Automatic burner control systems for burners and appliances burning gaseous or liquid fuels

EN 13611:2019, Clause 1 is replaced by the following:
This document specifies the safety, design, construction and performance requirements, and testing for automatic burner control systems, programming units, flame detector devices and High Temperature Operation (HTO) detectors, intended for use with gas and oil burners and gas and oil burning appliances, with or without fans and similar use.
This document is applicable to automatic burner control systems that include additional functions.
This document is not applicable to automatic burner control systems utilizing thermo-electric flame supervision devices.
NOTE    Standards for burners, appliances or processes which use automatic burner control systems, programming units, flame detectors or HTO detectors can override the requirements of this document.

Feuerungsautomaten für Brenner und Brennstoffgeräte für gasförmige oder flüssige Brennstoffe

EN 13611:2019, Abschnitt 1, wird durch Folgendes ersetzt:
Dieses Dokument legt die Anforderungen für Sicherheit, Bau und Funktion von Feuerungsautomaten, Steuergeräten und Flammen- und HTO-Wächtern für Gas- und Ölbrenner und für Gas- und Ölgeräte mit oder ohne Gebläse und ähnliche Verwendungszwecke fest.
Dieses Dokument gilt für Feuerungsautomaten, die zusätzliche Funktionen enthalten.
Feuerungsautomaten, die thermoelektrische Flammenüberwachungseinrichtungen verwenden, sind nicht Gegenstand dieses Dokuments.
ANMERKUNG 1 Europäische Normen für Brenner, Geräte oder Prozesse, die Feuerungsautomaten, Steuergeräte bzw. Flammen- oder HTO-Wächter verwenden, können Vorrang vor den Anforderungen der vorliegenden Norm haben.
ANMERKUNG 2 Festlegungen für die Produktionskontrolle sind nicht Gegenstand dieses Dokuments.

Systèmes automatiques de commande pour brûleurs et appareils utilisant des combustibles gazeux ou liquides

L'article 1 de la norme EN 13611:2019 est remplacé par ce qui suit :
Ce document spécifie les exigences de sécurité, de construction et de fonctionnement, et les essais des systèmes automatiques de commande des brûleurs, des unités de programmation ainsi que des dispositifs de détection de flamme et des détecteurs OHT pour les brûleurs et les appareils à gaz et à fioul, avec ou sans ventilateur.
Ce document est applicable aux systèmes automatiques de commande des brûleurs, comportant des fonctions additionnelles.
Ce document ne concerne pas les systèmes automatiques de commande des brûleurs utilisant des dispositifs de détection de flamme thermoélectriques.
NOTE   Les normes européennes pour brûleurs, appareils ou processus qui mettent en œuvre des systèmes automatiques de commande des brûleurs, des unités de programmation ou des dispositifs de détection de flamme ou des détecteurs OHT, peuvent être considérées comme prioritaires par rapport à la présente norme.

Naprave za avtomatski nadzor gorilnikov in aparatov na plin ali tekoča goriva

General Information

Status
Published
Publication Date
15-Nov-2022
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
16-Nov-2022
Due Date
11-Aug-2022
Completion Date
16-Nov-2022

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SLOVENSKI STANDARD
SIST EN 298:2023
01-februar-2023
Nadomešča:
SIST EN 298:2012
Naprave za avtomatski nadzor gorilnikov in aparatov na plin ali tekoča goriva

Automatic burner control systems for burners and appliances burning gaseous or liquid

fuels
Feuerungsautomaten für Brenner und Brennstoffgeräte für gasförmige oder flüssige
Brennstoffe
Systèmes automatiques de commande pour brûleurs et appareils utilisant des
combustibles gazeux ou liquides
Ta slovenski standard je istoveten z: EN 298:2022
ICS:
27.060.10 Gorilniki na tekoče in trdo Liquid and solid fuel burners
gorivo
27.060.20 Plinski gorilniki Gas fuel burners
SIST EN 298:2023 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN 298:2023
---------------------- Page: 2 ----------------------
SIST EN 298:2023
EN 298
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2022
EUROPÄISCHE NORM
ICS 27.060.01 Supersedes EN 298:2012
English Version
Automatic burner control systems for burners and
appliances burning gaseous or liquid fuels

Systèmes automatiques de commande pour brûleurs et Feuerungsautomaten für Brenner und

appareils utilisant des combustibles gazeux ou liquides Brennstoffgeräte für gasförmige oder flüssige

Brennstoffe
This European Standard was approved by CEN on 2 October 2022.

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, Türkiye 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

© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 298:2022 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 298:2023
EN 298:2022 (E)
Contents Page

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

Introduction .......................................................................................................................................................... 5

1 Scope .......................................................................................................................................................... 6

2 Normative references .......................................................................................................................... 6

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

4 Classification......................................................................................................................................... 16

4.1 Classes of control ................................................................................................................................ 16

4.2 Groups of control ................................................................................................................................ 16

4.3 Classes of control functions ............................................................................................................. 16

4.4 Types of DC supplied controls ........................................................................................................ 16

5 Test conditions and uncertainty of measurements ................................................................ 16

6 Design and construction ................................................................................................................... 17

6.1 General.................................................................................................................................................... 17

6.2 Mechanical parts of the control ..................................................................................................... 17

6.3 Materials ................................................................................................................................................ 17

6.4 Gas connections ................................................................................................................................... 17

6.5 Electrical parts of the control ......................................................................................................... 17

6.6 Protection against internal faults for the purpose of functional safety .......................... 18

7 Performance ......................................................................................................................................... 21

7.1 General.................................................................................................................................................... 21

7.2 Leak-tightness ...................................................................................................................................... 21

7.3 Torsion and bending .......................................................................................................................... 21

7.4 Rated flow rate ..................................................................................................................................... 21

7.5 Durability ............................................................................................................................................... 21

7.6 Performance tests for electronic controls ................................................................................. 21

7.7 Long-term performance for electronic controls ...................................................................... 22

7.8 Data exchange ...................................................................................................................................... 23

7.101 Functional requirements ................................................................................................................. 23

8 Electrical requirements .................................................................................................................... 33

8.1 General.................................................................................................................................................... 33

8.2 Protection by enclosure.................................................................................................................... 33

9 Electromagnetic compatibility (EMC) ......................................................................................... 34

9.1 Protection against environmental influences .......................................................................... 34

9.2 Supply voltage variations below 85 % of rated voltage ........................................................ 35

9.3 Voltage dips and interruptions ...................................................................................................... 35

9.4 Supply frequency variations ........................................................................................................... 36

9.5 Surge immunity tests ......................................................................................................................... 36

9.6 Electrical fast transient/burst ........................................................................................................ 37

9.7 Immunity to conducted disturbances induced by radio frequency fields ..................... 37

9.8 Immunity to radiated disturbances induced by radio frequency fields ......................... 37

9.9 Electrostatic discharge tests ........................................................................................................... 37

9.10 Power frequency magnetic field immunity tests ..................................................................... 38

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SIST EN 298:2023
EN 298:2022 (E)

9.11 Harmonics and interharmonics including mains signalling at a. c. power port, low

frequency immunity tests ................................................................................................................ 38

10 Marking, instructions ........................................................................................................................ 38

10.1 Marking .................................................................................................................................................. 38

10.2 Instructions ........................................................................................................................................... 38

10.3 Warning notice .................................................................................................................................... 40

Annex A (informative) Abbreviations and symbols ............................................................................ 41

Annex B (informative) Leak-tightness tests for gas controls − volumetric method ................ 42

Annex C (informative) Leak-tightness tests for gas controls − pressure loss method ........... 43

Annex D (normative) Calculation of pressure loss into leakage rate ........................................... 44

Annex E (normative) Electrical/electronic component fault modes ............................................ 45

Annex F (normative) Additional requirements for safety accessories and pressure

accessories as defined in EU Directive 2014/68/EU ............................................................. 47

Annex G (normative) Materials for pressurized parts ....................................................................... 48

Annex H (informative) Additional materials for pressurized parts .............................................. 49

Annex I (normative) Requirements for controls used in DC supplied burners and appliances

burning gaseous or liquid fuels ..................................................................................................... 50

Annex J (normative) Method for the determination of a Safety Integrity Level (SIL) ............ 52

Annex K (normative) Method for the determination of a Performance Level (PL) ................ 53

Annex L (informative) Relationship between Safety Integrity Level (SIL) and Performance

Level (PL) ............................................................................................................................................... 54

Annex M (normative) Reset functions ..................................................................................................... 55

Annex N (informative) Guidance document on Environmental Aspects ..................................... 56

Annex O (normative) Seals of elastomer, cork and synthetic fibre mixtures ............................ 57

Annex AA (informative) Functional characteristics of automatic burner control systems, to

be given by the appliance standard ............................................................................................. 58

Annex BB (informative) Fault modes of flame sensors ...................................................................... 59

Annex CC (informative) Functional diagrams of automatic burner control systems for oil 61

CC.1 Symbols .................................................................................................................................................. 61

CC.2 Explanations ......................................................................................................................................... 62

CC.3 Functional diagrams – Normal operation .................................................................................. 62

CC.4 Functional diagrams – protective response in case of abnormal operation in the

application ............................................................................................................................................ 64

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

requirements of Directive 2009/142/EC aimed to be covered ......................................... 66

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

requirements of Regulation (EU) 2016/426 aimed to be covered ................................... 67

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

requirements of Directive 2014/68/EU aimed to be covered ........................................... 68

Bibliography ....................................................................................................................................................... 69

---------------------- Page: 5 ----------------------
SIST EN 298:2023
EN 298:2022 (E)
European foreword

This document (EN 298:2022) has been prepared by Technical Committee CEN/TC 58 “Safety and

control devices for burners and appliances burning gaseous or liquid fuels”, the secretariat of which is

held by BSI.

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 May 2023, and conflicting national standards shall be

withdrawn at the latest by November 2025.

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 298:2012.

In comparison with the previous edition, the following significant changes have been incorporated in this

document:
a) alignment with EN 13611:2019, as impacted by EN 13611:2019/AC:2021;

b) inclusion of Annex J, Annex K, Annex L, Annex M, Annex N, Annex O, Annex ZB and Annex ZC;

c) alignment with Regulation (EU) 2016/426 on appliances burning gaseous fuels (GAR) and addition

of Annex ZB;
d) addition of the high-temperature operation (HTO).

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, Türkiye and the United

Kingdom.
---------------------- Page: 6 ----------------------
SIST EN 298:2023
EN 298:2022 (E)
Introduction
This document is intended to be used in conjunction with EN 13611:2019.

This document refers to clauses of EN 13611:2019 or adapts clauses by stating “with the following

modification”, “with the following addition”, “is replaced by the following” or “is not applicable” in the

corresponding clause.

This document adds clauses or subclauses to the structure of EN 13611:2019 which are particular to this

document. Subclauses which are additional to those in EN 13611:2019 are numbered starting from 101.

Additional Annexes are designated as Annex AA, Annex BB, Annex CC, etc. It should be noted that these

clauses, subclauses and Annexes are not indicated as an addition.

If by reference to EN 13611:2019 the term “control” is given, this term should be read as automatic

burner control systems, flame detector devices or HTO detectors.

EN 298 compliance for automatic burner control systems, flame detector devices or HTO detectors

cannot be claimed based upon SIL classification according to the EN 61508 series.

SIL classification cannot be claimed based upon compliance with this standard only. A supplementary

method for SIL determination is specified in EN 13611:2019, Annex J.
---------------------- Page: 7 ----------------------
SIST EN 298:2023
EN 298:2022 (E)
1 Scope
EN 13611:2019, Clause 1 is replaced by the following:

This document specifies the safety, design, construction and performance requirements, and testing for

automatic burner control systems, programming units, flame detector devices and High Temperature

Operation (HTO) detectors, intended for use with gas and oil burners and gas and oil burning appliances,

with or without fans and similar use.

This document is applicable to automatic burner control systems that include additional functions.

This document is not applicable to automatic burner control systems utilizing thermo-electric flame

supervision devices.

NOTE Standards for burners, appliances or processes which use automatic burner control systems,

programming units, flame detectors or HTO detectors can override the requirements of this document.

2 Normative references
Shall be according to EN 13611:2019, Clause 2 with the following additions:

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.

EN 267:2020, Forced draught burners for liquid fuels

EN 1643:2022, Safety and control devices for burners and appliances burning gaseous and/or liquid fuels

— Valve proving systems for automatic shut-off valves

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

— General requirements

EN 60730-1:2016 , Automatic electrical controls — Part 1: General requirements (IEC 60730-1:2013,

modified)

EN 60730-2-5:2015 , Automatic electrical controls — Part 2-5: Particular requirements for automatic

electrical burner control systems (IEC 60730-2-5:2013)

EN 60947-5-1:2017 , Low-voltage switchgear and controlgear — Part 5-1: Control circuit devices and

switching elements — Electromechanical control circuit devices (IEC 60947-5-1:2016, modified)

EN 61810-1:2015 , Electromechanical elementary relays — Part 1: General and safety requirements

(IEC 61810-1:2015)

EN ISO/IEC 80079-20-1:2019, Explosive atmospheres — Part 20-1: Material characteristics for gas and

vapour classification — Test methods and data (ISO/IEC 80079-20-1:2017, including Cor 1:2018)

As impacted by EN 13611:2019/AC:2021.
As impacted by EN 60730-1:2016/A1:2019 and EN 60730-1:2016/A2:2022.
As impacted by EN 60730-2-5:2015/A1:2019 and EN 60730-2-5:2015/A2:2021.
As impacted by EN 60947-5-1:2017/AC:2020-05.

As impacted by EN 61810-1:2015/AC:2017-07, EN 61810-1:2015/AC:2018-04 and EN 61810-1:2015/A1:2020.

---------------------- Page: 8 ----------------------
SIST EN 298:2023
EN 298:2022 (E)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 13611:2019 apply with the

following modifications.

ISO and IEC maintain terminology 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/
3.23
safety shutdown
EN 13611:2019, 3.23 is replaced by 3.120
3.101
flame detector device
device by which the presence of a flame is detected and signalled

Note 1 to entry: Flame detector devices can consist of a flame sensor, an amplifier and a relay for signal

transmission. These parts, with the possible exception of the actual flame sensor, can be assembled in a single

housing for use in conjunction with a programming unit.

Note 2 to entry: Figure 1 contains an example of the composition of a flame detector device.

Key
1 automatic burner control system (see 3.110) 8 programming unit (see 3.109)
2 flame detector device (see 3.101) 9 shut-off valve (see 3.104)
3 flame 10 shut-off valve terminal
4 flame sensor (see 3.103) 11 flame signal (see 3.107)
5 amplifier 12 flame failure response time (see 3.105.1)
6 filter 13 sensed flame (see 3.106)
7 threshold
Figure 1 — Basic functional chain of a typical flame supervision
---------------------- Page: 9 ----------------------
SIST EN 298:2023
EN 298:2022 (E)
3.102
independent flame detector device
flame detector device which operates independent of the programming unit

Note 1 to entry: Self-checking functions are incorporated in this type of flame detector device.

Note 2 to entry: Figure 2 shows an example of the composition of a flame detector device.

Key
1 independent flame detector device (see 3.102) 6 threshold
2 flame 7 flame signal (see 3.107)
3 flame sensor (see 3.103) 8 flame failure detection time (see 3.105.2)
4 amplifier 9 sensed flame (see 3.106)
5 filter
Figure 2 — Basic functional chain of an independent flame detector device
3.103
flame sensor

device which reacts to the presence of the flame by providing an output signal that is used for further

signal processing
3.104
shut-off valve

safety device which releases the fuel flow when energized and stops the fuel flow automatically when de-

energized

Note 1 to entry: For further information refer to EN 161 or EN 126 for gas and EN ISO 23553-1 for oil, or to other

similar devices if mentioned in the relevant appliance standard.
3.105
flame failure response/detection time
3.105.1
flame failure response time
FFRT

response time between the loss of a sensed flame and the resulting de-energizing of the shut-off valve

terminals

Note 1 to entry: FFRT may be referred to as “extinction safety time” in appliance standards.

---------------------- Page: 10 ----------------------
SIST EN 298:2023
EN 298:2022 (E)
3.105.2
flame failure detection time
FFDT

response time of an independent flame detector device between the loss of a sensed flame and the flame

signal indicating the absence of a flame
3.106
sensed flame
physical value of the monitored flame
3.107
flame signal
signal given by the flame detector device in case of sensed flame
3.108
flame simulation

condition which occurs when the flame signal indicates the presence of a flame when in reality no flame

is present
3.109
programming unit

unit which executes the program, reacts to signals from control and safety devices, gives the control

commands, controls the start-up sequence, supervises the burner operation and causes controlled

shutdown, and if necessary, safety shutdown and lock-out

Note 1 to entry: The programming unit follows a predetermined sequence of actions and always operates in

conjunction with a flame detector device or HTO detector.
3.110
automatic burner control system

system comprising at least a programming unit and all the elements of a flame detector device or, if

applicable, HTO detector

Note 1 to entry: The various functions of an automatic burner control system can be in one or more housings.

3.111
start position

stage where the system is not in lock-out position and has not yet received the start signal but can proceed

with the start-up sequence when required

Note 1 to entry: At this stage, the output terminals for any shut-off valve and ignition device are not energized.

3.112
start signal

signal which releases the system from its start position and commences the predetermined program

Note 1 to entry: A thermostat is an example from which such a signal could be generated.

3.113
purge

forced introduction of air through the combustion chamber and flue passages in order to displace any

remaining fuel/air mixture and/or products of combustion
---------------------- Page: 11 ----------------------
SIST EN 298:2023
EN 298:2022 (E)
3.114
pre-purge

purge which takes place between the start signal and the energization of the shut-off valve or, in the case

of gas, the energization of the ignition device, if this comes first
3.115
post-purge
purge which takes place immediately following shutdown
3.116
first safety time

interval between the pilot shut-off valve, the start shut-off valve or the main shut-off valve, as applicable,

being energized and the pilot shut-off valve, start shut-off valve or the main shut-off valve, as applicable,

being de-energized if no flame signal is present

Note 1 to entry: Where there is no second safety time, this is called the safety time.

3.117
second safety time

where there is a first safety time applicable to either a pilot or start fuel flame only, the second safety time

is the interval between the main shut-off valve being energized and the main shut-off valve being de-

energized if no main flame signal is present
3.118
running position

position of the system in which the burner is in normal operation under the supervision of the

programming unit and its flame detector device or the burner is in HTO and supervised

3.119
controlled shutdown

process by which the power to the shut-off valve(s) is removed before any other action takes place as a

result of the action of a controlling function
3.120
safety shutdown

process which is effected immediately following the response of a protection device or the detection of a

fault in the automatic burner control system and puts the burner out of operation

Note 1 to entry: The resulting state of the system is defined by deactivated terminals for the shut-off valves and

the ignition device.
3.121
lock-out
3.121.1
non-volatile lock-out

safety shutdown condition of the control, where a restart can only be accomplished by a manual reset of

the control and by no other means
3.121.2
volatile lock-out

safety shutdown condition of the control, where a restart can only be accomplished by either a manual

reset of the control, or an interruption of the main power and its subsequent restoration

---------------------- Page: 12 ----------------------
SIST EN 298:2023
EN 298:2022 (E)
3.122
ignition restoration
spark restoration

process by which, following loss of flame signal, the ignition device is switched on again without total

interruption of the fuel supply
3.123
recycling

process by which, after a safety shutdown, a full start-up sequence is automatically repeated

3.124
timings
3.124.1
waiting time

for burners without fans, interval between the start signal being given and the energization of the

ignition device or shut-off valves, whichever comes first

Note 1 to entry: During this time natural ventilation of the combustion chamber and the flue passages can take

place.
3.124.2
waiting time

interval between the start signal being given (and air registers in purge position, if applicable) and

the energization of the ignition device

Note 1 to entry: During this time natural ventilation of the combustion chamber and the flue passages takes place.

3.124.3
pre-purge time

period during which purging takes place at the proven air rate prior to the energization of the

ignition device or shut-off valves, whichever comes first
3.124.4
pre-purge time

period preceding the signal to energize the shut-off valve during which the combustion chamber is

compulsorily ventilated
3.124.5
post-purge time

period during which purging takes place at the proven air rate between any shutdown and the

moment the fan is switched off
3.124.6
post-purge time

period following the signal to de-energize the shut-off valve during which the combustion chamber

is compulsorily ventilated
3.124.7
inter-purge time

period during which purging of the combustion chamber takes place at the proven air rate after

unsuccessful ignition and prior to the next recycle attempt
---------------------- Page: 13 ----------------------
SIST EN 298:2023
EN 298:2022 (E)
3.124.8
inter-waiting time

period during which natural ventilation of the combustion chamber takes place after unsuccessful

ignition and prior to the next recycle attempt
3.125
sequences
3.125.1
start-up sequence

sequence of actions executed by the system which brings the burner from the start position to the running

position
3.125.2
first stage

part of the start-up sequence which allows the release of start fuel into the combustion chamber

3.125.3
second stage

part of the start-up sequence which allows the release of further fuel into the combustion chamber

3.126
system for permanent operation

system that is designed to remain in the running position for longer than 24 h without interruption

3.127
system for non-permanent operation
system that is designed to remain in the running position for less than 24 h
3.128
self-checking function of the flame detector device/HTO detec
...

SLOVENSKI STANDARD
oSIST prEN 298:2020
01-oktober-2020
Naprave za samodejni nadzor gorilnikov in aparatov na plin ali tekoča goriva

Automatic burner control systems for burners and appliances burning gaseous or liquid

fuels
Feuerungsautomaten für Brenner und Brennstoffgeräte für gasförmige oder flüssige
Brennstoffe
Systèmes automatiques de commande pour brûleurs et appareils utilisant des
combustibles gazeux ou liquides
Ta slovenski standard je istoveten z: prEN 298
ICS:
27.060.10 Gorilniki na tekoče in trdo Liquid and solid fuel burners
gorivo
27.060.20 Plinski gorilniki Gas fuel burners
oSIST prEN 298:2020 en,fr,de

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

---------------------- Page: 1 ----------------------
oSIST prEN 298:2020
---------------------- Page: 2 ----------------------
oSIST prEN 298:2020
DRAFT
EUROPEAN STANDARD
prEN 298
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2020
ICS 27.060.01 Will supersede EN 298:2012
English Version
Automatic burner control systems for burners and
appliances burning gaseous or liquid fuels

Systèmes automatiques de commande pour brûleurs et Feuerungsautomaten für Brenner und

appareils utilisant des combustibles gazeux ou liquides Brennstoffgeräte für gasförmige oder flüssige

Brennstoffe

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

CEN/TC 58.

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, 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.

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

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 298:2020 E

worldwide for CEN national Members.
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Contents Page

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

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

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

3 Terms and definitions ................................................................................................................................... 5

4 Classification................................................................................................................................................... 14

4.1 Classes of control .......................................................................................................................................... 14

4.2 Groups of control .......................................................................................................................................... 14

4.3 Classes of control functions ....................................................................................................................... 15

4.4 Types of DC supplied controls .................................................................................................................. 15

5 Test conditions and uncertainty of measurements .......................................................................... 15

6 Design and construction ............................................................................................................................. 15

6.1 General.............................................................................................................................................................. 15

6.2 Mechanical parts of the control ............................................................................................................... 15

6.3 Materials .......................................................................................................................................................... 15

6.4 Gas connections ............................................................................................................................................. 15

6.5 Electrical parts of the control ................................................................................................................... 15

6.6 Protection against internal faults for the purpose of functional safety .................................... 17

7 Performance ................................................................................................................................................... 19

7.1 General.............................................................................................................................................................. 19

7.2 Leak-tightness ................................................................................................................................................ 19

7.3 Torsion and bending .................................................................................................................................... 19

7.4 Rated flow rate ............................................................................................................................................... 19

7.5 Durability ......................................................................................................................................................... 19

7.6 Performance tests for electronic controls ........................................................................................... 20

7.7 Long-term performance for electronic controls ................................................................................ 20

7.8 Data exchange ................................................................................................................................................ 21

7.9 Functional requirements ........................................................................................................................... 21

8 Electrical requirements .............................................................................................................................. 31

8.1 General.............................................................................................................................................................. 31

8.2 Protection by enclosure.............................................................................................................................. 31

9 Electromagnetic compatibility (EMC) ................................................................................................... 32

9.1 Protection against environmental influences .................................................................................... 32

9.2 Supply voltage variations below 85 % of rated voltage .................................................................. 33

9.3 Voltage dips and interruptions ................................................................................................................ 33

9.4 Supply frequency variations ..................................................................................................................... 34

9.5 Surge immunity tests ................................................................................................................................... 34

9.6 Electrical fast transient/burst .................................................................................................................. 35

9.7 Immunity to conducted disturbances induced by radio frequency fields ............................... 35

9.8 Immunity to radiated disturbances induced by radio frequency fields ................................... 35

9.9 Electrostatic discharge tests ..................................................................................................................... 35

9.10 Power frequency magnetic field immunity tests ............................................................................... 36

9.11 Harmonics and interharmonics including mains signalling at a. c. power port, low

frequency immunity tests .......................................................................................................................... 36

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10 Marking, instructions .................................................................................................................................. 36

10.1 Marking ............................................................................................................................................................ 36

10.2 Instructions ..................................................................................................................................................... 36

10.3 Warning Notice .............................................................................................................................................. 38

Annex A (informative) Abbreviations and Symbols ...................................................................................... 39

Annex B (informative) Leak-tightness tests for gas controls − volumetric method .......................... 40

Annex C (informative) Leak-tightness tests for gas controls − pressure loss method ..................... 41

Annex D (normative) Calculation of pressure loss into leakage rate ..................................................... 42

Annex E (normative) Electrical/electronic component fault modes ...................................................... 43

Annex F (normative) Additional requirements for safety accessories and pressure

accessories as defined in EU Directive 2014/68/EU ....................................................................... 45

Annex G (normative) Materials for pressurized parts ................................................................................. 46

Annex H (informative) Additional materials for pressurized parts ........................................................ 47

Annex I (normative) Requirements for controls used in DC supplied burners and

appliances burning gaseous or liquid fuels ........................................................................................ 48

Annex J (normative) Method for the determination of a Safety Integrity Level (SIL) ...................... 50

Annex K (normative) Method for the determination of a Performance Level (PL) .......................... 51

Annex L (normative) Relationship between Safety Integrity Level (SIL) and Performance

Level (PL) ......................................................................................................................................................... 52

Annex M (normative) Reset functions ............................................................................................................... 53

Annex N (informative) Guidance document on Environmental Aspects ............................................... 54

Annex O (informative) Seals of elastomer, cork and synthetic fibre mixtures ................................... 55

Annex AA (informative) Functional characteristics of burner control systems, to be given

by the appliance standard ......................................................................................................................... 56

Annex BB (informative) Fault modes of flame sensors ................................................................................ 57

Annex CC (informative) Functional diagrams of oil burner control systems ...................................... 59

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

requirements of EU Directive 2009/142/EC aimed to be covered ............................................. 63

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

requirements of Regulation (EU) 2016/426 aimed to be covered ............................................. 64

Annex ZC (informative) Relationship between this European Standard and the Essential

Safety Requirements of EU Directive 2014/68/EU concerning pressure equipment ......... 67

Bibliography ................................................................................................................................................................. 68

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European foreword

This document (prEN 298:2020) has been prepared by Technical Committee CEN/TC 58 “Safety and

control devices for burners and appliances burning gaseous or liquid fuels”, the secretariat of which is

held by BSI.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of EU Directive(s).

For the relationship of this document with EU Directive(s), see informative Annex ZA, ZB and ZC which

is an integral part of this document.
This document will supersede EN 298:2012.

This document refers to clauses of EN 13611:2019 and adapts them, indicating the changes by stating

“with the following modification”, “with the following addition”, “is replaced by the following” or “is not

applicable”. It also adds clauses or subclauses to the structure of EN 13611:2019 which are particular to

this standard (EN 298:2020). Additional subclauses or annexes are either numbered starting from 101

or are designated as Annex AA, Annex BB, Annex CC etc. It should be noted however that these clauses

and subclauses are not indicated as additions in the text.

The following is a list of significant technical changes between this document and the previous editions:

• Alignment with EN 13611:2019;
• Inclusion of Annex J, Annex K and Annex L;

• Alignment with Regulation (EU) 2016/426 on appliances burning gaseous fuels (GAR). and addition

of Annex ZB

EN 298 compliance for burner control systems, flame detector devices or HTO detectors cannot be

claimed based upon SIL classification according to EN 61508.
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1 Scope
EN 13611:2019, 1 is replaced by the following:

This document specifies the safety, construction and performance requirements for automatic burner

control systems, programming units, flame detector devices and HTO detectors, intended for use with

gas and oil burners and gas and oil burning appliances, with or without fans and similar use.

This document is applicable to automatic burner control systems that include additional functions.

This document does not cover automatic burner control systems utilizing thermo-electric flame

supervision devices.

NOTE 1 European Standards for burners, appliances or processes which use automatic burner control systems,

programming units, flame detectors or HTO detectors can override the requirements of this standard.

NOTE 2 Provisions for production control are not part of this document.
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.

EN 267:2020, Forced draught burners for liquid fuels

prEN 1643:2020, Valve proving systems for automatic shut-off valves for gas burners and gas appliances

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

fuels - General requirements

EN 60730-1:2016+A1:2019, Automatic electrical controls - Part 1: General requirements (IEC 60730

1:2013, modified + COR1:2014 + A1:2015)

EN 60730-2-5:2015+A1:2019, Automatic electrical controls - Part 2-5: Particular requirements for

automatic electrical burner control systems (IEC 60730 2 5:2013, modified + A1:2017)

EN 60947-5-1:2017, Low-voltage switchgear and controlgear - Part 5-1: Control circuit devices and

switching elements - Electromechanical control circuit devices
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 13611:2019 and the following

apply.

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 http://www.iso.org/obp
3.101
flame detector device
device by which the presence of a flame is detected and signalled (see Figure 1)

Note 1 to entry: Flame detector devices can consist of a flame sensor, an amplifier and a relay for signal

transmission. These parts, with the possible exception of the actual flame sensor, can be assembled in a single

housing for use in conjunction with a programming unit.
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Key
1 automatic burner control system (see 3.110) 8 programming unit (see 3.109)
2 flame detector device (see 3.101) 9 shut-off valve (see 3.104)
3 flame 10 shut-off valve terminal
4 flame sensor (see 3.103) 11 flame signal (see 3.107)
5 amplifier 12 flame failure response time (see 3.105.1)
6 filter 13 sensed flame (see 3.106)
7 threshold
Figure 1 — Basic functional chain of a typical flame supervision
3.102
independent flame detector device

flame detector device which operates independent of the programming unit to provide the class C

control function (see Figure 2)

Note 1 to entry: Self-checking functions are incorporated in this type of flame detector device.

Key
1 independent flame detector device (see 3.102) 6 threshold
2 flame 7 flame signal (see 3.107)
3 flame sensor (see 3.103) 8 flame failure detection time (see 3.105.2)
4 amplifier 9 sensed flame (see 3.106)
5 filter
Figure 2 — Basic functional chain of an independent flame detector device
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3.103
flame sensor

device which reacts to the presence of the flame by providing an output signal that is used for further

signal processing
3.104
shut-off valve

safety device which releases the fuel flow when energized and stops the fuel flow automatically when

de-energized

Note 1 to entry: For further information refer to EN 161 or EN 126 for gas and EN ISO 23553-1 for oil, or to

other similar devices if mentioned in the relevant appliance standard.
3.105
time in case of flame failure
3.105.1
flame failure response time
FFRT

response time between the loss of a sensed flame and the resulting de-energizing of the shut-off valve

terminals

Note 1 to entry: FFRT may be referred to as “extinction safety time” in appliance standards.

3.105.2
flame failure detection time
FFDT

response time of an independent flame detector device between the loss of a sensed flame and the

flame signal indicating the absence of a flame
3.106
sensed flame
physical value of the monitored flame
3.107
flame signal
signal given by the flame detector device in case of sensed flame
3.108
flame simulation

condition which occurs when the flame signal indicates the presence of a flame when in reality no flame

is present
3.109
programming unit

unit which executes the program, reacts to signals from control and safety devices, gives the control

commands, controls the start-up sequence, supervises the burner operation and causes controlled

shutdown, and if necessary, safety shutdown and lock-out

Note 1 to entry: The programming unit follows a predetermined sequence of actions and always operates in

conjunction with a flame detector device or HTO detector.
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3.110
automatic burner control system

system comprising at least a programming unit and all the elements of a flame detector device or, if

applicable, HTO detector

Note 1 to entry: The various functions of an automatic burner control system can be in one or more housings.

3.111
start position

stage where the system is not in lock-out position and has not yet received the start signal but can

proceed with the start-up sequence when required

Note 1 to entry: At this stage, the output terminals for any shut-off valve and ignition device are not energized.

3.112
start signal

signal (e.g. from a thermostat) which releases the system from its start position and commences the

predetermined program
3.113
purge

forced introduction of air through the combustion chamber and flue passages in order to displace any

remaining fuel/air mixture and/or products of combustion
3.114
pre-purge

purge which takes place between the start signal and the energization of the shut-off valve or, in the

case of gas, the energization of the ignition device, if this comes first
3.115
post-purge
purge which takes place immediately following shutdown
3.116
first safety time

interval between the pilot shut-off valve, the start shut-off valve or the main shut-off valve, as

applicable, being energized and the pilot shut-off valve, start shut-off valve or the main shut-off valve, as

applicable, being de-energized if no flame signal is present

Note 1 to entry: Where there is no second safety time, this is called the safety time.

3.117
second safety time

where there is a first safety time applicable to either a pilot or start fuel flame only, the second safety

time is the interval between the main shut-off valve being energized and the main shut-off valve being

de-energized if no main flame signal is present
3.118
running position

position of the system in which the burner is in normal operation under the supervision of the

programming unit and its flame detector device or the burner is in HTO and supervised

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3.119
controlled shutdown

process by which the power to the shut-off valve(s) is removed before any other action takes place as a

result of the action of a controlling function
3.120
safety shutdown

process which is effected immediately following the response of a protection device or the detection of

a fault in the automatic burner control system and puts the burner out of operation

Note 1 to entry: The resulting state of the system is defined by deactivated terminals for the shut-off valves and

the ignition device.
3.121
lock-out
Note 1 to entry: Lock-out can mean non-volatile lock-out or volatile lock-out.
3.121.1
non-volatile lock-out

safety shutdown condition of the system, where a restart can only be accomplished by the manual reset

of the system and by no other means
3.121.2
volatile lock-out

safety shutdown condition of the system, where a restart can only be accomplished by either the

manual reset of the system, or an interruption of the main power and its subsequent restoration

3.122
Ignition restoration
spark restoration

process by which, following loss of flame signal, the ignition device is switched on again without total

interruption of the fuel supply
3.123
recycling

process by which, after a safety shutdown, a full start-up sequence is automatically repeated

3.124
timings
3.124.1
waiting time

for burners without fans, interval between the start signal being given and the energization of the

ignition device or shut-off valves, whichever comes first

Note 1 to entry: During this time natural ventilation of the combustion chamber and the flue passages can take

place.
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3.124.2
waiting time

interval between the start signal being given (and air registers in purge position, if applicable) and

the energization of the ignition device

Note 1 to entry: During this time natural ventilation of the combustion chamber and the flue passages takes

place.
3.124.3
pre-purge time

period during which purging takes place at the proven air rate prior to the energization of the

ignition device or shut-off valves, whichever comes first
3.124.4
pre-purge time

period preceding the signal to open the shut-off valve during which the combustion chamber is

compulsorily ventilated
3.124.5
post-purge time

period during which purging takes place at the proven air rate between any shutdown and the

moment the fan is switched off
3.124.6
post-purge time

period following the signal to close the shut-off valve during which the combustion chamber is

compulsorily ventilated
3.124.7
inter-purge time

period during which purging of the combustion chamber takes place at the proven air rate after

unsuccessful ignition and prior to the next recycle attempt
3.124.8
inter-waiting time

period during which natural ventilation of the combustion chamber takes place after unsuccessful

ignition and prior to the next recycle attempt
3.125
sequences
3.125.1
start-up sequence

sequence of actions executed by the system which brings the burner from the start position to the

running position
3.125.2
first stage

part of the start-up sequence which allows the release of start fuel into the combustion chamber

3.125.3
second stage

part of the start-up sequence which allows the release of further fuel into the combustion chamber

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3.126
system for permanent operation

system that is designed to remain in the running position for longer than 24 h without interruption

3.127
system for non-permanent operation
system that is designed to remain in the running position for less than 24 h
3.128
self-checking function of the flame detector device/HTO detector

automatic internal function of the system which checks the operation of the flame detector device/HTO

detector
3.129
air flow simulation

condition which occurs when the air flow sensor indicates the presence of air flow when in reality no

air flow is present
3.130
spark supervision
process of monitoring the ignition spark
3.131
pilot or start fuel flame proving period

interval between the end of the first safety time and the beginning of the second safety time which is

used to prove that the pilot or start fuel flame is stable
3.132
intermittent first stage

first stage that is ignited prior to ignition of the main flame and is shut off simultaneously with the main

flame
3.133
interrupted first stage

first stage that is ignited each time the burner is started up and which is extinguished at the end of the

second safety time
3.134
burner ignition systems
3.134.1
ignition by supervised gas-fired pilot burner
system which releases the main fuel when the ignition burner flame is present
3.134.2
ignition by non-supervised gas-fired pilot burner

system in which the release of the main fuel is not prevented by the absence of the flame of the pilot

burner
3.135
ignition timings
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3.135.1
total ignition time
period during which the ignition device is energized

Note 1 to entry: This time includes pre-ignition, ignition and post-ignition times.

3.135.2
pre-ignition time

period between the energization of the ignition device and the start of the safety time

3.135.3
ignition time

period between the start of the safety time and the first detection of a flame signal

Note 1 to entry: The maximum ignition time ends prior to or simultaneous with the safety time when no flame

signal has been detected.
3.135.4
post-ignition time

period between the first detection of the flame signal and the de-energization of the ignition device

3.136
maximum fuel flow rate

constant mass of oil consumed during a period of time at maximum heat input as stated in the

instructions

Note 1 to entry: Maximum fuel flow rate is expressed in kilograms per hour (kg/h).

[SOURCE: EN 267:2020, 3.2.1.1]
3.137
common cause failures

failures of different items, resulting from a single event, where these failures are not consequences of

each othe
...

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