Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers

IEC 60335-2-40:2018 is available as IEC 60335-2-40:2018 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60335-2-40:2018 deals with the safety of electric heat pumps, including sanitary hot water heat pumps, air conditioners, and dehumidifiers incorporating motor-compressors and hydronic fan coils units, their maximum rated voltages being not more than 250 V for single phase appliances and 600 V for all other appliances. Partial units are within the scope of this International Standard.
Appliances not intended for normal household use but which nevertheless may be a source of danger to the public, such as appliances intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard. The appliances referenced above may consist of one or more factory-made assemblies. If provided in more than one assembly, the separate assemblies are to be used together, and the requirements are based on the use of matched assemblies. This standard does not take into account refrigerants other than group A1, A2L, A2 and A3 as defined by ISO 817 classification, A2L refrigerants are limited to those of a molar mass of more than or equal to 42 kg/kmol based on WCF – Worst Case Formulation as specified in ISO 817. This standard specifies particular requirements for the use of flammable refrigerants. Unless specifications are covered by this standard, including the annexes, requirements for refrigerating safety are covered by ISO 5149. Supplementary heaters, or a provision for their separate installation, are within the scope of this standard, but only heaters which are designed as a part of the appliance package, the controls being incorporated in the appliance. For appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary; for appliances subjected to pressure, additional requirements may be necessary; This standard does not apply to: humidifiers intended for use with heating and cooling equipment (IEC 60335-2-88); appliances designed exclusively for industrial processing or appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas). This sixth edition cancels and replaces the fifth edition published in 2013 and its Amendment 1:2016. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- Clause 1 – limiting A2L refrigerants to those of a molar mass of more than or equal to 42 kg/kmol;
- Clause 7 – added requirements for A2L refrigerants,
- Clause 7 – added requirement for pre-charge pipe sets, detection systems, ventilation and the resulting charge;
- Clause 7 – added requirements for UV-C systems;
- Clause 7 – added requirements for transcritical refrigerating systems;
- Subclause 19.7 – amended text to match the intention of the subclause;
- Clause 21 – added requirements for transcritical refrigerating systems;
- Subclause 22 – added requirements for A2L refrigerants;
- Subclause 22– added detection systems;
- Subclause 22 – added new requirements for enhanced tightness refrigerating systems;
- Subclause 22 – added new requirements for UV-C;
- Clause 23 – added new requirements for UV-C;Clause
- Clause 24 – added requirements for transcritical refrigerating systems;
- Subclause 24 – added requirements for detection systems and airflow;
- Clause 32 added new requirements for UV-C;
- Annex BB – revised to add surface temperatures;
- Annex DD – added requirements for A2L refrigerants and amended requirements for flammable refrigerants to exempt A2L refrigerants;
- Annex GG – added requirements for A2L refrigerants;
- Annex GG.1 – amended Table GG.1 and related wording
- Annex GG.7 – added requirement to test;
- Annex GG.8 to GG.1

Appareils électrodomestiques et analogues - Sécurité - Partie 2-40 : Exigences particulières pour les pompes à chaleur électriques, les climatiseurs et les déshumidificateurs

L'IEC 60335-2-40:2018 traite de la sécurité des pompes à chaleur électriques, notamment les pompes à chaleur pour production d'eau chaude sanitaire, les climatiseurs et les déshumidificateurs qui comportent des motocompresseurs et des ventiloconvecteurs hydroniques, dont la tension assignée maximale n'est pas supérieure à 250 V pour les appareils monophasés et à 600 V pour tous les autres appareils. Les unités partielles relèvent du domaine d'application de la présente Norme internationale.
Les appareils non destinés à un usage domestique normal, mais qui néanmoins peuvent constituer une source de danger pour le public, tels que les appareils destinés à être utilisés par des usagers non avertis dans des magasins, chez des artisans et dans des fermes, sont compris dans le domaine d'application de la présente norme.
Les appareils indiqués ci-dessus peuvent consister en un ou plusieurs ensembles fabriqués en usine. Si les appareils sont fournis en plusieurs ensembles, les ensembles doivent être utilisés conjointement et les exigences correspondantes dépendent de l'utilisation des ensembles assortis.
Les exigences relatives à la sécurité des systèmes frigorifiques sont spécifiées dans les normes ISO 5149-1, ISO 5149-2 et ISO 5149-3. En outre, l'IEC 60335-2-21 spécifie les exigences relatives aux cuves destinées au stockage de l'eau chauffée dans les pompes à chaleur pour production d'eau chaude sanitaire.
La présente norme ne couvre pas les fluides frigorigènes qui n'appartiennent pas aux groupes A1, A2L, A2 et A3 de la classification ISO 817. Les fluides frigorigènes A2L se limitent à ceux dont la masse molaire est supérieure ou égale à 42 kg/kmol d'après la formule "la plus défavorable" (WCF, Worst Case Formula) spécifiée dans l'ISO 817.
La présente norme spécifie les exigences particulières pour l'utilisation des fluides frigorigènes inflammables. Sauf spécification contraire dans la présente norme et ses annexes, les exigences relatives à la sécurité des systèmes frigorifiques sont spécifiées dans la série ISO 5149.
Les dispositifs de chauffage supplémentaires (ou les dispositions concernant leur installation) sont couverts par le domaine d'application de la présente norme, mais uniquement les dispositifs de chauffage qui sont conçus en tant que partie de l'appareil, les commandes étant incorporées à l'appareil.
L'attention est attirée sur le fait que:
- pour les appareils destinés à être utilisés dans des véhicules ou à bord de navires ou d'avions, des exigences supplémentaires peuvent être nécessaires;
- pour les appareils à pression, des exigences supplémentaires peuvent être nécessaires;
- dans de nombreux pays, des exigences supplémentaires sont spécifiées par exemple par les organismes nationaux de la santé publique responsables de la protection des travailleurs et par les organismes nationaux responsables du stockage, du transport, de la construction des bâtiments et des installations.
La présente norme ne s'applique pas:
- aux humidificateurs destinés à être utilisés avec des appareils de chauffage et de refroidissement (IEC 60335 2-88);
- aux appareils prévus exclusivement pour des usages industriels;
- aux appareils destinés à être utilisés dans des locaux présentant des conditions particulières, telles que la présence d'une atmosphère corrosive ou explosive (poussière, vapeur ou gaz).
Cette sixième édition annule et remplace la cinquième édition parue en 2013 et son Amendement 1:2016. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
– à l'Article 1, les fluides frigorigènes A2L se limitent à ceux dont la masse molaire est supérieure ou égale à 42 kg/kmol;
– à l'Article 7, des exigences ont été ajoutées pour les fluides frigorigènes A2L;
– à l'Article 7, une exigence a été ajoutée pour les ensembles de tuyaux de précharge, les systèmes de détection, la ventilation et la charge obtenue;
– à l'Art

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Publication Date
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IEC 60335-2-40
Edition 6.0 2018-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-40: Particular requirements for electrical heat pumps, air-conditioners
and dehumidifiers
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-40: Exigences particulières pour les pompes à chaleur électriques,
les climatiseurs et les déshumidificateurs
IEC 60335-2-40:2018-01(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60335-2-40
Edition 6.0 2018-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-40: Particular requirements for electrical heat pumps, air-conditioners
and dehumidifiers
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-40: Exigences particulières pour les pompes à chaleur électriques,
les climatiseurs et les déshumidificateurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 23.120 ISBN 978-2-8322-7980-9

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 60335-2-40:2018  IEC 2018
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 7

1 Scope .............................................................................................................................. 8

2 Normative references ...................................................................................................... 9

3 Terms and definitions .................................................................................................... 10

4 General requirement ...................................................................................................... 16

5 General conditions for the tests ..................................................................................... 16

6 Classification ................................................................................................................. 17

7 Marking and instructions ................................................................................................ 18

8 Protection against access to live parts ........................................................................... 23

9 Starting of motor-operated appliances ........................................................................... 23

10 Power input and current ................................................................................................. 23

11 Heating .......................................................................................................................... 23

12 Void ............................................................................................................................... 29

13 Leakage current and electric strength at operating temperature ..................................... 29

14 Transient overvoltages .................................................................................................. 29

15 Moisture resistance ....................................................................................................... 29

16 Leakage current and electric strength ............................................................................ 30

17 Overload protection of transformers and associated circuits .......................................... 31

18 Endurance ..................................................................................................................... 31

19 Abnormal operation ....................................................................................................... 31

20 Stability and mechanical hazards ................................................................................... 36

21 Mechanical strength ...................................................................................................... 36

22 Construction .................................................................................................................. 36

23 Internal wiring ................................................................................................................ 46

24 Components .................................................................................................................. 46

25 Supply connection and external flexible cords ............................................................... 47

26 Terminals for external conductors .................................................................................. 47

27 Provision for earthing .................................................................................................... 47

28 Screws and connections ................................................................................................ 47

29 Clearances, creepage distances and solid insulation ..................................................... 48

30 Resistance to heat and fire ............................................................................................ 48

31 Resistance to rusting ..................................................................................................... 48

32 Radiation, toxicity and similar hazards ........................................................................... 48

Annexes ............................................................................................................................... 54

Annex D (normative) Thermal motor protectors .................................................................... 54

Annex I (normative) Motors having basic insulation that is inadequate for the rated

voltage of the appliance ........................................................................................................ 54

Annex AA (informative) Examples for operating temperatures of the appliance .................... 55

Annex BB (normative) Selected information about refrigerants ............................................. 56

Annex CC (informative) Transportation, marking and storage for units that employ

flammable refrigerants .......................................................................................................... 58

---------------------- Page: 4 ----------------------
IEC 60335-2-40:2018  IEC 2018 – 3 –

Annex DD (normative) Requirements for operation, service and installation manuals of

appliances using flammable refrigerants ............................................................................... 59

Annex EE (normative) Pressure tests ................................................................................... 68

Annex FF (normative) Leak simulation tests ......................................................................... 71

Annex GG (normative) Charge limits, ventilation requirements and requirements for

secondary circuits ................................................................................................................. 73

Annex HH (informative) Competence of service personnel ................................................... 99

Annex II (Void) .................................................................................................................... 102

Annex JJ (normative) Allowable opening of relays and similar components to prevent

ignition of A2L refrigerants .................................................................................................. 103

Annex KK (normative) Test method for hot surface ignition temperature for A2L ................ 105

Annex LL (normative) Refrigerant detection systems for A2L refrigerants .......................... 109

Annex MM (normative) Refrigerant sensor location confirmation test ................................. 111

Annex NN (normative) Flame arrest enclosure verification test for A2L refrigerants ........... 113

Annex OO (normative) UV radiation conditioning ............................................................... 115

Bibliography ........................................................................................................................ 116

Figure 101 – Example of label for field charged units ............................................................ 50

Figure 102 – Arrangement for heating test of appliances with supplementary heater ............. 52

Figure 103 – Supply circuit for locked-rotor test of a motor of the single-phase type –

Revise as needed for three-phase test .................................................................................. 53

Figure GG.1 – Unventilated area........................................................................................... 95

Figure GG.2 – Mechanical ventilation ................................................................................... 96

Figure GG.3 – Isosceles triangle arrow test gauge ................................................................ 96

Figure GG.4 – Measurement of vibration amplitude............................................................... 96

Figure GG.5 – Relevant heights h , h and h for calculation of A and m ........... 97

inst 0 rel min max

Figure GG.6 – Airflow direction ............................................................................................. 98

Figure KK.1 – Front view of test apparatus labels ............................................................... 105

Figure KK.2 – Test apparatus with dimensions .................................................................... 106

Figure KK.3 – Top view of test apparatus ............................................................................ 107

Table 3 – Temperature limits ................................................................................................ 27

Table 101 – UVC irradiance measurement location ............................................................... 49

Table AA.1 – Examples for operating temperatures of the appliance ..................................... 55

Table BB.1 – Selected information about refrigerants............................................................ 56

Table DD.1 – Mandatory clauses in each manual .................................................................. 59

Table GG.1 – Outline of Annex GG (informative)................................................................... 74

Table GG.2 – Circulation airflow ........................................................................................... 78

Table GG.3 – Appliance with packaging ................................................................................ 83

Table GG.4 – Appliance without packaging ........................................................................... 83

Table GG.5 – Minimum airflow .............................................................................................. 94

---------------------- Page: 5 ----------------------
– 4 – IEC 60335-2-40:2018  IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES – SAFETY –
Part 2-40: Particular requirements for electrical heat pumps,
air-conditioners and dehumidifiers
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

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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

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services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

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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 60335-2-40 has been prepared by subcommittee 61D: Appliances

for air-conditioning for household and similar purposes, of IEC technical committee 61: Safety

of household and similar electrical appliances.
The text of this International Standard is based on the following documents:
FDIS Report on voting
61D/386/FDIS 61D/391/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This sixth edition cancels and replaces the fifth edition published in 2013 and its

Amendment 1:2016. This edition constitutes a technical revision.
---------------------- Page: 6 ----------------------
IEC 60335-2-40:2018  IEC 2018 – 5 –

This edition includes the following significant technical changes with respect to the previous

edition:

– Clause 1 – limiting A2L refrigerants to those of a molar mass of more than or equal to

42 kg/kmol;
– Clause 7 – added requirements for A2L refrigerants,

– Clause 7 – added requirement for pre-charge pipe sets, detection systems, ventilation and

the resulting charge;
– Clause 7 – added requirements for UV-C systems;
– Clause 7 – added requirements for transcritical refrigerating systems;
– Subclause 19.7 – amended text to match the intention of the subclause;
– Clause 21 – added requirements for transcritical refrigerating systems;
– Subclause 22 – added requirements for A2L refrigerants;
– Subclause 22– added detection systems;

– Subclause 22 – added new requirements for enhanced tightness refrigerating systems;

– Subclause 22 – added new requirements for UV-C;
– Clause 23 – added new requirements for UV-C;Clause
– Clause 24 – added requirements for transcritical refrigerating systems;
– Subclause 24 – added requirements for detection systems and airflow;
– Clause 32 added new requirements for UV-C;
– Annex BB – revised to add surface temperatures;

– Annex DD – added requirements for A2L refrigerants and amended requirements for

flammable refrigerants to exempt A2L refrigerants;
– Annex GG – added requirements for A2L refrigerants;
– Annex GG.1 – amended Table GG.1 and related wording
– Annex GG.7 – added requirement to test;
– Annex GG.8 to GG.13 – new coverage for A2L refrigerants;
– Annex HH – revised to take into account A2L refrigerants;

– Annex JJ – new coverage of allowable opening of relays and similar components to

prevent ignition of A2L refrigerants;

– Annex KK – new coverage of test method for hot surface ignition temperature for A2L;

– Annex LL – new coverage of refrigerant detection systems for A2L Refrigerants;
– Annex MM – new coverage of refrigerant sensor location confirmation test;

– Annex NN – new coverage of flame arrest enclosure verification test for A2L refrigerants;

– Annex OO – new coverage of UV radiation conditioning
– Bibliography – added new references.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

This part 2-40 is to be used in conjunction with the latest edition of IEC 60335-1 and its

amendments. It was established on the basis of IEC 60335-1:2010, its Amendment 1:2013

and its Amendment 2:2016.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.

This part 2-40 supplements or modifies the corresponding clauses in IEC 60335-1, so as to

convert that publication into the IEC standard: Safety requirements for electrical heat pumps,

air-conditioners and dehumidifiers.
---------------------- Page: 7 ----------------------
– 6 – IEC 60335-2-40:2018  IEC 2018

When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies

as far as is reasonable. When this standard states "addition", "modification" or "replacement",

the relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:

• subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;

• unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including

those in a replaced clause or subclause;
• additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
• requirements: in roman type;
• test specifications: in italic type;
• notes: in small roman type.

Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and

associated noun are also in bold.
The following differences exist in the countries indicated below:
• 6.1: Class 0I appliances are allowed (Japan).

• 11.8: The temperature of the wooden walls in the test casing is limited to 85 °C (Sweden).

A list of all parts of the IEC 60335 series, under the general title: Household and similar

electrical appliances – Safety, can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document 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.
---------------------- Page: 8 ----------------------
IEC 60335-2-40:2018  IEC 2018 – 7 –
INTRODUCTION

It has been assumed in the drafting of this International Standard that the execution of its

provisions is entrusted to appropriately qualified and experienced persons.

This standard recognizes the internationally accepted level of protection against hazards such

as electrical, mechanical, thermal, fire and radiation of appliances when operated as in

normal use taking into account the instructions. It also covers abnormal situations that can be

expected in practice.

This standard takes into account the requirements of IEC 60364 as far as possible so that

there is compatibility with the wiring rules when the appliance is connected to the supply

mains. However, national wiring rules may differ.

If an appliance within the scope of this standard also incorporates functions that are covered

by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as

far as is reasonable. If applicable, the influence of one function on the other is taken into

account.

When a part 2 standard does not include additional requirements to cover hazards dealt with

in Part 1, Part 1 applies.

NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is

not necessary to specify particular requirements for the appliance in question over and above the general

requirements.

This standard is a product family standard dealing with the safety of appliances and takes

precedence over horizontal and generic standards covering the same subject.

NOTE 2 Horizontal and generic standards covering a hazard are not applicable since they have been taken into

consideration when developing the general and particular requirements for the IEC 60335 series of standards. For

example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as

ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 standards.

An appliance that complies with the text of this standard will not necessarily be considered to

comply with the safety principles of the standard if, when examined and tested, it is found to

have other features that impair the level of safety covered by these requirements.

An appliance employing materials or having forms of construction differing from those detailed

in the requirements of this standard may be examined and tested according to the intent of

the requirements and, if found to be substantially equivalent, may be considered to comply

with the standard.
---------------------- Page: 9 ----------------------
– 8 – IEC 60335-2-40:2018  IEC 2018
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES – SAFETY –
Part 2-40: Particular requirements for electrical heat pumps,
air-conditioners and dehumidifiers
1 Scope
This clause of Part 1 is replaced by the following.

This part of IEC 60335 deals with the safety of electric heat pumps, including sanitary hot

water heat pumps, air conditioners, and dehumidifiers incorporating motor-compressors

and hydronic fan coils units, their maximum rated voltages being not more than 250 V for

single phase appliances and 600 V for all other appliances. Partial units are within the scope

of this International Standard.

Appliances not intended for normal household use but which nevertheless may be a source of

danger to the public, such as appliances intended to be used by laymen in shops, in light

industry and on farms, are within the scope of this standard.

The appliances referenced above may consist of one or more factory-made assemblies. If

provided in more than one assembly, the separate assemblies are to be used together, and

the requirements are based on the use of matched assemblies.

NOTE 101 A definition of ‘motor-compressor’ is given in IEC 60335-2-34, which includes the statement that the

term motor-compressor is used to designate either a hermetic motor-compressor or semi-hermetic motor-

compressor.

NOTE 102 Requirements for refrigerating safety are covered by ISO 5149-1, ISO 5149-2, and ISO 5149-3.

Requirements for containers intended for storage of the heated water included in sanitary hot water heat pumps

are, in addition, covered by IEC 60335-2-21.

This standard does not take into account refrigerants other than group A1, A2L, A2 and A3 as

defined by ISO 817 classification, A2L refrigerants are limited to those of a molar mass of

more than or equal to 42 kg/kmol based on WCF – Wo
...

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