IEC 60335-2-40:2024

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

IEC 60335-2-40:2024 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 other appliances including direct current (DC) supplied appliances and battery-operated 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 laypersons 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.
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.
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 specify the criteria to ensure competence of persons during installation, servicing and disposal. Safety requirements during disposal are not specified in this standard.
Annex HH provides informative requirements on competence of personnel. 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.
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 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).
This eighth edition cancels and replaces the seventh edition published in 2022. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Clause 12 : Part 1, Clause 12 has been made applicable;
b) Clause 19: requirement added for double wall heat exchangers to be resistant against freezing;
c) Clause 20: requirement modified for when

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

L'IEC 60335-2-40:2024 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 autres appareils, y compris les appareils alimentés en courant continu et les appareils alimentés par batteries.
Les appareils non destinés à un usage domestique normal, mais qui peuvent néanmoins 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. Lorsque les appareils sont fournis en plusieurs ensembles, les ensembles sont utilisés conjointement et les exigences correspondantes dépendent de l'utilisation des ensembles assortis.
Une définition du terme "motocompresseur" est donnée dans l'IEC 60335-2-34 qui indique que le terme "motocompresseur" est utilisé pour désigner un motocompresseur hermétique ou semi-hermétique.
En outre, l'IEC 60335-2-21 spécifie les exigences relatives aux cuves destinées au stockage de l'eau chauffée dans les pompes à chaleur pour production d'eau chaude sanitaire.
La présente norme ne couvre pas les fluides frigorigènes qui n'appartiennent pas aux groupes A1, A2L, A2 et A3 qui sont définis dans 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 prend pour hypothèse que l'installation, l'entretien, la mise hors service et la mise au rebut sont effectués en toute sécurité par des personnes compétentes et que le dégagement accidentel de fluides frigorigènes est évité. Toutefois, elle ne spécifie pas les critères qui permettent d'assurer la compétence des personnes lors de l'installation, de l'entretien et de la mise au rebut. Les exigences de sécurité pendant la mise au rebut ne sont pas spécifiées dans la présente norme.
L'Annexe HH fournit des exigences informatives relatives à la compétence du personnel. Les critères de compétence du personnel aux fins des systèmes de certification figurent dans l'ISO 22712.
Sauf spécification contraire dans la présente norme et ses annexes, les exigences relatives à la sécurité des systèmes frigorifiques sont spécifiées dans:
– l'ISO 5149-1:2014, l'ISO 5149-1:2014/AMD1:2015 et l'ISO 5149-1:2014/AMD2:2021;
– l'ISO 5149-2:2014 et l'ISO 5149-2:2014/AMD1:2020;
– l'ISO 5149-3:2014 et l'ISO 5149-3:2014/AMD1:2021.
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

General Information

• Status: Published
• Publication Date: 10-Dec-2024
• ICS: 23.120 - Ventilators. Fans. Air-conditioners
• Technical Committee: SC 61D - Appliances for air-conditioning for household and similar purposes
• Drafting Committee: WG 22 - TC 61/SC 61D/WG 22
• Current Stage: PPUB - Publication issued
• Start Date: 11-Dec-2024
• Completion Date: 03-Jan-2025

Relations

• Revises: IEC 60335-2-40:2022/COR1:2024 - Corrigendum 1 - Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers
• Effective Date: 11-Oct-2024
• Revises: IEC 60335-2-40:2022 - Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers
• Effective Date: 05-Sep-2023

Overview

IEC 60335-2-40:2024 is the latest edition of the international safety standard for household and similar electrical appliances, specifically addressing electrical heat pumps, air-conditioners, and dehumidifiers. Published by the International Electrotechnical Commission (IEC), this eighth edition delivers comprehensive requirements to ensure the safety and reliability of these appliances in domestic and light industrial environments. The standard applies to appliances incorporating motor-compressors, hydronic fan coil units, thermoelectric heat pumps, and partial units with rated voltages up to 300 V for single-phase and 600 V for other types, including DC and battery-operated appliances.

This edition builds on previous versions by refining technical clauses, incorporating new safety measures against freezing in double wall heat exchangers, and aligning with related international standards.

Key Topics

• Scope and Applicability
  Covers household appliances that can also be used in shops, light industry, and farms, including appliances manufactured as single or multiple matched assemblies. Excludes humidifiers, industrial processing appliances, and those designed for corrosive or explosive atmospheres.

• Safety and Performance Requirements
  Addresses protection against access to live parts, starting procedures for motor-operated devices, leakage current limits, insulation strengths, heating elements, and mechanical hazards related to stability and strength.

• Refrigerant Considerations
  Specifies use of refrigerants classified in groups A1, A2L, A2, and A3 per ISO 817, focusing on safe handling of flammable refrigerants with molar masses ≥ 42 kg/kmol. It sets requirements for leak simulations, refrigerant sensors, and flame arresters particularly designed for A2L refrigerants.

• Testing and Compliance
  Details rigorous test methods including thermal motor protectors, endurance, overload protection, vibration resistance, and pressure testing. Specialized annexes provide information on charge limits, ventilation, leak detection, and refrigerant sensor location confirmation.

• Personnel Competence
  While the standard presumes installation and servicing are performed by competent personnel, Annex HH offers informative guidance on personnel qualifications. For formal certification requirements, ISO 22712 is referenced.

• Supplementary Heaters
  Requirements extend to heaters integrated as part of appliance packages, including their controls.

• Exclusions and Special Cases
  Notes that additional requirements may apply for appliances used in vehicles, ships, or aircraft, or per national regulations concerning labour protection, storage, building and transportation.

Applications

IEC 60335-2-40:2024 is essential for manufacturers, testing labs, certification bodies, and regulatory agencies involved with:

• Residential heat pumps and air conditioners
  Ensuring safety compliance in design, production, and maintenance phases for consumer appliances and similar electrical units.

• Commercial and light industrial HVAC systems
  Appliances designed for use outside typical household settings but still requiring stringent public safety controls.

• Dehumidifiers for household and commercial use
  Covering units with or without motor-compressors.

• Thermoelectric and hydronic fan coil units
  Governing safety norms for specialized heating and cooling units.

• Battery-operated and DC appliances
  Establishing performance benchmarks for emerging product types in household electrical appliances.

Compliance with this standard reduces the risk of electric shock, fire hazards, mechanical failures, refrigerant leaks, and environmental impacts-vital for consumer confidence, regulatory approval, and international market access.

Related Standards

• IEC 60335-2-34
  Defines motor-compressors, vital for understanding component classifications referenced by IEC 60335-2-40.

• IEC 60335-2-21
  Specifies safety requirements for containers used in sanitary hot water heat pumps.

• ISO 817
  Refrigerant classification and safety properties, dictating permissible refrigerants in the appliances covered.

• ISO 5149 Series (Parts 1-3)
  Addresses refrigerating systems and safety, supplementing refrigerant-related safety measures.

• IEC 60335-2-88
  Governs safety for humidifiers intended for heating and cooling equipment, excluded from this standard’s scope.

• ISO 22712
  Provides certification criteria for competence of installation and servicing personnel.

Manufacturers and compliance professionals should integrate IEC 60335-2-40 with these related standards to ensure comprehensive safety and regulatory adherence across product lifecycles.

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Keywords: IEC 60335-2-40:2024, electrical heat pumps safety, air conditioner standards, dehumidifier safety requirements, household electrical appliance standards, motor-compressor safety, flammable refrigerants, HVAC appliance safety, IEC electrical appliance standards, refrigerant safety IEC, electrical appliance testing, domestic air conditioner safety.

Standards Content (Sample)

IEC 60335-2-40 ®
Edition 8.0 2024-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
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
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IEC 60335-2-40 ®
Edition 8.0 2024-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
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 978-2-8327-0073-0

– 2 – IEC 60335-2-40:2024 © IEC 2024
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 Charging of metal-ion batteries . 29
13 Leakage current and electric strength at operating temperature . 29
14 Transient overvoltages . 29
15 Moisture resistance . 30
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 . 40
23 Internal wiring . 53
24 Components . 53
25 Supply connection and external flexible cords . 54
26 Terminals for external conductors . 54
27 Provision for earthing . 55
28 Screws and connections . 55
29 Clearances, creepage distances and solid insulation . 55
30 Resistance to heat and fire . 55
31 Resistance to rusting . 56
32 Radiation, toxicity and similar hazards . 57
Annexes . 63
Annex D (normative) Thermal motor protectors . 63
Annex I (normative) Motors having basic insulation that is inadequate for the rated
voltage of the appliance . 63
Annex AA (informative) Examples for operating temperatures of the appliance . 64
Annex BB (normative) Selected information about refrigerants . 65
Annex CC (informative) Transportation, marking and storage for units that employ
flammable refrigerants . 69

Annex DD (normative) Requirements for installation, service, maintenance and repair,
and decommissioning instructions of appliances using flammable refrigerants . 70
Annex EE (normative) Pressure tests . 80
Annex FF (normative) Leak simulation tests . 82
Annex GG (normative) Charge limits, ventilation requirements and requirements for

secondary circuits . 84
Annex HH (informative) Competence of service personnel . 119
Annex II (Void) . 122
Annex JJ (normative) Allowable openings of relays and similar components to prevent
ignition of A2L refrigerants . 123
Annex KK (normative) Test method for hot surface ignition temperature for A2L . 125
Annex LL (Void) . 129
Annex MM (normative) Refrigerant sensor location confirmation test . 130
Annex NN (normative) Flame arrest enclosure verification test for A2L refrigerants . 133
Annex OO (Void) . 135
Annex PP (normative) Leak detection system confirmation test for flammable
refrigerants . 136
Annex QQ (normative) Methods for determining releasable charge . 142
Bibliography . 150

Figure 101 – Example of label for field charged units . 58
Figure 102 – Arrangement for heating test of appliances with supplementary air heater . 60
Figure 103 – Supply circuit for locked-rotor test of a motor of the single-phase type . 61
Figure 104 – Power spectral density profile for vibration test in 21.101 . 61
Figure 105 – Dimensional details for the weight in the area of the pressure ball . 61
Figure 106 – Measurement before and after the test . 62
Figure GG.1 – Unventilated area. 115
Figure GG.2 – Mechanical ventilation . 116
Figure GG.3 – Relevant heights h , h and h for calculation of A and m . 117
inst 0 rel min max
Figure GG.4 – Airflow direction . 118
Figure KK.1 – Front view of test apparatus labels . 125
Figure KK.2 – Test apparatus with dimensions . 126
Figure KK.3 – Top view of test apparatus . 127

Table 101 – Power spectral density profile for vibration test . 39
Table 102 – UV-C spectral irradiance measurement location . 57
Table AA.1 – Examples for operating temperatures of the appliance . 64
Table BB.1 – Selected information about refrigerants. 65
Table DD.1 – Mandatory clauses in each of the instructions . 70
Table GG.1 – Outline of Annex GG . 85
Table GG.2 – Circulation airflow . 90
Table GG.3 – Appliance with packaging . 97
Table GG.4 – Appliance without packaging . 97
Table GG.5 – Minimum air velocity . 110

– 4 – IEC 60335-2-40:2024 © IEC 2024
Table GG.6 – Refrigerant leak rate (ṁ ) . 114
leak
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 60335-2-40 has been prepared by subcommittee 61D: Appliances for air-conditioning for
household and similar purposes, of IEC technical committee 61: Safety of household and similar
electrical appliances. It is an International Standard.
This eighth edition cancels and replaces the seventh edition published in 2022. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Clause 12 : Part 1, Clause 12 has been made applicable;
b) Clause 19: requirement added for double wall heat exchangers to be resistant against
freezing;
– 6 – IEC 60335-2-40:2024 © IEC 2024
c) Clause 20: requirement modified for when to apply test probe 18;
d) Clause 21: requirement added for double wall heat exchangers to resistant against the
pressure of the refrigerant if one of the walls fails;
e) Clause 22: requirement modified to reflect that appliances can operate continuously and
can be operated remotely without giving rise to a hazard, and requirement added for double
wall heat exchangers to be constructed to avoid refrigerant leaking into the secondary
circuit;
f) Annex LL has been deleted and replaced by a reference to IEC TS 63542:2024.
The text of this International Standard is based on the following documents:
Draft Report on voting
61D/538/FDIS 61D/542/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.
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.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments unless that edition precludes it; in that case, the latest edition that does not
preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.
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: Particular 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.
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 of a less permanent nature 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).
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, or
• revised.
IMPORTANT – The "colour inside" logo on the cover page of this document 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 60335-2-40:2024 © IEC 2024
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.
NOTE 3 Standards dealing with non-safety aspects of household appliances are:
– IEC standards published by TC 59 concerning methods of measuring performance;
– CISPR 11, CISPR 14-1 and relevant IEC 61000-3 series standards concerning electromagnetic emissions;
– CISPR 14-2 concerning electromagnetic immunity;
– IEC standards published by TC 111 concerning environmental matters.

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 other appliances including direct current (DC) supplied appliances
and battery-operated 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 laypersons 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 specify 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 personnel. 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.
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.

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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.
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, 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
IEC TS 63542:2024, Refrigerant detection systems for flammable refrigerants
ISO 527-3, Plastics − Determination of tensile properties − Part 3: Test conditions for films and
sheets
ISO 817, Refrigerants – Designation and safety classification
ISO 1302 , 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, Non-ducted air conditioners and heat pumps – Testing and rating for performance
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, 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.
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.
___________
Withdrawn.
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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
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)
3.119
hydronic fan coil unit
factory-made assembly which provides the function of forced circulation of air for heating and/or
cooling, which can 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.

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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 the 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
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
3.129
condensing unit
factory-made assembly that includes one or more motor-compressors, condenser in cooling
mode and motor-driven fan, blower or pump to circulate the heat transfer fluid through the
condenser with associated operational controls in addition to the necessary wiring
Note 1 to entry: These units are intended for field connection to an evaporator unit. A condensing unit can also
be equipped to operate in the reverse cycle mode. A condensing unit can include expansion device(s).

3.130
condenser unit
factory-made assembly that includes one or more condensers in cooling mode and motor-
driven fan, blower or pump to circulate the heat transfer fluid through the condenser with
associated operational controls in addition to the necessary wiring
Note 1 to entry: These units are intended for field connection to an evaporating unit. A condenser unit can also
be equipped to operate in the reverse cycle mode.
Note 2 to entry: A condenser unit does not include a motor-compressor or expansion device.
3.131
evaporating unit
factory-made assembly that includes one or more motor-compressors, evaporator in cooling
mode, expansion device(s), and motor-driven fan, blower or pump to circulate fluid through the
evaporator with associated operational controls in addition to the necessary wiring
Note 1 to entry: These units are intended for field connection to a condenser unit. An evaporating unit can also
be equipped to operate in the reverse cycle mode and can include provision for electric resistance heating or similar
sources of auxiliary heat.
3.132
evaporator unit
factory-made assembly that includes one or more evaporators in cooling mode, and can
include a motor-driven fan, blower or pump to circulate fluid through the evaporator with
associated operational controls in addition to the necessary wiring
Note 1 t
...