IEC 60335-2-89:2010

IEC 60335-2-89 ®
Edition 2.0 2010-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-89: Particular requirements for commercial refrigerating appliances
with an incorporated or remote refrigerant unit or compressor

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-89: Règles particulières pour les appareils de réfrigération à usage
commercial avec une unité de fluide frigorigène ou un compresseur incorporés
ou à distance
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IEC 60335-2-89 ®
Edition 2.0 2010-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-89: Particular requirements for commercial refrigerating appliances
with an incorporated or remote refrigerant unit or compressor

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-89: Règles particulières pour les appareils de réfrigération à usage
commercial avec une unité de fluide frigorigène ou un compresseur incorporés
ou à distance
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
X
CODE PRIX
ICS 97.130.20 ISBN 2-8318-6292-2
SC 61C/IEC 60335-2-89 (2010), second edition/I-SH 01

HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES – SAFETY –

Part 2-89: Particular requirements for commercial refrigerating appliances

with an incorporated or remote refrigerant unit or compressor

INTERPRETATION SHEET 1
This interpretation sheet has been prepared by subcommittee 61C: Safety of refrigeration
appliances for household and commercial use, of technical committee 61: Safety of household
and similar electrical appliances
The text of this interpretation sheet is based on the following documents:
ISH Report on voting
61C/562/ISH 61C/571/RVISH
Full information on the voting for the approval of this interpretation sheet can be found in the
report on voting indicated in the above table.
___________
SC 61C interpretation sheet on: Pressure relief devices used in transcritical
refrigeration systems
Introduction
Requirements for refrigeration systems that use transcritical refrigerants such as CO (R 744)
were introduced into the standard in 2010; however at the time few manufacturers saw
transcritical refrigerants as a future progression. It is only recently that commercial
refrigerating appliances using such systems are being developed and as a result some
clarification of the standard is required due to practicalities of technology being applied.
There is a requirement in 22.103 that appliances employing a transcritical refrigeration

system shall include a pressure relief device in the high pressure side of the refrigeration
system. The intent of this device is to prevent the pressure of the system exceeding the
design pressure should a malfunction occur, such as a failure of the gas cooler fan motor.
A pressure test is carried out on the system with the pressure relief device rendered
inoperative to ensure that the high side of the system and components can withstand at least
3 times the design pressure or as a minimum the high side pressure specified in
IEC 60335-2-34, which in the case of R 744 (CO ) is 420 bar (42 MPa).
The pressure relief device is defined in 3.111 as a “pressure sensing device intended to
reduce pressure automatically when pressures within the refrigeration system exceed the
setting pressure of the device”.
As per the text of 22.103 the operating pressure of the pressure relief device shall be no
higher than the design pressure of the high pressure side. The component test parameters
for several different types of pressure relief device such as mechanical, electrical and those
of the burst disc type are listed in the addition of 24.1.4.

Questions
On the basis that the pressure relief device can maintain the design pressure by either

venting refrigerant from the refrigeration system or by automatically shutting down the

pressure generating element (the compressor),

1) How to apply the second paragraph of 22.103 where the pressure is controlled by

automatically shutting down the pressure generating element (the compressor).

2) Subclause 24.101 specifies requirements to ensure that the discharge capacity of the

pressure relief device is adequate and which can be verified by calculation or by a

test. In the case of an electrical pressure relief device that automatically shuts down
the compressor instead of externally venting refrigerant is this clause relevant?
Relevant text from IEC 60335-2-89:
The second paragraph of 22.103 states in regard to the mounting of the pressure relief
device: “The pressure relief device shall be mounted so that the refrigerant released from
the system cannot cause any harm to the user of the appliance. The aperture shall be located
so that it is unlikely to be obstructed in normal use.”
Subclause 24.101 states:
24.101 The discharge capacity of the pressure relief device shall be such that it is able to
release an adequate amount of refrigerant so that the pressure during the release of the
refrigerant does not increase beyond the pressure setting of the pressure relief device, even
if the compressor is operating.
Compliance is checked by validation of the manufacturer’s calculations or by an appropriate
test.
ANSWERS
1) The second paragraph of 22.103 is not relevant where the pressure is controlled by
automatically shutting down the pressure generating element (the compressor) since
the pressure is not controlled by releasing refrigerant from the system.
2) Subclause 24.101 is not relevant to a pressure relief device that senses pressure and
shuts down the compressor automatically if the system high side pressure exceeds the
high side design pressure since such a device does not have a discharge capacity.

July 2014 ICS 97.130.20
– 2 – 60335-2-89 © IEC:2010
CONTENTS
FOREWORD.4

INTRODUCTION.7

1 Scope.8

2 Normative references .8

3 Definitions .9

4 General requirement.11

5 General conditions for the tests .11

6 Classification.12
7 Marking and instructions.12
8 Protection against access to live parts.15
9 Starting of motor-operated appliances .16
10 Power input and current .16
11 Heating .16
12 Void.18
13 Leakage current and electric strength at operating temperature.18
14 Transient overvoltages .18
15 Moisture resistance .18
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 .22
21 Mechanical strength .22
22 Construction .22
23 Internal wiring.31
24 Components .31
25 Supply connection and external flexible cords .33
26 Terminals for external conductors.33
27 Provision for earthing .33

28 Screws and connections .33
29 Clearances, creepage distances and solid insulation.34
30 Resistance to heat and fire.34
31 Resistance to rusting.34
32 Radiation, toxicity and similar hazards.34
Annexes .37
Annex C (normative) Ageing test on motors .37
Annex D (normative) Thermal motor protectors.37
Annex P (informative) Guidance for the application of this standard to appliances
used in warm damp equable climates.37
Annex AA (normative) Locked-rotor test of fan motors .38
Annex BB (normative) Non-sparking “n” electrical apparatus.40
Bibliography.42

60335-2-89 © IEC:2010 – 3 –
Figure 101 – Apparatus for spillage test.35

Figure 102 – Scratching tool tip details .36

Figure AA.1 – Supply circuit for locked-rotor test of a single-phase fan motor .39

Table 101 – Maximum temperatures for motor-compressors .18

Table 102 – Refrigerant flammability parameters .30

– 4 – 60335-2-89 © IEC:2010
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –

SAFETY –
Part 2-89: Particular requirements for commercial refrigerating appliances

with an incorporated or remote refrigerant unit or compressor

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). 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. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This part of International Standard IEC 60335 has been prepared by subcommittee 61C:
Household appliances for refrigeration, of IEC technical committee 61: Safety of household
and similar electrical appliances.
This second edition cancels and replaces the first edition published in 2002 including its
Amendment 1 (2005) and amendment 2 (2007). It constitutes a technical revision.
The principal changes in this edition as compared with the first edition of IEC 60335-2-89 are
as follows (minor changes are not listed):
– aligns the text with IEC 60335-1, and its Amendments 1 and 2;
– introduces requirements for appliances using transcritical refrigerant systems (3.107,
3.108, 3.109, 3.110, 3.111, 7.1, 7.6, 7.12.1, 22.103, 24.1.4, 24.102)
– introduces an enhanced flexing test (23.3)

60335-2-89 © IEC:2010 – 5 –
The text of this standard is based on the following documents:

FDIS Report on voting
61C/208/FDIS 61C/211/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 publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

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 commercial
refrigerating appliances with an incorporated or remote refrigerant unit or compressor.
Where a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. Where 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 the
associated noun are also in bold.
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 publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 12 months or later than 36 months from the date of publication.
The following differences exist in the countries indicated below.

– 6 – 60335-2-89  IEC:2010
 22.101: E12 and E17 lamp holders are checked as specified for E14 and B15 lamp holders. E26 lamp holder is

checked as specified for E27 and B22 lamp holders (Japan).

 22.109: For unsealed glass tube heaters, the temperature requirements are different (Japan).

The contents of the interpretation sheet of July 2014 have been included in this copy.

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 publication using a colour printer.

60335-2-89 © IEC:2010 – 7 –
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 and takes into account the way in which

electromagnetic phenomena can affect the safe operation of appliances.

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.
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 and generic standards 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. For
example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as
ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 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 which 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.
– 8 – 60335-2-89 © IEC:2010
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –

SAFETY –
Part 2-89: Particular requirements for commercial refrigerating appliances

with an incorporated or remote refrigerant unit or compressor

1 Scope
This clause of Part 1 is replaced by the following.
This International Standard specifies safety requirements for electrically operated commercial
refrigerating appliances that have an incorporated compressor or that are supplied in two
units for assembly as a single appliance in accordance with the manufacturer’s instructions
(split system).
NOTE 101 Examples of appliances that are within the scope of this standard are
– refrigerated display and storage cabinets;
– refrigerated trolley cabinets;
– service counters and self-service counters;
– blast chillers and blast freezers.
As far as is practicable, this standard deals with the common hazards presented by these
types of appliances.
It does not cover those features of construction and operation of refrigerating appliances
which are dealt with in ISO standards.
NOTE 102 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;
– in many countries, additional requirements are specified by national authorities.
NOTE 103 This standard does not apply to
– domestic refrigerating appliances (IEC 60335-2-24)
– industrial refrigerating systems;
– motor-compressors (IEC 60335-2-34);
– commercial dispensing appliances and vending machines (IEC 60335-2-75);
– commercial ice-cream appliances;
– commercial ice makers;
– cold temperature rooms;
– multiple refrigerated chambers with a remote compressor.
NOTE 104 Appliances with a charge of more than 150 g of flammable refrigerant in each separate refrigerant
circuit are not covered by this standard. For appliances with a charge greater than 150 g of flammable refrigerant
in each refrigerant circuit and for the installation, ISO 5149 may be applied. Consequently, such appliances cannot
be assessed for safety using this part 2.
2 Normative references
This clause of Part 1 is applicable except as follows:
Addition:
60335-2-89 © IEC:2010 – 9 –
IEC 60079-4, Electrical apparatus for explosive gas atmospheres – Part 4: Method of test for

ignition temperature
IEC 60079-4A, Electrical apparatus for explosive gas atmospheres – Part 4: Method of test for

ignition temperatures – First supplement

IEC 60079-15:2005, Electrical apparatus for explosive gas atmospheres – Part 15:

Construction, test and marking of type of protection "n" electrical apparatus

IEC/TR 60079-20, Electrical apparatus for explosive gas atmospheres – Part 20: Data for

flammable gases and vapours, relating to the use of electrical apparatus

IEC 60335-2-5, Household and similar electrical appliances – Safety – Part 2-5: Particular
requirements for dishwashers
IEC 60335-2-34:2002, Household and similar electrical appliances – Safety – Part 2-34:
Particular requirements for motor-compressors
Amendment 1 (2004)
1)
Amendment 2 (2008)
ISO 817, Refrigerants – Designation system
ISO 3864-1, Graphical symbols – Safety colours and safety signs – Part 1: Design principles
for safety signs in workplaces and public areas
ISO 4126-2:2003, Safety devices for protection against excessive pressure – Bursting disc
safety devices
ISO 5149, Mechanical refrigerating systems used for cooling and heating – Safety
requirements
3 Definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions:

Refrigerating appliances are operated at an ambient temperature in accordance with 5.7,
empty, with doors or lids closed, or roller blinds closed or open, whichever is the more
unfavourable. User adjustable temperature control devices are short-circuited or otherwise
rendered inoperative. Devices which are switched, by dew-point controls or clocks, are
switched on or off, whichever is the more unfavourable.
For appliances connected to a water supply, the water other than cooling water, is at a
temperature of 15 °C ± 2 °C. The cooling water is at the maximum temperature specified in
the instruction.
For appliances with a separate refrigerant unit, the refrigerant unit is connected to the
cabinet in accordance with the manufacturer’s instructions.
—————————
1)
There exists a consolidated edition 4.2 (2009) that includes Edition 4 and its Amendment 1 and Amendment 2.

– 10 – 60335-2-89 © IEC:2010
3.101
refrigerated display and storage cabinet

enclosed cabinet which displays or stores beverages or chilled or frozen foodstuff placed

therein and which is cooled by a refrigerant unit

3.102
ancillary heating element
heating device which performs an auxiliary function, such as a defrost heater, door heater or

anti-condensation heater
3.103
skilled person
person having the appropriate technical training and experience necessary to be aware of
hazards to which he or she is exposed in performing a task and of measures necessary to
minimize the danger to his or herself or other persons
3.104
refrigerant unit
factory assembled unit for performing part of the refrigeration cycle (compressing gas,
condensation or gas cooling) comprising of one or more refrigerant compressors with motors,
condensers or gas coolers, liquid receivers, interconnection pipe work and ancillary
equipment, all mounted on a common base
3.105
flammable refrigerant
refrigerant with a flammability classification of group 2 or 3 in accordance with ISO 5149
NOTE For refrigerant blends which have more than one flammability classification, the most unfavourable
classification is taken for the purposes of this definition.
3.106
free space
space with a volume exceeding 60 l in which a child can be entrapped and which is accessible
after opening any door, lid or drawer and removing any detachable internal part, including
shelves, containers or removable drawers which are themselves only accessible after opening
any door or lid. In calculating the volume, a space with any single dimension not exceeding
150 mm or any two orthogonal dimensions each of which do not exceed 200 mm is ignored
3.107
transcritical refrigeration system
refrigeration system where the pressure in the high pressure side is above the pressure
where the vapour and liquid states of the refrigerant can coexist in thermodynamic equilibrium

3.108
gas cooler
heat exchanger in which, after compression the refrigerant is cooled down, by transferring
heat to an external cooling medium, without changing state
NOTE A gas cooler is normally used in transcritical refrigeration systems.
3.109
design pressure
gauge pressure that has been assigned to the high pressure side of a transcritical
refrigeration system
3.110
bursting disc
disc or foil which bursts at a predetermined pressure to reduce a pressure in a refrigeration
system
60335-2-89 © IEC:2010 – 11 –
3.111
pressure relief device
pressure sensing device, intended to reduce pressure automatically when pressures within

the refrigeration system exceed the setting pressure of the device

4 General requirement
This clause of Part 1 is applicable except as follows.

Addition:
NOTE 101 The use of flammable refrigerants involves some additional hazards which are not associated with
appliances which use non-flammable refrigerants.
This standard addresses the hazard due to ignition of leaked flammable refrigerant by potential ignition sources
associated with the appliance.
The hazard due to ignition of leaked flammable refrigerant by an external potential ignition source associated with
the environment in which the appliance is installed is compensated for by the low probability of ignition.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.2 Addition:
At least one additional specially prepared sample is required for the tests of 22.107.
NOTE 101 Unless the motor-compressor complies with IEC 60335-2-34, at least one additional specially prepared
sample may be required for the test of 19.1.
NOTE 102 At least one additional sample of the fan motor, thermal motor protector combination may be required
for the test of 19.1.
NOTE 103 The test of 22.7 may be performed on separate samples.
NOTE 104 Due to the potentially hazardous nature of the tests of 22.107, 22.108 and 22.109, special precautions
may need to be taken when performing the tests.
5.3 Addition:
Before starting the tests, the appliance shall be operated at rated voltage for at least 24 h,
then switched off and left to stand for at least 12 h.

5.7 Addition:
Tests in accordance with Clauses 10, 11 and 13 are performed at an ambient temperature of
– 32 °C ± 2 °C on appliances of climatic class 0, 1, 2, 3 , 4 or 6;
– 43 °C ± 2 °C on appliances of climatic class 5 or 7.
Before starting the tests specified in 10, 11 and 13, the appliance, with the doors or lids open,
is brought to the ambient specified temperature ±2 K.
Other tests are performed at an ambient temperature of 20 °C ± 5 °C.
Appliances classified for several climatic classes are tested at the ambient temperature
relevant to the highest climatic class.

– 12 – 60335-2-89 © IEC:2010
NOTE 101 Steady conditions are considered to be established when three successive readings of the

temperature, taken at approximately 60 min intervals, at the same point of any operating cycle, do not differ by
more than 1 K.
5.10 Addition:
For the tests of 22.107, 22.108 and 22.109, the appliance is empty and installed as follows.

Built-in appliances are installed in accordance with the instructions for installation.

Other appliances are placed in a test enclosure, the walls of which enclose the appliance as

closely as possible to all its sides and top surface, unless the manufacturer indicates in the
instructions for installation that a free distance shall be observed from the walls or the ceiling,
in which case this distance is observed during the test.
5.101 Appliances which use flammable refrigerants and which, according to the
instructions, may be used with other electrical appliances inside a food storage compartment,
are tested with such recommended appliances incorporated and in operation as they would be
in normal use.
NOTE Examples of such electrical appliances are ice-cream makers and deodorizers.
6 Classification
This clause of Part 1 is applicable except as follows.
6.101 Refrigerated display and storage cabinets shall be at least one of the following
climatic classes:
– appliance of class 0;
– appliance of class 1;
– appliance of class 2;
– appliance of class 3;
– appliance of class 4;
– appliance of class 5;
– appliance of class 6;
– appliance of class 7.
Compliance is checked by inspection.

NOTE The climatic classes are specified in ISO 23953-2.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Modification:
Replace the third dash by:
– rated current, in amperes;
Addition:
– the power input, in watts, of heating systems, if greater than 100 W;

60335-2-89 © IEC:2010 – 13 –
– the defrosting power input, in watts, if the current corresponding to the defrosting power

input is greater than the rated current of the appliance;

– one or more of the numerals; 0, 1, 2, 3, 4, 5, 6 or 7, indicating the climatic class of the

appliance;
– for incandescent lamps, the maximum rated wattage of the lamp, in watts;

– for discharge lamps, the rated wattage of the lamp, in watts;

– the total mass of refrigerant for each separate refrigerant circuit;

– for a single component refrigerant, at least one of the following:

• the chemical name,
• the chemical formula,
• the refrigerant number;
– for a blended refrigerant, at least one of the following:
• the chemical name and nominal proportion of each of its components,
• the chemical formula and nominal proportion of each of its components,
• the refrigerant number and nominal proportion of each of its components,
• the refrigerant number of the refrigerant blend.
– the chemical name or refrigerant number of the principal component of the insulation
blowing gas.
Refrigerent numbers shall be quoted in accordance with ISO 817.
NOTE 101 Pipe insulation or small items of insulation are not required to be marked.
Appliances which use flammable refrigerants shall be marked with the symbol “Caution: risk
of fire”.
Appliances employing R-744 in a transcritical refrigeration system shall be marked with the
substance of the following:
WARNING: System contains refrigerant under high pressure. Do not tamper with the
system. It must be serviced by qualified persons only.
Appliances employing R-744 in a transcritical refrigeration system shall be marked with
symbol ISO 7000-1701 (2004-01).
Appliances without automatic liquid-level control and which are intended to be connected to
the water supply mains or to be filled with liquid by the user shall be marked with the
maximum liquid level.
7.6 Addition:
Symbol ISO 3864-B.3.2 Caution: risk of fire

Symbol ISO 7000-1701 (2004-01) Pressure

– 14 – 60335-2-89 © IEC:2010
NOTE The rules for warning signs in ISO 3864-1 apply to the colour and shape of the symbol Caution: risk of fire.

7.12 Modification:
The instructions concerning persons (including children) with reduced physical, sensory or

mental capabilities, or lack of experience and knowledge and children playing with the

appliance are not required.
Addition:
The instructions shall contain information regarding the maximum loading of each type of

shelf.
The instructions shall state the substance of the following.
Do not store explosive substances such as aerosol cans with a flammable propellant in
this appliance.
If symbol ISO 7000-1701 (2004-01) is used, its meaning shall be explained.
For appliances which use flammable refrigerants, the instructions shall include information
pertaining to the handling, servicing and disposal of the appliance.
The instructions for appliances which use flammable refrigerants shall include the substance
of the following warnings:
– WARNING: Keep clear of obstruction all ventilation openings in the appliance
enclosure or in the structure for building-in.
– WARNING: Do not use mechanical devices or other means to accelerate the
defrosting process, other than those recommended by the manufacturer.
– WARNING:  Do not damage the refrigerant circuit.
NOTE 101 This warning is only applicable for appliances with refrigerating circuits which are accessible by the
user.
– WARNING: Do not use electrical appliances inside the food storage compartments of
the appliance, unless they are of the type recommended by the
manufacturer.
For appliances which use flammable insulation blowing gases, the instructions shall include
information regarding disposal of the appliance.
For appliances provided with double-capped fluorescent lamps, the instructions shall include

the information that lamps have to be replaced by identical lamps only.
An explanation shall be given of the meaning of the alpha-numeric characters, indicating the
climatic class of the appliance, that are marked on the appliance.
The instructions for split-systems that use a flammable refrigerant shall include the
substance of the following warning.
WARNING: In order to reduce flammability hazards the installation of this appliance must
only be carried out by a suitably qualified person.
7.12.1 Addition:
For appliances with a separate refrigerant unit, the instructions shall include a statement
containing the substance of the following:

60335-2-89 © IEC:2010 – 15 –
The installation of the appliance and the refrigerant unit must only be made by the

manufacturer’s service personnel or similarly skilled person.

The information provided with an appliance with a separate refrigerant unit shall include

– information on the type of separate refrigerant unit to which the cabinet shall be

connected;
– an electrical diagram showing the electrical terminals for connections.

In appliances employing R-744 in a transcritical refrigeration system the instructions shall

include the substance of the following

WARNING: The refrigeration system is under high pressure. Do not tamper
...

IEC 60335-2-89 ®
Edition 2.1 2012-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-89: Particular requirements for commercial refrigerating appliances
with an incorporated or remote refrigerant unit or compressor

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-89: Règles particulières pour les appareils de réfrigération à usage
commercial avec une unité de fluide frigorigène ou un compresseur incorporés
ou à distance
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IEC 60335-2-89 ®
Edition 2.1 2012-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –

Part 2-89: Particular requirements for commercial refrigerating appliances

with an incorporated or remote refrigerant unit or compressor

Appareils électrodomestiques et analogues – Sécurité –

Partie 2-89: Règles particulières pour les appareils de réfrigération à usage

commercial avec une unité de fluide frigorigène ou un compresseur incorporés

ou à distance
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX CN
ICS 97.130.20 ISBN 978-2-8322-0258-6

SC 61C/IEC 60335-2-89 (2010), second edition/I-SH 01

HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES – SAFETY –

Part 2-89: Particular requirements for commercial refrigerating appliances

with an incorporated or remote refrigerant unit or compressor

INTERPRETATION SHEET 1
This interpretation sheet has been prepared by subcommittee 61C: Safety of refrigeration
appliances for household and commercial use, of technical committee 61: Safety of household
and similar electrical appliances
The text of this interpretation sheet is based on the following documents:
ISH Report on voting
61C/562/ISH 61C/571/RVISH
Full information on the voting for the approval of this interpretation sheet can be found in the
report on voting indicated in the above table.
___________
SC 61C interpretation sheet on: Pressure relief devices used in transcritical
refrigeration systems
Introduction
Requirements for refrigeration systems that use transcritical refrigerants such as CO (R 744)
were introduced into the standard in 2010; however at the time few manufacturers saw
transcritical refrigerants as a future progression. It is only recently that commercial
refrigerating appliances using such systems are being developed and as a result some
clarification of the standard is required due to practicalities of technology being applied.
There is a requirement in 22.103 that appliances employing a transcritical refrigeration

system shall include a pressure relief device in the high pressure side of the refrigeration
system. The intent of this device is to prevent the pressure of the system exceeding the
design pressure should a malfunction occur, such as a failure of the gas cooler fan motor.
A pressure test is carried out on the system with the pressure relief device rendered
inoperative to ensure that the high side of the system and components can withstand at least
3 times the design pressure or as a minimum the high side pressure specified in
IEC 60335-2-34, which in the case of R 744 (CO ) is 420 bar (42 MPa).
The pressure relief device is defined in 3.111 as a “pressure sensing device intended to
reduce pressure automatically when pressures within the refrigeration system exceed the
setting pressure of the device”.
As per the text of 22.103 the operating pressure of the pressure relief device shall be no
higher than the design pressure of the high pressure side. The component test parameters
for several different types of pressure relief device such as mechanical, electrical and those
of the burst disc type are listed in the addition of 24.1.4.

Questions
On the basis that the pressure relief device can maintain the design pressure by either

venting refrigerant from the refrigeration system or by automatically shutting down the

pressure generating element (the compressor),

1) How to apply the second paragraph of 22.103 where the pressure is controlled by

automatically shutting down the pressure generating element (the compressor).

2) Subclause 24.101 specifies requirements to ensure that the discharge capacity of the

pressure relief device is adequate and which can be verified by calculation or by a

test. In the case of an electrical pressure relief device that automatically shuts down
the compressor instead of externally venting refrigerant is this clause relevant?
Relevant text from IEC 60335-2-89:
The second paragraph of 22.103 states in regard to the mounting of the pressure relief
device: “The pressure relief device shall be mounted so that the refrigerant released from
the system cannot cause any harm to the user of the appliance. The aperture shall be located
so that it is unlikely to be obstructed in normal use.”
Subclause 24.101 states:
24.101 The discharge capacity of the pressure relief device shall be such that it is able to
release an adequate amount of refrigerant so that the pressure during the release of the
refrigerant does not increase beyond the pressure setting of the pressure relief device, even
if the compressor is operating.
Compliance is checked by validation of the manufacturer’s calculations or by an appropriate
test.
ANSWERS
1) The second paragraph of 22.103 is not relevant where the pressure is controlled by
automatically shutting down the pressure generating element (the compressor) since
the pressure is not controlled by releasing refrigerant from the system.
2) Subclause 24.101 is not relevant to a pressure relief device that senses pressure and
shuts down the compressor automatically if the system high side pressure exceeds the
high side design pressure since such a device does not have a discharge capacity.

July 2014 ICS 97.130.20
– 2 – 60335-2-89  IEC:2010+A1:2012

CONTENTS
FOREWORD . 4

INTRODUCTION . 7

1 Scope . 8

2 Normative references . 8

3 Terms and definitions. 9

4 General requirement . 11

5 General conditions for the tests . 11
6 Classification . 12
7 Marking and instructions . 12
8 Protection against access to live parts . 16
9 Starting of motor-operated appliances . 16
10 Power input and current . 16
11 Heating . 17
12 Void. 19
13 Leakage current and electric strength at operating temperature . 19
14 Transient overvoltages . 19
15 Moisture resistance . 19
16 Leakage current and electric strength . 20
17 Overload protection of transformers and associated circuits . 20
18 Endurance . 20
19 Abnormal operation . 20
20 Stability and mechanical hazards . 22
21 Mechanical strength . 22
22 Construction . 23
23 Internal wiring . 32
24 Components . 33
25 Supply connection and external flexible cords . 34
26 Terminals for external conductors . 34
27 Provision for earthing . 34
28 Screws and connections . 35
29 Clearances, creepage distances and solid insulation . 35
30 Resistance to heat and fire . 35
31 Resistance to rusting . 36
32 Radiation, toxicity and similar hazards . 36

Annexes . 38
Annex C (normative) Ageing test on motors . 38
Annex D (normative) Thermal motor protectors . 38
Annex P (informative) Guidance for the application of this standard to appliances
used in warm damp equable climates. 38
Annex AA (normative) Locked-rotor test of fan motors . 39

60335-2-89  IEC:2010+A1:2012 – 3 –

Annex BB (normative) Non-sparking “n” electrical apparatus . 41

Bibliography . 43

Figure 101 – Apparatus for spillage test . 36

Figure 102 – Scratching tool tip details . 37

Figure AA.1 – Supply circuit for locked-rotor test of a single-phase fan motor . 40

Table 101 – Maximum temperatures for motor-compressors . 18

Table 102 – Refrigerant flammability parameters . 31

– 4 – 60335-2-89  IEC:2010+A1:2012

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –

SAFETY –
Part 2-89: Particular requirements for commercial refrigerating appliances

with an incorporated or remote refrigerant unit or compressor

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). 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. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

This consolidated version of IEC 60335-2-89 consists of the second edition (2010)
[documents 61C/460/FDIS and 61C/462/RVD] and its amendment 1 (2012) [documents
61C/507/FDIS and 61C/510/RVD]. It bears the edition number 2.1.
The technical content is therefore identical to the base edition and its amendment and
has been prepared for user convenience. A vertical line in the margin shows where the
base publication has been modified by amendment 1. Additions and deletions are
displayed in red, with deletions being struck through.

60335-2-89  IEC:2010+A1:2012 – 5 –

This part of International Standard IEC 60335 has been prepared by subcommittee 61C:
Household appliances for refrigeration, of IEC technical committee 61: Safety of household

and similar electrical appliances.

The principal changes in this edition as compared with the first edition of IEC 60335-2-89 are

as follows (minor changes are not listed):

– aligns the text with IEC 60335-1, and its Amendments 1 and 2;

– introduces requirements for appliances using transcritical refrigerant systems (3.107,

3.108, 3.109, 3.110, 3.111, 7.1, 7.6, 7.12.1, 22.103, 24.1.4, 24.102)

– introduces an enhanced flexing test (23.3)
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
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 commercial
refrigerating appliances with an incorporated or remote refrigerant unit or compressor.
Where a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. Where 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 the
associated noun are also in bold.
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.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 12 months or later than 36 months from the date of publication.
The following differences exist in the countries indicated below.
− 22.101: E12 and E17 lamp holders are checked as specified for E14 and B15 lamp holders. E26 lamp holder is
checked as specified for E27 and B22 lamp holders (Japan).
− 22.109: For unsealed glass tube heaters, the temperature requirements are different (Japan).

– 6 – 60335-2-89  IEC:2010+A1:2012

The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the stability date indicated on the IEC web site under

"http://webstore.iec.ch" in the data related to the specific publication. At this date, the

publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or

• amended.
The contents of the interpretation sheet of July 2014 have been included in this copy.

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 publication using a colour printer.

60335-2-89  IEC:2010+A1:2012 – 7 –

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 and takes into account the way in which

electromagnetic phenomena can affect the safe operation of appliances.

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.
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 and generic standards 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. For
example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as
ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 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 which 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.
– 8 – 60335-2-89  IEC:2010+A1:2012

HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –

SAFETY –
Part 2-89: Particular requirements for commercial refrigerating appliances

with an incorporated or remote refrigerant unit or compressor

1 Scope
This clause of Part 1 is replaced by the following.
This International Standard specifies safety requirements for electrically operated commercial
refrigerating appliances that have an incorporated compressor or that are supplied in two
units for assembly as a single appliance in accordance with the manufacturer’s instructions
(split system).
NOTE 101 Examples of appliances that are within the scope of this standard are
– refrigerated display and storage cabinets;
– refrigerated trolley cabinets;
– service counters and self-service counters;
– blast chillers and blast freezers.
As far as is practicable, this standard deals with the common hazards presented by these
types of appliances.
It does not cover those features of construction and operation of refrigerating appliances
which are dealt with in ISO standards.
NOTE 102 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;
– in many countries, additional requirements are specified by national authorities.
NOTE 103 This standard does not apply to
– domestic refrigerating appliances (IEC 60335-2-24)
– industrial refrigerating systems;
– motor-compressors (IEC 60335-2-34);
– commercial dispensing appliances and vending machines (IEC 60335-2-75);
– commercial ice-cream appliances;
– commercial ice makers;
– cold temperature rooms;
– multiple refrigerated chambers with a remote compressor.
NOTE 104 Appliances with a charge of more than 150 g of flammable refrigerant in each separate refrigerant
circuit are not covered by this standard. For appliances with a charge greater than 150 g of flammable refrigerant
in each refrigerant circuit and for the installation, ISO 5149 may be applied. Consequently, such appliances cannot
be assessed for safety using this part 2.
2 Normative references
This clause of Part 1 is applicable except as follows:
Addition:
60335-2-89  IEC:2010+A1:2012 – 9 –

IEC 60079-4, Electrical apparatus for explosive gas atmospheres – Part 4: Method of test for

ignition temperature
IEC 60079-4A, Electrical apparatus for explosive gas atmospheres – Part 4: Method of test for

ignition temperatures – First supplement

IEC 60079-15:2005, Electrical apparatus for explosive gas atmospheres – Part 15:

Construction, test and marking of type of protection "n" electrical apparatus

IEC 60079-15:2010, Explosive atmospheres – Part 15: Equipment protection by type of

protection "n"
IEC/TR 60079-20, Electrical apparatus for explosive gas atmospheres – Part 20: Data for
flammable gases and vapours, relating to the use of electrical apparatus
IEC 60335-2-5, Household and similar electrical appliances – Safety – Part 2-5: Particular
requirements for dishwashers
IEC 60335-2-34:2002, Household and similar electrical appliances – Safety – Part 2-34:
Particular requirements for motor-compressors
Amendment 1 (2004)
1)
Amendment 2 (2008)
ISO 817, Refrigerants – Designation system
ISO 3864-1, Graphical symbols – Safety colours and safety signs – Part 1: Design principles
for safety signs in workplaces and public areas
ISO 4126-2:2003, Safety devices for protection against excessive pressure – Bursting disc
safety devices
ISO 5149, Mechanical refrigerating systems used for cooling and heating – Safety
requirements
ISO 7010:2011, Graphical symbols – Safety colours and safety signs – Registered safety
signs
3 Terms and definitions
This clause of Part 1 is applicable except as follows.

3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions:
Refrigerating appliances are operated at an ambient temperature in accordance with 5.7,
empty, with doors or lids closed, or roller blinds closed or open, whichever is the more
unfavourable. User adjustable temperature control devices are short-circuited or otherwise
rendered inoperative. Devices which are switched, by dew-point controls or clocks, are
switched on or off, whichever is the more unfavourable.
For appliances connected to a water supply, the water other than cooling water, is at a
temperature of 15 °C ± 2 °C. The cooling water is at the maximum temperature specified in
the instruction.
—————————
1)
There exists a consolidated edition 4.2 (2009) that includes Edition 4 and its Amendment 1 and Amendment 2.

– 10 – 60335-2-89  IEC:2010+A1:2012

For appliances with a separate refrigerant unit, the refrigerant unit is connected to the

cabinet in accordance with the manufacturer’s instructions.

3.101
refrigerated display and storage cabinet

enclosed cabinet which displays or stores beverages or chilled or frozen foodstuff placed

therein and which is cooled by a refrigerant unit

3.102
ancillary heating element
heating device which performs an auxiliary function, such as a defrost heater, door heater or

anti-condensation heater
3.103
skilled person
person having the appropriate technical training and experience necessary to be aware of
hazards to which he or she is exposed in performing a task and of measures necessary to
minimize the danger to his or herself or other persons
3.104
refrigerant unit
factory assembled unit for performing part of the refrigeration cycle (compressing gas,
condensation or gas cooling) comprising of one or more refrigerant compressors with motors,
condensers or gas coolers, liquid receivers, interconnection pipe work and ancillary
equipment, all mounted on a common base
3.105
flammable refrigerant
refrigerant with a flammability classification of group 2 or 3 in accordance with ISO 5149
NOTE For refrigerant blends which have more than one flammability classification, the most unfavourable
classification is taken for the purposes of this definition.
3.106
free space
space with a volume exceeding 60 l in which a child can be entrapped and which is accessible
after opening any door, lid or drawer and removing any detachable internal part, including
shelves, containers or removable drawers which are themselves only accessible after opening
any door or lid. In calculating the volume, a space with any single dimension not exceeding
150 mm or any two orthogonal dimensions each of which do not exceed 200 mm is ignored
3.107
transcritical refrigeration system

refrigeration system where the pressure in the high pressure side is above the pressure
where the vapour and liquid states of the refrigerant can coexist in thermodynamic equilibrium
3.108
gas cooler
heat exchanger in which, after compression the refrigerant is cooled down, by transferring
heat to an external cooling medium, without changing state
NOTE A gas cooler is normally used in transcritical refrigeration systems.
3.109
design pressure
gauge pressure that has been assigned to the high pressure side of a transcritical
refrigeration system
60335-2-89  IEC:2010+A1:2012 – 11 –

3.110
bursting disc
disc or foil which bursts at a predetermined pressure to reduce a pressure in a refrigeration

system
3.111
pressure relief device
pressure sensing device, intended to reduce pressure automatically when pressures within

the refrigeration system exceed the setting pressure of the device

4 General requirement
This clause of Part 1 is applicable except as follows.
Addition:
NOTE 101 The use of flammable refrigerants involves some additional hazards which are not associated with
appliances which use non-flammable refrigerants.
This standard addresses the hazard due to ignition of leaked flammable refrigerant by potential ignition sources
associated with the appliance.
The hazard due to ignition of leaked flammable refrigerant by an external potential ignition source associated with
the environment in which the appliance is installed is compensated for by the low probability of ignition.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.2 Addition:
At least one additional specially prepared sample is required for the tests of 22.107.
NOTE 101 Unless the motor-compressor complies with IEC 60335-2-34, at least one additional specially prepared
sample may be required for the test of 19.1.
NOTE 102 At least one additional sample of the fan motor, thermal motor protector combination may be required
for the test of 19.1.
NOTE 103 The test of 22.7 may be performed on separate samples.
NOTE 104 Due to the potentially hazardous nature of the tests of 22.107, 22.108 and 22.109, special precautions
may need to be taken when performing the tests.

5.3 Addition:
Before starting the tests, the appliance shall be operated at rated voltage for at least 24 h,
then switched off and left to stand for at least 12 h.
5.7 Addition:
Tests in accordance with Clauses 10, 11 and 13 are performed at an ambient temperature of
– 32 °C ± 2 °C on appliances of climatic class 0, 1, 2, 3, 4, 6 or 8;
– 43 °C ± 2 °C on appliances of climatic class 5 or 7.
Before starting the tests specified in 10, 11 and 13, the appliance, with the doors or lids open,
is brought to the ambient specified temperature ±2 K.

– 12 – 60335-2-89  IEC:2010+A1:2012

Other tests are performed at an ambient temperature of 20 °C ± 5 °C.

Appliances classified for several climatic classes are tested at the ambient temperature

relevant to the highest climatic class.

NOTE 101 Steady conditions are considered to be established when three successive readings of the

temperature, taken at approximately 60 min intervals, at the same point of any operating cycle, do not differ by

more than 1 K.
5.10 Addition:
For the tests of 22.107, 22.108 and 22.109, the appliance is empty and installed as follows.
Built-in appliances are installed in accordance with the instructions for installation.
Other appliances are placed in a test enclosure, the walls of which enclose the appliance as
closely as possible to all its sides and top surface, unless the manufacturer indicates in the
instructions for installation that a free distance shall be observed from the walls or the ceiling,
in which case this distance is observed during the test.
5.101 Appliances which use flammable refrigerants and which, according to the
instructions, may be used with other electrical appliances inside a food storage compartment,
are tested with such recommended appliances incorporated and in operation as they would be
in normal use.
NOTE Examples of such electrical appliances are ice-cream makers and deodorizers.
6 Classification
This clause of Part 1 is applicable except as follows.
6.101 Refrigerated display and storage cabinets shall be at least one of the following
climatic classes:
– appliance of class 0;
– appliance of class 1;
– appliance of class 2;
– appliance of class 3;
– appliance of class 4;
– appliance of class 5;
– appliance of class 6;
– appliance of class 7;
– appliance of class 8.
Compliance is checked by inspection.
NOTE The climatic classes are specified in ISO 23953-2.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.

60335-2-89  IEC:2010+A1:2012 – 13 –

7.1 Modification:
Replace the third dash by:
– rated current, in amperes;
Addition:
– the power input, in watts, of heating systems, if greater than 100 W;

– the defrosting power input, in watts, if the current corresponding to the defrosting power

input is greater than the rated current of the appliance;

– one or more of the numerals; 0, 1, 2, 3, 4, 5, 6, 7 or 8, indicating the climatic class of the
appliance;
– for incandescent lamps, the maximum rated wattage of the lamp, in watts;
– for discharge lamps, the rated wattage of the lamp, in watts;
– the total mass of refrigerant for each separate refrigerant circuit;
– for a single component refrigerant, at least one of the following:
• the chemical name,
• the chemical formula,
• the refrigerant number;
– for a blended refrigerant, at least one of the following:
• the chemical name and nominal proportion of each of its components,
• the chemical formula and nominal proportion of each of its components,
• the refrigerant number and nominal proportion of each of its components,
• the refrigerant number of the refrigerant blend.
– the chemical name or refrigerant number of the principal component of the insulation
blowing gas.
Refrigerent numbers shall be quoted in accordance with ISO 817.
NOTE 101 Pipe insulation or small items of insulation are not required to be marked.
Appliances which use flammable refrigerants shall be marked with the symbol “Caution: risk
of fire”.
Appliances employing R-744 in a transcritical refrigeration system shall be marked with the
substance of the following:
WARNING: System contains refrigerant under high pressure. Do not tamper with the
system. It must be serviced by qualified persons only.
Appliances employing R-744 in a transcritical refrigeration system shall be marked with
symbol ISO 7000-1701 (2004-01).
Appliances without automatic liquid-level control and which are intended to be connected to
the water supply mains or to be filled with liquid by the user shall be marked with the
maximum liquid level.
– 14 – 60335-2-89  IEC:2010+A1:2012

7.6 Addition:
Symbol ISO 3864-B.3.2 Caution: risk of fire

Symbol ISO 7010 W021      Warning; Risk of fire / flammable

materials
Symbol ISO 7000-1701 (2004-01) Pressure

NOTE The rules for warning signs in ISO 3864-1 apply to the colour and shape of the symbol Caution: risk of fire.
7.12 Modification:
The instructions concerning persons (including children) with reduced physical, sensory or
mental capabilities, or lack of experience and knowledge and children playing with the
appliance are not required.
Addition:
The instructions shall contain information regarding the maximum loading of each type of
shelf.
The instructions shall state the substance of the following.
Do not store explosive substances such as aerosol cans with a flammable propellant in
this appliance.
If symbol ISO 7000-1701 (2004-01) is used, its meaning shall be explained.
For appliances which use flammable refrigerants, the instructions shall include information

pertaining to the handling, servicing and disposal of the appliance.
The instructions for appliances which use flammable refrigerants shall include the substance
of the following warnings:
– WARNING: Keep clear of obstruction all ventilation openings in the appliance
enclosure or in the structure for building-in.
– WARNING: Do not use mechanical devices or other means to accelerate the
defrosting process, other than those recommended by the manufacturer.
– WARNING:  Do not damage the refrigerant circuit.
NOTE 101 This warning is only applicable for appliances with refrigerating circuits which are accessible by the
user.
– WARNING: Do not use electrical appliances inside the food storage compartments of
the appliance, unless they are of the type recommended by the
manufacturer.
60335-2-89  IEC:2010+A1:2012 – 15 –

For appliances which use flammable insulation blowing gases, the instructions shall include

information regarding disposal of the appliance.

For appliances provided with double-capped fluorescent lamps, the instructions shall include

the information that lamps have to be replaced by identical lamps only.

An explanation shall be given of the meaning of the alpha-numeric characters, indicating the

climatic class of the appliance, that are marked on the appliance.

The instructions for split-systems that use a flammable refrigerant shall include the

substance of the following warning.

WARNING: In order to reduce flammability hazards the installation of this appliance must
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