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

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

General Information

Status
Published
Publication Date
24-May-2022
Current Stage
PPUB - Publication issued
Completion Date
25-May-2022
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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
IEC 60335-2-40:2022-05(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
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

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 60335-2-40:2022 © 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

---------------------- Page: 4 ----------------------
IEC 60335-2-40:2022 © IEC 2022 – 3 –

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 ........................................................................................... 114

Figure KK.1 – Front view of test apparatus labels ............................................................... 120

Figure KK.2 – Test apparatus with dimensions .................................................................... 121

Figure KK.3 – Top view of test apparatus ............................................................................ 122

Figure LL.1 – Example of test chamber design .................................................................... 130

Table 101 – Power spectral density profile for vibration test .................................................. 38

Table 102 – UVC spectral irradiance measurement location .................................................. 56

Table AA.1 – Examples for operating temperatures of the appliance ..................................... 63

Table BB.1 – Selected information about refrigerants............................................................ 64

Table DD.1 – Mandatory clauses in each manual .................................................................. 69

Table GG.1 – Outline of Annex GG (informative)................................................................... 83

Table GG.2 – Circulation airflow ........................................................................................... 88

Table GG.3 – Appliance with packaging ................................................................................ 95

---------------------- Page: 5 ----------------------
– 4 – IEC 60335-2-40:2022 © IEC 2022

Table GG.4 – Appliance without packaging ........................................................................... 95

Table GG.5 – Minimum air velocity ..................................................................................... 107

Table GG.6 – Refrigerant leak rate (ṁ ) ......................................................................... 110

leak

Table LL.1 – Relationship among alarm set point, tolerance and test gas (informative) ....... 126

Table LL.2 – Gas and vapour concentrations ...................................................................... 128

Table LL.3 – Example of the test chamber design ............................................................... 131

---------------------- Page: 6 ----------------------
IEC 60335-2-40:2022 © IEC 2022 – 5 –
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 this end and

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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

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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

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

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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

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expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

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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.

IEC 60335 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. It is an International Standard.

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;
---------------------- Page: 7 ----------------------
– 6 – IEC 60335-2-40:2022 © IEC 2022

– 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 – revised requirements for motor-compressors;

– Clause 30 – added requirements for resistance to heat of particle foam material;

– Annex BB – revised Table BB.1 with refrigerant information and added a link to ISO 817

refrigerant data;

– Annex DD – revised requirements for information in the manual for appliances with

flammable refrigerants;
– Annex EE – revised requirements for pressure testing;
– Annex FF – revised requirements for leak simulation tests;
– Annex GG – added requirements for applying releasable charge, added additional

coverage for A2 and A3 refrigerants, including new charge limits for appliances with

circulation airflow and for enhanced tightness refrigerating systems, and revised

requirements for enhanced tightness refrigerating systems using A2L refrigerant;
– Annex LL – revised requirements for refrigerant detection systems;
– Annex MM – revised simulated leak rate;
– Annex OO – deleted annex for conditioning internal wiring using UV light.
– Annex PP – new coverage of leak detection system confirmation test;
– Annex QQ – new coverage of method for determining releasable charge.
The text of this International Standard is based on the following documents:
Draft Report on voting
61D/491/FDIS 61D/493/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/publications.

This part 2-40 is to be used in conjunction with 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.

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.
---------------------- Page: 8 ----------------------
IEC 60335-2-40:2022 © IEC 2022 – 7 –
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 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: 9 ----------------------
– 8 – IEC 60335-2-40:2022 © IEC 2022
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.

Guidance documents concerning the application of the safety requirements for appliances can

be accessed via TC 61 supporting documents on the IEC website
https://www.iec.ch/tc61/supportingdocuments

This information is given for the convenience of users of this International Standard and does

not constitute a replacement for the normative text in this standard.

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 can 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 publications, basic safety publications and group safety publications 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.

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.
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IEC 60335-2-40:2022 © IEC 2022 – 9 –
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, 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 pum

...

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