EN IEC 60335-2-40:2024

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

This European Standard 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.

Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke - Teil 2-40: Besondere Anforderungen für elektrisch betriebene Wärmepumpen, Klimageräte und Raumluft-Entfeuchter

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

Gospodinjski in podobni električni aparati - Varnost - 2-40. del: Posebne zahteve za električne toplotne črpalke, klimatske naprave in razvlažilnike zraka (IEC 60335-2-40:2022)

To točko 1. dela nadomešča naslednje besedilo.
Ta del standarda IEC 60335 obravnava varnost električnih toplotnih črpalk, toplotnih črpalk za gospodinjsko vročo vodo in klimatskih naprav z motornimi kompresorji in ventilatorskimi konvektorji voda/zrak, razvlažilnikov zraka (z motornimi kompresorji ali brez njih), termoelektričnih toplotnih črpalk ter delnih enot. Najvišja nazivna napetost teh aparatov ne sme presegati 300 V za enofazne aparate in 600 V za večfazne aparate.
Področje uporabe tega standarda zajema aparate, ki niso namenjeni za običajno gospodinjsko uporabo, vendar so lahko vir nevarnosti za javnost, kot so aparati, namenjeni za laično uporabo v trgovinah, lahki industriji in na kmetijah.
Navedeni aparati so lahko sestavljeni iz enega ali več tovarniško izdelanih sestavov. Če zajemajo več kot en sestav, se ločeni sestavi uporabljajo skupaj, zahteve pa temeljijo na uporabi združenih sestavov.
OPOMBA 101: Definicija »motornega kompresorja« je podana v standardu IEC 60335-2-34, ki vključuje izjavo, da se izraz motorni kompresor uporablja za označevanje motornega kompresorja hermetičnega ali polhermetičnega tipa.
OPOMBA 102: Zahteve za posode, namenjene za shranjevanje segrete vode, ki so del toplotnih črpalk za gospodinjsko vročo vodo, so zajete v standardu IEC 60335-2-21.
Ta standard ne obravnava hladilnih sredstev, razen tistih iz skupin A1, A2L, A2 in A3, kot so opredeljene v standardu ISO 817. Vnetljiva hladilna sredstva so omejena na tiste z molsko maso 42 kg/kmol ali več na podlagi formulacije v najslabšem primeru (WCF), kot je določeno v standardu ISO 817.
Ta standard v največji možni meri obravnava splošne nevarnosti, ki jih predstavljajo aparati in se pojavljajo pri njihovi običajni uporabi, ter predpostavlja, da namestitev, servisiranje, izločitev iz uporabe in odstranjevanje teh aparatov varno izvajajo kompetentne osebe, da se preprečijo nenamerni izpusti hladilnih sredstev. Vendar standard ne predpisuje meril za zagotavljanje kompetentnosti teh oseb med nameščanjem, servisiranjem in odstranjevanjem. Zahteve glede varnosti med odstranjevanjem niso določene v tem standardu.
OPOMBA 103: Dodatek HH vsebuje informativne zahteve za kompetentnost oseb. Merila za kompetentnost osebja za namene certifikacijskih shem so podana v standardu ISO 227121.
Če specifikacije, vključno z dodatki, v tem standardu niso zajete, so zahteve za varnost v zvezi s hlajenjem zajete v naslednjih standardih:
– ISO 5149-1:2014, ISO 5149-1:2014/AMD1:2015 in ISO 5149-1:2014/AMD2:2021;
– ISO 5149-2:2014 in ISO 5149-2:2014/AMD1:2020;
– ISO 5149-3:2014 in ISO 5149-3:2014/AMD1:2021.
Dodatni grelniki ali ukrepi za njihovo ločeno namestitev spadajo na področje uporabe tega standarda, vendar to velja le za grelnike, ki so zasnovani kot del aparata, pri čemer so krmilni elementi vgrajeni v aparat.
OPOMBA 104: Opozoriti je treba, da:
• so za aparate, ki so namenjeni za uporabo v vozilih ali na krovu ladij ali letal, morda potrebne dodatne zahteve;
• v številnih državah nacionalni zdravstveni organi, odgovorni za varstvo pri delu, ter nacionalni organi, odgovorni za shranjevanje, prevoz, stavbne konstrukcije in vgradnje, določajo dodatne zahteve.
OPOMBA 105: Ta standard se ne uporablja za:
• vlažilnike zraka, namenjene za uporabo z opremo za ogrevanje in hlajenje (IEC 60335-2-88);
• aparate, zasnovane izključno za industrijsko obdelavo;
• aparate, ki so namenjeni za uporabo na lokacijah, kjer veljajo posebne razmere, kot je prisotnost korozivne ali eksplozivne atmosfere (prah, hlapi ali plin).

General Information

• Status: Published
• Publication Date: 07-Nov-2024
• ICS: 23.120 - Ventilators. Fans. Air-conditioners
• Technical Committee: CLC/TC 61 - Safety of household and similar electrical appliances
• Drafting Committee: CLC/TC 61 - Safety of household and similar electrical appliances
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 08-Nov-2024
• Due Date: 08-Mar-2025
• Completion Date: 08-Nov-2024
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: SIST EN IEC 60335-2-40:2025 - Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers (IEC 60335-2-40:2022)

Relations

• Replaces: EN IEC 60335-2-40:2023 - Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers
• Effective Date: 21-Jun-2022
• Replaces: EN IEC 60335-2-40:2023/A11:2023 - Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers
• Effective Date: 21-Jun-2022
• Amended By: EN IEC 60335-2-40:2024/A11:2024 - Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers
• Effective Date: 21-Jun-2022

Overview

EN IEC 60335-2-40:2024 is the CENELEC-adopted European version of IEC 60335-2-40 (2022 + COR1:2024). It defines safety requirements for household and similar electrical appliances - in particular electrical heat pumps, sanitary hot water heat pumps, air‑conditioners and dehumidifiers, including units with motor-compressors, thermoelectric heat pumps and hydronic fan coil units. The standard applies to appliances with rated voltages up to 300 V single‑phase and 600 V multi‑phase, and also covers appliances not intended for normal household use but accessible to the public (shops, light industry, farms).

Key topics and technical requirements

This part 2-40 standard complements the general safety requirements of IEC 60335-1 and addresses appliance‑specific hazards. Major technical topics include:

• Scope and classification - types of covered appliances and voltage limits.
• Marking and instructions - required labels, field‑charged unit labelling and manuals.
• Electrical protection - protection against access to live parts, leakage current and electric strength, transient overvoltages.
• Motors and compressors - starting, locked‑rotor and endurance tests.
• Heating, moisture and mechanical hazards - operating temperature ranges, moisture resistance and mechanical strength.
• Construction and components - internal wiring, terminals, earthing and component requirements.
• Resistance and safety - resistance to heat, fire, rusting, radiation and toxicity.
• Flammable refrigerants & refrigeration safety - detailed normative annexes cover refrigerant selection, charge limits, leak simulation and pressure tests, leak detection systems, flame‑arrest enclosures, releasable charge methods and testing for A2L refrigerants.
• Service, installation & maintenance - mandatory guidance and competency considerations for personnel working on appliances using flammable refrigerants.

(See the standard’s annexes for comprehensive test methods and normative procedures.)

Practical applications

EN IEC 60335-2-40:2024 is used to:

• Guide manufacturers in safe product design, materials selection and labelling for heat pumps, air‑conditioners and dehumidifiers.
• Define type‑testing and routine testing criteria for certification and market access across Europe.
• Support test laboratories and conformity assessment bodies in performing standardized tests (leak simulation, pressure tests, electrical safety).
• Inform installers and service organizations on installation, maintenance and safety procedures-especially for units using flammable refrigerants.
• Help regulators and product safety managers assess compliance with EU/EFTA product safety obligations.

Who should use this standard

• Appliance designers and R&D teams
• Compliance and regulatory affairs professionals
• Test labs and certification bodies
• HVAC manufacturers and OEMs
• Service technicians and installation companies
• National standards bodies and regulators

Related standards

• IEC 60335-1 (General requirements for household appliances) - this standard is read in conjunction with Part 1.
• National adoptions and CENELEC references (EN IEC 60335-2-40:2024/A11:2024) for EU legislation alignment.

Keywords: EN IEC 60335-2-40:2024, safety standard, electrical heat pumps, air-conditioners, dehumidifiers, flammable refrigerants, leak detection, appliance safety, CENELEC.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2025
Nadomešča:
SIST EN IEC 60335-2-40:2023
SIST EN IEC 60335-2-40:2023/A11:2023
Gospodinjski in podobni električni aparati - Varnost - 2-40. del: Posebne zahteve
za električne toplotne črpalke, klimatske naprave in razvlažilnike zraka (IEC 60335-
2-40:2022)
Household and similar electrical appliances - Safety - Part 2-40: Particular requirements
for electrical heat pumps, air-conditioners and dehumidifiers (IEC 60335-2-40:2022)
Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke - Teil 2-40:
Besondere Anforderungen für elektrisch betriebene Wärmepumpen, Klimageräte und
Raumluft-Entfeuchter (IEC 60335-2-40:2022)
Appareils électrodomestiques et analogues - Sécurité - Partie 2-40: Règles particulières
pour les pompes à chaleur électriques, les climatiseurs et les déshumidificateurs (IEC
60335-2-40:2022)
Ta slovenski standard je istoveten z: EN IEC 60335-2-40:2024
ICS:
23.120 Zračniki. Vetrniki. Klimatske Ventilators. Fans. Air-
naprave conditioners
27.080 Toplotne črpalke Heat pumps
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60335-2-40

NORME EUROPÉENNE
EUROPÄISCHE NORM November 2024
ICS 23.120 Supersedes EN IEC 60335-2-40:2023; EN IEC 60335-2-
40:2023/A11:2023
English Version
Household and similar electrical appliances - Safety - Part 2-40:
Particular requirements for electrical heat pumps, air-
conditioners and dehumidifiers
(IEC 60335-2-40:2022 + COR1:2024)
Appareils électrodomestiques et analogues - Sécurité - Sicherheit elektrischer Geräte für den Hausgebrauch und
Partie 2-40: Exigences particulières pour les pompes à ähnliche Zwecke - Teil 2-40: Besondere Anforderungen für
chaleur électriques, les climatiseurs et les elektrisch betriebene Wärmepumpen, Klimageräte und
déshumidificateurs Raumluft-Entfeuchter
(IEC 60335-2-40:2022 + COR1:2024) (IEC 60335-2-40:2022 + COR1:2024)
This European Standard was approved by CENELEC on 2024-08-12. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60335-2-40:2024 E

European foreword
This document (EN IEC 60335-2-40:2024) consists of the text of IEC 60335-2-40:2022 + COR1:2024
prepared by IEC/TC 61 “Safety of household and similar electrical appliances”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2025-08-12
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards (dow) 2027-08-12
conflicting with this document have to be
withdrawn
This document supersedes EN IEC 60335-2-40:2023 and all of its amendments and corrigenda (if
any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN-CENELEC shall not be held responsible for identifying any or all such patent
rights.
This document is read in conjunction with EN IEC 60335-2-40:2024/A11:2024.
This document has been prepared under a standardization request addressed to CENELEC by the
European Commission. The Standing Committee of the EFTA States subsequently approves these
requests for its Member States.
For the relationship with EU Legislation, see informative Annexes ZZA and ZZB, which are an integral
part of EN IEC 60335-2-40:2024/A11:2024.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN and CENELEC
websites.
Endorsement notice
The text of the International Standard IEC 60335-2-40:2022 + COR1:2024 was approved by CEN-
CENELEC as a European Standard without any modification.

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

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

– 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

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
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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;

– 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.

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.

– 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.
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 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.
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 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. 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 standard 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.
NOTE 103 Annex HH provides informative requirements on competence of persons. Criteria for competence of
personnel for the purpose of certification schemes can be found in ISO 22712 .
Unless specifications are covered by this standard, including the annexes, requirements for
refrigerating safety are covered by:
– ISO 5149-1:2014, ISO 5149-1:2014/AMD1:2015, and ISO 5149-1:2014/AMD2:2021,
– ISO 5149-2:2014 and ISO 5149-2:2014/AMD1:2020,
– ISO 5149-3:2014 and ISO 5149-3:2014/AMD1:2021.
___________
Under preparation. Stage at the time of publication: ISO FDIS 22712:2022

– 10 – IEC 60335-2-40:2022 © IEC 2022
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.
NOTE 104 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.
NOTE 105 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;
• 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).
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60068-2-52, Environmental testing – Part 2: Tests – Test Kb: Salt mist, cyclic (sodium,
chloride solution)
IEC 60079-0, Explosive atmospheres – Part 0: Equipment – General requirements
IEC 60079-7:2015, Explosive atmospheres − Part 7: Equipment protection by increased safety
"e"
IEC 60079-7:2015/AMD1:2017
IEC 60079-14:2013, Explosive atmospheres − Part 14: Electrical installations design, selection
and erection
IEC 60079-15:2017, Explosive atmospheres – Part 15: Equipment protection by type of
protection "n"
IEC 60335-2-34:2021, Household and similar electrical appliances – Safety – Part 2-34:
Particular requirements for motor-compressors
IEC 60335-2-51, Household and similar electrical appliances – Safety – Part 2-51: Particular
requirements for stationary circulation pumps for heating and service water installations
IEC 60695-1-10, Fire hazard testing – Part 1-10: Guidance for assessing the fire hazard of
electrotechnical products – General guidelines
IEC 60695-10-2:2014, Fire hazard testing – Part 10-2: Abnormal heat – Ball pressure test
method
IEC 60730-2-6, Automatic electrical controls – Part 2-6: Particular requirements for automatic
electrical pressure sensing controls including mechanical requirements
IEC 62471:2006, Photobiological safety of lamps and lamp systems
ISO 817, Refrigerants – Designation and safety classification

IEC 60335-2-40:2022 © IEC 2022 – 11 –
ISO 527-3, Plastics − Determination of tensile properties − Part 3: Test conditions for films and
sheets
ISO 1302:2002 , Geometrical Product Specifications (GPS) – Indication of surface texture in
technical product documentation
ISO 2578, Plastics – Determination of time-temperature limits after prolonged exposure to heat
ISO 5149-1:2014, Refrigerating systems and heat pumps – Safety and environmental
requirements – Part 1: Definitions, classification and selection criteria
ISO 5149-1:2014/AMD1:2015
ISO 5149-1:2014/AMD2:2021
ISO 5149-2:2014, Refrigerating systems and heat pumps – Safety and environmental
requirements – Part 2: Design, construction, testing, marking and documentation
ISO 5149-2:2014/AMD1:2020
ISO 5149-3:2014, Refrigerating systems and heat pumps – Safety and environmental
requirements – Part 3: Installation site
ISO 5149-3:2014/AMD1:2021
ISO 5151:2017, Non-ducted air conditioners and heat pumps – Testing and rating for
performance
ISO 5151:2017/AMD1:2020
ISO 7010:2019, Graphical symbols – Safety colours and safety signs – Registered safety signs
ISO 13253, Ducted air-conditioners and air-to-air heat pumps – Testing and rating for
performance
ISO 13256 (all parts), Water-source heat pumps – Testing and rating for performance
ISO 13355:2016, Packaging − Complete, filled transport packages and unit loads − Vertical
random vibration test
ISO 14903, Refrigerating systems and heat pumps – Qualification of tightness of components
and joints
ISO 15042, Multiple split-system air-conditioners and air-to-air heat pumps – Testing and rating
for performance
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1.4 Addition:
Note 101 to entry: If the appliance comprises electrical accessories, including fans, the rated power input is based
upon the total maximum electrical power input with all accessories energized, when operating continuously under
the appropriate environmental conditions. If the heat pump can be operated in the heating or cooling mode, the
rated power input is based upon the input in the heating or in the cooling mode, whichever is the greater.
___________
Withdrawn.
– 12 – IEC 60335-2-40:2022 © IEC 2022
3.1.9 Replacement:
normal operation
conditions that apply when the appliance is mounted or installed as in normal use and is
operating under the most severe operating conditions specified by the manufacturer
3.5.4 Addition:
Note 101 to entry: Appliances connected to water pipes or refrigerant pipes that are secured to the building are
also fixed appliances.
3.8.101
particle foam material
closed cell material moulded from thermoplastic particles (e.g. beads) with expanding agent
3.101
heat pump
appliance which takes up heat at a certain temperature and releases heat at a higher
temperature
Note 1 to entry: When operated to provide heat (e.g., for space heating or water heating), the appliance is said to
operate in the heating mode; when operated to remove heat (for example, for space cooling), it is said to operate in
the cooling mode.
Note 2 to entry: A heat pump can contain a combination of condensing unit or condenser unit and an
evaporating unit or evaporator unit and can be equipped to operate in a reverse cycle mode.
3.102
sanitary hot water heat pump
heat pump intended to transfer heat to water suitable for human consumption
3.103
air conditioner
encased assembly or assemblies designed as an appliance to provide delivery of conditioned
air to an enclosed space, room or zone
Note 1 to entry: It includes an electrically operated refrigerating system for cooling and possibly dehumidifying
the air.
Note 2 to entry: It can have means for heating, circulating, cleaning and humidifying the air.
Note 3 to entry: An air conditioner can contain a combination of condensing unit or condenser unit and an
evaporating unit or evaporator unit.
3.104
dehumidifier
encased assembly designed to remove moisture from its surrounding atmosphere
Note 1 to entry: It includes an electrically operated refrigerating system and the means to circulate air. It also
includes a drain arrangement for collecting and storing and/or disposing of the condensate.
3.108
wet-bulb temperature
WB
temperature indicated when the temperature-sensitive element in a wetted wick has reached a
state of constant temperature (evaporative equilibrium)
3.109
dry-bulb temperature
DB
temperature indicated by a dry, temperature-sensitive element shielded from the effects of
radiation
IEC 60335-2-40:2022 © IEC 2022 – 13 –
3.110
evaporator
heat exchanger in which refrigerant liquid is vaporized by absorption of heat
3.111
heat exchanger
device specifically designed to transfer heat between two physically separated fluids (gas or
liquid)
3.112
indoor heat exchanger
heat exchanger designed to transfer heat to the indoor parts of the building or to the indoor
hot water supplies (e.g. sanitary water) or to remove heat therefrom
3.113
outdoor heat exchanger
heat exchanger designed to remove or release heat from the heat source (for example, ground
water, outdoor air, exhaust air, water or brine)
3.114 Supplementary heaters
3.114.1
supplementary heater
electric heater that supplements or replaces the output of the refrigerant circuit for the purpose
of heating air or water
3.114.2
supplementary water heater
supplementary heater specifically for the purpose of heating water
3.114.3
supplementary air heater
supplementary heater specifically for the purpose of heating air in conjunction with, or instead
of, the refrigerating circuit
Note 1 to entry: Supplementary air heaters include electric heaters provided as part of an appliance with cooling-
only refrigerant circuits.
3.115
pressure-limiting device
mechanism that automatically responds to a predetermined pressure by stopping the operation
of the pressure-imposing element
3.116
pressure-relief device
pressure actuated valve or rupture member which functions to relieve excessive pressure
automatically
3.117
appliances accessible to the general public
appliances intended to be located in residential buildings or in commercial buildings in a location
without restricted access
3.118
appliances not accessible to the general public
appliances which are located in a secured location with restricted access (e.g. machine rooms,
rooftop and the like, or at a level above 2,5 m)

– 14 – IEC 60335-2-40:2022 © IEC 2022
3.119
hydronic fan coil unit
factory-made assembly which provides the function of forced circulation of air for heating and/or
cooling, which may also include the function of dehumidification and/or filtering of air, but
which does not include the source of cooling or heating
Note 1 to entry: Hydronic fan coil units can include provision for electric resistance heating. Heat exchanger coils
are intended for hydronic heating and cooling only.
3.120
flammable refrigerant
refrigerant classified as safety group A2L, A2 or A3 according to ISO 817
3.121
refrigerating system
combination of interconnected refrigerant containing parts constituting one closed refrigerant
circuit in which refrigerant is circulated for the purpose of extracting heat at the low temperature
side to reject heat at the high temperature side by changing the state of the refrigerant
3.122
maximum allowable pressure
the maximum pressure for which the equipment is designed, as specified by the manufacturer
Note 1 to entry: Maximum allowable pressure constitutes a limit to the operating pressure of a refrigerating
system, hydronic circuit or sanitary hot water tank whether the equipment is working or not, see Clause 21.
3.123
low-pressure side
part(s) of a refrigerating system operating at the evaporator pressure
3.124
high-pressure side
part(s) of a refrigerating system operating at the condenser pressure
3.125
service port
means to access the refrigerant in a refrigerating system for the purpose of charging or
servicing the system, typically a valve, tube extension or entry location
3.126
factory sealed single package unit
factory assembly of components of refrigerating system fixed on a common mounting to form
a discrete unit in which all refrigerating system parts have been sealed tight by welding,
brazing or a similar permanent connection during the manufacturing process
3.127
pre-charged pipe sets
interconnecting refrigerant lines which are supplied with the unit and supplied with a refrigerant
charge for the purpose of completing the refrigerating system in the field for appliances that
are made up of more than one subassembly and are assembled in the field to complete the
refrigerating system
3.128
condenser
heat exchanger in which refrigerant vapour is condensed by removal of heat

IEC 60335-2-40:2022 © IEC 2022 – 15 –
3.129
condensing unit
factory-made assembly that includes one or more motor-compressors, condenser in cooli
...