IEC 60335-2-40:2022
(Main)Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers
Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers
IEC 60335-2-40:2022 deals with the safety of electric heat pumps, sanitary hot water heat pumps and air conditioners, incorporating motor-compressors as well as hydronic fan coils units, dehumidifiers (with or without motor-compressors), thermoelectric heat pumps and partial units. Their maximum rated voltage being not more than 300 V for single phase appliances and 600 V for multi-phase appliances. Appliances not intended for normal household use but which nevertheless can 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 can consist of one or more factory-made assemblies. If provided in more than one assembly, the separate assemblies are used together, and the requirements are based on the use of matched assemblies. This document does not take into account refrigerants other than group A1, A2L, A2 and A3 as defined by ISO 817. Flammable 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. As far as practical, this document deals with common hazards presented by appliances that are encountered in normal use and assumes that installation, servicing, decommissioning, and disposal are safely handled by competent persons and accidental release of refrigerants is avoided. However, it does not prescribe the criteria to ensure competence of persons during installation, servicing and disposal. Safety requirements during disposal are not specified in this standard. 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. Attention is drawn to the fact that
- for appliances intended to be used in vehicles or on-board ships or aircraft, additional requirements can be necessary;
- in many countries, additional requirements are specified, for example, by the national health authorities responsible for the protection of labour and the national authorities responsible for storage, transportation, building constructions and installations.
This document does not apply to
- humidifiers intended for use with heating and cooling equipment (IEC 60335-2-88);
- appliances designed exclusively for industrial processing;
- 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 seventh edition cancels and replaces the sixth edition published in 2018. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
- Clause 1: added thermoelectric heat pumps to the scope and increased maximum rated voltage to 300 V for single phase appliances;
- Clause 7: revised requirements for marking on the appliance and packaging, including a symbol for minimum floor area and modifying the symbol for flammable refrigerants to include the safety group per ISO 817;
- Clause 11 and Clause 19: restructured for alignment with Part 1 and added requirements for supplementary air heaters;
- Clause 13 and Clause 16: revised requirement for leakage current for stationary class I motor-operated appliances;
- Clause 21: added requirements for particle foam material and revised requirements for transport testing;
- Clause 22: removed limit on the sum of refrigerant charges for appliances with multiple refrigerating systems, and revised requirements for avoiding ignition sources, leak detection systems, safety shut-off valves, and particle foam material;
- Clause 23: added requirements to avoid contact between wires and refrigerant piping;
- Clause 24
The content of the corrigendum 1 (2024-10) has been included in this copy.
Appareils électrodomestiques et analogues - Sécurité - Partie 2-40: Exigences particulières pour les pompes à chaleur électriques, les climatiseurs et les déshumidificateurs
L'IEC 60335-2-40:2022 traite de la sécurité des pompes à chaleur électriques, des pompes à chaleur pour production d'eau chaude sanitaire et des climatiseurs qui comportent des motocompresseurs ainsi que des ventiloconvecteurs hydroniques, des déshumidificateurs (avec ou sans motocompresseur), des pompes à chaleur thermoélectriques et des unités partielles. Leur tension assignée maximale n’est pas supérieure à 300 V pour les appareils monophasés et à 600 V pour les appareils multiphasés. 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. La présente norme ne couvre pas les fluides frigorigènes qui n'appartiennent pas aux groupes A1, A2L, A2 et A3 tels qu'ils sont définis par l’ISO 817. Les fluides frigorigènes inflammables 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 Formulation) spécifiée dans l'ISO 817. Dans la mesure du possible, la présente norme traite des dangers courants engendrés par les appareils qui sont rencontrés dans le cadre d'une utilisation normale et elle suppose que l'installation, l'entretien, la mise hors service et l'élimination sont effectués en toute sécurité par des personnes compétentes et que le dégagement accidentel de fluides frigorigènes est évité. Toutefois, elle ne prescrit pas les critères qui permettent de garantir la compétence des personnes lors de l'installation, de l'entretien et de l'élimination. Les exigences de sécurité pendant l'élimination ne sont pas spécifiées dans la présente norme. 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;
- 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 603352-88);
- 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 septième édition annule et remplace la sixième édition parue en 2018. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- Article 1: ajout des pompes à chaleur thermoélectriques au domaine d'application et augmentation de la tension assignée maximale à 300 V pour les appareils monophasés;
- Article 7: révision des exigences relatives au marquage sur l'appareil et l'emballage, y compris un symbole relatif à la surface au sol minimale, et modification du symbole relatif aux fluides frigorigènes inflammables afin d'inclure le groupe de sécurité selon l’ISO
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IEC 60335-2-40 ®
Edition 7.0 2022-05
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Household and similar electrical appliances – Safety –
Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and
dehumidifiers
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IEC 60335-2-40 ®
Edition 7.0 2022-05
COMMENTED VERSION
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-40: Particular requirements for electrical heat pumps, air-conditioners
and dehumidifiers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 23.120 ISBN 978-2-8322-3458-7
– 2 – IEC 60335-2-40:2022 CMV © IEC 2022
CONTENTS
FOREWORD .5
INTRODUCTION .8
1 Scope .9
2 Normative references . 10
3 Terms and definitions . 12
4 General requirement . 20
5 General conditions for the tests . 20
6 Classification . 21
7 Marking and instructions . 21
8 Protection against access to live parts . 28
9 Starting of motor-operated appliances . 28
10 Power input and current . 28
11 Heating . 29
12 Void . 35
13 Leakage current and electric strength at operating temperature . 35
14 Transient overvoltages . 36
15 Moisture resistance . 36
16 Leakage current and electric strength . 37
17 Overload protection of transformers and associated circuits . 37
18 Endurance . 37
19 Abnormal operation . 37
20 Stability and mechanical hazards . 45
21 Mechanical strength . 45
22 Construction . 46
23 Internal wiring . 60
24 Components . 61
25 Supply connection and external flexible cords . 62
26 Terminals for external conductors . 62
27 Provision for earthing . 62
28 Screws and connections . 62
29 Clearances, creepage distances and solid insulation . 62
30 Resistance to heat and fire . 63
31 Resistance to rusting. 64
32 Radiation, toxicity and similar hazards . 64
Annexes . 73
Annex D (normative) Thermal motor protectors . 73
Annex I (normative) Motors having basic insulation that is inadequate for the rated
voltage of the appliance . 73
Annex AA (informative) Examples for operating temperatures of the appliance . 74
Annex BB (normative) Selected information about refrigerants . 75
Annex CC (informative) Transportation, marking and storage for units that employ
flammable refrigerants . 79
Annex DD (normative) Requirements for operation, service and installation, service,
maintenance and repair, and decommissioning manuals of appliances using flammable
refrigerants . 80
Annex EE (normative) Pressure tests . 92
Annex FF (normative) Leak simulation tests . 95
Annex GG (normative) Charge limits, ventilation requirements and requirements for
secondary circuits . 97
Annex HH (informative) Competence of service personnel . 138
Annex II (Void) . 141
Annex JJ (normative) Allowable openings of relays and similar components to prevent
ignition of A2L refrigerants . 142
Annex KK (normative) Test method for hot surface ignition temperature for A2L . 144
Annex LL (normative) Refrigerant detection systems for A2L flammable refrigerants . 148
Annex MM (normative) Refrigerant sensor location confirmation test. 160
Annex NN (normative) Flame arrest enclosure verification test for A2L refrigerants . 164
Annex OO (normative) UV radiation conditioning (Void) . 166
Annex PP (normative) Leak detection system confirmation test for flammable
refrigerants . 167
Annex QQ (normative) Methods for determining releasable charge . 173
Bibliography . 181
List of comments . 183
Figure 101 – Example of label for field charged units . 66
Figure 102 – Arrangement for heating test of appliances with supplementary air heater . 70
Figure 103 – Supply circuit for locked-rotor test of a motor of the single-phase type –
Revise as needed for three-phase test . 71
Figure 104 – Power spectral density profile for vibration test in 21.101 . 71
Figure 105 – Dimensional details for the weight in the area of the pressure ball . 72
Figure 106 – Measurement before and after the test . 72
Figure GG.1 – Unventilated area . 133
Figure GG.2 – Mechanical ventilation . 134
Figure GG.3 – Isosceles triangle arrow test gauge .
Figure GG.4 – Measurement of vibration amplitude .
Figure GG.53 – Relevant heights h , h and h for calculation of A and m . 136
inst 0 rel min max
Figure GG.64 – Airflow direction . 137
Figure KK.1 – Front view of test apparatus labels . 144
Figure KK.2 – Test apparatus with dimensions . 145
Figure KK.3 – Top view of test apparatus . 146
Figure LL.1 – Example of test chamber design . 155
Table 101 – Power spectral density profile for vibration test . 46
Table 101102 – UVC spectral irradiance measurement location . 65
Table AA.1 – Examples for operating temperatures of the appliance . 74
Table BB.1 – Selected information about refrigerants . 75
Table DD.1 – Mandatory clauses in each manual . 80
– 4 – IEC 60335-2-40:2022 CMV © IEC 2022
Table GG.1 – Outline of Annex GG (informative) . 97
Table GG.2 – Circulation airflow . 104
Table GG.3 – Appliance with packaging . 112
Table GG.4 – Appliance without packaging . 112
Table GG.5 – Minimum airflow air velocity . 128
Table GG.6 – Refrigerant leak rate (ṁ ) . 131
leak
Table LL.1 – Relationship among alarm set point, tolerance and test gas (informative) . 151
Table LL.2 – Gas and vapour concentrations . 153
Table LL.3 – Example of the test chamber design . 156
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 Internatio
...
IEC 60335-2-40 EXV ®
Edition 7.0 2022-09
EXTENDED VERSION
INTERNATIONAL
STANDARD
colour
inside
This extended version of IEC 60335-2-40:2022 includes the content of the references made to
IEC 60335-1:2010+AMD1:2013+AMD2:2016 CSV
Household and similar electrical appliances – Safety –
Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and
dehumidifiers
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
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3, rue de Varembé info@iec.ch
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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 corrigendum or an amendment might have been published.
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IEC 60335-2-40 EXV ®
Edition 7.0 2022-09
EXTENDED VERSION
INTERNATIONAL
STANDARD
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inside
This extended version of IEC 60335-2-40 includes the content of the references made to
IEC 60335-1:2010+AMD1:2013+AMD2:2016 CSV
Household and similar electrical appliances – Safety –
Part 2-40: Particular requirements for electrical heat pumps, air-conditioners
and dehumidifiers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 23.120 ISBN 978-2-8322-5674-9
IEC 60335-1:2010/AMD2:2016/ – 1 –
ISH1:2020 IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
IEC 60335-1
Edition 5.0 2010-05
Amendment 2: 2016-05
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES – SAFETY –
Part 1: General requirements
INT ERPRET AT ION SHEET 1
This interpretation sheet has been prepared by IEC technical committee 61: Safety of
household and similar electrical appliances.
The text of this interpretation sheet is based on the following documents:
DISH Report on voting
61/5999/DISH 61/6009/RVDISH
Full information on the voting for the approval of this interpretation sheet can be found in the
report on voting indicated in the above table.
___________
TC 61 interpretation sheet on: Detachable power supply parts of IEC 60335-1:2010/
AMD2:2016
Introduction
Amendment 2 of IEC 60335-1:2010 defines and introduces requirements for a detachable
power supply part of an appliance. In this amendment, 24.2 prohibits the use of a power
supply in a flexible cord.
QUESTION:
Does Subclause 24.2 prohibit the use of a detachable power supply part?
ANSWER
No, a “detachable power supply part” is a defined term and is not captured by term “power
supply” as used in Subclause 24.2.
ICS 13.120; 97.030
IEC 60335-1:2010-05/AMD2:2016-05/ISH1:2020-04(en-fr)
– 2 – IEC 60335-1:2010/AMD2:2016/
ISH1:2020 IEC 2020
NOTE A detachable power supply part is captured by the defined term when the output of the power supply part is
detachable from the class III construction part of the appliance at:
– the power supply part, or
– the class III construction part of the appliance.
However, the supply cord (if any) does not have to be detachable from the detachable power supply part.
– 2 – IEC 60335-2-40:2022 EXV IEC 2022
CONTENTS
FOREWORD .7
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 12
3 Terms and definitions . 17
4 General requirement . 32
5 General conditions for the tests . 32
6 Classification . 36
7 Marking and instructions . 36
8 Protection against access to live parts . 49
9 Starting of motor-operated appliances . 51
10 Power input and current . 51
11 Heating . 53
12 Void . 60
13 Leakage current and electric strength at operating temperature . 60
14 Transient overvoltages . 62
15 Moisture resistance . 63
16 Leakage current and electric strength . 64
17 Overload protection of transformers and associated circuits . 66
18 Endurance . 66
19 Abnormal operation . 66
20 Stability and mechanical hazards . 80
21 Mechanical strength . 81
22 Construction . 83
23 Internal wiring . 107
24 Components . 109
25 Supply connection and external flexible cords . 114
26 Terminals for external conductors . 122
27 Provision for earthing . 124
28 Screws and connections . 126
29 Clearances, creepage distances and solid insulation . 129
30 Resistance to heat and fire . 137
31 Resistance to rusting. 142
32 Radiation, toxicity and similar hazards . 142
Annex A (informative) Routine tests . 162
Annex B (normative) Appliances powered by rechargeable batteries that are recharged
in the appliance. 164
Annex C (normative) Ageing test on motors . 169
Annex D (normative) Thermal motor protectors . 170
Annex E (normative) Needle-flame test . 171
Annex F (normative) Capacitors. 172
Annex G (normative) Safety isolating transformers . 174
Annex H (normative) Switches . 175
Annex I (normative) Motors having basic insulation that is inadequate for the rated
voltage of the appliance . 177
Annex J (normative) Coated printed circuit boards . 178
Annex K (normative) Overvoltage categories . 179
Annex L (informative) Guidance for the measurement of clearances and creepage
distances . 180
Annex M (normative) Pollution degree . 184
Annex N (normative) Proof tracking test . 185
Annex O (informative) Selection and sequence of the tests of Clause 30 . 186
Annex P (informative) Guidance for the application of this standard to appliances used
in tropical climates . 192
Annex Q (informative) Sequence of tests for the evaluation of electronic circuits . 194
Annex R (normative) Software evaluation. 196
Annex S (normative) Battery-operated appliances powered by batteries that are
non-rechargeable or not recharged in the appliance . 210
Annex T (normative) UV-C radiation effect on non-metallic materials . 213
Annex AA (informative) Examples for operating temperatures of the appliance . 216
Annex CC (informative) Transportation, marking and storage for units that employ
flammable refrigerants . 221
Annex DD (normative) Requirements for installation, service, maintenance and repair,
and decommissioning manuals of appliances using flammable refrigerants . 222
Annex EE (normative) Pressure tests . 231
Annex FF (normative) Leak simulation tests . 233
Annex GG (normative) Charge limits, ventilation requirements and requirements for
secondary circuits . 235
Annex HH (informative) Competence of service personnel . 268
Annex II (Void) . 270
Annex JJ (normative) Allowable openings of relays and similar components to prevent
ignition of A2L refrigerants . 271
Annex KK (normative) Test method for hot surface ignition temperature for A2L . 273
Annex LL (normative) Refrigerant detection systems for flammable refrigerants . 277
Annex MM (normative) Refrigerant sensor location confirmation test. 288
Annex NN (normative) Flame arrest enclosure verification test for A2L refrigerants . 291
Annex OO (Void) . 293
Annex PP (normative) Leak detection system confirmation test for flammable
refrigerants . 294
Annex QQ (normative) Methods for determining releasable charge . 300
...
IEC 60335-2-40 ®
Edition 7.0 2022-05
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
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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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 corrigendum or an amendment might have been published.
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and French, with equivalent terms in 19 additional languages.
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(IEV) online.
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IEC 60335-2-40 ®
Edition 7.0 2022-05
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 978-2-8322-3437-2
– 2 – IEC 60335-2-40:2022 © IEC 2022
CONTENTS
FOREWORD . 5
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 10
3 Terms and definitions . 11
4 General requirement . 19
5 General conditions for the tests . 19
6 Classification . 20
7 Marking and instructions . 20
8 Protection against access to live parts . 26
9 Starting of motor-operated appliances . 26
10 Power input and current . 26
11 Heating . 26
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 . 31
17 Overload protection of transformers and associated circuits . 31
18 Endurance . 31
19 Abnormal operation . 31
20 Stability and mechanical hazards . 38
21 Mechanical strength . 38
22 Construction . 39
23 Internal wiring . 51
24 Components . 51
25 Supply connection and external flexible cords . 52
26 Terminals for external conductors . 53
27 Provision for earthing . 53
28 Screws and connections . 53
29 Clearances, creepage distances and solid insulation . 53
30 Resistance to heat and fire . 53
31 Resistance to rusting . 55
32 Radiation, toxicity and similar hazards . 55
Annexes . 62
Annex D (normative) Thermal motor protectors . 62
Annex I (normative) Motors having basic insulation that is inadequate for the rated
voltage of the appliance . 62
Annex AA (informative) Examples for operating temperatures of the appliance . 63
Annex BB (normative) Selected information about refrigerants . 64
Annex CC (informative) Transportation, marking and storage for units that employ
flammable refrigerants . 68
Annex DD (normative) Requirements for installation, service, maintenance and repair,
and decommissioning manuals of appliances using flammable refrigerants . 69
Annex EE (normative) Pressure tests . 78
Annex FF (normative) Leak simulation tests . 80
Annex GG (normative) Charge limits, ventilation requirements and requirements for
secondary circuits . 82
Annex HH (informative) Competence of service personnel . 115
Annex II (Void) . 117
Annex JJ (normative) Allowable openings of relays and similar components to prevent
ignition of A2L refrigerants . 118
Annex KK (normative) Test method for hot surface ignition temperature for A2L . 120
Annex LL (normative) Refrigerant detection systems for flammable refrigerants . 124
Annex MM (normative) Refrigerant sensor location confirmation test . 135
Annex NN (normative) Flame arrest enclosure verification test for A2L refrigerants . 138
Annex OO (Void) . 140
Annex PP (normative) Leak detection system confirmation test for flammable
refrigerants . 141
Annex QQ (normative) Methods for determining releasable charge . 147
Bibliography . 155
Figure 101 – Example of label for field charged units . 57
Figure 102 – Arrangement for heating test of appliances with supplementary air heater . 59
Figure 103 – Supply circuit for locked-rotor test of a motor of the single-phase type –
Revise as needed for three-phase test . 60
Figure 104 – Power spectral density profile for vibration test in 21.101 . 60
Figure 105 – Dimensional details for the weight in the area of the pressure ball . 60
Figure 106 – Measurement before and after the test . 61
Figure GG.1 – Unventilated area. 112
Figure GG.2 – Mechanical ventilation . 112
Figure GG.3 – Relevant heights h , h and h for calculation of A and m . 113
inst 0 rel min max
Figure GG.4 – Airflow direction .
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