ISO/TS 21364-21:2021
(Main)Domestic gas cooking appliances — Safety — Part 21: Particular requirements for gas hobs, gas grills and gas griddles
Domestic gas cooking appliances — Safety — Part 21: Particular requirements for gas hobs, gas grills and gas griddles
This document specifies particular requirements for safety, construction and materials of household gas surface cooking appliances. For general requirements for safety, construction and materials of gas hobs, see ISO/TS 21364-1:2021. This document covers the following: — surface cooking appliances: — hobs; — surface grills; — griddles; being built-in, part of a cooking appliance or table top; — hobs accessories. It does not cover surface cooking appliances intended for outdoor use and/or commercial use as well as electrical heated elements as part of the appliance. It also does not cover appliances with automatic burner control systems. NOTE 1 For requirements of electrical safety refer to the IEC 60335 standard series. NOTE 2 Attention is drawn to the fact that — for appliances intended to be used in vehicles or on board of ships or aircrafts, additional requirements could be necessary; — in many countries additional requirements are specified by the national health authorities, the national water supply authorities and similar authorities. This document does not cover requirements relating to gas cylinders, their pressure regulators and their connections. This document does not cover requirements for gas installation.
Appareils de cuisson domestiques utilisant les combustibles gazeux — Sécurité — Partie 21: Exigences particulières pour les tables de cuisson à gaz, grils à gaz et grils par contact à gaz
Le présente document spécifie des exigences particulières relatives à la sécurité, à la construction et aux matériaux des appareils de cuisson domestiques de surface utilisant les combustibles gazeux. Pour les exigences générales de sécurité, de construction et de matériaux des tables de cuisson à gaz, la norme l'ISO/TS 21364-1:2021 s’applique. Le présent document couvre les éléments suivants: — appareils de cuisson de surface: — tables de cuisson; — grils de surface; — grils par contact; encastrés, faisant partie d’un appareil de cuisson ou à poser sur table; — accessoires de table de cuisson. Toutefois, il ne couvre pas les appareils de cuisson de surface destinés à une utilisation en extérieur et/ou commerciale, ainsi que les éléments chauffés électriquement faisant partie de l’appareil. Il ne couvre pas non plus les appareils avec systèmes automatiques de commande de brûleur. NOTE 1 Pour les exigences relatives à la sécurité électrique, se référer aux normes IEC. NOTE 2 L'attention est attirée sur le fait que: — pour les appareils destinés à une utilisation dans des véhicules ou à bord de bateaux ou aéronefs, des exigences supplémentaires peuvent être nécessaires; — dans de nombreux pays, des exigences supplémentaires sont spécifiées par les autorités sanitaires nationales, les services nationaux de distribution d’eau et les autorités similaires. Le présent document ne couvre pas les exigences relatives aux bouteilles à gaz, à leurs régulateurs de pression ou à leurs raccords. Le présent document ne couvre pas les exigences relatives à l’installation de gaz.
Plinski kuhalni aparati za gospodinjstvo - Varnost - 21. del: Posebne zahteve za plinske kuhalne plošče, plinske žare in plinske žare z rešetko
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TECHNICAL ISO/TS
SPECIFICATION 21364-21
First edition
2021-05
Domestic gas cooking appliances —
Safety —
Part 21:
Particular requirements for gas hobs,
gas grills and gas griddles
Appareils de cuisson domestiques utilisant les combustibles gazeux —
Sécurité —
Partie 21: Exigences particulières pour les tables de cuisson à gaz,
grils à gaz et grils par contact à gaz
Reference number
©
ISO 2021
© ISO 2021
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ii © ISO 2021 – All rights reserved
Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
3.1 Definitions relating to components . 2
4 Components in gas cooking appliances . 2
4.1 General . 2
4.2 Manual gas shut-off valves (Taps) . 2
4.2.1 Taps for multi-ring burners . 3
4.3 Knobs . 3
4.3.1 Design of knobs . 3
4.4 Multifunctional controls . 3
4.5 Thermoelectric flame supervision controls . 3
4.6 Thermostats . 3
4.7 Pressure regulators . 3
4.8 Automatic shut-off valves . 3
4.9 Injectors and adjusters . 3
4.10 Ignition systems . 3
4.11 Thermal cut-outs . 3
4.12 Multi-ring burners . 3
4.13 Overheating safety devices . 4
4.13.1 Requirement . 4
4.13.2 Test . 5
5 General conditions of test . 5
6 Heat input . 5
6.1 General . 5
6.2 Obtaining the nominal heat input . . 5
6.2.1 Test of hob burner . 5
6.2.2 Test of multi-ring hob burner . 6
6.2.3 Test of surface grill and griddle without a thermostat . 6
6.2.4 Test of surface grill and griddle with a thermostat . 6
6.3 Measurements and calculations . 6
6.4 Obtaining the reduced heat input . 6
6.4.1 Requirement . 6
6.4.2 Test . 6
6.4.3 Test of hob burner, surface grill and griddle burner . 6
6.5 Total heat input . 7
7 Heating . 7
7.1 General . 7
7.2 Operating conditions . 7
7.3 Heating tests. 7
7.4 Abnormal operation . 7
7.4.1 Hob burner . 7
7.4.2 Gas griddles . 7
8 Combustion . 8
8.1 Measurement of all burners simultaneously . 8
8.2 Blocked combustion products outlet . 8
8.3 Analysis of the combustion products . 8
8.4 Single burner . 8
8.4.1 General requirement . 8
8.4.2 Hob burner, surface grill burner and griddle burner . 8
8.4.3 Tests of multi-ring burner . .10
8.4.4 Additional test of Type II and Type V multi-ring burners .10
8.4.5 Sampling the combustion products .10
8.5 Sooting .13
8.5.1 Requirement .13
8.5.2 Test .13
9 Ignition, cross-lighting and flame stability .14
9.1 General .14
9.2 Movement of oven/grill door or cabinet door .14
9.3 Hob burner, surface grill burner and griddle burner .14
9.3.1 General.14
9.3.2 Cold conditions .14
9.3.3 Hot conditions .15
9.4 Multi-ring hob burner .16
9.4.1 Requirement .16
9.4.2 Additional test for Type I multi-ring burners .16
9.4.3 Additional test for Type II and Type V multi-ring burners.16
9.4.4 Resistance to draught .16
10 Accumulation of unburnt gas and leak tightness .17
11 Construction .17
11.1 General .18
11.2 Materials .18
11.2.1 General.18
11.2.2 Burner material test . .18
11.2.3 Sealings .18
11.2.4 Resistance for non-metallic feet of pan supports .18
11.3 Gas inlet connections .18
11.4 Conversion to different gases .18
11.5 Pull forces of knobs for manual gas shut-off valves (taps) . .18
11.6 Appliances that enable the user to program the start or the end of the cooking cycle .18
11.7 Compartment for one gas cylinder .18
11.8 Touch controls .18
11.8.1 Requirement .19
11.8.2 Test .19
11.9 Resistance to spillage .19
11.9.1 Requirement .19
11.9.2 Test .19
11.10 Specific hob parts and hob accessories .19
11.10.1 Pan supports .19
11.10.2 Removable devices for small pans .20
11.10.3 Special supports for convex-based pans .20
11.10.4 Covered burners .20
11.11 Shut down lids .21
11.11.1 Requirement .21
11.11.2 Test .21
11.11.3 Glass shut down lids .21
11.11.4 Shut-off device .21
12 Mechanical strength .21
12.1 Parts made of glass and glass-ceramic .21
12.1.1 General.22
12.1.2 Spring hammer test .22
12.1.3 Punch test.22
12.1.4 Thermal stress resistance for glass and glass-ceramic hob surfaces .22
12.2 Pan support .22
12.2.1 Requirement .22
iv © ISO 2021 – All rights reserved
12.2.2 Test .22
12.3 Pan support in contact with the glass or glass ceramic of the hob .22
13 Electrical safety .22
14 Marking and instructions .22
Annex A (informative) National deviations in various countries .23
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 291, Domestic gas cooking appliances.
A list of all parts in the ISO 21364 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
vi © ISO 2021 – All rights reserved
Introduction
This document provides general requirements for safety of domestic gas cooking appliances.
This document can also be applied, so far as is reasonable, to appliances not mentioned in this
specific document and to appliances designed on the basis of new principles, in which case additional
requirements may be necessary.
Where no specific International Standard for an appliance exists, the appliance can be tested according
to this document and further tests which take into account the intended use.
Gas burning appliances using fuel gases need to withstand the type of gas which is specified. Other ISO
technical committees, e.g. ISO/TC 193, Natural gas, deal with the testing and properties of fuel gases.
Note that, due to the differing properties of fuel gas depending on its source/region of origin, certain
differences in regulations exist at present in different regions; some of these differences are presented
in Annex A.
This document covers type testing.
This document series is structured as follows:
ISO 21364 Domestic gas cooking appliances – Safety
— Part 1: General requirements
— Part 21: Particular requirements for hobs, surface grills and griddles
— Part 22: Particular requirements for ovens and compartment grills
This document of ISO 21364 is designed to be used in combination with ISO/TS 21364-1. Together, they
establish the full requirements as they apply to the product covered by this document. Where needed,
this document adapts ISO/TS 21364-1 by stating in the corresponding clause:
— “with the following modification”;
— “with the following addition”;
— “is replaced by the following”;
or
— “is not applicable”.
In order to identify specific requirements that are particular to this document, that are not already
covered by ISO/TS 21364-1, this document may contain clauses or subclauses that are additional to the
structure of ISO/TS 21364-1.
To ensure global relevance of this document, the differing requirements resulting from practical
experience and installation practices in various regions of the world have been taken into account. The
variations in basic infrastructure associated with appliances have also been recognized, some of which
are addressed in ISO/TS 21364-1:2021, Annex E and ISO/TS 21364-1:2021, Annex A. This document
intends to provide a basic framework of requirements that recognize these differences.
TECHNICAL SPECIFICATION ISO/TS 21364-21:2021(E)
Domestic gas cooking appliances — Safety —
Part 21:
Particular requirements for gas hobs, gas grills and gas
griddles
1 Scope
This document specifies particular requirements for safety, construction and materials of household
gas surface cooking appliances. For general requirements for safety, construction and materials of gas
hobs, see ISO/TS 21364-1:2021.
This document covers the following:
— surface cooking appliances:
— hobs;
— surface grills;
— griddles;
being built-in, part of a cooking appliance or table top;
— hobs accessories.
It does not cover surface cooking appliances intended for outdoor use and/or commercial use as well
as electrical heated elements as part of the appliance. It also does not cover appliances with automatic
burner control systems.
NOTE 1 For requirements of electrical safety refer to the IEC 60335 standard series.
NOTE 2 Attention is drawn to the fact that
— for appliances intended to be used in vehicles or on board of ships or aircrafts, additional requirements could
be necessary;
— in many countries additional requirements are specified by the national health authorities, the national
water supply authorities and similar authorities.
This document does not cover requirements relating to gas cylinders, their pressure regulators and
their connections.
This document does not cover requirements for gas installation.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO/TS 21364-1:2021, Domestic gas cooking appliances – Safety- Part 1: General requirements
ISO 23551-8:2016+A1: 2019, Safety and control devices for gas burners and gas-burning appliances —
Particular requirements — Part 8: Multifunctional controls
IEC 60730-2-9:2015+A1: 2018, Automatic electrical controls for household and similar use — Part 2-9:
Particular requirements for temperature sensing controls
3 Terms and definitions
For the purposes of this document, the terms and definitions of ISO/TS 21364-1:2021 apply with the
following additions.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1 Definitions relating to components
3.1.1
open burner
hob burner with the flame in direct contact with the pan
3.1.2
multi-ring burner
hob burner assembly having two or more rings of burner ports
Note 1 to entry: The term ring includes any distribution of burner ports around the central axis of the burner.
Note 2 to entry: A detailed description of the different types of multi-ring burners and their operating modes is
given in Table 1.
3.1.3
multi-ring burner with sectional control
multi-ring burner (3.1.2) that is so designed that one or more of its rings of burner ports can be utilised
independently
3.1.4
multi-ring burner with simple control
multi-ring burner (3.1.2) that is so designed that its rings of burner ports cannot be utilised independently
3.1.5
overheating safety device
temperature sensing device which is intended to keep temperature below one particular value during
abnormal operating conditions of the appliance and which has no provision for setting by the end user
Note 1 to entry: These devices usually use a thermistor or a bimetal sensing part (element).
[SOURCE: ISO 23551 8:2016+A1: 2019, Annex B]
4 Components in gas cooking appliances
Clause 4 of ISO/TS 21364-1:2021 applies, with the following additions.
4.1 General
Clause 4.1 of ISO/TS 21364-1:2021 applies.
4.2 Manual gas shut-off valves (Taps)
ISO/TS 21364-1:2021, 4.2 applies with the following additions.
2 © ISO 2021 – All rights reserved
4.2.1 Taps for multi-ring burners
The “off” position of a single sectional control with two closing directions for multi-ring hob burners
shall be designed to make it impossible for the tap knob to be inadvertently moved from one adjustment
range to another. However, if each ring of such multi-sectional hob burner is supervised by a flame
supervision device, the single sectional control shall stop in its “off” position.
4.3 Knobs
ISO/TS 21364-1:2021, 4.3 applies with the following additions.
4.3.1 Design of knobs
ISO/TS 21364-1:2021, 4.3.1 applies with the following additions.
4.3.1.1 Multi-ring burner knobs
If the control knob operates by turning, the closing direction shall only be clockwise. This does not
apply to multi-ring hob burners with a single sectional control and two closing directions.
4.4 Multifunctional controls
ISO/TS 21364-1:2021, 4.4 applies.
4.5 Thermoelectric flame supervision controls
ISO/TS 21364-1:2021, 4.5 applies.
4.6 Thermostats
ISO/TS 21364-1:2021, 4.6 applies.
4.7 Pressure regulators
ISO/TS 21364-1:2021, 4.7 applies.
4.8 Automatic shut-off valves
ISO/TS 21364-1:2021, 4.8 applies.
4.9 Injectors and adjusters
ISO/TS 21364-1:2021, 4.9 applies.
4.10 Ignition systems
ISO/TS 21364-1:2021, 4.10 applies.
4.11 Thermal cut-outs
ISO/TS 21364-1:2021, 4.11 applies.
4.12 Multi-ring burners
Table 1 shows examples of multi-ring burners and their operating modes.
Table 1 — Examples of types of multi-ring burners and their operating modes
Key
1 Inner Burner-ring 5 Gas supply
2 Outer Burner-ring 6 Connection to FSD
3 Flame supervision sensor 7 Alternative connection to FSD
4 Burner control (tap)
FSD at inner or outer FSD at inner or outer FSD at inner and FSD at inner and FSD at inner or
burner ring burner ring outer burner ring outer burner ring outer burner ring
Type I Type II Type III Type IV Type V
Simple control Sectional control Sectional control Two single burners Sectional control
with two turning with two turning
directions directions
Multi-ring burner that Multi-ring burner that Multi-ring burner Multi-ring burner Multi-ring burner
is so designed that its is so designed that one that is so designed that is so designed that is designed
rings of burner ports or more of its rings of that one or more of that it has two or so that it has two
cannot be utilized inde- burner ports can be its rings of burner more taps each turning directions.
pendently, controlled utilized independent- ports can be uti- with one outlet for One direction is
by a tap with one outlet ly, controlled by a lized independently, separate supply of for utilizing one
for common supply of tap with two or more controlled by a tap the burner rings burner ring. The
all burner rings with outlets for separate with two or more and same turning other direction
one turning direction. supply of the burner outlets for separate direction. is to utilize both
rings with one turning supply of the burner burner rings.
direction. rings with two
turning directions.
The two rings
cannot be operated
together.
4.13 Overheating safety devices
4.13.1 Requirement
An overheating safety device, if any, shall conform with the requirements in ISO 23551-8:2016+A1:
2019, Annex B.
Electrical safety requirements for the overheating safety device shall be according to
I EC 6 0730 -2-9:2015+A 1: 2018 + A 2: 2020 .
4 © ISO 2021 – All rights reserved
An overheating safety device for a gas hob shall be as follows:
a) when tested according 4.13.2, the overheating safety device (OSD) shall prevent that the oil
temperature exceeds 300 °C;
b) when the thermal sensing part is damaged, the gas passage to the burner shall be closed and shall
not be reopened automatically;
c) for circuit failure or short-circuit, the gas passage to the burner shall be closed and shall not be
reopened automatically;
d) the temperature sensing part of the OSD shall be secured firmly, in a way that it cannot be easily
moved to a wrong position;
e) the overheating safety device shall have a structure in which it cannot be easily altered;
NOTE If a special tool or dedicated terminal is used this requirement is deemed to be fulfilled.
f) after applying a load according to 12.2 to a cooking appliance, the temperature sensing part shall
normally operate.
4.13.2 Test
Select test pan according to ISO/TS 21364-1:2021, Table 1. Fill the pan with unused cooking oil to a
depth of 10 mm.
A thermocouple is placed in the centre of the oil volume.
Use reference gas at normal pressure.
Operate the burner at nominal heat input. Measure the highest temperature of oil as the overheating
safety device is functioning.
5 General conditions of test
Clause 5 of ISO/TS 21364-1:2021 apply.
6 Heat input
Clause 6 of ISO/TS 21364-1:2021 applies with the following additions.
6.1 General
ISO/TS 21364-1:2021, 6.1 applies.
6.2 Obtaining the nominal heat input
ISO/TS 21364-1:2021, 6.2 applies, with the following additions.
6.2.1 Test of hob burner
The measurements are taken with the burner operating under the following conditions:
— a pan is placed on an open burner in accordance with ISO/TS 21364-1:2021, 5.7 without a lid and
filled with water to a level of (50 ± 2) mm above the bottom of the pan;
— with the appliance at ambient temperature, the burner is ignited and operated at full rate at normal
pressure for 10 min;
— measurement starts at the end of the tenth minute and finishes at the latest at the end of the
thirteenth minute, with a minimum measurement time of one minute or when the highest number
of complete revolutions of the meter have been made before the end of the thirteenth minute. For
analogue meters, the measurement shall be taken over at least one complete revolution.
Then the heat input is calculated under reference conditions according to ISO/TS 21364-1:2021, 6.3.
6.2.2 Test of multi-ring hob burner
All burner rings are measured according to 6.2.1 when operated together. Multi-ring burners with
separate controls for each burner ring (Type IV, see 4.12) are measured separately.
6.2.3 Test of surface grill and griddle without a thermostat
The burner of a surface grill and a griddle without a thermostat is tested under the following conditions:
— surface grills and griddles are tested without a pan;
— with the appliance at ambient temperature, the burner is ignited and operated at full rate at normal
pressure for 10 min;
— measurement starts at the end of the tenth minute and finishes at the latest at the end of the
thirteenth minute, with a minimum measurement time of one minute or when the highest number
of complete revolutions of the meter have been made before the end of the thirteenth minute. For
analogue meters, the measurement shall be taken over at least one complete revolution.
Then the heat input is calculated under reference conditions according to ISO/TS 21364-1:2021, 6.3.
6.2.4 Test of surface grill and griddle with a thermostat
Surface grills and griddles are tested without a pan. Measuring begins from ignition, with the thermostat
or control device at full rate and terminates at the end of the fifth minute or when the highest number of
complete revolutions of the analogue meter have been made before the end of the fifth minute. The test
shall be finished before the thermostat starts cycling.
Then the heat input is calculated under reference conditions according to ISO/TS 21364-1:2021, 6.3.
6.3 Measurements and calculations
ISO/TS 21364-1:2021, 6.3 applies.
6.4 Obtaining the reduced heat input
ISO/TS 21364-1:2021, 6.4 applies with the following additions.
6.4.1 Requirement
ISO/TS 21364-1:2021, 6.4.1 applies.
6.4.2 Test
ISO/TS 21364-1:2021, 6.4.2 applies.
6.4.3 Test of hob burner, surface grill and griddle burner
The reduced heat input shall be measured after the nominal heat input according to ISO/TS 21364-1:2021,
6.4.
6 © ISO 2021 – All rights reserved
6.5 Total heat input
ISO/TS 21364-1:2021, 6.5 applies.
7 Heating
Clause 7 of ISO/TS 21364-1:2021 applies with the following additions.
7.1 General
ISO/TS 21364-1:2021, 7.1 applies.
7.2 Operating conditions
ISO/TS 21364-1:2021, 7.2 applies.
7.3 Heating tests
ISO/TS 21364-1:2021, 7.3 applies.
7.4 Abnormal operation
ISO/TS 21364-1:2021, 7.4 applies with the following additions.
7.4.1 Hob burner
7.4.1.1 Requirement
During the following test, the temperature rise shall not exceed the values specified in
ISO/TS 21364-1:2021, 7.4, Table 5.
7.4.1.2 Test
Pans with the biggest diameter allowed in the instruction for use and maintenance are placed according
ISO/TS 21364-1:2021, 7.3.2.2. If no maximum pan size is given in the instructions for use, use a pan
with a diameter 60 mm bigger than the one given in ISO/TS 21364-1:2021, 5.7, Table 1. The pans are
placed on each hob burner and electric cooking plate, starting with the special pans. No pan shall
overlap the edges of the hob. A distance of at least 10 mm shall be provided between the side surface of
each pan and all other pans. If this arrangement is not possible, pans with a smaller diameter according
to ISO/TS 21364-1:2021, 5.7, Table 2 are used.
During the test, the pans are used with lids. Hot water is added to ensure that water is always present
in the pans.
All hob burners are operated for 1 h or up to steady conditions, whichever is shorter, with one of the
reference gases (according to the corresponding Table of ISO/TS 21364-1:2021, Annex A) at nominal
heat input with normal pressure, their control being at full rate.
NOTE Steady conditions are deemed to have been achieved when the measured temperatures do not vary by
more than 1 K in 15 min.
7.4.2 Gas griddles
7.4.2.1 Requirement
During the following test, the temperature rise shall not exceed the values specified in
ISO/TS 21364-1:2021, 7.4, Table 5.
7.4.2.2 Test
Griddles are operated without a pan for 1 h or up to steady conditions, whatever is shorter, with one of
the reference gases at nominal heat input, their control being at full rate.
8 Combustion
Clause 8 of ISO/TS 21364-1:2021 applies, with the following additions.
8.1 Measurement of all burners simultaneously
ISO/TS 21364-1:2021, 8.1 applies.
8.2 Blocked combustion products outlet
ISO/TS 21364-1:2021, 8.2 applies.
8.3 Analysis of the combustion products
ISO/TS 21364-1:2021, 8.3 applies.
8.4 Single burner
8.4.1 General requirement
Under the conditions described below, the CO concentration in the air-free- and dry combustion
products for each of the burners shall not exceed:
— 0,10 % for Test no. 1;
— 0,15 % for Tests no. 2 and 3;
— 0,20 % for Test no. 4.
Burners or burner sections having a maximum heat input less than 600 W are not subjected to
combustion testing.
The requirements are verified in the course of the tests given in Table 2.
8.4.2 Hob burner, surface grill burner and griddle burner
8.4.2.1 General
The appliance shall be installed according to ISO/TS 21364-1:2021, 5.6, but without the horizontal
wooden panel or range hood above the appliance. An additional panel is installed on that side of the
appliance where the burner with the highest heat input is located, or whichever side results in the
worst-case test condition. Any gaps allowing air to pass through between the side panel and the back
panel are sealed with adhesive tape.
Each of the burners shall be operated individually and shall be previously adjusted to its nominal heat
input.
8 © ISO 2021 – All rights reserved
Table 2 — Conditions and limits for combustion tests
Test no. Burners in op- Gas used Heat input rate Test pressure Maximum CO
eration concentration
% / Vol
1 Each burner indi- Each reference Full rate p 0,10
max
vidually gas
2 Each burner indi- Each reference ½ nominal heat p 0,15
n
vidually gas input
3 Each burner indi- Limit gas for Full rate p 0,15
max
vidually incomplete com-
b
bustion
4 Each burner indi- One of the refer- Full rate p 0,20
n
a
vidually ence gases
a
The reference gas giving the highest CO concentration in Test no. 1.
b
Test no. 3 is only applicable, if in ISO/TS 21364-1:2021, Annex A a limit gas for incomplete combustion is specified.
Tests no. 1, 2 and 3 shall be carried out both with and without the special support for small pans, if this
special support is specified in the instructions for use and maintenance.
In case the appliance is delivered with other special supports the appliance shall be tested according to
the use described for these supports in the instruction for use and maintenance.
Test no. 4 is only carried out when the appliance has a mains electricity supply. Any special support for
small pans is not used.
8.4.2.2 Tests
8.4.2.2.1 Test number 1
For appliances that have no pressure regulator, or for appliances fitted with this device where their
function has been annulled, the test pressure is the maximum pressure of the test gas used. Test
gases and pressures
...
SPÉCIFICATION ISO/TS
TECHNIQUE 21364-21
Première édition
2021-05
Appareils de cuisson domestiques
utilisant les combustibles gazeux —
Sécurité —
Partie 21:
Exigences particulières pour les tables
de cuisson à gaz, grils à gaz et grils par
contact à gaz
Domestic gas cooking appliances — Safety —
Part 21: Particular requirements for gas hobs, gas grills and gas
griddles
Numéro de référence
©
ISO 2021
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2021
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ii © ISO 2021 – Tous droits réservés
Sommaire Page
Avant-propos .vi
Introduction .vii
1 Domaine d'application . 1
2 Références normatives . 1
3 Termes et définitions . 2
3.1 Définitions relatives aux composants . 2
4 Composants des appareils de cuisson utilisant les combustibles gazeux .2
4.1 Généralités . 3
4.2 Robinets manuels de sectionnement de gaz . 3
4.2.1 Robinets pour brûleurs multicouronnes . 3
4.3 Manettes . 3
4.3.1 Conception des manettes . 3
4.4 Équipements multifonctionnels . 3
4.5 Équipements thermoélectriques de surveillance de flamme . 3
4.6 Thermostats . 3
4.7 Régulateurs de pression. 3
4.8 Robinets automatiques de sectionnement . 3
4.9 Injecteurs et organes de préréglage . 3
4.10 Systèmes d’allumage . 3
4.11 Dispositifs de coupure thermique . 4
4.12 Brûleurs multicouronnes . 4
4.13 Dispositifs anti-surchauffe . 5
4.13.1 Exigence. 5
4.13.2 Essai . 5
5 Conditions générales d'essai . 6
6 Débit calorifique . 6
6.1 Généralités . 6
6.2 Obtenir le débit calorifique nominal . 6
6.2.1 Mise à l’essai d’un brûleur de table de cuisson . 6
6.2.2 Mise à l’essai d’un brûleur multicouronnes . 6
6.2.3 Mise à l’essai d’un gril de surface et d’un gril par contact sans thermostat . 6
6.2.4 Mise à l’essai d’un gril de surface et d’un gril par contact avec thermostat . 7
6.3 Mesures et calculs . 7
6.4 Obtenir le débit calorifique réduit . 7
6.4.1 Exigence. 7
6.4.2 Essai . 7
6.4.3 Mise à l’essai d’un brûleur de table de cuisson, d’un gril de surface et d’un
brûleur de gril par contact . 7
6.5 Débit calorique total . 7
7 Échauffement . 7
7.1 Généralités . 7
7.2 Conditions de fonctionnement . 7
7.3 Essais d’échauffement . 7
7.4 Fonctionnement anormal . 8
7.4.1 Brûleur de table de cuisson . 8
7.4.2 Grils de surface et grils par contact à gaz . 8
8 Combustion . 8
8.1 Mesurage de tous les brûleurs fonctionnant simultanément . 8
8.2 Orifice de sortie des produits de combustion bloqué . 9
8.3 Analyse des produits de combustion . 9
8.4 Brûleur seul . 9
8.4.1 Exigences générales . 9
8.4.2 Mise à l’essai d’un brûleur de table de cuisson, d’un brûleur de gril de
surface et d’un brûleur de gril par contact . 9
8.4.3 Mise à l’essai d’un brûleur multicouronnes .10
8.4.4 Essai supplémentaire des brûleurs multicouronnes de type II et V .11
8.4.5 Prélèvement des produits de combustion .11
8.5 Charbonnement.14
8.5.1 Exigence.14
8.5.2 Essais.14
9 Allumage, interallumage, stabilité des flammes .15
9.1 Généralités .15
9.2 Mouvement de la porte du four/gril ou de la porte du meuble .15
9.3 Brûleur de table de cuisson, brûleur de gril de surface et brûleur de gril par contact .15
9.3.1 Généralités .15
9.3.2 Essais à froid .15
9.3.3 Essais à chaud . . .16
9.4 Brûleur multicouronnes de table de cuisson .17
9.4.1 Exigence.17
9.4.2 Essais supplémentaires du type I .17
9.4.3 Essais supplémentaires des types II et V .17
9.4.4 Résistance aux courants d'air .18
10 Accumulation de gaz non brûlés et étanchéité .19
11 Construction .19
11.1 Généralités .19
11.2 Matériaux .20
11.2.1 Généralités .20
11.2.2 Mise à l’essai du matériau des brûleurs .20
11.2.3 Joints .20
11.2.4 Résistance des pieds non métalliques de la grille-support .20
11.3 Raccord d'alimentation de gaz .20
11.4 Adaptation aux différents gaz .20
11.5 Forces de traction des manettes pour les robinets manuels de sectionnement de gaz .20
11.6 Appareils permettant à l’utilisateur de programmer le démarrage ou la fin du cycle
de cuisson .20
11.7 Logement pour une bouteille de gaz .20
11.8 Touches sensitives .20
11.8.1 Exigence.20
11.8.2 Essai .21
11.9 Débordement .21
11.9.1 Exigence.21
11.9.2 Essais.21
11.10 Pièces spécifiques aux tables de cuisson et accessoires de table de cuisson .21
11.10.1 Grilles-support .21
11.10.2 Supports spéciaux amovibles pour petits récipients .22
11.10.3 Supports spéciaux pour récipients à fond convexe .22
11.10.4 Brûleurs couverts .22
11.11 Couvercles-dosserets .23
11.11.1 Exigence.23
11.11.2 Essais.23
11.11.3 Couvercles-dosserets en verre .23
11.11.4 Organe de coupure .23
12 Résistance mécanique .23
12.1 Verre et vitrocéramique .24
12.1.1 Généralités .24
12.1.2 Essais au marteau à ressort .24
12.1.3 Essais au poinçon .24
iv © ISO 2021 – Tous droits réservés
12.1.4 Résistance aux contraintes thermiques pour les surfaces de table de
cuisson en verre et vitrocéramique .24
12.2 Grilles-support .24
12.2.1 Exigence.24
12.2.2 Essai .24
12.3 Grilles support en contact avec les surfaces de table de cuisson en verre ou en
vitrocéramique .24
13 Sécurité électrique .25
14 Marquage et instructions .25
Annexe A (informative) Divergences nationales pour divers pays.26
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes
nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est
en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.
L'ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document a été
rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir www
.iso .org/ directives).
L'attention est attirée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable
de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant
les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de
l'élaboration du document sont indiqués dans l'Introduction et/ou dans la liste des déclarations de
brevets reçues par l'ISO (voir www .iso .org/ brevets).
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l'intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion
de l'ISO aux principes de l'Organisation mondiale du commerce (OMC) concernant les obstacles
techniques au commerce (OTC), voir le lien suivant: www .iso .org/ iso/ fr/ avant -propos.
Le présent document a été élaboré par le comité technique ISO/TC 291, Appareils de cuisson domestiques
utilisant les combustibles gazeux.
Une liste de toutes les parties de la série ISO 21364 se trouve sur le site web de l'ISO.
Tout commentaire ou toute question sur ce document doit être adressé à l’organisme national de
normalisation de l’utilisateur. Une liste complète de ces organismes est disponible sur www .iso .org/
members .html.
vi © ISO 2021 – Tous droits réservés
Introduction
Le présent document fournit des exigences générales pour la sécurité des appareils de cuisson
domestiques utilisant des combustibles gazeux.
Le présent document peut aussi être appliqué, dans la mesure du raisonnable, à des appareils non
traités par cette norme particulière et à des appareils conçus sur la base de principes nouveaux, auquel
cas des exigences supplémentaires peuvent être nécessaires.
Lorsqu’il n’existe pas de Norme internationale spécifique pour un appareil, celui-ci peut être soumis à
essai conformément à la présente Norme internationale et à des essais complémentaires tenant compte
de l’usage auquel il est destiné.
Les appareils à gaz utilisant des combustibles gazeux doivent supporter le type de gaz spécifié. D’autres
comités techniques de l’ISO, par exemple l’ISO/TC 193, gaz naturel, traitent des essais et des propriétés
des gaz combustibles.
Il convient de noter qu'en raison des changements de propriétés du gaz combustible en fonction de sa
source/région d'origine, il existe actuellement certaines différences entre les réglementations dans
différentes régions; certaines de ces différences sont présentées à l’Annexe A.
Le présent document couvre les essais de type.
La présente série de document est structurée de la manière suivante:
ISO 21364, Appareils de cuisson domestiques utilisant les combustibles gazeux — Sécurité
— Partie 1: Exigences générales;
— Partie 21: Règles particulières pour les tables de cuisson à gaz, grils à gaz et grils par contact à gaz;
— Partie 22: Exigences particulières pour les fours et compartiments de grillage.
Le présent document doit être utilisée conjointement avec l' ISO/TS 21364-1:2021.
Le présent document de l’ISO 21364 est prévu d’être utilisé conjointement avec l’ISO/TS 21364-1:2021.
Ensemble, ils établissent l’ensemble des exigences qui s'applique au produit couvert par ce document.
Le cas échéant, ce document adapte l'ISO/TS 21364-1:2021 en indiquant dans l'article correspondant:
— «avec la modification suivante»;
— «avec l'ajout suivant»;
— «est remplacé par»;
ou
— «n'est pas applicable».
Afin d'identifier les exigences spécifiques qui sont particulières au présent document, qui ne sont
pas déjà couvertes par l'ISO/TS 21364-1:2021, ce document peut contenir des paragraphes ou sous-
paragraphe qui s'ajoutent à la structure de l'ISO/TS 21364-1:2021.
Pour assurer la pertinence globale de ce document, les exigences différentes résultant de l'expérience
pratique et des pratiques d'installation dans diverses régions du monde ont été prises en compte.
Les variations de l'infrastructure de base associées aux appareils ont également été reconnues, dont
certaines sont traitées dans les Annexes E. Le présent document vise à fournir un cadre de base
d'exigences qui reconnaissent ces différences.
SPÉCIFICATION TECHNIQUE ISO/TS 21364-21:2021(F)
Appareils de cuisson domestiques utilisant les
combustibles gazeux — Sécurité —
Partie 21:
Exigences particulières pour les tables de cuisson à gaz,
grils à gaz et grils par contact à gaz
1 Domaine d'application
Le présente document spécifie des exigences particulières relatives à la sécurité, à la construction
et aux matériaux des appareils de cuisson domestiques de surface utilisant les combustibles gazeux.
Pour les exigences générales de sécurité, de construction et de matériaux des tables de cuisson à gaz, la
norme l'ISO/TS 21364-1:2021 s’applique.
Le présent document couvre les éléments suivants:
— appareils de cuisson de surface:
— tables de cuisson;
— grils de surface;
— grils par contact;
encastrés, faisant partie d’un appareil de cuisson ou à poser sur table;
— accessoires de table de cuisson.
Toutefois, il ne couvre pas les appareils de cuisson de surface destinés à une utilisation en extérieur et/
ou commerciale, ainsi que les éléments chauffés électriquement faisant partie de l’appareil. Il ne couvre
pas non plus les appareils avec systèmes automatiques de commande de brûleur.
NOTE 1 Pour les exigences relatives à la sécurité électrique, se référer aux normes IEC.
NOTE 2 L'attention est attirée sur le fait que:
— pour les appareils destinés à une utilisation dans des véhicules ou à bord de bateaux ou aéronefs, des exigences
supplémentaires peuvent être nécessaires;
— dans de nombreux pays, des exigences supplémentaires sont spécifiées par les autorités sanitaires nationales,
les services nationaux de distribution d’eau et les autorités similaires.
Le présent document ne couvre pas les exigences relatives aux bouteilles à gaz, à leurs régulateurs de
pression ou à leurs raccords.
Le présent document ne couvre pas les exigences relatives à l’installation de gaz.
2 Références normatives
Les documents suivants cités dans le texte constituent, pour tout ou partie de leur contenu, des
exigences du présent document. Pour les références datées, seule l'édition citée s'applique. Pour les
références non datées, la dernière édition du document de référence s'applique (y compris les éventuels
amendements).
ISO/TS 21364-1:2021, Appareils de cuisson domestiques utilisant les combustibles gazeux — Sécurité —
Partie 1: Exigences générales
I S O 23551- 8:2016 +A 1: 2019, Dispositifs de commande et de sécurité pour brûleurs à gaz et appareils à
gaz — Exigences particulières — Partie 8: Équipements multifonctionnels
I EC 6 0730 -2-9:2015+A 1: 2018 , Dispositifs de commande électrique automatiques à usage domestique et
analogue — Partie 2-9: Règles particulières pour les dispositifs de commande thermosensibles
3 Termes et définitions
Pour les besoins du présent document, les termes et définitions donnés dans l'ISO/TS 21364-1:2021
ainsi que les suivants s'appliquent.
L’ISO et l’IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en
normalisation, consultables aux adresses suivantes:
— ISO Online browsing platform: disponible à l’adresse https:// www .iso .org/ obp
— IEC Electropedia: disponible à l’adresse http:// www .electropedia .org/
3.1 Définitions relatives aux composants
3.1.1
brûleur découvert
brûleur de table de cuisson dont la flamme est en contact direct avec le récipient
3.1.2
brûleur multicouronnes
brûleur de table de cuisson ayant deux couronnes ou plus d'orifices de brûleur
Note 1 à l'article: Le terme couronne inclut toute répartition d'orifices de brûleur autour de l'axe central du
brûleur.
Note 2 à l'article: Une description détaillée des différents types de brûleurs et de leurs modes de fonctionnement
est donnée dans le Tableau 1.
3.1.3
brûleur multicouronnes à commande sectionnée
brûleur multicouronnes (3.1.2) conçu de sorte qu'une ou plusieurs de ses couronnes puissent être
utilisées indépendamment
3.1.4
brûleur multicouronnes à commande simple
brûleur multicouronnes (3.1.2) conçu de sorte que ses couronnes ne puissent pas être utilisées
indépendamment
3.1.5
dispositif anti-surchauffe
dispositif thermosensible qui est destiné à maintenir la température au-dessous d'une valeur fixée dans
des conditions anormales de fonctionnement de l’appareil et qui ne dispose d’aucun organe réglable par
l'utilisateur final
Note 1 à l'article: Ces dispositifs utilisent généralement une thermistance ou un élément de détection bimétallique.
[SOURCE: ISO 23551-8:2019, Annexe B]
4 Composants des appareils de cuisson utilisant les combustibles gazeux
Le paragraphe 4 de l'ISO/TS 21364-1:2021 s'applique, avec les ajouts suivants.
2 © ISO 2021 – Tous droits réservés
4.1 Généralités
Le paragraphe 4.1 de l'ISO/TS 21364-1:2021 s'applique.
4.2 Robinets manuels de sectionnement de gaz
Le paragraphe 4.2 de l'ISO/TS 21364-1:2021 s'applique, avec les ajouts suivants.
4.2.1 Robinets pour brûleurs multicouronnes
La position «arrêt» d’une commande sectionnée unique à deux sens de fermeture pour brûleurs
multicouronnes doit être conçue de sorte que le passage involontaire de la manette du robinet d'une
plage de réglage à une autre soit impossible. Toutefois, si chacune des couronnes d’un brûleur de ce
type est surveillée par un dispositif de surveillance de flamme, la commande sectionnée unique doit
s’arrêter dans sa position «arrêt».
4.3 Manettes
Le paragraphe 4.3 de l'ISO/TS 21364-1:2021 s'applique, avec les ajouts suivants.
4.3.1 Conception des manettes
Le paragraphe 4.3.1de l'ISO/TS 21364-1:2021 s'applique, avec les ajouts suivants.
4.3.1.1 Manettes pour brûleurs multicouronnes
Si les manettes de commande agissent par rotation, le sens de fermeture ne doit être que celui des
aiguilles d'une montre. Sont exclus de cette disposition les brûleurs multicouronnes avec une seule
commande sectionnée à deux sens de fermeture.
4.4 Équipements multifonctionnels
Le 4.4 de l'ISO/TS 21364-1:2021 s'applique.
4.5 Équipements thermoélectriques de surveillance de flamme
Le 4.5 de l'ISO/TS 21364-1:2021 s'applique.
4.6 Thermostats
Le 4.6 de l'ISO/TS 21364-1:2021 s'applique.
4.7 Régulateurs de pression
Le 4.7 de l'ISO/TS 21364-1:2021 s'applique.
4.8 Robinets automatiques de sectionnement
Le 4.8 de l'ISO/TS 21364-1:2021 s'applique.
4.9 Injecteurs et organes de préréglage
Le 4.9 de l'ISO/TS 21364-1:2021 s'applique.
4.10 Systèmes d’allumage
Le 4.10 de l'ISO/TS 21364-1:2021 s'applique.
4.11 Dispositifs de coupure thermique
Le 4.11 de l'ISO/TS 21364-1:2021 s'applique.
4.12 Brûleurs multicouronnes
Des exemples de brûleurs multicouronnes et de leurs modes de fonctionnement sont présentés dans le
Tableau 1.
Tableau 1 — Exemples de types de brûleurs multicouronnes et de leurs modes
de fonctionnement
Légende
1 Couronne interne du brûleur 5 Alimentation en gaz
2 Couronne externe du brûleur 6 Connexion au dispositif de surveillance de flamme (DSF)
3 Capteur de surveillance de flamme 7 Connexion alternative au DSF
4 Commande de brûleur (robinet)
DSF au niveau de la DSF au niveau de la DSF au niveau des DSF au niveau des DSF au niveau de la
couronne interne ou couronne interne ou couronnes interne couronnes interne couronne interne
externe du brûleur externe du brûleur et externe du et externe du ou externe du
brûleur brûleur brûleur
Type I Type II Type III Type IV Type V
Commande simple Commande sectionnée Commande Deux brûleurs Commande
sectionnée avec simples sectionnée avec
deux directions deux directions
de rotation de rotation
4 © ISO 2021 – Tous droits réservés
Tableau 1 (suite)
Brûleur multicou- Brûleur multicou- Brûleur multicou- Brûleur multicou- Brûleur multicou-
ronnes conçu de sorte ronnes conçu de sorte ronnes conçu de ronnes conçu de ronnes conçu de
que ses couronnes qu'une ou plusieurs sorte qu'une ou sorte à disposer de sorte qu’il possède
ne puissent pas être couronnes puissent plusieurs couronnes deux robinets ou deux directions
utilisées de manière être utilisées de ma- puissent être uti- plus, chacun avec de rotation. Une
indépendante, avec une nière indépendante, lisées de manière une sortie pour l'ali- direction sert à
sortie pour l'alimen- avec deux sorties ou indépendante, avec mentation séparée utiliser une cou-
tation commune de plus pour l'alimen- deux sorties ou plus des couronnes et la ronne du brûleur.
toutes les couronnes tation séparées des pour l'alimenta- même direction de L’autre direction
avec une direction de couronnes avec une tion séparées des rotation. sert à utiliser les
rotation. direction de rotation. couronnes avec deux couronnes du
deux directions brûleur.
de rotation. Les
deux couronnes ne
peuvent pas fonc-
tionner ensemble.
4.13 Dispositifs anti-surchauffe
4.13.1 Exigence
Un dispositif anti-surchauffe, s’il est présent, doit satisfaire aux exigences de l’Annexe BB de
l’ I S O 23551- 8:2016 +A 1: 2019.
Les exigences en matière de sécurité électrique pour le dispositif anti-surchauffe doivent être conformes
à l’IEC 60730-2-9:2015+A1: 2020.
Un dispositif anti-surchauffe destiné à une table de cuisson à gaz doit respecter les éléments suivants:
a) tel que soumis à essai en 4.13.2, le dispositif de sécurité doit se déclencher lorsque la température
de l’huile est inférieure à 300 °C;
b) si la partie thermosensible est endommagée, le passage du gaz vers le brûleur doit être fermé et ne
doit pas être automatiquement réouvert;
c) en cas de défaillance du circuit ou de court-circuit, le passage du gaz vers le brûleur doit être fermé
et ne doit pas être automatiquement réouvert;
d) la section de détection du dispositif de sécurité en cas de surchauffe de l'huile de cuisson doit être
solidement fixée de sorte à ne pas pouvoir être facilement déplacée;
e) le dispositif de sécurité contre la surchauffe de l'huile de cuisson doit posséder une structure qui ne
peut pas être facilement modifiée;
f) après l’application d'une charge conforme à 12.2 à un appareil de cuisson, la partie thermosensible
doit fonctionner normalement.
4.13.2 Essai
Choisir un récipient d’essai conformément au Tableau 1, l'ISO/TS 21364-1:2021. Verser l’huile de
tournesol non utilisée jusqu’à une hauteur de 10 mm.
Un thermocouple est placé au centre du volume d’huile.
Utiliser le gaz de référence à la pression normale.
Faire fonctionner le brûleur au débit calorifique nominal. Mesurer la température maximale de l’huile
pendant le fonctionnement de l’organe de commande.
Si le dispositif anti-surchauffe dispose d’un réglage de la température, celui-ci doit être ajusté à la
température la plus élevée.
5 Conditions générales d'essai
Le paragraphe 5 de l'ISO/TS 21364-1:2021 s’applique.
6 Débit calorifique
Le paragraphe 6 de l'ISO/TS 21364-1:2021 s'applique, avec les ajouts suivants.
6.1 Généralités
Le 6.1 de l'ISO/TS 21364-1:2021 s'applique.
6.2 Obtenir le débit calorifique nominal
Le paragraphe 6.2 de l'ISO/TS 21364-1:2021 s'applique, avec les ajouts suivants.
6.2.1 Mise à l’essai d’un brûleur de table de cuisson
Les mesures sont effectuées, le brûleur étant dans les conditions de fonctionnement suivantes:
— un récipient est placé sur un brûleur découvert conformément à l'ISO/TS 21364-1:2021, 5.7 sans
couvercle, il est ensuite rempli d’eau jusqu’à un niveau de 50 mm ± 5 % au-dessus du fond du
récipient;
— l'appareil étant à température ambiante, le brûleur est allumé et fonctionne à plein débit et à pression
normale pendant 10 minutes;
— le mesurage commence à la fin de la dixième minute, et se termine au plus tard à la fin de la treizième
minute, avec une durée de mesurage minimale d’une minute ou lorsque le plus grand nombre de
révolutions complètes du compteur ont été effectuées avant la fin de la treizième minute. Pour les
compteurs analogiques, le mesurage doit être effectué après au moins une révolution complète.
Le débit calorifique nominal est ensuite calculé dans les conditions de référence conformément à
l'ISO/TS 21364-1:2021, 6.3.
6.2.2 Mise à l’essai d’un brûleur multicouronnes
Toutes les couronnes du brûleur sont mesurées conformément au 6.2.1 lorsqu’elles fonctionnent
ensemble. Les brûleurs multicouronnes munis d’organes de commande séparés pour chaque couronne
du brûleur (Type IV, voir 4.12) sont mesurés séparément.
6.2.3 Mise à l’essai d’un gril de surface et d’un gril par contact sans thermostat
Le brûleur d’un gril de surface et d’un gril par contact sans thermostat est soumis à essai dans les
conditions suivantes:
— les grils de surface et les grils par contact sont soumis à essai sans récipient;
— l'appareil étant à température ambiante, le brûleur est allumé et fonctionne à plein débit et à pression
normale pendant 10 minutes;
— le mesurage commence à la fin de la dixième minute, et se termine au plus tard à la fin de la treizième
minute, avec une durée de mesurage minimale d’une minute ou lorsque le plus grand nombre de
révolutions complètes du compteur ont été effectuées avant la fin de la treizième minute. Pour les
compteurs analogiques, le mesurage doit être effectué après au moins une révolution complète.
6 © ISO 2021 – Tous droits réservés
Le débit calorifique nominal est ensuite calculé dans les conditions de référence conformément à
l'ISO/TS 21364-1:2021, 6.3.
6.2.4 Mise à l’essai d’un gril de surface et d’un gril par contact avec thermostat
Les grils de surface et les grils par contact sont soumis à essai sans récipient. Le mesurage commence
dès l'allumage, le thermostat ou l'organe de commande à plein débit, et se termine au plus tard à la
fin de la cinquième minute, ou lorsque le plus grand nombre de révolutions complètes du compteur
analogique ont été effectuées avant la fin de la cinquième minute. L’essai doit être terminé avant que le
thermostat ne commence à fonctionner.
Le débit calorifique nominal est ensuite calculé dans les conditions de référence conformément à
l'ISO/TS 21364-1:2021, 6.3.
6.3 Mesures et calculs
Le 6.3 de l'ISO/TS 21364-1:2021 s'applique.
6.4 Obtenir le débit calorifique réduit
Le paragraphe 6.4 de l'ISO/TS 21364-1:2021 s'applique, avec les ajouts suivants.
6.4.1 Exigence
Le 6.4.1 de l'ISO/TS 21364-1:2021 s'applique.
6.4.2 Essai
Le 6.4.2 de l'ISO/TS 21364-1:2021 s'applique.
6.4.3 Mise à l’essai d’un brûleur de table de cuisson, d’un gril de surface et d’un brûleur de gril
par contact
Le débit calorifique réduit doit être mesuré après le débit calorifique nominal conformément à
l'ISO/TS 21364-1:2021, 6.4.
6.5 Débit calorique total
Le 6.5 de l'ISO/TS 21364-1:2021 s'applique.
7 Échauffement
Le paragraphe 7 de l'ISO/TS 21364-1:2021 s'applique, avec les ajouts suivants.
7.1 Généralités
Le 7.1 de l'ISO/TS 21364-1:2021 s'applique.
7.2 Conditions de fonctionnement
Le 7.2 de l'ISO/TS 21364-1:2021 s'applique.
7.3 Essais d’échauffement
Le 7.3 de l'ISO/TS 21364-1:2021 s'applique.
7.4 Fonctionnement anormal
Le paragraphe 7.4 de l'ISO/TS 21364-1:2021 s'applique, avec les ajouts suivants:
7.4.1 Brûleur de table de cuisson
7.4.1.1 Exigence
Au cours de l’essai suivant, l’échauffement ne doit pas dépasser les valeurs spécifiées dans
l'ISO/TS 21364-1:2021, 7.4, Tableau 5.
7.4.1.2 Essai
Les récipients ayant le plus grand diamètre autorisé dans la notice d’utilisation et d’entretien sont
placés conformément à l'ISO/TS 21364-1:2021, 7.3.2.2. Si aucun diamètre maximal de récipient n’est
indiqué dans la notice d’utilisation, utiliser un récipient d’un diamètre supérieur de 60 mm à celui
donné dans l'ISO/TS 21364-1:2021, 5.7, Tableau 1. Les récipients sont placés sur chaque brûleur de table
de cuisson et sur les foyers électriques de cuisson en commençant par les récipients spéciaux. Aucun
récipient ne doit dépasser de la table de cuisson. Une distance d'au moins 10 mm doit être prévue entre
la paroi latérale de chaque récipient et tous les autres récipients. Si cette disposition ne peut pas être
obtenue, des récipients d’un diamètre inférieur conformément à l'ISO/TS 21364-1:2021, 5.7, Tableau 2
sont utilisés.
Au cours de l’essai, les récipients sont utilisés avec des couvercles. De l’eau est ajoutée afin de s’assurer
que de l’eau soit toujours présente dans les récipients.
Tous les brûleurs de table de cuisson sont mis en fonctionnement pendant une heure ou jusqu’à ce que
des conditions de régime stables soient atteintes, la durée retenue étant la plus courte des deux,
...
SLOVENSKI STANDARD
oSIST ISO/DIS 21364-21:2020
01-marec-2020
Plinski kuhalni aparati za gospodinjstvo - Varnost - 21. del: Posebne zahteve za
plinske kuhalne plošče, plinske žare in plinske žare z rešetko
Domestic gas cooking appliances - Safety - Part 21: Particular requirements for gas
hobs, gas grills and gas griddles
Titre manque - Partie 21: Titre manque
Ta slovenski standard je istoveten z: ISO/DIS 21364-21:2020
ICS:
97.040.20 Štedilniki, delovni pulti, Cooking ranges, working
pečice in podobni aparati tables, ovens and similar
appliances
oSIST ISO/DIS 21364-21:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST ISO/DIS 21364-21:2020
oSIST ISO/DIS 21364-21:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 21364-21
ISO/TC 291 Secretariat: DIN
Voting begins on: Voting terminates on:
2020-01-30 2020-04-23
Domestic gas cooking appliances — Safety —
Part 21:
Particular requirements for gas hobs, gas grills and gas
griddles
ICS: 97.040.20
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
This document is circulated as received from the committee secretariat.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 21364-21:2020(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2020
oSIST ISO/DIS 21364-21:2020
ISO/DIS 21364-21:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
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ii © ISO 2020 – All rights reserved
oSIST ISO/DIS 21364-21:2020
ISO/DIS 21364-21:2020(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Components in gas cooking appliances . 2
4.2 Manual gas shut-off valves (Taps) . 2
4.2.101 Taps for multi-ring burners . 2
4.3 Knobs . 3
4.3.1 Design of knobs . 3
4.101 Multi-ring burners . 3
4.102 Overheating safety devices . 4
4.102.1 Requirement . 4
4.102.2 Test . 4
5 General conditions of test . 5
6 Heat input . 5
6.2 Obtaining the nominal heat input . . 5
6.2.101 Test of hob burner . 5
6.2.102 Test of multi-ring hob burner . 5
6.2.103 Test of surface grill and griddle without a thermostat . 5
6.2.104 Test of surface grill and griddle with a thermostat . 5
6.4 Obtaining the reduced heat input . 6
6.4.101 Test of hob burner, surface grill and griddle burner . 6
7 Heating . 6
7.4 Abnormal operation . 6
7.4.101 Hob burner . 6
7.4.102 Gas surface grills and griddles . 6
8 Combustion . 7
8.101 Single burner . 7
8.101.1 General requirement . 7
8.101.2 Tests of hob burner, surface grill burner and griddle burner . 7
8.101.3 Tests of multi-ring burner . . 8
8.101.4 Additional test of Type II and Type V multi-ring burners . 9
8.101.5 Sampling the combustion products . 9
8.102 Sooting .12
8.102.1 Requirement .12
8.102.2 Test .12
9 Ignition, cross-lighting and flame stability .13
9.101 Hob burner, surface grill burner and griddle burner .13
9.101.1 General.13
9.101.2 Cold conditions .13
9.101.3 Hot conditions .14
9.102 Multi-ring hob burner .14
9.102.1 Requirement .14
9.102.2 Additional test Type I . .15
9.102.3 Additional test Type II and Type V .15
9.102.4 Resistance to draught .15
10 Accumulation of unburnt gas and leak tightness .16
11 Construction .16
11.2 Materials .16
oSIST ISO/DIS 21364-21:2020
ISO/DIS 21364-21:2020(E)
11.2.101 .
Resistance for non-metallic feet of pan supports .17
11.101 Spillage .17
11.101.1 .
Requirement .17
11.101.2 .
Test .17
11.102 Specific hob parts and hob accessories .17
11.102.1 .
Pan supports .17
11.102.2 .
Removable devices for small pans .17
11.102.3 .
Special supports for convex-based pans .18
11.102.4 .
Covered burners .18
11.103 Shut down lids .18
11.103.1 .
Requirement .18
11.103.2 .
Test .18
11.103.3 .
Glass shut down lids .18
11.103.4 .
Shut-off device .19
12 Mechanical strength .19
12.1 Glass and glass ceramic .19
12.1.101 .
Thermal stress resistance for hob glass and glass-ceramic surfaces .20
12.101 Pan support .20
12.101.1 .
Requirement .20
12.101.2 .
Test .20
13 Electrical safety .20
13.3 Touch controls .20
13.3.101 .
Requirement .20
13.3.102 .
Test .20
14 Marking and instructions .21
Annexes Annexes .22
Annex E (informative) National deviations in various countries .23
Bibliography .25
iv © ISO 2020 – All rights reserved
oSIST ISO/DIS 21364-21:2020
ISO/DIS 21364-21:2020(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 291, Domestic gas cooking appliances.
A list of all parts in the ISO 21364 series can be found on the ISO website.
oSIST ISO/DIS 21364-21:2020
ISO/DIS 21364-21:2020(E)
Introduction
This International Standard provides general requirements for safety of domestic gas cooking
appliances.
This International Standard can also be applied, so far as is reasonable, to appliances not mentioned in
this specific standard and to appliances designed on the basis of new principles, in which case additional
requirements may be necessary.
Where no specific International Standard for an appliance exists, the appliance can be tested according
to this International Standard and further tests which take into account the intended use.
Gas burning appliances using fuel gases need to withstand the type of gas which is specified. Other ISO
technical committees, e.g. ISO/TC 193, Natural gas, deal with the testing and properties of fuel gases.
Note that, due to the differing properties of fuel gas depending on its source/region of origin, certain
differences in regulations exist at present in different regions; some of these differences are presented
in Annex E.
This International Standard covers type testing.
This International Standard series is structured as follows:
ISO 21364 Domestic gas cooking appliances – Safety
— Part 1: General requirements
— Part 21: Particular requirements for gas hobs, gas grills and gas griddles
— Part 22: Particular requirements for ovens and compartment grills
This Part 21 is to be used in conjunction with ISO/DIS 21364-1:2019.
This Part 21 supplements or modifies the corresponding clauses in ISO/DIS 21364-1:2019, so as to
convert that publication into the ISO standard: Specific requirements for gas hobs, gas grills and gas
griddles.
When a particular subclause of ISO/DIS 21364-1:2019 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 ISO/DIS 21364-1:2019 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
ISO/DIS 21364-1:2019;
— 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;
vi © ISO 2020 – All rights reserved
oSIST ISO/DIS 21364-21:2020
DRAFT INTERNATIONAL STANDARD ISO/DIS 21364-21:2020(E)
Domestic gas cooking appliances — Safety —
Part 21:
Particular requirements for gas hobs, gas grills and gas
griddles
1 Scope
This Part of ISO 21364 specifies particular requirements for safety, construction and materials of
household gas surface cooking appliances. For general requirements for safety, construction and
materials of gas hobs the Standard ISO/DIS 21364-1:2019 applies.
This Part covers the following:
— surface cooking appliances:
— hobs;
— surface grills;
— griddles;
being built-in, part of a cooking appliance or table top;
— hobs accessories.
It does not cover surface cooking appliances intended for outdoor use and/or commercial use as well
as electrical heated elements as part of the appliance. It does also not cover appliances with automatic
burner control systems.
NOTE 1 For requirements of electrical safety refer to the IEC standards.
NOTE 2 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 the national health authorities, the national
water supply authorities and similar authorities
This International Standard does not cover requirements for gas installation.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 21364-1:20xx, Domestic gas cooking appliances – Safety- Part 1: General requirements
ISO 23551-8:2019, Safety and control devices for gas burners and gas-burning appliances — Particular
requirements — Part 8: Multifunctional controls
IEC 60730-2-9:2018, Automatic electrical controls for household and similar use — Part 2-9: Particular
requirements for temperature sensing controls
oSIST ISO/DIS 21364-21:2020
ISO/DIS 21364-21:2020(E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/DIS 21364-1:2019 apply with
the following additions.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
3.3 Definitions relating to components
3.3.101
Hob guard
device that reduces physical access to the cooking surface to avoid hazardous situations
3.3.102
open burner
hob burner with the flame in direct contact with the pan
3.3.103
multi-ring burners
hob burner assembly having two or more rings of burner ports
Note 1 to entry: The term ring includes any distribution of burner ports around the central axis of the burner.
Note 2 to entry: A detailed description of the different types of burners and their operating modes is given in
Table 101.
3.3.104
multi-ring burner with sectional control
multi-ring burner that is so designed that one or more of its rings of burner ports can be utilised
independently
3.3.105
multi-ring burner with simple control
multi-ring burner that is so designed that its rings of burner ports cannot be utilised independently
3.3.106
overheating safety device
temperature sensing device which is intended to keep temperature below one particular value during
abnormal operating conditions of the appliance and which has no provision for setting by the end user
[SOURCE: ISO 23551-8:2019, Annex BB]
Note 1 to entry: Note to entry: These devices usually use a thermistor or a bimetal sensing part (element).
4 Components in gas cooking appliances
This clause of ISO/DIS 21364-1:2019 applies with the following additions.
4.2 Manual gas shut-off valves (Taps)
This clause of ISO/DIS 21364-1:2019 applies with the following additions.
4.2.101 Taps for multi-ring burners
The “off” position of a single sectional control with two closing directions for multi-ring hob burners
shall be designed to make it impossible for the tap knob to be inadvertently moved from one adjustment
2 © ISO 2020 – All rights reserved
oSIST ISO/DIS 21364-21:2020
ISO/DIS 21364-21:2020(E)
range to another. However, if each ring of such multi-sectional hob burner is supervised by a flame
supervision device, the single sectional control shall stop in its “off” position.
4.3 Knobs
This clause of ISO/DIS 21364-1:2019 applies with the following additions.
4.3.1 Design of knobs
This clause of ISO/DIS 21364-1:2019 applies with the following additions.
4.3.1.101 Multi-ring burner knobs
If the control knob operates by turning, the closing direction shall only be clockwise. This does not
apply to multi-ring hob burners with a single sectional control and two closing directions.
4.101 Multi-ring burners
Table 101 shows examples of multi-ring burners and their operating modes.
Table 101 — Examples of types of multi-ring burners and their operating modes
Key
1 Inner Burner-ring 5 Gas supply
2 Outer Burner-ring 6 Connection to FSD
3 Flame supervision sensor 7 Alternative connection to FSD
4 Burner control (tap)
oSIST ISO/DIS 21364-21:2020
ISO/DIS 21364-21:2020(E)
Table 101 (continued)
FSD at inner or outer FSD at inner or outer FSD at inner and FSD at inner and FSD at inner or
burner ring burner ring outer burner ring outer burner ring outer burner ring
Type I Type II Type III Type IV Type V
Simple control Sectional control Sectional control Two single burners Sectional control
with two turning with two turning
directions directions
Multi-ring burner that Multi-ring burner that Multi-ring burner Multi-ring burner Multi-ring burner
is so designed that its is so designed that one that is so designed that is so designed that is so designed
rings of burner ports or more of its rings of that one or more of that it has two or that it has two
cannot be utilized burner ports can be its rings of burner more taps each turning directions.
independently, with utilized independent- ports can be uti- with one outlet for One direction is
one outlet for common ly, with two or more lized independently, separate supply of for utilizing one
supply of all burner outlets for separate with two or more the burner rings burner ring. The
rings with one turning supply of the burner outlets for separate and same turning other direction
direction. rings with one turning supply of the burner direction. is to utilize both
direction. rings with two burner rings.
turning directions.
The two rings
cannot be operated
together.
4.102 Overheating safety devices
4.102.1 Requirement
An overheating safety device, if any, shall comply with the requirements in Annex BB of ISO 23551-8:2019.
Electrical safety requirements for the overheating safety device shall be according to
IEC 60730-2-9:2018 Ed 4.1.
An overheating safety device for a gas hob shall be as follows:
a) safety device shall be operated when the oil temperature is below 300 °C;
b) when the thermal sensing part is damaged, the gas passage to the burner shall be closed and shall
not be reopened automatically;
c) for circuit failure or short-circuit, the gas passage to the burner shall be closed and shall not be
reopened automatically.
d) The detection section of cooking oil overheating safety device shall be firmly secured not to be
easily off-positioned.
e) The cooking oil overheating safety device shall have a structure in which it cannot be easily altered.
f) After applying a load according to 12.101 to a cooking appliance, the temperature sensing part shall
normally operate.
4.102.2 Test
Select test pan according to Table 1, ISO 21364-1:20xx. Pour in the unused sunflower oil to a depth
of 10 mm.
A thermocouple is placed in the centre of the oil volume.
Use reference gas at normal pressure.
Operate the burner at nominal heat input. Measure the highest temperature of oil as the control device
is functioning.
4 © ISO 2020 – All rights reserved
oSIST ISO/DIS 21364-21:2020
ISO/DIS 21364-21:2020(E)
If the overheat safety device has an adjustable setting temperature, it shall be set to the highest
temperature.
5 General conditions of test
This clause of ISO/DIS 21364-1:2019 applies.
6 Heat input
This clause of ISO/DIS 21364-1:2019 applies with the following additions.
6.2 Obtaining the nominal heat input
This clause of ISO/DIS 21364-1:2019 applies with the following additions.
6.2.101 Test of hob burner
The measurements are taken with the burner operating under the following conditions:
— a pan is placed on an open burner in accordance with ISO/DIS 21364-1:2019, 5.7 without a lid and
filled with water to a level of 50 mm ± 5 % above the bottom of the pan.;
— with the appliance at ambient temperature, the burner is ignited and operated at full rate at normal
pressure for 10 min;
— measurement starts at the end of the tenth minute and finishes at the latest at the end of the
thirteenth minute, with a minimum measurement time of one minute or when the highest number
of complete revolutions of the meter have been made before the end of the thirteenth minute. For
analogue meters, the measurement shall be taken over at least one complete revolution.
Then the heat input is calculated under reference conditions according to ISO/DIS 21364-1:2019, 6.3.
6.2.102 Test of multi-ring hob burner
All burner rings are measured according to 6.2.101 when operated together. Multi-ring burners with
separate controls for each burner ring (Type IV, see 4.101) are measured separately.
6.2.103 Test of surface grill and griddle without a thermostat
The burner of a surface grill and a griddle without a thermostat is tested under the following conditions:
— surface grills and griddles are tested without a pan;
— with the appliance at ambient temperature, the burner is ignited and operated at full rate at normal
pressure for 10 min;
— measurement starts at the end of the tenth minute and finishes at the latest at the end of the
thirteenth minute, with a minimum measurement time of one minute or when the highest number
of complete revolutions of the meter have been made before the end of the thirteenth minute. For
analogue meters, the measurement shall be taken over at least one complete revolution.
Then the heat input is calculated under reference conditions according to ISO/DIS 21364-1:2019, 6.3.
6.2.104 Test of surface grill and griddle with a thermostat
Surface grills and griddles are tested without a pan. Measuring begins from ignition, with the thermostat
or control device at full rate and terminates at the end of the fifth minute or when the highest number of
oSIST ISO/DIS 21364-21:2020
ISO/DIS 21364-21:2020(E)
complete revolutions of the analogue meter have been made before the end of the fifth minute. The test
shall be finished before the thermostat starts cycling.
Then the heat input is calculated under reference conditions according to ISO/DIS 21364-1:2019, 6.3.
6.4 Obtaining the reduced heat input
This clause of ISO/DIS 21364-1:2019 applies with the following additions.
6.4.101 Test of hob burner, surface grill and griddle burner
The reduced heat input shall be measured after the nominal heat input according to
ISO/DIS 21364-1:2019, 6.4.
7 Heating
This clause of ISO/DIS 21364-1:2019 applies with the following additions.
7.4 Abnormal operation
This clause of ISO/DIS 21364-1:2019 applies with the following additions.
7.4.101 Hob burner
7.4.101.1 Requirement
During the following test, the temperature rise shall not exceed the values specified in
ISO/DIS 21364-1:2019, 7.4, Table 5.
7.4.101.2 Test
Pans with the biggest diameter allowed in the instruction for use and maintenance are placed according
ISO/DIS 21364-1:2019, 7.3.1.2. If no maximum pan size is given in the instructions for use, use a pan
with a diameter 60 mm bigger than given in ISO/DIS 21364-1:2019, 5.7, Table 1. The pans are placed
on each hob burner and electric cooking plate, starting with the special pans. No pan shall overlap
the edges of the hob. A distance of at least 10 mm shall be provided between the side surface of each
pan and all other pans. If this arrangement is not possible, pans with a smaller diameter according to
ISO/DIS 21364-1:2019, 5.7, Table 2 are used.
During the test, the pans are used with lids. Water is added to ensure that water is always present in
the pans.
All hob burners are operated for 1 h or up to steady conditions, whatever is shorter, with one of the
reference gases (according to the corresponding table of ISO/DIS 21364-1:2019, Annex A) at nominal
heat input with normal pressure, their control being at full rate.
NOTE Steady conditions are deemed to have been achieved when the measured temperatures do not vary by
more than 1 K in 15 min.
7.4.102 Gas surface grills and griddles
7.4.102.1 Requirement
During the following test, the temperature rise shall not exceed the values specified in
ISO/DIS 21364-1:2019, 7.4, Table 5.
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oSIST ISO/DIS 21364-21:2020
ISO/DIS 21364-21:2020(E)
7.4.102.2 Test
Griddles are operated without a pan for 1 h or up to steady conditions, whatever is shorter, with one of
the reference gases at nominal heat input, their control being at full rate.
8 Combustion
This clause of ISO/DIS 21364-1:2019 applies with the following additions.
8.101 Single burner
8.101.1 General requirement
Under the conditions described below, the CO concentration in the air-free- and dry combustion
products shall not exceed:
— 0,10 % for Test no. 1;
— 0,15 % for Tests no. 2, 3;
— 0,20 % for Test no. 4.
The requirements are verified in the course of the tests given in Table 102.
8.101.2 Tests of hob burner, surface grill burner and griddle burner
The appliance shall be installed according to ISO/DIS 21364-1:2019, 5.6, but without the horizontal
wooden panel or range hood above the appliance. An additional panel is installed on that side of the
appliance where the burner with the highest heat input is located, or whichever side results in the worst
case test condition. Any gaps allowing air to pass through between the side panel and the back panel
are sealed with adhesive tape.
Each of the burners shall be operated individually and has to be previously adjusted to its nominal
heat input.
Table 102 — Conditions and limits for combustion tests
Test no. Burners in op- Gas used Heat input rate Test pressure Maximum CO
eration concentration
% / Vol
1 Each burner indi- Each reference Full rate p 0,10
max
vidually gas
2 Each burner indi- Each reference Position corre- p 0,15
n
vidually gas sponding to ½
nominal heat
input
3 Each burner indi- Limit gas for Full rate p 0,15
max
vidually incomplete com-
b
bustion
4 Each burner indi- One of the refer- Full rate p 0,20
n
a
vidually ence gases
a
The reference gas giving the highest CO concentration in Test no. 1.
b
Test no. 3 is only applicable, if in Annex A a limit gas for incomplete combustion is specified.
Tests no. 1, 2 and 3 are carried out with and without the special support for small pans, where requested
by the instructions for use and maintenance.
oSIST ISO/DIS 21364-21:2020
ISO/DIS 21364-21:2020(E)
In case the appliance is delivered with other special supports they have to be tested according to the
use described in the instruction for use and maintenance.
Test no. 4 is only carried out when the appliance has a mains electricity supply. Any special support for
small pans is not used.
Test no. 1
For appliances that have no pressure regulator, or for appliances fitted with this device where their
function has been annulled, the test pressure is the maximum pressure of the test gas used. Test
gases and pressures are indicated in the corresponding table of Annex A in ISO/DIS 21364-1:2019. For
appliances with a regulator, the test is carried out with the test pressure adjusted to achieve a burner
heat input of 1,075 times the nominal heat input.
Test no. 2
This test shall be carried out at normal pressure immediately after Test no. 1 without cooling down the
appliance. The heat input of the burner is adjusted to half the nominal heat input using the burner tap.
For griddles and surface grills, this test is carried out using the position corresponding to half the
nominal heat input, or, if this is not possible, using the position, which is as close as possible to half the
nominal heat input.
Test no. 3
The incomplete combustion limit gas is used without changing the adjustments and pressures used for
the corresponding reference gas used in Test no. 1.
Test no. 4
If fluctuations of the main electrical voltage can have an influence on combustion of any burner, the test
is carried out individually on each burner with one of the reference gases (see the corresponding table
of ISO/DIS 21364-1:2019, Annex A) at normal pressure. The appliance being supplied with electricity
at 1.10 times the maximum nominal voltage specified on the appliance. The test is repeated with the
appliance supplied with electricity at 0,85 times the minimum nominal voltage. It shall be verified that
each hob burner ignites and continues to function during the test.
8.101.3 Tests of multi-ring burner
An overview of the types of multi-ring burners is given in 4.101, Table 101.
Type I
A multi-ring burner with a simple control is tested with all the rings in operation together as one single
burner (see 8.101.2).
Type II
A multi-ring burner with a sectional control is tested with all the rings in operation together as one
single burner (see 8.101.2). Besides, the additional test described below shall be performed.
Type III
For multi-ring burners with a sectional control with two turning directions, each section is tested as a
single burner (see 8.101.2).
Type IV
A multi-ring burner with separate controls for each burner ring is tested first considering each burner
ring as a single burner (see 8.101.2), and later tested with all burner-rings in operation together as one
single burner.
8 © ISO 2020 – All rights reserved
oSIST ISO/DIS 21364-21:2020
ISO/DIS 21364-21:2020(E)
Type V
A multi-ring burner with a sectional control with two turning directions is tested with all the rings in
operation together as one single burner (see 8.101.2). Besides the additional test described below shall
be performed.
8.101.4 Additional test of Type II and Type V multi-ring burners
8.101.4.1 Requirement
The CO concentration in the air and dry combustion products shall not exceed 0,15 % by volume.
8.101.4.2 Test
A test is carried out with each of the reference gases, supplied at normal test pressure. Each multi-
ring burner is tested in a position corresponding to the maximum rate obtainable when the smallest
number of burner rings is in use.
8.101.5 Sampling the combustion products
The sampling of the combustion products is carried out with each burner in turn.
A pan in accordance with Table 103 is placed on the burner:
— 220 mm diameter pan, filled with 2 kg of water at ambient temperature, is used on a hob burner
having a nominal heat input not exceeding 4,2 kW and on a fish burner of useful length equal to, or
less than, 140 mm;
— 300 mm diameter pan, filled with 3 kg of water at ambient temperature, is used on a hob burner
having a nominal heat input greater than 4,2 kW.
Table 103 — Pans for combustion test with the sampling hoods in Figure 102 and 103
Dimension Uni
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