Gas heated catering equipment - Part 1: General safety requirements

This document specifies the requirements and test methods for the construction and operating characteristics relating to safety and rational use of energy for gas heated commercial catering and bakery appliances intended to be used indoor.
This document applies to all professional cooking and bakery appliances using gas for preparing food and drink.
Only appliances of types A1, A2, A3, B1 and B2, as defined in Clause 4, are considered in this document.
Only the net calorific value (Hi) and net Wobbe index (Wi) are used.
The requirements concerning specific types of appliances are given in the relevant Part 2.
Annex C (informative) lists the main types of equipment covered by the scope of this document.
Appliances covered by this document are not intended to use gases containing carbon monoxide or other toxic components.
NOTE   For appliances intended to be used in vehicles, in trailers or on-board ships, additional requirements can be necessary.

Großküchengeräte für gasförmige Brennstoffe - Teil 1: Allgemeine Sicherheitsanforderungen

Dieses Dokument legt die Anforderungen und Prüfverfahren für die Bauweise und Bedienung bezüglich Sicherheit, sowie die rationelle Energienutzung für Großküchen- und Bäckereigeräte für gasförmige Brennstoffe fest, die für die Verwendung in Innenräumen bestimmt sind.
Dieses Dokument gilt für alle gewerblichen Koch- und Backgeräte, die Gas für die Zubereitung von Speisen und Getränken verwenden.
Nur Geräte der Arten A1, A2, A3, B1 und B2, wie in Abschnitt 4 definiert, werden in diesem Dokument berücksichtigt.
Es werden nur der Heizwert (Hi) und der untere Wobbeindex (Wi) verwendet.
Die Anforderungen an bestimmte Gerätetypen sind in dem entsprechenden Teil 2 aufgeführt.
Im informativen Anhang C sind die wesentlichen Gerätetypen des Anwendungsbereiches dieses Dokuments aufgelistet.
Geräte, die unter dieses Dokument fallen, sind nicht für die Verwendung von Gasen vorgesehen, die Kohlenmonoxid oder andere toxische Komponenten enthalten.
ANMERKUNG   Geräte, die für die Nutzung in Fahrzeugen, in Anhängern oder an Bord von Schiffen gedacht sind, können zusätzliche Anforderungen notwendig sein.

Appareils de cuisine professionnelle utilisant les combustibles gazeux - Partie 1 : Exigences générales de sécurité

Le présente document spécifie les exigences et les méthodes d'essai pour la construction et caractéristiques de fonctionnement relatives à la sécurité et à l'utilisation rationnelle de l'énergie des appareils de cuisson professionnelle et de boulangerie artisanale utilisant les combustibles gazeux destinés à être utilisés à l’intérieur.
Le présent document s’applique à tous les appareils de cuisson professionnelle et de boulangerie artisanale utilisant les combustibles gazeux destinés à la préparation et à la cuisson des aliments et des boissons.
Seuls les appareils des types A1, A2, A3, B1 et B2, comme définis à l’Article 4, sont étudiés dans le présent document.
Seuls le pouvoir calorifique inférieur (Hi) et l’indice de Wobbe inférieur (Wi) sont utilisés.
Les exigences spécifiques sont données dans la Partie 2.
L’Annexe C, informative, donne une liste des principaux types d’appareils entrant dans le champ d’application du présent document.
Les appareils couverts par cette norme ne sont pas destinés à utiliser des gaz contenant du monoxyde de carbone ou d'autres composants toxiques.
NOTE   Pour les appareils destinés à être utilisés dans des véhicules, dans des wagons ou à bord de navires, des exigences supplémentaires peuvent être nécessaires.

Plinske naprave za gostinstvo - 1. del: Splošna varnostna pravila

General Information

Status
Published
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
22-Dec-2021
Completion Date
22-Dec-2021

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SLOVENSKI STANDARD
SIST EN 203-1:2022
01-april-2022
Nadomešča:
SIST EN 203-1:2014
SIST EN 203-1:2014/AC:2016
Plinske naprave za gostinstvo - 1. del: Splošna varnostna pravila
Gas heated catering equipment - Part 1: General safety rules
Großküchengeräte für gasförmige Brennstoffe - Teil 1: Allgemeine
Sicherheitsanforderungen

Appareils de cuisine professionnelle utilisant les combustibles gazeux - Partie 1: Règles

générales de sécurité
Ta slovenski standard je istoveten z: EN 203-1:2021
ICS:
97.040.20 Štedilniki, delovni pulti, Cooking ranges, working
pečice in podobni aparati tables, ovens and similar
appliances
SIST EN 203-1:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 203-1:2022
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SIST EN 203-1:2022
EN 203-1
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2021
EUROPÄISCHE NORM
ICS 97.040.20 Supersedes EN 203-1:2014
English Version
Gas heated catering equipment - Part 1: General safety
requirements

Appareils de cuisine professionnelle utilisant les Großküchengeräte für gasförmige Brennstoffe - Teil 1:

combustibles gazeux - Partie 1 : Exigences générales de Allgemeine Sicherheitsanforderungen

sécurité
This European Standard was approved by CEN on 3 October 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 203-1:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 203-1:2022
EN 203-1:2021 (E)
Contents Page

European foreword ............................................................................................................................................. 4

1 Scope .......................................................................................................................................................... 5

2 Normative references .......................................................................................................................... 5

3 Terms and definitions ......................................................................................................................... 7

3.1 Terminology referring to gases and pressures .......................................................................... 7

3.2 Terminology referring to appliance design ................................................................................. 8

3.3 Terminology referring to appliance operation ........................................................................13

4 Classification .........................................................................................................................................15

5 Constructional requirements .........................................................................................................16

5.1 General ....................................................................................................................................................16

5.2 Particular requirements for components in the gas circuit ................................................22

5.3 Particular requirements ...................................................................................................................27

6 Performance requirements .............................................................................................................28

6.1 Soundness ..............................................................................................................................................28

6.2 Obtaining the gas rate........................................................................................................................29

6.3 Safety of operation ..............................................................................................................................30

6.4 Influence of burners on each other ..............................................................................................33

6.5 Auxiliary equipment ..........................................................................................................................33

6.6 Air proving device ...............................................................................................................................34

6.7 Combustion ...........................................................................................................................................35

6.8 Auxiliary energy ..................................................................................................................................36

6.9 Rational use of energy .......................................................................................................................36

6.10 Operating requirements - Temperature of the LPG cylinder and its compartment ...36

7 Test conditions .....................................................................................................................................37

7.1 General ....................................................................................................................................................37

7.2 Soundness ..............................................................................................................................................40

7.3 Obtaining gas rates .............................................................................................................................41

7.4 Operational safety ...............................................................................................................................44

7.5 Auxiliary equipment ..........................................................................................................................50

7.6 Combustion ...........................................................................................................................................51

7.7 Air-proving device ..............................................................................................................................54

7.8 Special tests ...........................................................................................................................................56

7.9 Test method - Overheating of the LPG cylinder and its compartment .............................56

7.10 Rational use of energy .......................................................................................................................57

8 Marking and instructions .................................................................................................................57

8.1 General requirements for marking and instructions ............................................................57

8.2 Marking on the appliance .................................................................................................................57

8.3 Instructions for installation and adjustment ............................................................................58

8.4 Instructions for use and maintenance .........................................................................................60

Annex A (informative) National situations ...............................................................................................68

Annex B (normative) Use of symbols on appliances and packaging ...............................................71

Annex C (informative) Trilingual list of appliances in the scope of EN 203-1 and

corresponding Part 2 .........................................................................................................................73

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SIST EN 203-1:2022
EN 203-1:2021 (E)

Annex D (informative) Configuration of the gas circuit ....................................................................... 75

Annex E (normative) Material in contact with food .............................................................................. 77

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Regulation (EU) 2016/426 aimed to be covered ................................... 80

Bibliography ....................................................................................................................................................... 83

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SIST EN 203-1:2022
EN 203-1:2021 (E)
European foreword

This document (EN 203-1:2021) has been prepared by Technical Committee CEN/TC 106 “Large kitchen

appliances using gaseous fuels”, the secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by June 2022, and conflicting national standards shall be

withdrawn at the latest by June 2022.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 203-1:2014.

This document has been prepared under a Standardization Request given to CEN by the European

Commission and the European Free Trade Association, and supports essential requirements of

EU Directive(s) / Regulation(s).

For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral part

of this document.

This document constitutes Part 1 of EN 203, Gas heated catering equipment. Particular requirements are

given in the relevant Part 2: Specific requirements.
The main changes compared to the previous edition are the following:
— Update of the scope to further clarify that appliances are to be used indoors;

— Alignment with the Gas Appliances Regulation and the Vademecum on European standardization in

support of Union legislation and policies based on Standardization Request/Mandate (under

drafting);

— Introduction of reference to EN 1672-2:2005+A1:2009 for the verification of materials and parts in

contact with food and other hygiene aspects as consequence of the withdrawal of EN 203-3:2009;

— Revision of the text in Clause 5 for clarification of its contents and addition of specific compliance

criteria when missing;
— Addition of the adjustement of the sequential function control (7.6.2.1);
— Addition of the accuracy of measuring instruments (7.1.8).

Any feedback and questions on this document should be directed to the users’ national standards body.

A complete listing of these bodies can be found on the CEN website.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,

Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,

Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North

Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United

Kingdom.
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SIST EN 203-1:2022
EN 203-1:2021 (E)
1 Scope

This document specifies the requirements and test methods for the construction and operating

characteristics relating to safety and rational use of energy for gas heated commercial catering and

bakery appliances intended to be used indoor.

This document applies to all professional cooking and bakery appliances using gas for preparing food and

drink.

Only appliances of types A , A , A , B and B , as defined in Clause 4, are considered in this document.

1 2 3 1 2
Only the net calorific value (Hi) and net Wobbe index (Wi) are used.

The requirements concerning specific types of appliances are given in the relevant Part 2.

Annex C (informative) lists the main types of equipment covered by the scope of this document.

Appliances covered by this document are not intended to use gases containing carbon monoxide or other

toxic components.

NOTE For appliances intended to be used in vehicles, in trailers or on-board ships, additional requirements

can be necessary.
2 Normative references

The following documents are referred to in the text in such a way that some or all 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.

EN 88-1:2011+A1:2016, Pressure regulators and associated safety devices for gas appliances - Part 1:

Pressure regulators for inlet pressures up to and including 50 kPa

EN 88-2:2007, Pressure regulators and associated safety devices for gas appliances - Part 2: Pressure

regulators for inlet pressures above 500 mbar up to and including 5 bar

EN 125:2010+A1:2015, Flame supervision devices for gas burning appliances - Thermoelectric flame

supervision devices
EN 126:2012, Multifunctional controls for gas burning appliances

EN 161:2011+A3:2013, Automatic shut-off valves for gas burners and gas appliances

EN 257:2010, Mechanical thermostats for gas-burning appliances

EN 298:2012, Automatic burner control systems for burners and appliances burning gaseous or liquid fuels

EN 437:2021, Test gases - Test pressures - Appliance categories

EN 549:2019, Rubber materials for seals and diaphragms for gas appliances and gas equipment

EN 751-1:1996, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases

and hot water - Part 1: Anaerobic jointing compounds

EN 751-2:1996, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases

and hot water - Part 2: Non-hardening jointing compounds
EN 1106:2010, Manually operated taps for gas burning appliances

EN 1672-2:2005+A1:2009, Food processing machinery – Basic concepts – Part 2: Hygiene requirements

---------------------- Page: 7 ----------------------
SIST EN 203-1:2022
EN 203-1:2021 (E)

EN 1717:2000, Protection against pollution of potable water in water installations and general

requirements of devices to prevent pollution by backflow

EN 10226-1:2004, Pipe threads where pressure tight joints are made on the threads - Part 1: Taper external

threads and parallel internal threads - Dimensions, tolerances and designation

EN 10226-2:2005, Pipe threads where pressure tight joints are made on the threads - Part 2: Taper external

threads and taper internal threads - Dimensions, tolerances and designation

EN 12067-2:2004, Gas/air ratio controls for gas burners and gas burning appliances - Part 2: Electronic

types

EN 13611:2019, Safety and control devices for burners and appliances burning gaseous and/or liquid fuels

- General requirements

EN 16340:2014, Safety and control devices for burners and appliances burning gaseous or liquid fuels -

Combustion product sensing devices

EN 60335-1:2012 , Household and similar electrical appliances - Safety - Part 1: General requirements (IEC

60335-1:2010, modified)

EN 60335-2-102:2016, Household and similar electrical appliances - Safety - Part 2-102: Particular

requirements for gas, oil and solid-fuel burning appliances having electrical connections (IEC 60335-2-

102:2004, modified)

EN 60730-1:2016 , Automatic electrical controls for household and similar use - Part 1: General

requirements (IEC 60730-1:2013, modified)

EN IEC 60730-2-9:2019 , Automatic electrical controls - Particular requirements for temperature sensing

control (IEC 60730-2-9:2015)

EN 61770:2009 , Electric appliances connected to the water mains - Avoidance of backsiphonage and

failure of hose-sets (IEC 61770:2008)

EN ISO 228-1:2003, Pipe threads where pressure-tight joints are not made on the threads - Part 1:

Dimensions, tolerances and designation (ISO 228-1:2000)

As impacted by EN 60335-1:2012/AC:2014, EN 60335-1:2012/A11:2014, EN 60335-1:2012/A13:2017,

EN 60335-1:2012/A1:2019, EN 60335-1:2012/A2:2019 and EN 60335-1:2012/A14:2019.
As impacted by EN 60730-1:2016/A1:2019.
As impacted by EN IEC 60730-2-9:2019/A1:2019 and EN IEC 60730-2-9:2019/A2:2020.

As impacted by EN 61770:2009/AC:2011, EN 61770:2009/A11:2018 and EN 61770:2009/A1:2019.

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SIST EN 203-1:2022
EN 203-1:2021 (E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

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 https://www.electropedia.org/
3.1 Terminology referring to gases and pressures
3.1.1
gas family

group of gaseous fuels with similar burning behaviour linked together by a range of Wobbe indices

[SOURCE: EN 437:2021, 3.18]
3.1.2
gas group
specified range of Wobbe index within that of the family concerned
Note 1 to entry: See EN 437:2021, Table 1.

Note 2 to entry: This range is determined on the general principle that appliances utilizing this gas group would

operate safely when burning all gases within this range without adjustment.

Note 3 to entry: Adjustment of the appliance may be permitted in accordance with the special national or local

conditions that apply in some countries.
[SOURCE: EN 437:2021, 3.19]
3.1.3
appliance category

means of identifying the gas families and/or gas groups for which a gas appliance is designed to operate

safely and to the desired performance level
[SOURCE: EN 437:2021, 3.20]
3.1.4
gas supply pressure

difference between the pressure measured at the inlet connection of the appliance, with the appliance in

operation, and atmospheric pressure
Note 1 to entry: Gas supply pressure is expressed in millibars (mbar).
3.1.5
relative density

ratio of the masses of equal volumes of dry gas and dry air under the same conditions of temperature and

pressure: 15 °C or 0 °C and 1 013,25 mbar
---------------------- Page: 9 ----------------------
SIST EN 203-1:2022
EN 203-1:2021 (E)
3.1.6
calorific value

quantity of heat produced by the complete combustion, of a unit volume or mass of dry gas, the

constituents of the combustible mixture being taken at reference conditions of 15 °C, 1 013,25 mbar and

the products of combustion being brought back to the same conditions
Note 1 to entry: A distinction is made between:

— the gross calorific value H : the water produced by combustion is assumed to be condensed;

— the net calorific value H : the water produced by combustion is assumed to be in the vapour state.

Note 2 to entry: The calorific value is expressed:

— either in megajoules per cubic metre (MJ/m ) of dry gas under the reference conditions of 15 °C, 1 013,25 mbar;

— or in megajoules per kilogram (MJ/kg) of dry gas.
3.1.7
Wobbe index

gross Wobbe index Ws: net Wobbe index Wi ratio of the calorific value of a dry gas per unit volume and

the square root of its relative density under the reference conditions of 15 °C, 1 013,25 mbar

Note 1 to entry: The Wobbe index is said to be gross or net according to whether the calorific value used is the

gross or net calorific value.
Note 2 to entry: The Wobbe indices are expressed:

— either in megajoules per cubic metre (MJ/m ) of dry gas under the reference conditions of 15 °C, 1 013,25 mbar;

— or in megajoules per kilogram (MJ/kg) of dry gas.
3.2 Terminology referring to appliance design
3.2.1 Terminology referring to the gas circuit
3.2.1.1
gas circuit

part of an appliance, between the gas inlet connection and the burner(s), which conveys or contains the

gas
3.2.1.2
inlet connection
part of the appliance which is intended to be connected to the gas supply
3.2.1.3
mechanical joint (or mechanical means of obtaining soundness)

assembly of several parts, generally metallic, which achieves soundness by use of mechanical means such

as metal-to-metal joints, toroidal sealing rings (O rings) or flat joints
3.2.1.4
restrictor

device with one or more orifices that is placed in the path of the gas flow between the appliance inlet

connection and the burner to create a pressure drop, and thus reduces the gas pressure at the burner to

a predetermined value for a given supply pressure and rate
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SIST EN 203-1:2022
EN 203-1:2021 (E)
3.2.1.5
gas rate adjuster

component which allows the gas input to each burner to be set at a predetermined value according to

supply conditions by continuous (screw adjuster) or discontinuous (changing restrictors) action

Note 1 to entry: The operation of setting this device is known as “setting the gas rate”.

3.2.1.6
pressure regulator

device which maintains a constant downstream pressure within a fixed range, independent of the

upstream pressure and/or the gas rate

Note 1 to entry: Only appliances with pressure regulator are considered regulated appliances.

3.2.1.7
gas rate control

tap or equivalent component which allows the gas supply to one or more burners to be opened or closed,

and possibly, the burner or burners to be adjusted to a gas input lower than the nominal heat input

3.2.1.8
touch control

indirect manual burner control resulting from finger contact or light touch, with or without movement

on the contact surface
3.2.1.9
indirect control

control that commands a shut-off or gas regulating device via some auxiliary energy (e.g. electric,

pneumatic, etc.)
3.2.1.10
primary air

air entrained in the burner by gas flow and which is mixed upstream of the burner

3.2.1.11
primary aeration adjuster

device which allows the primary air rate to be set at a desired value, according to the supply conditions

Note 1 to entry: The operation of changing the setting of the device is called “adjusting the primary aeration”.

3.2.1.12
injector
component which admits gas into a burner
3.2.1.13
heat bearing fluid

intermediary fluid that indirectly conveys the heat from a burner to the food or cooking container

3.2.2 Terminology referring to the burner
3.2.2.1
main burner

burner which performs the heating function of the appliance and is often called simply “burner”

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SIST EN 203-1:2022
EN 203-1:2021 (E)
3.2.2.2
auxiliary burner

burner which allows, by means of an ignition burner or pilot, ignition of a main burner

3.2.2.3
ignition burner or pilot
burner intended to ignite the main burner or at first an auxiliary burner

Note 1 to entry: If a burner operates independently of the main burners, it is called “pilot”.

3.2.2.4
alternating ignition burner

ignition burner which goes off as soon as the main burner is ignited and is ignited from the main burner

just before the main burner is extinguished
3.2.2.5
permanent ignition burner
ignition burner which remains ignited even when the main burner is in use
3.2.3 Terminology referring to the combustion circuit
3.2.3.1
combustion circuit

circuit including the air supply duct, if it exists, the combustion chamber, the heat exchanger and the

combustion products evacuation duct, if it exists
3.2.3.2
combustion products circuit

circuit including the combustion chamber, the heat exchanger and the combustion products evacuation

duct if it exists
3.2.3.3
combustion chamber
enclosure in which the air/gas mixture burns
3.2.3.4
flue outlet

part of an appliance intended to be connected to a combustion products evacuation duct

3.2.3.5
draught diverter

device placed in the combustion products circuit of type B appliances, which is intended to reduce the

influence of the flue pull and down draught on the burner performance and combustion

3.2.3.6
combustion products outlet or flueway extension

part of an appliance not connected to a flue, through which products of combustion are discharged into a

room
3.2.3.7
combustion products discharge safety device

device that at least shuts off the main burner when there is an unacceptable spillage of combustion

products at the draught diverter of type B appliances
11BS
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SIST EN 203-1:2022
EN 203-1:2021 (E)
3.2.3.8
purging

act of forcing air into the combustion circuit to expel any remaining gas/air mixture or products of

combustion

Note 1 to entry: Pre-purging is a purging that takes place between the starting demand and the activation of the

ignition device.
3.2.3.9
control device for aeration or evacuation of combustion products

device which causes shutdown in the event of abnormal aeration or combustion products evacuation

conditions
3.2.3.10
gas/air ratio device

device which automatically adjusts the combustion air flow to the gas flow and vice versa

3.2.4 Terminology referring to the auxiliary equipment
3.2.4.1
auxiliary equipment

all the devices of an appliance which act directly or indirectly on the gas rate (e.g. gas rate control, flame

supervision device, governor, thermostat, etc.)
3.2.4.2
ignition device

means used to light gas admitted to the ignition burner, auxiliary burner or main burner, which may or

may not be fixed to the appliance
3.2.4.3
flame supervision device

device which, on the extinguishment of the supervised flame, shuts off the gas supply

Note 1 to entry: It is described as having “simple control” if it shuts off the gas supply to the main burner only.

Note 2 to entry: It is described as having “complete control” if it shuts off the gas supply to the main burner and

to the ignition burner.
3.2.4.3.1
ignition time

time interval between the ignition of the supervised flame and the moment when the force thus produced

is sufficient to keep the valve open
3.2.4.3.2
ignition safety time
TSA

time that elapses between the input to open the gas supply to the burner and the gas supply being shut

off in the event no flame has been detected
3.2.4.3.3
flame detector

part of the flame supervision device sensing element on which the supervised flame acts directly and

transforms the flame effect into a signal which is transmitted directly or indirectly to a shut off valve

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SIST EN 203-1:2022
EN 203-1:2021 (E)
3.2.4.3.4
extinction safety time
TSE

time that elapses between extinguishment of the supervised flame and the input to shut off the gas supply

to the burner
3.2.4.3.5
closing time

time interval between the interruption of the auxiliary energy or the voltage and the achievement of the

closed position
3.2.4.3.6
ignition rate
ign

average heat input during the ignition safety time, expressed as a percentage of the nominal heat input

3.2.4.3.7
spark restoration

automatic process by which, following flame failure, the ignition device is switched on again without total

interruption of the gas supply
3.2.4.3.8
recycling

automatic process by which, after loss of flame during operation, the gas supply is interrupted, and the

full start procedure is re-initiated automatically
3.2.4.3.9
non-volatile lockout of the appliance

safety shutdown such that a restart can only be accomplished by manual reset and by no other means

3.2.4.3.10
volatile lock-out of the appliance

safety shutdown such that a restart can only be accomplished by either the manual reset, or an

interruption of the electrical supply and its subsequent restoration
3.2.4.4
temperature regulator (thermostat)

device which controls the operation of the appliance (by on/off, on/low or modulating control),

maintaining a predetermined temperature within the given limits of operation
3.2.4.5
overheat limit device

manually reset device which ensures that temperature is limited to a predetermined safety value

Note 1 to entry: Overheat limit device is not a regulating device.
3.2.4.6
control knob

component which is moved by hand and operates an appliance control device (e.g. tap, thermostat, etc.)

3.2.5
functional surface
part of the appliance which is hot for the appliance to fulfil its function
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SIST EN 203-1:2022
EN 203-1:2021 (E)
3.2.6
marking
permanent indication on the appliance
3.2.7
removable part
part that can be removed or opened without the aid of a tool, a
...

SLOVENSKI STANDARD
oSIST prEN 203-1:2019
01-marec-2019
Plinske naprave za gostinstvo - 1. del: Splošna varnostna pravila
Gas heated catering equipment - Part 1: General safety rules
Großküchengeräte für gasförmige Brennstoffe - Teil 1: Allgemeine
Sicherheitsanforderungen

Appareils de cuisine professionnelle utilisant les combustibles gazeux - Partie 1: Règles

générales de sécurité
Ta slovenski standard je istoveten z: prEN 203-1
ICS:
97.040.20 âWHGLOQLNLGHORYQLSXOWL Cooking ranges, working
SHþLFHLQSRGREQLDSDUDWL tables, ovens and similar
appliances
oSIST prEN 203-1:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 203-1:2019
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oSIST prEN 203-1:2019
DRAFT
EUROPEAN STANDARD
prEN 203-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2019
ICS 97.040.20 Will supersede EN 203-1:2014
English Version
Gas heated catering equipment - Part 1: General safety
rules

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 106.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations

which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC

Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.

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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 203-1:2019 E

worldwide for CEN national Members.
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oSIST prEN 203-1:2019
prEN 203-1:2019 (E)
Contents Page

European Foreword ...................................................................................................................................................... 6

1 Scope .................................................................................................................................................................... 7

2 Normative references .................................................................................................................................... 7

3 Terms and definitions ................................................................................................................................... 8

3.1 Terminology referring to gases and pressures .................................................................................... 8

3.2 Terminology referring to appliance design ........................................................................................ 10

3.2.1 Terminology referring to the gas circuit ............................................................................................. 10

3.2.2 Terminology referring to the burner .................................................................................................... 11

3.3 Terminology referring to appliance operation ................................................................................. 15

4 Classification .................................................................................................................................................. 17

5 Constructional requirements .................................................................................................................. 18

5.1 General ............................................................................................................................................................. 18

5.1.1 Conversion to different gases .................................................................................................................. 18

5.1.2 Materials and methods of construction ............................................................................................... 20

5.1.3 Use, cleaning and maintenance ............................................................................................................... 20

5.1.4 Gas connections ............................................................................................................................................ 20

5.1.5 Soundness ....................................................................................................................................................... 21

5.1.6 Supply of combustion air and evacuation of combustion products ........................................... 21

5.1.7 Flame visibility .............................................................................................................................................. 23

5.1.8 Electrical safety ............................................................................................................................................. 23

5.1.9 Construction requirements for gas cylinder compartment .......................................................... 23

5.1.10 Material in contact with food ................................................................................................................... 24

5.2 Particular requirements for components in the gas circuit ......................................................... 24

5.2.1 General ............................................................................................................................................................. 24

5.2.2 Gas rate control and shut-off device ...................................................................................................... 24

5.2.3 Auxiliary equipment ................................................................................................................................... 26

5.2.4 Burners ............................................................................................................................................................ 28

5.2.5 Gas rate adjusters ........................................................................................................................................ 28

5.3 Particular requirements ............................................................................................................................ 28

5.3.1 Food spillage .................................................................................................................................................. 28

5.3.2 Stability and mechanical safety .............................................................................................................. 29

5.3.3 Safety from fire risk ..................................................................................................................................... 29

5.3.4 Appliances connected to water mains .................................................................................................. 29

5.3.5 Pressurized parts ......................................................................................................................................... 29

5.3.6 Lack of heat-bearing fluid ......................................................................................................................... 29

6 Performance requirements ...................................................................................................................... 30

6.1 Soundness ....................................................................................................................................................... 30

6.1.1 Soundness of the gas circuit ..................................................................................................................... 30

6.1.2 Soundness of combustion product circuit of type B appliances .................................................. 30

6.2 Obtaining the gas rate................................................................................................................................. 30

6.2.1 Nominal heat input (Q ) ............................................................................................................................. 30

6.2.2 Full calorific rate .......................................................................................................................................... 31

6.2.3 Reduced heat input ...................................................................................................................................... 31

6.2.4 Ignition burner heat input ........................................................................................................................ 31

6.3 Safety of operation ....................................................................................................................................... 31

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oSIST prEN 203-1:2019
prEN 203-1:2019 (E)

6.3.1 Burners ............................................................................................................................................................. 31

6.3.2 Temperature limits ...................................................................................................................................... 31

Table 1 — Temperature limits during normal operation ............................................................................ 32

Table 2 — Temperature limits during abnormal operation ....................................................................... 32

6.3.3 Ignition – cross-lighting - flame stability ............................................................................................. 33

6.3.4 Combustion products discharge safety devices for type B appliances ............................... 33

11BS

Table 3 — Maximum shut-down time in relation to blockage ................................................................... 33

6.3.5 Pre-purge ......................................................................................................................................................... 34

6.4 Influence of burners on each other ........................................................................................................ 34

6.5 Auxiliary equipment .................................................................................................................................... 34

6.5.1 Flame shut off device ................................................................................................................................... 34

Table 4 — Lower explosion limits and maximum admitted value of the gas/air ratio ..................... 35

6.5.2 Ignition device ............................................................................................................................................... 35

6.6 Air proving device ........................................................................................................................................ 36

6.6.1 General ............................................................................................................................................................. 36

6.6.2 Supervision of the combustion air or combustion products rate ............................................... 36

6.6.3 Supervision of the combustion air pressure or combustion products pressure ................... 36

6.6.4 Gas/air ratio controls .................................................................................................................................. 36

6.7 Combustion ..................................................................................................................................................... 36

6.7.1 All appliances (in calm air) ....................................................................................................................... 36

6.7.2 Special conditions ......................................................................................................................................... 37

6.8 Auxiliary energy ............................................................................................................................................ 37

6.8.1 Electrical energy fluctuation .................................................................................................................... 37

6.8.2 Electrical energy shut off ........................................................................................................................... 37

6.8.3 Other auxiliary energy ................................................................................................................................ 37

6.9 Rational use of energy................................................................................................................................. 37

6.10 Operating requirements - Temperature of the LPG cylinder and its compartment ............ 37

6.10.1 Temperature of the walls of the compartment .................................................................................. 37

6.10.2 Temperature of the LPG cylinder ........................................................................................................... 37

Table 5 — Maximum pressure increase inside the LPG cylinder .............................................................. 38

7 Test conditions .............................................................................................................................................. 38

7.1 General ............................................................................................................................................................. 38

7.1.1 Characteristics of the test gases .............................................................................................................. 38

7.1.2 Requirements for making up test gases ............................................................................................... 38

7.1.3 Test room ......................................................................................................................................................... 38

7.1.4 Preparation of the appliance .................................................................................................................... 38

7.1.5 Practical method of test.............................................................................................................................. 39

7.1.6 Test pressures................................................................................................................................................ 39

7.1.7 Carrying out the tests .................................................................................................................................. 39

7.2 Soundness ........................................................................................................................................................ 40

7.2.1 Soundness of the gas circuit ...................................................................................................................... 40

7.2.2 Soundness of the combustion circuit and correct evacuation of the combustion

products for type B appliances ................................................................................................................ 40

7.3 Obtaining gas rates ...................................................................................................................................... 41

7.3.1 General ............................................................................................................................................................. 41

7.3.2 Nominal heat input ...................................................................................................................................... 41

7.3.3 Full rate ............................................................................................................................................................ 44

7.3.4 Reduced rate .................................................................................................................................................. 44

7.4 Operational safety ........................................................................................................................................ 44

7.4.1 Burners ............................................................................................................................................................. 44

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oSIST prEN 203-1:2019
prEN 203-1:2019 (E)

7.4.2 Limit temperatures ..................................................................................................................................... 45

7.4.3 Ignition – cross - lighting - flame stability ........................................................................................... 46

Table 6 — Reference values for excess air determination .......................................................................... 49

7.5 Auxiliary equipment ................................................................................................................................... 50

7.5.1 Flame shut off device .................................................................................................................................. 50

7.5.2 Ignition device ............................................................................................................................................... 51

7.6 Combustion .................................................................................................................................................... 51

7.6.1 General ............................................................................................................................................................. 51

Table 7 — (CO )N concentration of the combustion products, in percent ............................................ 52

7.6.2 Tests carried out under normal conditions ........................................................................................ 52

7.6.3 Specific test for type B appliances .......................................................................................................... 53

7.6.4 Test with sooting limit gas ........................................................................................................................ 54

7.7 Air-proving device ....................................................................................................................................... 54

7.7.1 General ............................................................................................................................................................. 54

7.7.2 Supervision of the combustion air or the combustion products rate ....................................... 55

7.7.3 Supervision of the combustion air or the combustion products pressure .............................. 55

7.8 Special tests .................................................................................................................................................... 56

7.8.1 Stability and mechanical safety .............................................................................................................. 56

7.8.2 Pressurized parts ......................................................................................................................................... 56

7.8.3 Lack of heat bearing fluid .......................................................................................................................... 56

7.9 Test method - Overheating of the LPG cylinder and its compartment ...................................... 56

7.10 Rational use of energy ................................................................................................................................ 57

8 Marking and instructions .......................................................................................................................... 57

8.1 General requirements for marking and instructions ..................................................................... 57

8.2 Marking on the appliance .......................................................................................................................... 57

8.2.1 Data plates, labels and packaging .......................................................................................................... 57

8.2.2 Additional marking on the appliance and packaging ..................................................................... 58

8.3 Instructions for installation and adjustment ..................................................................................... 58

8.3.1 Requirements for installation and adjustment ................................................................................. 58

8.3.2 Additional requirements for installation and adjustment............................................................ 59

8.4 Instructions for use and maintenance .................................................................................................. 60

8.4.1 Requirements for instructions for use and maintenance ............................................................. 60

8.4.2 Additional requirements for instructions for use and maintenance ........................................ 60

Figure 1 — Apparatus for testing soundness ................................................................................................... 62

Figure 2 — Test on type B appliances under abnormal draught conditions ........................................ 63

Figure 3 — Equipment for wind testing ............................................................................................................. 64

Figure 4 — Arrangement of the equipment for wind testing ..................................................................... 64

Figure 5 — Test rig for combustion products evacuation safety device ................................................ 65

Figure 6 — Example of sampling probe for appliances with a mitre ....................................................... 66

Figure 7 — Example of sampling probe for appliances of type A and B with a chimney .................. 67

Annex A (informative) National situations ........................................................................................................ 68

A.1 Connection requirements in force in various countries (see 5.1.4) .......................................... 68

Table A.1 — Types of connection used in various countries ...................................................................... 68

A.2 Requirements for flue connection in force in various countries (see 5.1.6.5)....................... 69

Table A.2 — Diameters of flues used in various countries .......................................................................... 69

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prEN 203-1:2019 (E)

A.3 Categories, test gases and test pressures ............................................................................................. 70

Annex B (normative) Use of symbols on appliances and packaging ......................................................... 71

B.1 General ............................................................................................................................................................. 71

B.2 Electric power supply.................................................................................................................................. 71

B.3 Type of gas ....................................................................................................................................................... 71

Table B.1 — Symbolization of gas type ............................................................................................................... 71

B.4 Gas supply pressure ..................................................................................................................................... 72

B.5 Country of destination ................................................................................................................................ 72

B.6 Category ........................................................................................................................................................... 72

B.7 Other optional information....................................................................................................................... 72

B.8 Nominal heat input of burner .................................................................................................................. 72

B.9 Nominal heat input of set of burners on appliance .......................................................................... 72

Annex C (informative) Trilingual list of appliances in the scope of EN 203-1 and

corresponding Part 2 .................................................................................................................................. 73

Annex D (informative) Composition of the gas circuit ................................................................................... 75

D.1 Minimum requirements for: ..................................................................................................................... 75

D.2 Minimum requirements for appliances with fan, without permanent or alternating

ignition burner and without pre-purge ................................................................................................ 76

Annex E (normative) Material in contact with food ........................................................................................ 77

Table E.1 — Requirements concerning the aspects of matérials in contact with food ...................... 77

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Regulation (EU) 2016/426 aimed to be covered ............................................. 80

Table ZA.1 — Correspondence between this European Standard and Annex I of Regulation

(EU) 2016/426 ............................................................................................................................................... 80

Bibliography ................................................................................................................................................................. 82

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oSIST prEN 203-1:2019
prEN 203-1:2019 (E)
European Foreword

This document (prEN 203-1:2019) has been prepared by Technical Committee CEN/TC 106 “Gas heated

catering equipment”, the secretariat of which is held by AFNOR.
This document is submitted to the CEN Enquiry.
This document will supersede EN 203-1:2014.

This document has been prepared under a standardization request (under drafting) given to CEN by the

European Commission and the European Free Trade Association, and supports essential requirements

of EU Directive(s).

For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this

document.

This document constitutes Part 1 of EN 203, Gas heated catering equipment. Particular requirements are

given in the relevant Part 2: Specific requirements.
The main changes compared to the former version are the following:
• Update of the scope to further clarify that appliances are to be used indoor;

• alignment with the Gas Appliances Regulation and the Vademecum on European standardization in

support of Union legislation and policies based on Standardization Request/Mandate (under

drafting);

• Introduction of reference to EN 1672-2:2005+A1:2009 for the verification of materials and parts in

contact with food and other hygiene aspects as consequence of the withdrawal of EN 203-3;

• Revision of the text in 5 for clarification of its contents and addition of specific compliance criteria

when missing;
• Addition of the adjustement of the sequential function control (7.6.2.1).
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oSIST prEN 203-1:2019
prEN 203-1:2019 (E)
1 Scope

This document specifies the general requirements and the constructional and operating characteristics

relating to safety and rational use of energy, with the associated test methods for gas heated

commercial catering and bakery appliances intended to be used indoor.
The specific requirements are given in Part 2.
Only appliances of ty
...

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