EN 298:2003

Automatic gas burner control systems for gas burners and gas burning appliances with or without fans

This European Standard specifies requirements for the construction and function, test methods and marking of automatic burner control systems and also programming units and their associated flame detector devices for gas burners and gas burning appliances with or without fans.
This standard also applies to automatic burner control systems, programming units and their associated flame detector devices that include additional functions.
Automatic burner control systems utilizing thermo-electric flame supervision devices are not covered by this standard.
This European Standard covers type testing only.
NOTE   European Standards for burners, appliances or processes which use automatic burner control systems, programming units or flame detectors can override the requirements of this standard.

Feuerungsautomaten für Gasbrenner und Gasgeräte mit oder ohne Gebläse

Diese Europäische Norm legt Anforderungen an den Bau und die Funktion, an Prüfverfahren und die Kennzeichnung von Feuerungsautomaten sowie von Steuergeräten und den zugehörigen Flammenwächtern für Gasbrenner und Gasgeräte mit oder ohne Gebläse fest.
Diese Norm gilt auch für Feuerungsautomaten, Steuergeräte und die zugehörigen Flammenwächter, die zusätzliche Funktionen enthalten.
Feuerungsautomaten, die thermoelektrische Flammenüberwachungseinrichtungen verwenden, sind nicht Gegenstand dieser Norm.
In dieser Norm wird nur die Typprüfung behandelt.
ANMERKUNG   Europäische Normen für Brenner, Geräte oder Prozesse, die Feuerungsautomaten, Steuergeräte oder Flammenwächter verwenden, können dieser Norm vorgezogen werden.

Systèmes automatiques de commande et de sécurité pour brûleurs et appareils avec ou sans ventilateur utilisant les combustibles gazeux

La présente Norme Européenne a pour objet de fixer les exigences concernant les caractéristiques de construction et de fonctionnement, la technique des essais et le marquage des systèmes de commande et de sécurité pour brûleurs automatiques et vise également les dispositifs de commande avec les dispositifs de détection de flamme qui leur sont associés, pour les brûleurs et les appareils avec ou sans ventilateur.

Naprave za samodejni nadzor plinskih gorilnikov in plinskih aparatov z ali brez ventilatorja (gorilniški avtomati)

General Information

• Status: Withdrawn
• Publication Date: 16-Sep-2003
• Withdrawal Date: 22-May-2012
• ICS: 27.060.20 - Gas fuel burners
• Technical Committee: CEN/TC 58 - Safety and control devices for burners and appliances burning gaseous or liquid fuels
• Drafting Committee: CEN/TC 58/WG 6 - Automatic gas burner control systems
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 23-May-2012
• Completion Date: 23-May-2012
• Directive: 2009/142/EC - DIRECTIVE 2009/142/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 30 November 2009 relating to appliances burning gaseous fuels
• Directive: 90/396/EEC - Appliances burning gaseous fuels
• Mandate: M/BC/CEN/89/6 - Standardization request to CEN concerning appliances burning gaseous fuels
• Ref Project: SIST EN 298:2004 - Automatic gas burner control systems for gas burners and gas burning appliances with or without fans

Relations

• Replaces: EN 298:1993 - Automatic gas burner control systems for gas burners and gas burning appliances with or without fans
• Effective Date: 22-Dec-2008
• Replaced By: EN 298:2012 - Automatic burner control systems for burners and appliances burning gaseous or liquid fuels
• Effective Date: 30-May-2012

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2004
1DGRPHãþD
SIST EN 298:1997
Naprave za samodejni nadzor plinskih gorilnikov in plinskih aparatov z ali brez
ventilatorja (gorilniški avtomati)
Automatic gas burner control systems for gas burners and gas burning appliances with
or without fans
Feuerungsautomaten für Gasbrenner und Gasgeräte mit oder ohne Gebläse
Systemes automatiques de commande et de sécurité pour bruleurs et appareils avec ou
sans ventilateur utilisant les combustibles gazeux
Ta slovenski standard je istoveten z: EN 298:2003
ICS:
27.060.20
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 298
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2003
ICS 27.060.20 Supersedes EN 298:1993
English version
Automatic gas burner control systems for gas burners and gas
burning appliances with or without fans
Systèmes automatiques de commande et de sécurité pour Feuerungsautomaten für Gasbrenner und Gasgeräte mit
brûleurs et appareils avec ou sans ventilateur utilisant les oder ohne Gebläse
combustibles gazeux
This European Standard was approved by CEN on 23 May 2003.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 298:2003 E
worldwide for CEN national Members.

Contents
Foreword. 4
Introduction. 5
1 Scope . 5
2 Normative references. 5
3 Terms and definitions. 6
4 Classification. 10
5 Conditions for testing and measuring tolerances. 11
6 Constructional requirements. 12
6.1 General. 12
6.2 Protection provided by the enclosure . 12
6.3 Electrical equipment. 12
6.4 Electrical components. 13
6.4.1 Performance of electrical components . 13
6.4.2 Test. 13
6.5 Long-term performance . 13
6.5.1 General. 13
6.5.2 Stress test and long-term performance test . 13
7 Functional requirements . 15
7.1 General. 15
7.2 Programme . 16
7.2.1 General. 16
7.2.2 Safety actions. 16
7.2.3 Flame failure. 17
7.2.4 Recycling . 17
7.2.5 Spark restoration . 17
7.2.6 Supervision of other external devices during the start-up sequence. 17
7.2.7 Start following safety shut down . 17
7.2.8 Inter-purge and inter-waiting time. 17
7.3 Times. 17
7.3.1 General. 17
7.3.2 Purge and waiting times. 18
7.3.3 Safety times. 18
7.3.4 Response time in case of flame failure . 18
7.3.5 Reaction time to achieve safety shut-down. 18
7.3.6 Reaction time to achieve lock-out. 18
7.4 Flame detector device . 18
7.5 Lock-out and reset device. 19
7.5.1 Lock-out function. 19
7.5.2 Reset device . 19
7.6 Performance tests. 19
7.6.1 At ambient temperature. 19
7.6.2 At low temperature . 20
7.6.3 At high temperature. 20
8 Protection against environmental influences. 20
8.1 Temperature range . 20
8.2 Supply voltage variations . 20
8.2.1 General. 20
8.2.2 Requirements for operation below 85 % of rated voltage . 20
8.3 Supply voltage dips, short interruptions and voltage variations immunity . 21
8.3.1 General. 21
8.3.2 Supply voltage dips, short interruptions and voltage variations test.22
8.4 Supply frequency variations.22
8.4.1 General.22
8.4.2 Supply frequency variations test .22
8.5 Surge immunity.23
8.5.1 General.23
8.5.2 Surge immunity test .23
8.6 Electrical fast transient/burst immunity .24
8.6.1 General.24
8.6.2 Electrical fast transient/burst immunity test.24
8.7 Electromagnetic conducted and radiated disturbances induced by radio-frequency fields.24
8.7.1 Immunity to conducted disturbances, induced by radio-frequency fields.24
8.7.2 Immunity to radiated disturbances, induced by radiated fields .25
8.8 Electrostatic discharge immunity .26
8.8.1 General.26
8.8.2 Electrostatic discharge immunity test.27
9 Protection against internal faults.27
9.1 Internal faults .27
9.1.1 General.27
9.1.2 Systems for non-permanent operation: first fault.27
9.1.3 Systems for non-permanent operation: second fault.28
9.1.4 System for permanent operation: first fault.28
9.1.5 System for permanent operation: second fault.28
9.1.6 Systems for permanent and non-permanent operation: faults during lock-out or safety- shut-
down.28
9.2 Circuit and construction evaluation .29
9.2.1 Test conditions .29
9.2.2 Test criteria.29
10 Additional requirements for complex electronics.30
10.1 General.30
10.2 Fault avoidance and fault tolerance.30
10.3 Documentation.30
10.4 Assessment.31
11 Marking, installation and operating instructions .31
11.1 Marking .31
11.2 Installation and operating instructions .32
11.3 Warning note.33
Annex A (normative) Electrical/electronic component fault modes .34
Annex B (informative) Functional characteristics of burner control systems, to be given by the
appliance standard .36
Annex C (normative) Requirements for DC supplied burner.37
C.1 Scope .37
C.2 Thermal stress test.37
C.3 Long term performance test [by the manufacturer].37
C.4 At ambient temperature.37
C.5 Supply voltage variations .37
C.6 Supply voltage, supply frequency, surge immunity, electrical fast transient/burst,
electromagnetic conducted disturbances .38
C.7 Electrical transient conduction immunity for Type B only.38
C.7.1 General.38
C.7.2 Electrical transient conduction immunity test.39
Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other
provisions of EU Directives .40
Bibliography .42
Foreword
This document EN 298:2003 has been prepared by Technical Committee CEN /TC 58, "Safety and control devices
for gas-burners and gas-burning appliances", 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 March 2004, and conflicting national standards shall be withdrawn at the latest by
September 2006.
This document supersedes EN 298:1993.
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 relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.
Annexes A and C are normative. Annex B is informative.
This document includes a Bibliography.
This European Standard covers type testing only.
Following a request from CEN/TC 58, CEN has agreed to defer the date of withdrawal of EN 298 :1993 for a
transition period of 3 years.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,
Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
Introduction
Whilst this European Standard is written primarily for Automatic Gas Burner Control Systems used on or in
appliances for cooking, heating, hot water production, refrigeration, lighting or washing and having, where
applicable, a normal water temperature not exceeding 105 °C, it can be usefully quoted, as a whole or in part, by
standards for other equipment.
The functional characteristics of the automatic burner control systems, programming units, and their associated
flame detector devices, in so far as they are not laid down in this standard, are given by the standards for the
appliances for which the automatic burner control systems are intended.
This standard deals with immunity aspects of Electromagnetic Compatibility (EMC) only. Since automatic burner
control systems are intended for use as an integrated or incorporated part of an appliance, further EMC tests (both
immunity and emission) can be required for the intended use.
1 Scope
This European Standard specifies requirements for the construction and function, test methods and marking of
automatic burner control systems and also programming units and their associated flame detector devices for gas
burners and gas burning appliances with or without fans.
This standard also applies to automatic burner control systems, programming units and their associated flame
detector devices that include additional functions.
Automatic burner control systems utilizing thermo-electric flame supervision devices are not covered by this
standard.
This European Standard covers type testing only.
NOTE European Standards for burners, appliances or processes which use automatic burner control systems,
programming units or flame detectors can override the requirements of this standard.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
ENV 50204, Radiated electromagnetic field from digital radio telephones — Immunity test.
EN 60068-2-6:1995, Environmental testing — Part 2: Tests; tests Fc: Vibration (sinusoidal) (IEC 60068-2-6:1995 +
Corrigendum:1995).
EN 60127-1, Miniature fuses - Part 1: definitions for miniature fuses and general requirements for miniature fuse-
links (IEC 60127-1:1988).
EN 60335-1:1994, Safety of household and similar electrical appliances — Part 1: General requirements
(IEC 60335-1:1991, modified).
EN 60529:2000, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989).
EN 60730-1:2000, Automatic electrical controls for household and similar use — Part 1: General requirements
(IEC 60730-1:1999, modified).
EN 60730-2-5:2002, Automatic electrical controls for household and similar use — Part 2-5: Particular requirements
for automatic electrical burner control systems (IEC 60730-2-5:2000, modified).
EN 60947-5-1:1997, Low-voltage switchgear and controlgear — Part 5-1: Control circuit devices and switching
elements; electromechanical control circuit devices (IEC 60947-5-1:1997).
EN 61000-4-2, Electromagnetic compatibility (EMC) — Part 4-2: Testing and measuring techniques; Electrostatic
discharge immunity test (IEC 61000-4-2:1995).
EN 61000-4-3, Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement techniques; Radiated,
radio-frequency, electromagnetic field immunity test (IEC 61000-4-3:2002).
EN 61000-4-4, Electromagnetic compatibility (EMC) — Part 4-4: Testing and measurement techniques; Electrical
fast transient/burst immunity test(IEC 61000-4-4:1995).
EN 61000-4-5, Electromagnetic compatibility (EMC) — Part 4-5: Testing and measurement techniques; Surge
immunity test (IEC 61000-4-5:1995).
EN 61000-4-6, Electromagnetic compatibility (EMC) — Part 4-6: Testing and measurement techniques; Immunity to
conducted disturbances, induced by radio-frequency fields (IEC 61000-4-6:1996).
EN 61000-4-11, Electromagnetic compatibility (EMC) — Part 4-11: Testing and measurement techniques —
Voltage dips, short interruptions and voltage variations immunity tests (IEC 61000-4-11:1994).
EN 61558-2-6, Safety of power transformers, power supply units and similar – Part 2-6: Particular requirements for
safety isolating transformers for general use (IEC 61558-2-6:1997).
EN 61558-2-17, Safety of power transformers, power supply units and similar — Part 2-17: Particular requirements
for safety isolating transformers for switch mode power supplies (IEC 61558-2-17:1997).
ISO 7637-1, Road vehicles - Electrical disturbances from conduction and coupling - Part 1: Definitions and general
considerations.
ISO 7637-2, Road vehicles - Electrical disturbance by conduction and coupling - Part 2: Commercial vehicles with
nominal 24 V supply voltage - Electrical transient conduction along supply lines only.
IEC 60384-14, Fixed capacitors for use in electronic equipment — Part 14: Sectional specification: Fixed capacitors
for electromagnetic interference suppression and connection to the supply mains.
IEC 60384-16, Fixed capacitors for use in electronic equipment — Part 16: Sectional specification: Fixed metallized
polypropylene film dielectric d.c. capacitors.
3 Terms and definitions
For the purposes of this European Standard the following terms and definitions apply.
3.1
flame detector device
device by which the presence of a flame is detected and signalled;
it 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
3.2
flame sensor
actual flame-sensing element, the output signal or value of which is used as the input for the flame detector amplifier
3.3
sensed flame and flame signal
3.3.1
sensed flame
physical value monitored by the flame sensor
3.3.2
flame signal
signal given by the flame detector device in case of sensed flame
3.4
flame simulation
condition which occurs when the flame signal indicates the presence of a flame when in reality no flame is present
3.5
programming unit
unit which reacts to signals from control and safety devices, gives control commands, controls the start-up sequence,
supervises the burner operation and causes controlled shut-down, and if necessary safety shut-down and lock-out;
the programming unit follows a predetermined sequence of actions and always operates in conjunction with a flame
detector device
3.6
automatic burner control system
system comprising at least a programming unit and all the elements of a flame detector device;
the various functions of an automatic burner control system can be in one or more housings
3.7
start position
stage, where the system is not in lock-out position, has not yet received the start signal but can proceed with the start-
up sequence when required;
at this stage, the output terminals for any automatic shut-off valve and ignition device are not energized
3.8
start signal
signal e. g. from a thermostat, which releases the system from its start position and commences the predetermined
programme
3.9
programme
sequence of control operations determined by the programming unit involving switching on, starting up, supervising
and switching off the burner;
safety actions such as safety shut down and lock out are also part of the programme
3.10
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
3.10.1
pre-purge
purge which takes place between the start signal and the energization of the ignition device
3.10.2
post-purge
purge which takes place immediately following shut-down
3.11
first safety time
interval between the pilot gas valve, the start gas valve or main gas valve, as applicable, being energized and the pilot
gas valve, start gas valve or main gas valve, as applicable, being de-energized if the flame detector signals the
absence of a flame
NOTE Where there is no second safety time, this is called the safety time.
3.12
second safety time
where there is a first safety time applicable to either a pilot or start gas flame only, the interval between the main gas
valve being energized and the main gas valve being de-energized if the flame detector signals the absence of a flame
3.13
burner without fan
burner where the primary air required for combustion is provided by the action of the gas and the secondary air is
freely available from the surroundings
3.14
burner with fan
burner in which some or all of the air required for the combustion is supplied by means of a fan (i. e. forced draught or
induced draught)
3.15
running position of the system
position of the system in which the burner is in normal operation under the supervision of the programming unit and its
flame detector device
3.16
controlled shut-down
process by which the power to the gas shut-off valve(s) is removed before any other action takes place, e. g. as a
result of the action of a controlling function
3.17
safety shut-down
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;
the resulting state of the system is defined by deactivated terminals for the gas shut-off valves and the ignition device
3.18
lock-out
3.18.1
non-volatile lock-out
safety shut-down condition of the system, such that a restart can only be accomplished by a manual reset of the
system and by no other means
3.18.2
volatile lock-out
safety shut-down condition of the system, such that 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
3.19
spark restoration
process by which, following loss of flame signal, the ignition device will be switched on again without total interruption
of the gas supply
3.20
recycling
process by which, after a safety shut-down a full start-up sequence is automatically repeated
3.21
functions of automatic burner control systems
3.21.1
waiting time
for burners without fans, the interval between the start signal being given and the energization of the ignition device or
gas valves, which ever comes first;
during this time natural ventilation of the combustion chamber and the flue passages can take place
3.21.2
pre-purge time
period during which purge takes place at the proven air rate prior to the energization of the ignition device or gas
valves, which ever comes first
3.21.3
post-purge time
period during which purge takes place at the proven air rate between any shut-down and the moment the fan is
switched off
3.21.4
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
3.21.5
inter-waiting time
period during which natural ventilation of the combustion chamber takes place after unsuccessful ignition and prior
to the next recycle attempt
3.22
sequences
3.22.1
start-up sequence
sequence of actions executed by the system which brings the burner from the start position to the running position
3.22.2
first stage
part of the start-up sequence which allows the release of start gas into the combustion chamber
3.22.3
second stage
part of the start-up sequence which allows the release of further gas into the combustion chamber (if applicable)
3.23
systems for permanent operation
systems that are designed to remain in the running position for longer than 24 h without interruption
3.24
systems for non-permanent operation
systems that are designed to remain in the running position for less than 24 h
3.25
self-checking function of the flame detector device
automatic internal function of the system which checks the operation of the flame detector device
3.26
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
3.27
spark supervision
process of monitoring the ignition spark
3.28
pilot or start gas 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 gas flame is stable
3.29
intermittent first stage
first stage that is ignited prior to ignition of the main flame and is shut off simultaneously with it
3.30
interrupted first stage
first stage that is ignited each time the burner is started up and which is extinguished at the end of the main flame
establishment period
4 Classification
To assist with the specification of systems with regard to particular applications, the following codes shall be used.
Table 1 — Classification codes
1st character denotes as
Fanned F
Atmospheric A
Both B
2nd character denotes type of first stage:
interrupted start gas I
intermittent start gas T
Both B
direct main burner ignition M
3rd character denotes first action following flame failure:
non-volatile lock-out L
volatile lock-out V
Recycling C
spark restoration R
4th character denotes type of final action:
non-volatile lock-out L
volatile lock-out V
spark restoration R
5th character denotes:
fixed times X
adjustable times J
Both B
6th character denotes:
self-check as required in 7.4.5 K
non-self-check N
Both B
NOTE Other required specification data are given in clause 11.
The letter O shall be used for any character that is not relevant.
If the functional behaviour of the system deviates from this standard (see 7.1) it shall be classified with the letter "S"
exclusively. Other characters are not used in combination with S.
5 Conditions for testing and measuring tolerances
All the tests shall be carried out under this conditions unless otherwise specified. The test conditions are:
 rated voltage or rated voltage range;
 rated frequency;
 ambient temperature of (20 ± 5) °C.
The error of measurement shall not exceed:
 for time measurements: ± 0,1 s;
 for temperature measurements: ± 1 K;
 for supply frequency measurements: ± 0,1 Hz;
 for electrical supply measurements: ± 0,5 %.
All measurements shall be made after stable temperature conditions have been achieved. All tests are performed
in the order written in this standard except for that of 6.5.2 and clause 9.
The tests shall be carried out in the mounting positions specified by the manufacturer.
When several mounting positions are specified, the tests shall be carried out with the system installed in the least
favourable position.
6 Constructional requirements
6.1 General
The quality of the materials, the design and the structure of the components used shall be such that the system will
operate safely and in accordance with the requirements of this standard for a reasonable period of time (service
life) under the normally expected mechanical, chemical, thermal and environmental conditions, even in the event of
such carelessness as may occur in normal use, provided that the manufacturer's instructions for installation,
adjustment, operation and maintenance are complied with. Compliance is checked by carrying out the tests
specified in this standard.
The system shall be designed such that changes in critical circuit component values (such as those affecting timing
or sequence) within the component manufacturer's declared worst case tolerances, including the long term stability,
shall result in the system continuing to function in accordance with this standard. Compliance shall be checked by
worst case analysis.
The construction of any additional functions included in the automatic burner control system, programming unit or
flame detector for which no provisions exist in this standard, shall be such that they do not degrade the safe and
correct operation of the automatic burner control system, programming unit or flame detector.
The system shall include at least two operating elements to directly de-energize the safety relevant gas valve
terminals.
NOTE A single relay switching two independent contacts is considered to be only one operating element.
6.2 Protection provided by the enclosure
The class of protection for systems with their own enclosure shall be a minimum of EN 60529:2000 IP 40 or
protection shall be provided by the appliance in which it is installed. For systems for use in the open air the
protection shall conform to at least EN 60529:2000 IP 54.
6.3 Electrical equipment
The electrical equipment shall comply with the relevant requirements of EN 60730-2-5:2002, Clauses 8, 9, 10, 11,
12, 13, 14, 18, 19, 20, 21, 22, and 24, except 11.3.4, 11.3.106, to 11.3.108, 11.4.101 to 11.4.106 and 11.101 and
12.1.1 which are covered in this Standard.
If the supply voltage polarity can affect the safety either provisions to avoid an uncontrolled opening of a gas valve
shall be provided or clear warnings shall be given in the installation and operating instruction (see 11.2 d)).
6.4 Electrical components
6.4.1 Performance of electrical components
The electrical components shall be designed for their intended use.
6.4.2 Test
An examination of the circuit shall be carried out according to the requirements of clause 9 and annex A.
6.5 Long-term performance
6.5.1 General
All components of the system, and its associated flame detector device shall be able to withstand 250 000 burner
start-up operations and still comply with this standard. This requirement shall be checked by carrying out the tests
detailed in 6.5.2.
6.5.2 Stress test and long-term performance test
6.5.2.1 General
The test of 6.5.2.2 and the test of 6.5.2.3 shall not be carried out on the same test sample. The tests as described
in 7.6 shall be carried out before and after the long-term performance tests of 6.5.2.2 and 6.5.2.3. Additionally, on
completion of the tests described in 6.5.2.3, the tests described in EN 60730-1:2000, 13.2.2 through 13.2.4 shall be
carried out.
6.5.2.2 Stress test [by the test laboratory]
6.5.2.2.1 Thermal stress test
The thermal stress test shall be carried out with the terminals loaded with the loads and power factors as declared
by the manufacturer.
The system and its flame detector device shall be tested under the following conditions.
a) The purpose of the test is to cycle components of an electronic circuit between the extremes temperature likely
to occur during normal use and which may result from ambient temperature variation, mounting surface
temperature variation, supply voltage variation, or the change from an operating condition to a non-operation
condition or vice versa.
The following conditions shall form the basis of the test:
Duration of test: 14 days at thermal conditions.
Electrical conditions
The system is loaded according to the ratings declared by the manufacturer, the voltage then being increased
to 110 % of maximum declared rated voltage except that for 30 min during each 24 h period of the test the
voltage is reduced to 90 % of minimum declared rated voltage. The change of voltage shall not be
synchronized with the change of temperature. Each 24 h period shall also include at least one period in the
order of 30 s during which the supply voltage is switched off.
Thermal conditions
The ambient temperature and/or the mounting surface temperature are varied between the maximum declared
ambient temperature or 60 °C whichever is higher, and the minimum declared ambient temperature or 0 °C,
whichever is lower, to cause the temperature of the components of the electronic circuit to be cycled between
the resulting extremes. The rate of ambient and/or mounting surface temperature change shall be in the order
of 1 °C/min and the extremes of temperature maintained for approximately 1 h.
NOTE Care should be taken to avoid the occurrence of condensation during this test.
Rate of operation
During the test the system shall be cycled through its operational modes at the fastest possible rate up to a
maximum of six cycles/min subject to the need to cycle components between their temperature extremes.
The number of cycles of operation completed during this test shall be recorded and if this number is less than
45 000 the remaining cycles shall be executed at the declared rated voltage and at ambient temperature.
b) 2 500 operations at the maximum declared ambient temperature or 60 °C whichever is higher, and at 110 % of
the maximum declared rated voltage.
c) 2 500 operations at the minimum declared ambient temperature or 0 °C whichever is lower, and at 85 % of the
minimum declared rated voltage.
d) The system shall also be tested under the following conditions:
1) 2 500 cycles without flame presence
2) 2 500 cycles, with the flame signal disappearing during operation.
During the tests a), b), c) and d) described above, the system shall be operated in such a way that the normal start-
up sequence is performed. The time that the system is held in the running position and the time that the control
loop is interrupted before the cycle is repeated shall be agreed between the manufacturer and the test authority.
NOTE By agreement between the manufacturer and the test authority the safety and purge times used during the above
tests can be chosen to be as short as practicable so that the endurance test is not unnecessarily prolonged.
If times have been shortened (see note above), on completion of the endurance test, the purge times shall not
have decreased nor the safety times have increased from those times measured before the commencement of the
test.
6.5.2.2.2 Vibration test
When resistance to vibration is declared by the manufacturer (see 11.2 q), the following sinusoidal vibration test is
to be carried out.
The object of the test is to demonstrate the ability of the system to withstand the long-term effects of vibration at
levels declared by the manufacturer.
During the exposures the system shall be mounted on a rigid fixture by means of the specified fastening
arrangement.
The test shall be performed in accordance with EN 60068-2-6:1995, test Fc.
The test is performed with the following minimum severity conditions:
Acceleration amplitude: 1,0 g or higher if declared by the manufacturer
Frequency range: 10 Hz to 150 Hz
Sweep rate: 1 octave per minute
Number of sweep cycles: 10
Number of axes: 3, mutually perpendicular.
The systems shall be in the start position during the exposure. A performance test as described in 7.6.1 shall be
carried out towards the end of each exposure. A visual inspection shall be carried out after the termination of the
exposure. No mechanical damage shall be found.
6.5.2.3 Long term performance test [by the manufacturer]
The manufacturer shall declare that the system has completed a minimum of 250 000 burner start-up operations
with the terminals loaded with the loads and power factors as declared, without failure.
The system and its flame detector shall have been tested under the following conditions.
a) The number of operations at the declared rated voltage and at ambient temperature shall be 225 000.
b) The number of operations at the maximum declared ambient temperature or 60 °C, whichever is higher, and at
110 % of the maximum declared rated voltage shall be 12 500 operations.
c) The number of operations at the minimum declared ambient temperature or 0 °C, whichever is lower, and at
85 % of the minimum declared rated voltage shall be 12 500 operations.
NOTE The safety and purge times used during the above tests can be chosen to be as short as practicable so that the
endurance test is not unnecessarily prolonged.
During the tests described above, the system shall be operated in such a way that a complete start-up sequence is
performed.
If times have been shortened (see note above), on completion of the endurance test the purge times shall not have
decreased nor the safety times have increased from those times measured before the commencement of the test.
7 Functional requirements
7.1 General
Any additional functions included in the automatic burner control system, programming unit or flame detector for
which no provisions exist in this standard, shall be such that they do not degrade the safe and correct operation of
the automatic burner control system, programming unit or flame detector.
If the functional behaviour deviates from this standard the manufacturer has to declare this by giving detailed
information and reasons for the deviation (see clauses 4 and 11 ).
Adjustment of parameters e.g. programme timings and programme sequences is permitted but shall only be
possible by means providing protection against access by uninstructed persons or shall be declared as requiring
such protection in the applicatio
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