oSIST prEN ISO 22712:2018

Refrigerating systems and heat pumps - Competence of personnel (ISO/DIS 22712:2018)

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/DIS 22712:2018)

Systèmes de réfrigération et pompes à chaleur - Compétence du personnel (ISO/DIS 22712:2018)

Hladilne naprave in toplotne črpalke - Strokovna usposobljenost osebja (ISO/DIS 22712:2018)

General Information

• Status: Not Published
• Public Enquiry End Date: 25-Nov-2018
• ICS: 03.100.30 - Management of human resources
• ICS: 27.080 - Heat pumps
• ICS: 27.200 - Refrigerating technology
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 07-Sep-2022
• Due Date: 26-Oct-2022
• Ref Project: FprEN ISO 22712 - Refrigerating systems and heat pumps - Competence of personnel (ISO/FDIS 22712:2022)

RELATIONS

• Revised: SIST EN 13313:2012 - Refrigerating systems and heat pumps - Competence of personnel
• Effective Date: 15-Jul-2015

Standards Content (sample)

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.

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oSIST prEN ISO 22712:2018
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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
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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

D.1 General ............................................................................................................................................................. 28

Annex E (informative) R 744 (CO ) ........................................................................................................................ 4

E.1 General ................................................................................................................................................................ 4

Annex F (informative) Flammable refrigerants ............................................................................................. 13

F.1 General ............................................................................................................................................................. 13

Bibliography ................................................................................................................................................................. 20

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© ISO 2018

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

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below or ISO’s member body in the country of the requester.
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Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
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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

D.1 General ............................................................................................................................................................. 28

Annex E (informative) R 744 (CO ) ........................................................................................................................ 4

E.1 General ................................................................................................................................................................ 4

Annex F (informative) Flammable refrigerants ............................................................................................. 13

F.1 General ............................................................................................................................................................. 13

Bibliography ................................................................................................................................................................. 20

© ISO 2018 – All rights reserved
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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
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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
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oSIST prEN ISO 22712:2018
ISO/DIS 22712:2018(E)
© ISO 2018 – All rights reserved
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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
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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
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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
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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
level of expertise required to discuss main elements of the skill with others
3.22
working knowledge level
level of expertise required for direct involvement in decisions and actions
3.23
fully operational level
level of expertise required to perform personally the majority of the activities
3.24
leading edge level
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
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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
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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
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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
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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
...