . 20
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
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
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© ISO 2017 – All rights reserved
iii
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 22712:2018
ISO/DIS 22712:2018(E)
Contents Page
Foreword . iv
Introduction . v
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Requirements . 10
4.1 General . 10
4.2 Competence levels . 11
4.2.1 General . 11
4.2.2 Requirements for evaluation and certification procedures . 11
4.2.3 Requirements for competence assessment methods . 11
Annex A (normative) Competence assessment methods as described in clause 4 . 12
A.1 General . 12
A.2 Areas of assessment . 12
Annex B (normative) Guideline for the application of this standard. 21
B.1 Objective of the guideline . 21
B.2 Background and explanation . 21
B.2.1 Scope . 21
B.2.2 Normative reference to EN ISO/IEC 17024:2012 . 21
B.2.3 Explanation of Annex A . 21
Annex C (informative) HFC refrigerants . 26
C.1 General . 26
C.2 Example for the conversion of EN 13313 in relation with Regulation (EU) No
517/2014 . 26
Annex D (informative) R 717 (NH ) . 28
3
D.1 General . 28
Annex E (informative) R 744 (CO ) . 4
2
E.1 General . 4
Annex F (informative) Flammable refrigerants . 13
F.1 General . 13
Bibliography . 20
© ISO 2018 – All rights reserved
---------------------- Page: 5 ----------------------
oSIST prEN ISO 22712:2018
ISO/DIS 22712:2018(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 on 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 the following URL:
www.iso.org/iso/foreword.html.
ISO 22712 was prepared by ISO Technical Committee TC 86, Refrigeration and air-conditioning,
Subcommittee SC 1, Safety and environmental requirements for refrigerating systems and by Technical
Committee CEN/TC 182, Refrigerating systems, safety and environmental requirements in collaboration
in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
© ISO 2018 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 22712:2018
ISO/DIS 22712:2018(E)
Introduction
Refrigerating systems, if not properly constructed, installed, operated and maintained, can be of danger
to the health and safety of persons, the safety property, be detrimental to the environment and increase
the energy consumption.
It is therefore essential that personnel dealing with such systems are competent to carry out the
activity, or activities, listed in this standard. These activities cover the particular sectors in which they
may operate from original design to final dismantling and disposal. As job descriptions can vary from
country to country and from company to company, this standard specifies the activities to be carried
out. Job descriptions should specify these activities.
This standard defines the activities related to the refrigerating circuit.
© ISO 2018 – All rights reserved
---------------------- Page: 7 ----------------------
oSIST prEN ISO 22712:2018
ISO/DIS 22712:2018(E)
© ISO 2018 – All rights reserved
---------------------- Page: 8 ----------------------
oSIST prEN ISO 22712:2018
ISO/DIS 22712:2018(E)
Refrigerating systems and heat pumps — Competence of
personnel
1 Scope
This International Standard defines the activities related to refrigerating systems according to
EN 378-1, EN 378-2, EN 378-3, EN 378-4 and ISO 5149-1, ISO 5149-2, ISO 5149-3 and ISO 5149-4 and
the associated competence profiles and establishes procedures for assessing the competence of persons
who carry out these activities. Activities with regard to electricity are excluded.
NOTE As a refrigerating circuit is considered not to incorporate electrical and electronic systems, activities in
this area are not part of this standard. For competences on electrical and electronic systems, it is recommended to
refer to national regulations or appropriate European or national standards. This European Standard does not
apply to persons carrying out work on self-contained refrigerating systems as defined in EN 378-1 from the initial
design of the product to the complete manufacture of the product, provided the process is controlled and the
methods used are checked by an organisation or individual, responsible for the compliance with statutory
requirements on health, safety and environment (e.g. energy efficiency).
NOTE The standard is not a training programme .
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 378-1:2016, Refrigerating systems and heat pumps — Safety and environmental requirements — Part
1: Basic requirements, definitions, classification and selection criteria
EN 378-2:, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 2:
Design, construction, testing, marking and documentation
EN 378-3, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 3:
Installation site and personal protection
EN 378-4, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 4:
Operation, maintenance, repair and recovery
EN ISO/IEC 17024, Conformity assessment — General requirements for bodies operating certification of
persons (ISO/IEC 17024:2012)
ISO 5149-1, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 1:
Definitions, classification and selection criteria
ISO 5149-2, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 2:
Design, construction, testing, marking and documentation
ISO 5149-3, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 3:
Installation site
© ISO 2018 – All rights reserved
---------------------- Page: 9 ----------------------
oSIST prEN ISO 22712:2018
ISO/DIS 22712:2018(E)
ISO 5149-4, Refrigerating systems and heat pumps — Safety and environmental requirements — Part 4:
Operation, maintenance, repair and recovery
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 378-1:2016 and the following
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
assessment
process by which the evidence generated, gathered and provided about a person is judged to determine
competence
3.2
assessment body
evaluation body
organisation which is recognised to assess (evaluate) the competence of persons working on
refrigerating circuits
3.3
certification body
organisation which issues/awards certificates proving the competence of persons working on
refrigerating circuits
Note 1 to entry: Depending on national regulations, assessment bodies and certification bodies may be the same
or different organisations.
Note 2 to entry: General criteria for certification bodies can be found in EN ISO/IEC 17024.
3.4
competence
ability to perform safely and satisfactorily the activities within an occupation
3.5
qualification
evidence of a certain level of professional competence
Note 1 to entry: See 4.2.
3.6
certification
procedure used to demonstrate the qualification of personnel at a specified level and leading to the
issue of a certificate
© ISO 2018 – All rights reserved
---------------------- Page: 10 ----------------------
oSIST prEN ISO 22712:2018
ISO/DIS 22712:2018(E)
3.7
certificate
document issued under the rules of the assessment system defined in Annex A indicating that the
named person is competent to deal with applicable health, safety, environmental protection and energy
conservation requirements for refrigerating systems and heat pumps
3.8
designing
collecting all data required for making an effective operating refrigerating circuit, or making the
conceptual and detailed plan of the refrigerating circuit (e.g. dimensioning, calculation, component
selection, refrigerant piping layout and sizing)
3.9
pre-assembling
fabricating parts and sub-assemblies of a refrigerating circuit in a workshop or on site
Note 1 to entry: This excludes charging with refrigerant.
3.10
installation
assembly of components of a refrigerating system and all the apparatus necessary for its operation
3.11
putting into operation
integrity inspection of the refrigerating system and bringing it into work for the first time or after
significant changes
Note 1 to entry: This may include charging with refrigerant.
3.12
commissioning
ensuring that the system is performing according to the predefined conditions after putting the system
into operation
Note 1 to entry: This may include charging with refrigerant.
3.13
operating
running the refrigerating system in a routine manner ensuring that the system works within the
conditions required in the user manual
3.14
in-service inspection
all activities needed to check if the refrigerating system complies to predefined requirements (e.g.
functionality, correlation of temperature and pressure, capacity checks, quality checks of joints for
existence of corrosion)
3.15
leak checking
identifying if there is a leak of refrigerant from the refrigerating system and if yes, identifying the exact
location of the leak and reporting the results without breaking into the circuit
© ISO 2018 – All rights reserved
---------------------- Page: 11 ----------------------
oSIST prEN ISO 22712:2018
ISO/DIS 22712:2018(E)
3.16
general maintenance
keeping or restoring a refrigerating system to a state from which the desired operation can be provided,
without breaking into the refrigerating circuit
3.17
circuit maintenance
keeping or restoring a refrigerating system to a state from which the desired operation can be provided,
by breaking into the refrigerating circuit
3.18
decommissioning
ensuring that the refrigerating system is in a safe and environmentally proper condition during the
period that it is out of operation
3.19
removing of refrigerant
recovering the refrigerant out of a refrigerating circuit
3.20
dismantling
breaking the refrigerating circuit down into pieces
Note 1 to entry: This excludes removing of refrigerant.
3.21
basic appreciation level
BA
level of expertise required to discuss main elements of the skill with others
3.22
working knowledge level
WK
level of expertise required for direct involvement in decisions and actions
3.23
fully operational level
FO
level of expertise required to perform personally the majority of the activities
3.24
leading edge level
LE
level of expertise required for significant development of the skill area
4 Requirements
4.1 General
Persons shall be deemed competent if it can be demonstrated that they are capable of carrying out the
activities listed in this standard.
© ISO 2018 – All rights reserved
---------------------- Page: 12 ----------------------
oSIST prEN ISO 22712:2018
ISO/DIS 22712:2018(E)
4.2 Competence levels
4.2.1 General
Persons shall demonstrate a level of predefined competence as defined in 3.21, 3.22, 3.23, and 3.24, of
their theoretical and/or practical ability as necessary for the activity in question, as set out in Annex A.
4.2.2 Requirements for evaluation and certification procedures
The evaluation and certification procedures dealing with the competence of persons related to the
refrigerating circuit shall be done according to the procedures defined in EN ISO/IEC 17024.
4.2.3 Requirements for competence assessment methods
If competence assessment methods are defined by national regulations, they shall be used.
If competence assessment methods are not defined by national regulations, they shall be used according
to Annex A.
© ISO 2018 – All rights reserved
---------------------- Page: 13 ----------------------
oSIST prEN ISO 22712:2018
ISO/DIS 22712:2018(E)
Annex A
(normative)
Competence assessment methods as described in clause 4
A.1 General
The Annex A is a general overview of how this standard is structured.
This annex consists of six tables, each with an area where knowledge and skills necessary for "the
circuit" these areas are:
Basic thermodynamics;
Components;
Piping, joints and valves;
Safety equipment;
Fluids;
Communication.
A.2 Areas of assessment
Horizontally described the various tasks performed on "the refrigerating system" during the life
cycle of "the circuit". The numbers listed are referring to the job to the definition in clause 3 of the
standard.
Vertical described the skills to assess whether the person is competent to perform task well during an
assessment.
The cells of the table consist the level of the assessment
The definition as given in 3.21, 3.22, 3.23 and 3.24.
The assessment can be done by theoretical assessment this are the unshaded cells, and by a practical
assessment the shaded cells. The black cells mean no assessment is necessary.
© ISO 2018 – All rights reserved
---------------------- Page: 14 ----------------------
oSIST prEN ISO 22712:2018
ISO/DIS 22712:2018(E)
Table A.1 — Basic thermodynamics
Basic thermodynamics Tasks
Description of tasks, see
Clause 3 Terms and
definitions
3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 3.20
Skills to assess
Know the basic SI
units, for example:
a FO BA BA WK WK WK WK FO BA WK BA WK
temperature, pressure,
mass, density, energy
Understand basic
refrigeration terms, for
example: Enthalpy and
Entropy, Pressure,
Temperature,
Refrigerating Capacity, b FO BA FO FO WK WK WK BA FO BA WK
Power consumption,
Energy reduction,
Superheat, Sub-cooling,
Liquid and Vapour
properties
Know the layout as
well as use of the log p-
h-diagrams of
c FO BA WK WK WK WK BA BA BA BA BA
refrigerants and
understand triple point
and supercritical area
Know and use of the
saturated and
superheated vapour
tables of all d FO BA WK WK WK WK BA BA BA BA BA
refrigerants in
correlation with the log
p-h-diagrams as well
Draw a scheme of a
compression e FO BA WK WK WK WK BA BA BA BA BA
refrigeration circuit
Understand the
meaning of different
kind of pressures (e.g.
design pressure,
f FO BA BA WK WK WK WK FO BA FO BA BA
absolute and gauge
pressure, strength test
pressure, test pressure
for leak detection)
© ISO 2018 – All rights reserved
Design
Pre-assembling
Installation
Putting into Operation
Commissioning
Operating
In-service Inspection
Leakage checking
General Maintenance
Circuit Maintenance
Decommissioning
Removing Refrigerant
Dismantling
---------------------- Page: 15 ----------------------
oSIST prEN ISO 22712:2018
ISO/DIS 22712:2018(E)
Table A.2 — Components and tests of refrigerating systems
Components and tests of
Tasks
refrigeration systems
Description of tasks, see
Clause 3 Terms and
definitions
3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 3.20
Skills to assess
the person must carry out
an assessment, be able to
demonstrate use and
handling with taking into
account the charac-
teristics of each subject as
mentioned below
The refrigerating
circuit (RAC and Heat a LE BA WK FO FO WK WK BA WK FO WK FO BA
pump installation)
Compressor (e.g. com-
b FO BA WK FO FO WK WK BA WK FO WK FO BA
parable)
Lubrication system c FO BA WK FO FO WK WK BA WK FO BA BA BA
Capacity control d FO BA WK FO FO WK WK BA WK FO BA BA BA
Pressure vessel e FO BA WK FO FO WK WK BA WK FO WK FO BA
f FO BA WK FO FO WK WK BA WK FO WK FO BA
Condenser
Gas cooler g FO BA WK FO FO WK WK BA WK FO WK FO BA
Liquid receiver h FO BA WK FO FO WK WK BA WK FO WK FO BA
Liquid separator i FO BA WK FO FO WK WK BA WK FO WK FO BA
Evaporator j FO BA WK FO FO WK WK BA WK FO WK FO BA
Defrosting systems on
k FO BA WK FO FO WK WK FO WK FO WK BA BA
evaporators
Expansion devices l FO WK FO FO FO WK WK FO WK FO FO FO BA
Preassembled units m WK WK FO FO WK WK FO WK FO WK FO
Strength pressure test n FO BA WK FO FO BA BA BA BA WK WK BA
Tightness pressure
o FO BA WK FO FO BA BA BA BA FO WK BA
test for leak detection
Removing moisture
and non-condensable
p BA BA WK FO FO BA BA BA BA FO WK BA
gases from the
refrigerating circuit by
© ISO 2018 – All rights reserved
Design
Pre-assembling
Installation
Putting into Operation
Commissioning
Operating
In-service Inspection
Leakage checking
General Maintenance
Circuit Maintenance
Decommis
...
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