SIST EN 60335-2-40:2003

SLOVENSKI STANDARD
01-december-2003
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SIST EN 60335-2-40:1998
SIST EN 60335-2-40:1998/A1:2001
SIST EN 60335-2-40:1998/A11:2005
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Household and similar electrical appliances - Safety -- Part 2-40: Particular requirements
for electrical heat pumps, air-conditioners and dehumidifiers
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: Règles particulières
pour les pompes à chaleur électriques, les climatiseurs et les déshumidificateurs
Ta slovenski standard je istoveten z: EN 60335-2-40:2003
ICS:
23.120 =UDþQLNL9HWUQLNL.OLPDWVNH Ventilators. Fans. Air-
QDSUDYH conditioners
27.080 7RSORWQHþUSDONH Heat pumps
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60335-2-40
NORME EUROPÉENNE
EUROPÄISCHE NORM March 2003
ICS 23.120 Supersedes EN 60335-2-40:1997 + A1:2000
Incorporates Corrigendum April 2006

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

(IEC 60335-2-40:2002, modified)

Appareils électrodomestiques  Sicherheit elektrischer Geräte für den
et analogues - Hausgebrauch und ähnliche Zwecke
Sécurité Teil 2-40: Besondere Anforderungen
Partie 2-40: Règles particulières für elektrisch betriebene Wärmepumpen,
pour les pompes à chaleur électriques, Klimageräte und Raumluft-Entfeuchter
les climatiseurs et les déshumidificateurs (IEC 60335-2-40:2002, modifiziert)
(CEI 60335-2-40:2002, modifiée)

This European Standard was approved by CENELEC on 2003-03-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,
Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60335-2-40:2003 E
Foreword
The text of document 61D/116/FDIS, future fourth edition of IEC 60335-2-40, prepared by SC 61D of the
IEC Technical Committee 61, was submitted to the IEC-CENELEC parallel vote.
As a result of the Kista meeting of CENELEC TC 61 in May 2002, a draft amendment prAA containing the
relevant existing common modifications was submitted to the formal vote.
The texts of the FDIS and the prAA were approved by CENELEC as a new edition of EN 60335-2-40 on
2003-03-01.
This European Standard replaces EN 60335-2-40:1997 + A1:2000.
The following dates are applicable:
- latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2004-03-01
- date on which national standards
conflicting with the EN have to be withdrawn (dow) 2007-03-01
This part 2 has to be used in conjunction with EN 60335-1, Household and similar electrical appliances –
Safety – Part 1: General requirements. It was established on the basis of the 2002 edition of that standard.
Amendments and revisions of Part 1 have also to be taken into account and the dates when such
changes become applicable will be stated in the relevant amendment or revision of Part 1.
This part 2 supplements or modifies the corresponding clauses of EN 60335-1, so as to convert it into the
European 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 of
Part 1 is to be adapted accordingly.
NOTE 1 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.;
- subclauses, notes and annexes that are additional to those in the IEC standard are prefixed with the letter Z.
NOTE 2 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 the associated noun
are also in bold.
There are no special national conditions causing a deviation from this European Standard, other than
those listed in Annex ZA to EN 60335-1.
There are no national deviations from this European Standard, other than those listed in Annex ZB to
EN 60335-1.
Annex AA is for information only.
p NOTE  In this document, p is used in the margin to indicate instructions for preparing the printed version.
The contents of the corrigendum of April 2006 have been included in this copy.
_____________
- 3 - EN 60335-2-40:2003
Introduction
p Add:
An investigation by CENELEC TC 61 has shown that all risks from products within the scope of this
standard are fully covered by the Low Voltage Directive, 73/23/EEC. For products having mechanical
moving parts, a risk assessment in accordance with the Machinery Directive, 98/37/EC, has shown that
the risks are mainly of electrical origin and consequently this directive is not applicable. However, the
relevant essential safety requirements of the Machinery Directive are covered by this standard together
with the principal objectives of the Low Voltage Directive.
____________
Endorsement notice
The text of the International Standard IEC 60335-2-40:2002 was approved by CENELEC as a European
Standard with agreed common modifications as given below.
COMMON MODIFICATIONS
7 Marking and instructions
p 7.12.1 Add:
The installation instructions for appliances that are intended to be permanently connected to fixed wiring,
and have a leakage current that may exceed 10 mA, shall state that the installation of a residual current
device (RCD) having a rated residual operating current not exceeding 30 mA is advisable.
13 Leakage current and electric strength at operating temperature
p 13.2 Replace "the leakage current shall not exceed" by "the leakage current may exceed 3,5 mA but
shall not exceed”.
15 Moisture resistance
p Replace the first line by:
This clause of Part 1 is applicable except as follows.
p 15.1 Delete this subclause.
p 15.2 Delete this subclause.
p 15.3 Replace the subclause number by:
15.2 Addition:
16 Leakage current and electric strength
p 16.2 Replace "the leakage current shall not exceed" by "the leakage current may exceed 3,5 mA but
shall not exceed”.
__________
p Add:
Annex ZC
(normative)
Normative references to international publications
with their corresponding European publications
Publication Year Title EN/HD Year
IEC 60068-2-52 1996 Environmental testing – Part 2: Tests – EN 60068-2-52 1996
Test Kb: Salt mist, cyclic (sodium chloride
solution)
1) 2)
IEC 60335-2-34 – Household and similar electrical appliances – EN 60335-2-34 2002
Safety – Part 2-34: Particular requirements
for motor-compressors
1)
ISO 5149 – Mechanical refrigerating systems used for – –
cooling and heating – Safety requirements
____________
1)
undated reference
2)
valid edition at date of issue

INTERNATIONAL IEC
STANDARD
60335-2-40
Fourth edition
2002-12
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:
Règles particulières pour les pompes à chaleur électriques,
les climatiseurs et les déshumidificateurs
 IEC 2002  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch  Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
W
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – 60335-2-40  IEC:2002(E)
CONTENTS
FOREWORD . 4
INTRODUCTION .6
1 Scope . 7
2 Normative references. 8
3 Definitions . 8
4 General requirement .10
5 General conditions for the tests .10
6 Classification .10
7 Marking and instructions .11
8 Protection against access to live parts .12
9 Starting of motor-operated appliances .13
10 Power input and current.13
11 Heating.13
12 Void .18
13 Leakage current and electric strength at operating temperature .18
14 Transient overvoltages.18
15 Moisture resistance.19
16 Leakage current and electric strength .19
17 Overload protection of transformers and associated circuits.20
18 Endurance .20
19 Abnormal operation.20
20 Stability and mechanical hazards.26
21 Mechanical strength.26
22 Construction .26
23 Internal wiring.28
24 Components .28
25 Supply connection and external flexible cords.29
26 Terminals for external conductors .29
27 Provision for earthing.29
28 Screws and connections .30
29 Clearances, creepage distances and solid insulation .30
30 Resistance to heat and fire .30
31 Resistance to rusting .30
32 Radiation, toxicity and similar hazards .30
Annexes.34
Annex AA (informative) Examples for operating temperatures of the appliance .35
Bibliography.36

60335-2-40 © IEC:2002(E) – 3 –
Figure 101a) – Arrangement for heating test of appliances with supplementary heater –
upflow application .31
Figure 101b) – Arrangement for heating test of appliances with supplementary heater –
downflow application .32
Figure 102 – Supply circuit for locked-rotor test of a motor of the single-phase type –
Revise as needed for three-phase test .33
Table 3 – Temperature limits.16
Table 6 – Maximum winding temperature .21
Table 9 – Maximum abnormal temperature.25

– 4 – 60335-2-40  IEC:2002(E)
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 IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
This part of International Standard 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.
This fourth edition cancels and replaces the third edition published in 1995 and its
amendment 1 (2000). It constitutes a technical revision.
The text of this standard is based on the following documents:
FDIS Report on voting
61D/116/FDIS 61D/121/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fourth edition (2001) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 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.

60335-2-40 © IEC:2002(E) – 5 –
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 committee has decided that the contents of this publication will remain unchanged until
2003. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
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 bilingual version of this publication may be issued at a later date.

– 6 – 60335-2-40  IEC:2002(E)
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in
normal use taking into account the manufacturer's instructions. It also covers abnormal
situations that can be expected in practice.
This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
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.
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.
60335-2-40 © IEC:2002(E) – 7 –
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 International Standard deals with the safety of electric heat pumps, including sanitary
hot water heat pumps, air-conditioners, and dehumidifiers incorporating sealed motor-
compressors, their maximum rated voltages being not more than 250 V for single phase
appliances and 600 V for all other appliances.
Appliances not intended for normal household use but which nevertheless may be a source of
danger to the public, such as appliances intended to be used by laymen in shops, in light
industry and on farms, are within the scope of this standard.
The appliances referenced above may consist of one or more factory made assemblies. If
provided in more than one assembly, the separate assemblies are to be used together, and
the requirements are based on the use of matched assemblies.
NOTE 101 A definition of "sealed motor-compressor" is given in IEC 60335-2-34.
NOTE 102 Requirements for refrigeration safety are covered by ISO 5149, and 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.
NOTE 103 For appliances using flammable refrigerants, additional requirements are under consideration.
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 may be
necessary;
– for appliances subjected to pressure, additional requirements may be necessary;
– in many countries additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour, the national water supply authorities and similar authorities.
In the case of appliances for permanent connection to the water supply system, all relevant requirements need
to be observed.
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).

– 8 – 60335-2-40  IEC:2002(E)
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60068-2-52:1996, Environmental testing – Part 2: Tests – Test Kb: Salt mist, cyclic
(sodium chloride solution)
IEC 60335-2-34, Household and similar electrical appliances – Safety – Part 2-34: Particular
requirements for motor-compressors
ISO 5149, Mechanical refrigerating systems used for cooling and heating – Safety
requirements
3 Definitions
This clause of Part 1 is applicable except as follows.
3.1.4 Addition:
NOTE 101 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.
3.1.9 Replacement:
normal operation
conditions that apply when the appliance is mounted as in normal use and is operating under
the most severe operating conditions specified by the manufacturer
3.101
heat pump
appliance which takes up heat at a certain temperature and releases heat at a higher
temperature
NOTE 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.
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. It includes an electrically operated refrigeration
system for cooling and possibly dehumidifying the air. It may have means for heating,
circulating, cleaning and humidifying the air
3.104
dehumidifier
encased assembly designed to remove moisture from its surrounding atmosphere. It includes
an electrically operated refrigeration system and the means to circulate air. It also includes a
drain arrangement for collecting and storing and/or disposing of the condensate

60335-2-40 © IEC:2002(E) – 9 –
3.105
dehumidification – comfort
dehumidification to reduce the humidity within a space to a level to satisfy the requirements of
the occupants
3.106
dehumidification – process
dehumidification to reduce the humidity within a space to a level necessary for the process or
the storage of goods and/or materials or the drying out of the building fabric
3.107
dehumidification – heat recovery
dehumidification where the latent and sensitive heat removed from the space together with
the compressor heat is reused in another application rather than rejected outside to waste
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
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 heater
electric heater provided as part of the appliance to supplement or replace the output of the
refrigerant circuit of the appliance by operation in conjunction with, or instead of, the
refrigeration circuit
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
– 10 – 60335-2-40  IEC:2002(E)
3.117
self-contained unit
complete appliance, in suitable frames or enclosures, that is fabricated and shipped in one or
more sections, and has no refrigerant containing parts connected in the field other than by
companion or block valves
NOTE 1 A self-contained unit in a single frame or enclosure is called a single package unit.
NOTE 2 A self-contained unit in more than one frame enclosure is called a split package unit.
3.118
appliances accessible to the general public
appliances intended to be located in residential buildings or in commercial buildings
3.119
appliances not accessible to the general public
appliances which are intended to be maintained by qualified service personnel and located
either in machine rooms and the like or at a level not less than 2,5 m or in secured rooftop
areas
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.6 Addition:
Any controls which regulate the temperature or humidity of the conditioned space are
rendered inoperative during the test.
5.7 Replacement:
The tests and test conditions of Clauses 10 and 11 are carried out under the most severe
operating conditions within the operating temperature range specified by the manufacturer.
Annex AA provides examples of such temperature conditions.
5.10 Addition:
For split-package units, the refrigerant lines shall be installed in accordance with the
installation instructions. The refrigerant line length shall be the maximum length stated in the
installation instructions or 7,5 m, whichever is the shorter. The thermal insulation of the
refrigerant lines shall be applied in accordance with the installation instructions.
5.101 Motor-compressors are also subjected to the relevant test of Clause 19 of
IEC 60335-2-34, unless the motor-compressor complies with that standard, in which case it is
not necessary to repeat these tests.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Modification:
Appliance shall be of class I, class II or class III.

60335-2-40 © IEC:2002(E) – 11 –
6.2 Addition:
Appliances shall be classified according to degree of protection against harmfull ingress of
water in accordance with IEC 60529:
– appliances or parts of appliances intended for outdoor use shall be at least IPX4;
– appliances intended only for indoor use (excluding laundry rooms) may be IPX0;
– appliances intended to be used in laundry rooms shall be at least IPX1.
6.101 Appliances shall be classified according to the accessibility either as appliance
accessible to the general public or as appliance not accessible to the general public.
Compliance is checked by inspection and the relevant tests.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Modification:
Replace the second dash by:
– symbol for nature of supply including number of phases, unless for single phase operation.
Addition:
– rated frequency;
– the mass of the refrigerant, or of each refrigerant in a blend other than those of the
azeotropic type;
– the refrigerant identification:
• for a single component refrigerant, one of the following:
− the chemical formula;
− the refrigerant number;
• for a blended refrigerant, one of the following:
− the chemical name of each of the components;
− the chemical formula for each of the components;
− the refrigerant numbers of each of the components;
− the refrigerant number of the refrigerant blend;
– permissible excessive operating pressure for the storage tank (for sanitary hot water
heat pumps);
– for the refrigerant circuit; should the permissible excessive operating pressure for the
suction and discharge side differ, a separate indication is required;
– IP number according to degree of protection against ingress of water, other than IPX0.
Appliances shall be marked with all of the designations and the rated inputs of the
supplementary heaters for which they are intended to be used, and shall have provision for
identifying the actual heater that is field installed.
Unless it is evident from the design, the enclosure of the appliance shall be marked, by words
or by symbols, with the direction of the fluid flow.

– 12 – 60335-2-40  IEC:2002(E)
7.12 Addition:
For appliances not accessible to the general public, the classification according to 6.101
shall be included.
7.12.1 Addition:
In particular, the following information shall be supplied:
– that the appliance shall be installed in accordance with national wiring regulations;
– the dimensions of the space necessary for correct installation of the appliance including
the minimum permissible distances to adjacent structures;
– for appliances with supplementary heaters, the minimum clearance from the appliance to
combustible surfaces;
– a wiring diagram with a clear indication of the connections and wiring to external control
devices and supply cord;
– the range of external static pressures at which the appliance was tested (add-on heat
pumps, and appliances with supplementary heaters, only);
– the method of connection of the appliance to the electrical supply and interconnection of
separate components;
– indication of which parts of the appliance are suitable for outdoor use, if applicable;
– details of type and rating of fuses;
– details of supplementary heating elements that may be used in conjunction with the
appliance, including fitting instructions either with the appliance or with the supple-
mentary heater;
– maximum and minimum water or brine operating temperatures;
– maximum and minimum water or brine operating pressures.
Open storage tanks of heat pumps for water heating shall be accompanied by an instruction
sheet which shall state that the vent shall not be obstructed.
7.15 Addition:
A marking may be located on a panel that can be removed for installation or service, providing
that the panel shall be in place for the intended operation of the appliance.
7.101 A marking shall be provided for a replaceable fuse or a replaceable overload
protective device provided as a part of a product or remote control assembly. It shall be
visible when the cover or door of the compartment is open. This marking shall specify
– the rating of the fuse in amperes, the type and voltage rating, or
– the manufacturer and model designation of the replaceable overload protective device.
Compliance is checked by inspection.
7.102 If the product is intended for permanent connection to fixed wiring with aluminium
wires, the marking shall so state.
Compliance is checked by inspection.
8 Protection against access to live parts
This clause of Part 1 is applicable.

60335-2-40 © IEC:2002(E) – 13 –
9 Starting of motor-operated appliances
This clause of Part 1 is not applicable.
10 Power input and current
This clause of Part 1 is applicable.
11 Heating
This clause of Part 1 is replaced by the following.
11.1 Appliances and their surroundings shall not attain excessive temperatures in normal use.
Compliance is checked by determining the temperatures of the various parts under the
conditions specified in 11.2 to 11.7. Nevertheless, if the temperature of the motor winding
exceeds the value specified in Table 3 or if there is doubt with regard to the classification of
the insulation system employed in a motor, compliance is checked by the tests of Annex C.
11.2 Appliances are installed in a test room in accordance with the manufacturer's
installation instructions. In particular
– clearances to adjacent surfaces specified by the manufacturer shall be maintained;
– flow rates for liquid source or sink equipment shall be the minimum specified in the
manufacturer's instructions;
– the outlet duct connected to the appliance shall be subjected to the maximum static
pressure given in the manufacturer's instructions;
– for appliances provided with means of adjusting the flow, the flow for the tests shall be the
minimum obtainable;
– adjustable limit controls are set at the maximum cutout setting and the minimum
differential permitted by the control adjusting means.
For appliances provided with supplementary heaters, an additional test casing as described
in 11.9 is used.
11.2.1 For heating tests of appliances with supplementary heaters, an inlet duct is
connected to the inlet air opening of the appliance (assuming that the appliance is intended to
be so applied). The duct shall be the same size as the flanges, if flanges are provided. If
flanges are not provided, the duct is the same size as the inlet opening.
The inlet duct is provided with an adjustable restricting means by which the airflow can be
reduced.
The restriction should be uniform across the duct's cross sectional area, so that the full
heating coil surface will be exposed to the airflow except when the restriction is closed.
11.2.2 An appliance which does not include supplementary heaters is fitted with an outlet
duct sized to fit the casing flanges, or opening without flanges, or locations marked for
flanges, and arranged to discharge away from the return air inlet.
An appliance that includes or has provision for supplementary heater is fitted with a metal
outlet duct in accordance with Figure 101a) or Figure 101b), depending on the direction of the
airflow.
– 14 – 60335-2-40  IEC:2002(E)
The outlet duct is provided with a restricting means to obtain the maximum static pressure
given in the manufacturer's instructions.
11.3 Temperatures other than those of windings are determined by means of fine-wire
thermocouples so chosen and positioned that they have the minimum effect on the
temperature of the part under test.
NOTE 101 Thermocouples having wires with a diameter not exceeding 0,3 mm are considered to be fine-wire
thermocouples.
Thermocouples used for determining the temperatures of the surface of walls, ceiling and
floor are embedded in the surface or attached to the back of small blackened disks of copper
or brass, 15 mm in diameter and 1 mm thick, which are flush with the surface.
So far as is possible, the appliance is positioned so that parts likely to attain the highest
temperatures touch the disks.
In determining the temperatures of handles, knobs, grips and the like, consideration is given
to all parts which are gripped in normal use and, if of insulating material, to parts in contact
with hot metal.
The temperature of electrical insulation, other than that of windings, is determined on the
surface of the insulation, at places where failure could cause a short circuit, contact between
live parts and accessible metal parts, bridging of insulation or reduction of clearances and
creepage distances below the values specified in Clause 29.
Temperatures of windings are determined by the resistance method unless the windings are
non-uniform or severe complications are involved in order to make the necessary
connections, in which case the temperatures are determined by means of thermocouples.
The temperatures in the duct are to be measured by means of a thermocouple grid consisting
of nine thermocouples of identical length, wired in parallel to form a grid with a thermocouple
located centrally in each of nine equal duct areas in a plane perpendicular to the axis of the
airflow.
11.4 Appliances are operated under normal operation at a supply voltage between
0,94 times the lowest rated voltage and 1,06 times the highest rated voltage, the voltage
chosen being that which gives the most unfavourable result. Heating elements shall be
energized at a voltage which gives an electrical input of 1,15 times the maximum rated power
input.
11.5 Where appliance can be operated in the cooling mode as well as the heating mode, a
test is conducted in each mode.
For appliances with supplementary heaters or provision for supplementary heaters, in
additional test is conducted with all the heating elements operative by short circuiting
thermostats or by reducing, if necessary, the air temperature to a value which causes all the
elements to switch on.
11.6 Appliances with defrost facilities, are additionally submitted for a defrost test in the
most unfavourable conditions.
11.7 All appliances are operated continuously until steady conditions are achieved except
for defrost tests.
11.8 During the test the temperatures are monitored continuously and shall not exceed the
values shown in Table 3, protective devices shall not operate and sealing compound shall
not flow out.
60335-2-40 © IEC:2002(E) – 15 –
The temperature of the air in the outlet duct shall not exceed 90 °C.
NOTE 101 The value of the temperature of a winding is calculated from the formula:
R
T = ()k + T − k
R
where:
T is the temperature of the copper winding at the end of the test
R is the resistance at the beginning of the test
R is the resistance at the end of the test
T is the ambient temperature at the beginning of the test
k is equal to 234,5 for copper windings and 225 for aluminium windings.
At the beginning of the test, the windings shall be at ambient temperature.
It is recommended that the resistance of windings at the end of the test be determined by taking resistance
measurements as soon as possible after switching off, and then at short intervals so that a curve of resistance
against time can be plotted for ascertaining the resistance at the instant of switching off.

– 16 – 60335-2-40  IEC:2002(E)
Table 3 – Temperature limits
Temperature
Parts
°C
a
Windings of sealed motor-compressors
– with synthetic insulation . 140
– with other insulation. 130
External enclosures of sealed motor-compressors or of any other motor. 150
b
Windings if the winding insulation is (other than motor-compressors):
c
– of class A
...