IEC 61010-2-011:2016

Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-011: Particular requirements for refrigerating equipment

IEC 61010-2-011:2016 specifies particular safety requirements for the following types a) to c) of electrical equipment and their accessories, wherever they are intended to be used, whenever that equipment incorporates REFRIGERATING SYSTEMS whether an integral part of, or remote to the equipment and the equipment is in direct control of the REFRIGERATING SYSTEM. This Part 2 details all the requirements when up to 150 g of FLAMMABLE REFRIGERANT are used per stage of a REFRIGERATING SYSTEM. Additional requirements beyond the current scope of this standard apply if a refrigerant charge of FLAMMABLE REFRIGERANT exceeds this amount. It has the status of a horizontal standard in accordance with IEC Guide 104.
This publication is to be read in conjunction with IEC 61010-1:2010.

Règles de sécurité pour appareils électriques de mesurage, de régulation et de laboratoire - Partie 2-011: Exigences particulières pour appareils de réfrigération

L'IEC 61010-2-011:2016 spécifie les exigences de sécurité particulières pour les types a) à c) suivants d'appareils électriques et leurs accessoires, quel que soit l'endroit dans lequel ils sont destinés à être utilisés, lorsque ces appareils comportent des SYSTEMES FRIGORIFIQUES, que ces derniers fassent partie intégrante des appareils ou qu'ils soient distants des appareils, et que les appareils sont sous la commande directe du SYSTEME FRIGORIFIQUE. La présente Partie 2 décrit toutes les exigences correspondant à l'utilisation d'une quantité de FLUIDE FRIGORIGENE INFLAMMABLE allant jusqu'à 150 g par étage d'un SYSTEME FRIGORIFIQUE. Lorsqu'une charge de FLUIDE FRIGORIGENE INFLAMMABLE dépasse cette quantité, des exigences supplémentaires hors du domaine d'application de la présente norme s'appliquent. Elle a le statut de norme horizontale conformément au IEC Guide 104.
Cette publication doit être lue conjointement avec la IEC 61010-1:2010

General Information

• Status: Published
• Publication Date: 20-Jul-2016
• ICS: 19.080 - Electrical and electronic testing
• Technical Committee: TC 66 - Safety of measuring, control and laboratory equipment
• Drafting Committee: WG 9 - TC 66/WG 9
• Current Stage: DELPUB - Deleted Publication
• Start Date: 22-Mar-2019
• Completion Date: 31-Jan-2018

Relations

• Revised: IEC 61010-2-011:2019 - Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-011: Particular requirements for refrigerating equipment
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61010-2-011 ®
Edition 1.0 2016-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
Safety requirements for electrical equipment for measurement, control, and
laboratory use –
Part 2-011: Particular requirements for refrigerating equipment

Règles de sécurité pour appareils électriques de mesurage, de régulation et
de laboratoire –
Partie 2-011: Exigences particulières pour appareils de réfrigération

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie

et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished

Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: [e-mail].
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient 20 000 termes et définitions en anglais
Spécifications techniques, Rapports techniques et autres
et en français, ainsi que les termes équivalents dans 15
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.

Recherche de publications IEC - www.iec.ch/searchpub
Glossaire IEC - std.iec.ch/glossary
La recherche avancée permet de trouver des publications IEC 65 000 entrées terminologiques électrotechniques, en anglais
en utilisant différents critères (numéro de référence, texte, et en français, extraites des articles Termes et Définitions des
comité d’études,…). Elle donne aussi des informations sur les publications IEC parues depuis 2002. Plus certaines entrées
projets et les publications remplacées ou retirées. antérieures extraites des publications des CE 37, 77, 86 et

CISPR de l'IEC.
IEC Just Published - webstore.iec.ch/justpublished

Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications IEC. Just
Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur cette
Disponible en ligne et aussi une fois par mois par email. publication ou si vous avez des questions contactez-nous:
[e-mail].
IEC 61010-2-011 ®
Edition 1.0 2016-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ

Safety requirements for electrical equipment for measurement, control, and

laboratory use –
Part 2-011: Particular requirements for refrigerating equipment

Règles de sécurité pour appareils électriques de mesurage, de régulation et

de laboratoire –
Partie 2-011: Exigences particulières pour appareils de réfrigération

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.080 ISBN 978-2-8322-3505-8

– 2 – IEC 61010-2-011:2016 © IEC 2016

CONTENTS
FOREWORD . 4

INTRODUCTION . 6

1 Scope and object . 9

2 Normative references. 10

3 Terms and definitions . 10

4 Tests . 11

5 Marking and documentation . 13

6 Protection against electric shock . 17
7 Protection against mechanical HAZARDS . 17
8 Resistance to mechanical stresses . 17
9 Protection against the spread of fire . 17
10 Equipment temperature limits and resistance to heat . 18
11 Protection against HAZARDS from fluids . 19
12 Protection against radiation, including laser sources, and against sonic and
ultrasonic pressure . 29
13 Protection against liberated gases and substances, explosion and implosion . 29
14 Components and subassemblies . 30
15 Protection by safety interlocks . 30
16 HAZARDS resulting from application. 30
17 RISK assessment . 31
Annexes . 32
Annex G (informative) Leakage and rupture from fluids under pressure . 32
Annex L (informative) Index of defined terms . 32
Annex AA (normative) Non-sparking “n” electrical apparatus . 33
Annex BB (informative) HAZARDS associated with REFRIGERATING SYSTEMS and
refrigerants . 34
Annex CC (informative) Safety requirements for components and piping . 36
Annex DD (informative) Equipment containing FLAMMABLE REFRIGERANTS Information
and marking requirements . 41
Bibliography . 44

Figure 101 – Schema of a REFRIGERATING SYSTEM incorporating a condenser . 7
Figure 102 – Flow chart illustrating the selection process . 8
Figure 103 – Scratching TOOL tip details . 25

Table 1 – Symbols . 15
Table 101 – Maximum temperatures for motor-compressors . 18
Table 102 – Minimum temperature for determination of saturated vapor pressure of
refrigerant. 20
Table 103 – Refrigerant flammability parameters . 28
Table CC.1 – Parameters of pressure vessels according to EN 14276-1 . 36
Table CC.2 – Parameters of pipping according to EN 14276-2 . 38
Table CC.3 – Component and piping requirements . 39

Table CC.4 – Minimum wall thickness for copper and steel tubing . 40

Table DD.1 – Quantity of Group A2/A3 refrigerant per occupied space . 43

– 4 – IEC 61010-2-011:2016 © IEC 2016

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT

FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-011: Particular requirements for REFRIGERATING EQUIPMENT

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 61010-2-011 has been prepared by IEC technical committee 66:
Safety of measuring, control and laboratory equipment.
It has the status of a group safety publication in accordance with IEC Guide 104.
The text of this standard is based on the following documents:
FDIS Report on voting
66/589/FDIS 66/598/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts of the IEC 61010 series, under the general title, Safety requirements for

electrical equipment for measurement, control, and laboratory use, may be found on the IEC

website.
IEC 61010-2-011 is to be used in conjunction with the latest edition of IEC 61010-1. It was

established on the basis of the third edition (2010) of IEC 61010-1.

This Part 2-011 supplements or modifies the corresponding clauses in IEC 61010-1 so as to

convert that publication into the IEC standard: Particular requirements for REFRIGERATING

EQUIPMENT.
Where a particular subclause of Part 1 is not mentioned in this Part 2, that subclause applies
as far as is reasonable. Where this part states “addition”, “modification”, “replacement”, or
“deletion”, the relevant requirement, test specification, or note in Part 1 should be adapted
accordingly.
In this standard:
1) the following print types are used:
– requirements and definitions: in roman type;
– NOTES: in smaller roman type;
– conformity and tests: in italic type;
– terms used throughout this standard which have been defined in Clause 3: SMALL
ROMAN CAPITALS.
2) subclauses, figures, tables and notes which are additional to those in Part 1 are numbered
starting from 101. Additional annexes are lettered starting from AA.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 6 – IEC 61010-2-011:2016 © IEC 2016

INTRODUCTION
This standard, in conjunction with Part 2-010 and Part 2-012, addresses the specific HAZARDS

associated with the heating and cooling of materials by equipment which are segregated as

follows:
IEC 61010-2-010 specifically addresses the HAZARDS associated with equipment

incorporating heating systems.

IEC 61010-2-011 specifically addresses the HAZARDS associated with equipment

incorporating REFRIGERATING SYSTEMS.

IEC 61010-2-012 specifically addresses the HAZARDS associated with equipment
incorporating both heating and REFRIGERATING SYSTEMS that interact
with each other such that the combined heating and cooling system
yield additional or more severe HAZARDS for the two systems than if
treated separately. It also addresses the HAZARDS associated with the
treatment of materials by other factors like irradiation, excessive
humidity, CO and mechanical movement.
Guidance for the application of the correct Part 2 standard(s)
When the equipment includes only a material heating system, and no REFRIGERATING SYSTEM
or other environmental factors apply, then Part 2-010 applies without needing Part 2-011 or
Part 2-012. Similarly, when the equipment includes only a REFRIGERATING SYSTEM, and no
material heating system or other environmental factors apply, then Part 2-011 applies without
needing Part 2-010 or Part 2-012. However, when the equipment incorporates both a material
heating system, and a REFRIGERATING SYSTEM or the materials being treated in the intended
application introduce significant heat into the REFRIGERATING SYSTEM, a determination should
be made whether the interaction between the two systems will generate additional or more
severe HAZARDS than if the systems were evaluated separately (application temperature, see
flow chart for selection process). If the interaction of the heating and cooling functions yields
no additional or more severe HAZARDS then both Part 2-010 and Part 2-011 apply for their
respective functions. Conversely, if additional or more severe HAZARDS results from the
combining of the heating and cooling function, or the equipment incorporates additional
material treatment factors then Part 2-012 applies but not Part 2-010 or Part 2-011.
What HAZARDS are applicable for a REFRIGERATING SYSTEM?
The typical HAZARDS for a REFRIGERATING SYSTEM (see Figure 101) consisting of a motor-

compressor, a condenser, an expansion device and an evaporator include but are not limited
to:
– The excess of temperature of the low-pressure side (return temperature) to the motor-
compressor is higher than admissible. A motor-compressor incorporates a refrigerant
cooled motor and it should be established that the maximum temperatures of low-pressure
side under least favorable condition do not exceed the insulation RATINGS within the motor.
– The excess of pressure of the low-pressure side at the inlet to the motor-compressor is
higher than admissible. The housing of the motor-compressor is exposed to this pressure
and so the design RATING of the motor-compressor housing should accommodate the
worst case pressures whilst providing the correct safety margin for a pressure vessel.
– The excess of temperature of the high-pressure side to the condenser is higher than
admissible. The temperatures of the high-pressure side under the most unfavorable
conditions may present a temperature HAZARD if the OPERATOR is exposed, or an electrical
HAZARD if insulation is degraded.

– The excess of pressure of the high-pressure side to the condenser is higher than

admissible. The refrigerant components downstream of the motor-compressor up to the

expansion device are exposed to this pressure and so the design RATING of these

components should accommodate the worst case pressures whilst providing the correct

safety margin for a pressure vessel.

– The maximum application temperatures, where the heat is being extracted from, may

impact the maximum temperature of the low-pressure side to the motor-compressor as

well as present a temperature HAZARD if the OPERATOR is exposed, or an electrical HAZARD

if insulation is degraded. Whether this application temperature is derived from an integral

heating function of the device or from the heat dissipated from the material being cooled,

the impact under worst case conditions should be evaluated.

– The current draw of the equipment should be established when including the worst case
running conditions of the REFRIGERATING SYSTEM including any defrost cycles that may
apply.
The worst case conditions should be determined for the equipment and will include both the
least favorable NORMAL USE conditions as well as the most unfavorable testing results under
SINGLE FAULT CONDITIONS.
Maximum temperature
and pressure at Condenser
high-pressure side
Motor-
Expansion
compressor
device
Evaporator
Application
under SOAKED
Maximum temperature
TEMPERATURE
and pressure at CONDITIONS
low-pressure side
IEC
Figure 101 – Schema of a REFRIGERATING SYSTEM incorporating a condenser

– 8 – IEC 61010-2-011:2016 © IEC 2016

The selection process is illustrated in the following flow chart (see Figure 102).

Which Part 2 standard applies for equipment

under the scope of IEC 61010 that incorporates

heating and/or cooling?
Additional material treatment factors may
include irradiation, excessive humidity, CO ,
salt mist and chemicals etc.
Does the equipment
YES NO
Part 2-012 applies
incorporate additional material

alone
treatment factors?
YES NO
Does the equipment include a
REFRIGERATING SYSTEM?
Part 2-010 applies
alone
YES NO
Does the equipment include Part 2-011 applies
the heating of materials? alone
The application temperature could
be derived from the resultant heat
of the material being treated or an
integral heating function
Does the application
YES NO
Part 2-012 applies Both Part 2-010 and
temperature adversely impact
alone Part 2-011 apply
the REFRIGERATING SYSTEM?
The equipment shall be evaluated The equipment may take
to ensure the HAZARDS from the measures to reliably mitigate the
application temperature have impact of the application
been mitigated temperature
IEC
Figure 102 – Flow chart illustrating the selection process

SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT

FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-011: Particular requirements for REFRIGERATING EQUIPMENT

1 Scope and object
This clause of Part 1 is applicable, except as follows:
1.1.1 Equipment included in the scope
Replacement:
Replace the first paragraph by the following:
This group safety publication is primarily intended to be used as a product safety standard for
the products mentioned in the scope, but shall also be used by technical committees in the
preparation of their publications for products similar to those mentioned in the scope of this
standard, in accordance with the principles laid down in IEC guide 104 and ISO/IEC Guide 51.
This Part 2 of IEC 61010 specifies particular safety requirements for the following types a) to
c) of electrical equipment and their accessories, wherever they are intended to be used,
whenever that equipment incorporates REFRIGERATING SYSTEMS whether an integral part of, or
remote to the equipment and the equipment is in direct control of the REFRIGERATING SYSTEM.
This Part 2 details all the requirements when up to 150 g of FLAMMABLE REFRIGERANT are used
per stage of a REFRIGERATING SYSTEM. Additional requirements beyond the current scope of
this standard apply if a refrigerant charge of FLAMMABLE REFRIGERANT exceeds this amount.
Addition:
Add the following text after the last paragraph:
NOTE 101 Examples for REFRIGERATING EQUIPMENT include, but are not limited to, laboratory equipment such as
laboratory refrigerators, freezers, refrigerated display cabinets, etc.
If all or part of the equipment falls within the scope of one or more other Part 2 standards of
IEC 61010 as well as within the scope of this standard, it should also meet the requirement of

those other Part 2 standards, In particular, if equipment is intended to be used as a centrifuge,
it should meet the requirements of IEC 61010-2-020. However, when the equipment
incorporates a REFRIGERATING SYSTEM and a heating function where the combination of the
two introduces additional or more sever HAZARDS than if treated separately then the
application of IEC 61010-2-012 should be considered instead of this Part 2.
See further information in the flow chart for the selection process and guidance in the
Introduction.
1.1.2 Equipment excluded from scope
Addition:
Add the following new item after item j):
aa) equipment incorporating transcritical refrigerant system (system that use CO ) or system
) as the refrigerant.
that use ammonia (NH
– 10 – IEC 61010-2-011:2016 © IEC 2016

1.2 Object
1.2.1 Aspects included in scope

Replacement:
Replace the first paragraph by the following:

The object of this Part 2 is to assure that the design and methods of construction of

REFRIGERATING EQUIPMENT provide adequate protection for OPERATORS, bystanders, trained
service personnel, and the surrounding area against the specific HAZARDS that relate to
REFRIGERATING SYSTEMS.
Addition:
Add the following note after the existing note:
NOTE 101 A list of HAZARDS typically associated with REFRIGERATING SYSTEM and refrigerants is included in Annex
BB.
2 Normative references
This clause of Part 1 is applicable, except as follows:
Addition:
Add the following references to the list:
IEC 60079-15:2010, Explosive atmospheres – Part 15: Equipment protection by type of
protection “n”
IEC 60335-2-34:2012, Household and similar electrical appliances – Safety – Part 2-34:
Particular requirements for motor-compressors
IEC 60335-2-34:2012/AMD1:2015
UL 471:2010, Commercial Refrigerators and Freezers
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:

Addition:
Add the following terms and definitions:
3.101
REFRIGERATING EQUIPMENT
test, measurement, control or laboratory equipment that incorporates a REFRIGERATING SYSTEM
either as an integral part of or remote to the equipment
3.102
REFRIGERATING SYSTEM
factory assembled unit for performing part of the refrigerant cycle (compression and
condensation) comprising one or more refrigerant compressors with motors, condensers,
liquid receivers (where required), interconnecting pipe work and ancillary equipment

3.103
FLAMMABLE REFRIGERANT
refrigerant with a flammability classification of group 2 or 3 in accordance with ISO 5149-1

and ISO 817
Note 1 to entry: For refrigerant blends which have more than one flammability classification, either the most
unfavourable classification is taken for the purpose of this definition or the blend itself is evaluated for flammability
in accordance with ISO 817.
3.104
HPCO
HIGH PRESSURE CUT-OUT)
pressure actuated device that is designed to stop the operation of the pressure generator
Note 1 to entry: This note applies to the French language only.
3.105
PS
maximum allowable pressure as determined by the collated test results detailed in 11.7
3.106
SOAKED TEMPERATURE CONDITION
environmental temperature condition when all the temperatures in the equipment under test
(EUT) equal to ±2 °C of the test room ambient
Note 1 to entry: This note applies to the French language only.
3.107
ABNORMAL OPERATION
operation of a REFRIGERATING SYSTEM with a limited RATED ambient temperature range in
ambient temperature conditions outside that limitation but within the temperature limits of
1.4.1
4 Tests
This clause of Part 1 is applicable, except as follows:
4.3 Reference test conditions
4.3.1 Environmental conditions
Addition:
Add the following text after d):
Since the operating temperatures, pressures and current draw for a REFRIGERATING SYSTEM
are significantly impacted by ambient temperatures in a non-linear way, linear extrapolation of
test data is not possible. Therefore tests to establish temperatures, pressures, and current
draw of a REFRIGERATING SYSTEM shall be conducted under the following environmental
conditions:
aa) a temperature of 40 °C;
bb) a relative humidity not exceeding the limits of 1.4.1 d);
If the equipment is RATED by the manufacturer to operate in extended environmental
conditions as defined by 1.4.2 or a more restricted environment condition in accordance with
1.4.1 note 2, then these conditions will define the settings for 4.3.1 aa) or 4.3.1 bb).

– 12 – IEC 61010-2-011:2016 © IEC 2016

When the REFRIGERATING SYSTEM is water cooled, the temperature of the water supply shall be

the maximum as specified by the manufacturer (see 5.4.3) with the worst case water pressure

as specified by the manufacturer.

If a restricted environment condition in accordance with 1.4.1, note 2, is employed then the

test of 4.4.2.101 applies.
4.3.2 State of equipment
4.3.2.1 General
Addition:
Add the following after the first paragraph:
When measuring temperatures, pressures and current draws of equipment incorporating
REFRIGERATING SYSTEM the tests shall be started from a SOAKED TEMPERATURE CONDITION when
all pressures have fully equalized. Tests at the extremes of the input voltage (±10 %) shall
start under these voltage conditions and achieve a stable state but need not start from a
SOAKED TEMPERATURE CONDITION. Safety protective devices shall not operate during this test.
4.4.2 Application of fault conditions
4.4.2.10 Cooling
Replacement:
Replace the text with the following:
For cooling not associated with the cooling of the REFRIGERATING SYSTEM:
a) air-holes with filters shall be closed;
b) forced cooling by motor-driven fans shall be stopped;
c) cooling by circulation of water or other coolant shall be stopped.
For cooling associated with the cooling of the REFRIGERATING SYSTEM:
d) condenser fan stall test – for an air cooled REFRIGERATING SYSTEM
Each condenser fan shall be stalled one at a time unless a single fault could disable all
condenser fans simultaneously. The temperatures and pressures shall be monitored at
short intervals throughout the test for the pressures to ensure that that peak pressures are

captured. This test is conducted at a room ambient of 25 °C ± 3 °C.
e) condenser water failure test – for a water cooled REFRIGERATING SYSTEM
The REFRIGERATING SYSTEM is to be operated with the condensing water shut off and also
with the condensing water restricted until maximum stabilized temperatures are attained or
until representative maximum temperatures are attained under cycling load. The
temperatures and pressures shall be monitored at short intervals throughout the test for
the pressures to ensure that that peak pressures are captured. This test is conducted at a
room ambient of 25 °C ± 3 °C.
f) Condenser fins shall be blocked to simulate clogging with dust etc.
If a manual reset HPCO is relied upon to limit the peak pressure during tests d), e) or f), then it
shall be reset manually within 6 seconds of operation for 10 cycles.
If an automatic reset HPCO is relied upon to limit the peak pressure during tests d), e) or f),
then it shall be permitted to cycle automatically until it can be demonstrated that peak
temperatures and pressures have been achieved.

If it can be demonstrated that an HPCO will operate during tests d), e) or f), the manufacturer

may elect to waive this test, but will set the PS for the high and low side of the motor-

compressor to the rating of the HPCO.

For units with both air-cooled and water-cooled condensers – only one can be faulted at a

time unless the customer is permitted to run either air-cooled or water-cooled (the design

incorporates a redundant cooling option for the condenser).

For a cascade REFRIGERATING SYSTEM, if a heat exchanger from the first stage system acts as

a condenser to the second stage system, then the manufacturer may elect to run each

condenser stage individually under the tests of d), e) or f) accordingly. In this case disabling

the first stage system is considered to simulate the second stage running under a stalled fan
or condenser water failure test.
Addition:
Add the following new subclauses:
ABNORMAL OPERATION)
4.4.2.101 Extreme operating ambient abnormal (
For REFRIGERATING EQUIPMENT intended to operate in a restricted environment and tested in
accordance with 4.3.1 then this additional test of ABNORMAL OPERATION shall apply to simulate
the failure of the controlled environment in the installation.
Having determined the worst case test condition for the temperature and pressure tests under
10.4.1 the unit is run under these conditions until a steady state has been achieved. The test
environment is then increased to the limits from 1.4.1 for Normal environmental conditions
(40 °C, up to 50 % RH) and the unit is allowed to stabilize and the maximum temperatures
and pressures are recorded. The operation of protective devices is permitted during this test.
If steady state conditions are not possible due to the operation of protective devices then the
maximum values recorded for this test shall be either:
– the maximum temperatures and pressures at the point of operation of non-resettable or
manually resettable device. The manually resettable device does not need to be reset
during this test; or
– the maximum temperatures and pressures achieved after the cycling of auto-resetting
protective devices. Cycling shall continue until it is clear that successive cycles will not
develop higher maximum values.
4.4.2.102 Uncontrolled cooling test
Temperature controllers shall be overridden to produce uncontrolled cooling. This applies

whether the controller controls the temperature of the equipment, heat transfer medium or
material being processed.
4.4.3.1 General
Addition:
Add a second new paragraph:
Due to the time it may take to achieve stable conditions for a REFRIGERATING SYSTEM, the
duration of single fault tests may be longer than 4 h unless it is clear that stable conditions
have been maintained for at least 1 h.
5 Marking and documentation
This clause of part 1 is applicable, except as follows:

– 14 – IEC 61010-2-011:2016 © IEC 2016

5.1.2 Identification
Addition:
Add the following new items after the note following item b):

aa) the total mass of refrigerant for each separate refrigerant circuit;

bb) for a single component refrigerant, at least one of the following:

– the chemical name,
– the chemical formula,
– the refrigerant number;
cc) for a blended refrigerant, at least one of the following:
– the chemical name and nominal proportion of each of its components,
– the chemical formula and nominal proportion of each of its components,
– the refrigerant number and nominal proportion of each of its components,
– the refrigerant number of the refrigerant blend;
NOTE 101 Refrigerant numbers are quoted in accordance with ISO 817 or other refrigerant classification standard,
e.g. ANSI/ASHRAE 34.
dd) maximum allowable pressure (PS), high and low sides for each refrigerant stage;
NOTE 102 The collation of the test results that define PS is detailed in 11.7.101.
5.1.3 MAINS supply
Replacement:
Replace the conformity statement as follows:
Conformity is checked by inspection and by measurement of power or input current to check
the marking of 5.1.3 c). The measurement is made with the equipment in the condition of
maximum power consumption, but to exclude any initial inrush current it is not made until the
current has stabilized (usually after 1 min). Transients are ignored. For REFRIGERATING
EQUIPMENT, the impact of extreme ambient temperatures and the interaction of any defrost
mode need to be evaluated in determining the condition of maximum power consumption.
Addition:
Add the following new symbols to Table 1:

Table 1 – Symbols
Number Symbol Reference Description

ISO 7010 – W010 Warning; low temperature/freezing conditions, frostbite
(2011-06) HAZARD (MOD)
ISO 7010 – W021
102 Warning; flammable material

(2011-06)
103 ISO 7010-W011 Warning; slippery surface

104 ISO 7010-W024 Warning; crushing of hands

5.2 Warning markings
Replacement:
Replace the first paragraph with the following:
Warning markings specified in this standard shall meet the following requirements.
Replace a) by the following:
a) the perpendicular height of the triangle for all warning symbols shall be at least 15 mm.
The height of text shall be at least 1,8 mm, depending on the size of the equipment, the
legibility during NORMAL USE and the space available for the symbol. Symbols and text
shall have clear contrast in colour with the background.
Addition:
Add the following new paragraph after the last paragraph (before the conformity statement);
Warning markings or symbol for particular HAZARDS, which exist or develop only when
performing installation or maintenance of the equipment, shall be marked and visible only

when executing this particular maintenance. For example, the marking of the type of
FLAMMABLE REFRIGERANT and of the flammable insulation blowing gas, shall be visible when
gaining access to the motor-compressors, and, in the case of equipment with a remote
refrigerant condensing unit, the pipe connections. The symbol 102 of Table 1 shall be placed
on the nameplate of the unit near the declaration of the refrigerant type and charge
information. It shall be visible after installation of the REFRIGERATING EQUIPMENT.
5.4 Documentation
This clause of Part 1 is applicable, except as follows:
5.4.1 General
Replacement:
Replace item d) by:
– 16 – IEC 61010-2-011:2016 © IEC 2016

d) the information specified in 5.4.2 to 5.4.6, 5.4.101 and 5.4.102;

5.4.3 Equipment Installation
Replacement:
Replace the note with the following text

NOTE 1 It is recommended to add a statement in the documentation for the installation that the safety of any
system incorporating the equipment is the responsibility of the assembler of the system.

NOTE 2 For the US, equipment containing flammable refrigerant is required to have additional instructions – see

informative Annex DD.
5.4.4 Equipment operation
Addition:
Add the following new item after 5.4.4 j):
aa) information to allow safe access during use including identification of trip and slip
HAZARDS (see also 7.3.101 and 16.101).
Addition:
Add the following subclauses:
5.4.101 Additional instructions for equipment with a separate REFRIGERANT
CONDENSING UNIT and intended for connection to a water supply
For equipment with a separate refrigerant condensing unit, the instructions shall include a
statement containing the substance of the following:
The installation of the REFRIGERATING EQUIPMENT and the refrigerant condensing unit shall only
be made by the manufacturer’s service personnel or similarly skilled person.
The information provided with REFRIGERATING EQUIPMENT with a separate REFRIGERANT
CONDENSING UNIT shall include
– information on the type of separate REFRIGERANT CONDENSING UNIT to which the cabinet
shall be connected;
– an electrical diagram showing the electrical terminals for connections.

For equipment intended for connection to a water supply for cooling purposes, the instructions
shall contain information on the maximum permitted temperature and maximum and minimum
pressure of the inlet water consistent with safe operation of the appliance.
5.4.102 Additional instructions for equipment that use FLAMMABLE REFRIGERANT
For equipment that use FLAMMABLE REFRIGERANT, the instructions shall include information
pertaining to the handling, servicing and disposal of the equipment.
The instructions for equipment which use FLAMMABLE REFRIGERANT shall include the substance
of the following warnings as necessary:
– WARNING: Keep all ventilation openings in the enclosure or, in the structure for building-
in, clear of obstruction.
– WARNING: Do not use mechanical devices or other means to accelerate the defrosting
process, other than those recommended by the manufacturer.

– WARNING: Do not damage the refrigerant circuit.

For equipment which use flammable insulation blowing gases, the instructions shall include

information regarding disposal of the equipment.

The instructions for split-systems that use a FLAMMABLE REFRIGERANT shall include the

substance of the following warning:

– WARNING: In order to reduce flammability HAZARDS the installation of this equipment shall

only be carried out by a suitably qualified person.

6 Protection against electric shock
This clause of Part 1 is applicable.
7 Protection against mechanical HAZARDS
This clause of Part 1 is applicable, except as follows:
7.3 Moving parts
This clause of Part 1 is applicable, except as follows:
Addition:
Add the following new subclause:
7.3.101 Door closure/locking mechanisms
For door latching or locking devices with or without self-locking mechanisms, where careless
operation may cause crushing HAZARDS of hand or fingers, the symbol 104 of Table 1 s
...