Automatic burner control systems for oil burners

This document specifies the requirements, operating conditions and test methods for burner control systems for automatic and semi-automatic oil burners with or without fans.
It also applies to dual fuel burners, for use with either oil or gaseous fuels, when operating on oil.
This document covers type testing only.
This document also applies to automatic burner control systems, programming units or flame detector devices that include additional functions.
Automatic burner control systems utilising thermo-electric flame supervision devices are not covered by this document.

Feuerungsautomaten für Ölbrenner

In diesem Dokument werden Anforderungen, Betriebsbedingungen und Prüfverfahren für Feuerungen für automatische und halbautomatische Ölbrenner mit oder ohne Gebläse festgelegt.
Sie gilt auch für Öl Zweistoffbrenner, die entweder Öl oder gasförmige Brennstoffe anwenden können für den Fall, dass die Brenner mit Öl betrieben werden.
In diesem Dokument wird nur die Typprüfung behandelt.
Dieses Dokument gilt ferner für Feuerungsautomaten, Steuergeräte oder ihre zugehörigen Flammenwächter, die zusätzliche Funktionen enthalten.
Feuerungsautomaten, die eine thermoelektrische Flammenüberwachung anwenden, sind nicht Gegenstand dieses Dokuments.

Systèmes automatiques de commande et de sécurité pour brûleurs à fioul

Le présent document fixe les exigences, les conditions de fonctionnement et les méthodes d'essai des systèmes de commande et de sécurité pour brûleurs automatiques et semi-automatiques à fioul avec ou sans ventilateur.
Il s'applique également aux brûleurs mixtes, utilisant alternativement le fioul ou les combustibles gazeux, lorsqu'ils fonctionnent au fioul.
Le présent document traite uniquement des essais de type.
Le présent document s'applique également aux systèmes automatiques de commande et de sécurité des brûleurs, aux unités de programmation ou aux dispositifs de détection de flamme comportant des fonctions supplémentaires.
Le présent document ne concerne pas les systèmes automatiques de commande et de sécurité des brûleurs utilisant des dispositifs de détection de flamme thermoélectriques.

Sistemi za avtomatski nadzor za oljne gorilnike

General Information

Status
Withdrawn
Publication Date
14-Jun-2005
Withdrawal Date
22-May-2012
Current Stage
9960 - Withdrawal effective - Withdrawal
Start Date
23-May-2012
Completion Date
23-May-2012

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SLOVENSKI STANDARD
SIST EN 230:2006
01-januar-2006
1DGRPHãþD
SIST EN 230:2000
SIST EN 230:2000/AC:2000
Sistemi za avtomatski nadzor za oljne gorilnike
Automatic burner control systems for oil burners
Feuerungsautomaten für Ölbrenner
Systemes automatiques de commande et de sécurité pour bruleurs a fioul
Ta slovenski standard je istoveten z: EN 230:2005
ICS:
27.060.10 *RULOQLNLQDWHNRþHLQWUGR Liquid and solid fuel burners
JRULYR
SIST EN 230:2006 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN 230:2006
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SIST EN 230:2006
EUROPEAN STANDARD EN 230
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2005
ICS 27.060.10 Supersedes EN 230:1990
English version
Automatic burner control systems for oil burners

Systèmes automatiques de commande et de sècurité pour Feuerungsautomaten für Ölbrenner

brûleurs à fioul
This European Standard was approved by CEN on 14 February 2005.

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 Central Secretariat 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 Central Secretariat has the same

status as the official versions.

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

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

Portugal, Slovakia, Slovenia, 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

© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 230:2005: E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 230:2006
EN 230:2005 (E)
Contents Page

Foreword ..........................................................................................................................................................3

Introduction......................................................................................................................................................4

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

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

3 Terms and definitions.........................................................................................................................6

4 Classification.....................................................................................................................................11

5 Normal conditions for testing and measurement tolerances ........................................................13

6 Constructional requirements ...........................................................................................................13

7 Functional requirements ..................................................................................................................17

8 Protection against environmental influences.................................................................................26

9 Protection against internal faults.....................................................................................................34

10 Additional requirements for complex electronics ..........................................................................37

11 Marking, installation and operating instructions (see also Annex C)...........................................39

Annex A (normative) Electrical/electronic component fault modes tables ..............................................42

Annex B (informative) Functional characteristics of burner control systems, to be given by the

appliance standard ............................................................................................................................45

Annex C (normative) Requirements for DC supplied burner controls......................................................46

Annex D (informative) Functional diagrams of oil burner controls............................................................49

Bibliography...................................................................................................................................................55

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SIST EN 230:2006
EN 230:2005 (E)
Foreword

This document (EN 230:2005) has been prepared by Technical Committee CEN/TC 47 “Atomizing oil burners

and their components-Function-safety-testing”, the secretariat of which is held by DIN.

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 December 2005, and conflicting national standards shall be withdrawn

at the latest by June 2008.

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

rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 230:1990.
According to edition 1990 the following fundamental changes are carried out:
 protection against environmental influences;
 additional requirements for complex electronics.

 the structure and wherever possible the definitions and requirements are taken over from EN 298:2003-

09.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

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

and the United Kingdom.
---------------------- Page: 5 ----------------------
SIST EN 230:2006
EN 230:2005 (E)
Introduction

Whilst this document is written primarily for Automatic Oil Burner Control Systems used on or in appliance for

cooking, heating, hot water production, refrigeration, lighting or washing and having, where applicable, a normal

water temperature not exceeding 105 °C, it may 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 document, are given by the standards for the

appliances for which the automatic burner control systems are intended.

This document 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) may be required for the intended use.
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SIST EN 230:2006
EN 230:2005 (E)
1 Scope

This document specifies the requirements, operating conditions and test methods for burner control systems for

automatic and semi-automatic oil burners with or without fans.

It also applies to dual fuel burners, for use with either oil or gaseous fuels, when operating on oil.

This document covers type testing only.

This document also applies to automatic burner control systems, programming units or flame detector devices

that include additional functions.

Automatic burner control systems utilising thermo-electric flame supervision devices are not covered by this

document.
2 Normative references

The following referenced documents are indispensable for the application 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 267:1999, Forced draught oil burners – Definitions, requirements, testing, marking

EN 60068-2-6:1995, Environmental testing – Part 2: Tests – Test Fc: Vibration (sinusoidal) (IEC 60068-2

6:1995 + Corrigendum 1995)

EN 60127-1:1991, Miniature fuses – Part 1: Definitions for miniature fuses and general requirements for

miniature fuse-links (IEC 60127-1:1988)

EN 60335-1:2002, Household and similar electrical appliances – Safety – Part 1: General requirements (IEC

60335-1:2001, modified)

EN 60529, 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 61000-4-2, Electromagnetic compatibility (EMC) – Part 4: Testing and measuring techniques –

Section 2: Electrostatic discharge immunity test – Basic EMC publication (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: Testing and measurement techniques –

Section 4: Electrical fast transient/burst immunity test (IEC 61000-4-4:1995)

EN 61000-4-5, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement techniques –

Section 5: Surge immunity test (IEC 61000-4-5:1995)

EN 61000-4-6, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement techniques –

Section 6: Immunity to conducted disturbances, induced by radio-frequency fields (IEC 61000-4-6:1996)

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SIST EN 230:2006
EN 230:2005 (E)

EN 61000-4-11, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement techniques –

Section 11: Voltage dips, short interruptions and voltage variations immunity tests (IEC 61000-4-11:2004).

EN 61558-2-6:1997, 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 61558-2-17:1997, Safety of power transformers, power supply units and similar — Part 2-17: Particular

requirements for transformers for switch mode power supplies (IEC 61558-2-17:1997)

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

ISO 7637-1:2002, Road vehicles – Electrical disturbances from conduction and coupling – Part 1: Definitions

and general considerations

ISO 7637-2:1990, Road vehicles – Electrical disturbance by conduction and coupling – Part 2: Electrical

transient conduction along supply lines only
3 Terms and definitions
For the purposes of this document, 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
[EN 298:2003, term 3.1]
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
[EN 298:2003, term 3.2]
3.3
sensed flame and flame signal
3.3.1
sensed flame
physical value monitored by the flame sensor
[EN 298:2003, term 3.3.1]
3.3.2
flame signal
signal given by the flame detector device in case of sensed flame
[EN 298:2003, term 3.3.2]
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SIST EN 230:2006
EN 230:2005 (E)
3.4
flame simulation

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

present
[EN 298:2003, term 3.4]
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
[EN 298:2003, term 3.5]
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 may be in one or more housings

[EN 298:2003, term 3.6]
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 energised

[EN 298:2003, term 3.7]
3.8
start signal

signal e.g. from a regulating device, which releases the system from its start position and commences the

predetermined programme
[EN 298:2003, term 3.8]
3.9
burner ignition systems
3.9.1
automatic electrical ignition
system in which the fuel is ignited using only electrical energy
3.9.1.1
ignition by controlled spark

system which allows the fuel to be released only when the presence of the ignition spark has been proven

3.9.1.2
ignition by non controlled spark
system in which the ignition spark is not proven
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SIST EN 230:2006
EN 230:2005 (E)
3.9.2
automatic ignition with liquid or gaseous fuel

system by which the fuel is ignited by a pilot burner using liquid or gaseous fuel; the operation of the pilot

burner may be either interrupted or intermittent.
Interrupted pilot burners may be operated manually.
Intermittent pilot or first stage burners are operated automatically
3.9.2.1
ignition by controlled pilot burner
system which release the main fuel when the ignition burner flame is present
3.9.2.2
ignition by non-controlled pilot burner

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

3.10
start-up sequence

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

position
[EN 298:2003, term 3.22.1]
3.11
programme

sequence of control operations determined by the programming unit involving switching on, starting up,

supervising and switching off the burner (see diagrams in Annex D)
3.12
waiting time

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

ignition device. During this time natural ventilation of the combustion chamber and the flue passages may take

place
3.13
purge time

period during which the combustion chamber is compulsorily ventilated without any fuel being supplied

3.13.1
pre-purge time

period preceding the signal to open the fuel valve during which the combustion chamber is compulsorily

ventilated
3.13.2
post-purge time

period following the signal to close the fuel valve during which the combustion chamber is compulsorily

ventilated
3.14
ignition
3.14.1
total ignition time

period during which the ignition device is in operation. Pre-ignition, actual ignition and post-ignition times make

up the total ignition time
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SIST EN 230:2006
EN 230:2005 (E)
3.14.2
pre-ignition time
period between the start of the ignition cycle and the signal to open the valve
3.14.3
ignition time

period between the signal to open the valve and the first indication of the flame signal

3.14.4
post-ignition time

period between the first indication of the flame signal and the shut-off signal to the ignition device

3.15
safety time

duration of the maximum permissible time during which the burner control unit gives the signal to open the fuel

valve without there being a flame signal
3.15.1.
first safety time

time starting from the signal for release of the fuel and terminating at the moment at which the signal for

interrupting the fuel supply is given
NOTE Where there is no second safety time, this is called the safety time.
3.15.2
second safety time

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

interval between the main valve being energised and the main valve being de-energised if the flame detector

signals the absence of a flame
3.15.3
safety time during operation

time starting at the moment the sensed flame is extinguished and ending at the moment the signal for

interrupting the fuel supply is given
3.16
pilot or start 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 flame is stable
[EN 298:2003, term 3.28]
3.17
intermittent first stage

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

[EN 298:2003, term 3.29]
3.18
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
3.19
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
[EN 298:2003, term 3.15]
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SIST EN 230:2006
EN 230:2005 (E)
3.20
controlled shut-down

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

result of the action of a controlling function
3.21
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 which prevents the burner from going into operation or puts the

burner out of operation. The resulting state of the system is defined by deactivated terminals for the shut-off

valves and the ignition
3.22
lock-out
3.22.1
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
[EN 298:2003, term 3.18.1]
3.22.2
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

[EN 298:2003, term 3.18.2]
3.23
ignition-restoration

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

interruption of the fuel supply
3.24
recycling

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

[EN 298:2003, term 3.20]
3.25
operation systems
3.25.1
systems for non-permanent operation
systems that are designed to remain in the running position for less than 24 h
[EN 298:2003, term 3.24]
3.25.2
systems for permanent operation

systems that are designed to remain in the running position for longer than 24 h without interruption

[EN 298:2003, term 3.23]
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SIST EN 230:2006
EN 230:2005 (E)
3.26
self-checking function of the system and the flame detector

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

3.27
burner without fan

burner where the primary air required for combustion is provided by the action of the fuel and the secondary

air is freely available from the surroundings
3.28
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)
[EN 298:2003, term 3.14]
3.29
maximum throughput

mass of fuel consumed during one hour at the highest throughput stated by the manufacturer

Unit: kg/h
[EN 267:1999, term 3.2.1.1]
4 Classification

To assist with the specification of systems with regard to particular applications, the codes according to Table 1

shall be used.
The letter O shall be used for any character that is not relevant.
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SIST EN 230:2006
EN 230:2005 (E)
Table 1 — Classification codes
character specification code
1st character denotes as:
forced draught F
natural draught A
both B
2nd character denotes method of ignition:
interrupted pilot I
intermittent pilot or first stage T
direct main burner ignition at full M
rate
3rd character denoted first action following flame
failure:
non-volatile lock-out
volatile lock-out
recycling
ignition restoration
4th character denotes type of final action:
non-volatile lock-out L
volatile lock out V
ignition restoration R
5th character denotes:
fixed times X
adjustable times J
both B
6th character denotes:
self-check as required in 7.5.6 K
non-self-check N
both B
7th character "S" denotes:
a device with a special system
deviating from the specification of
this document
"WLE" denotes:
a device suitable for an
application combined with air-
heaters (see 7.1; 7.8).
NOTE Other required specification data are given in Clause 11.
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SIST EN 230:2006
EN 230:2005 (E)
5 Normal conditions for testing and measurement tolerances

All the tests shall be carried out under normal conditions unless otherwise specified. The normal 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.

The tests shall be carried out in the mounting position 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

automatic burner control systems and flame detector devices will operate safely and in accordance with the

requirements of this document – 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 document.

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 document. 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 document, 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-energise the safety relevant oil valve

terminals.

NOTE A single relay switching two independent contacts is considered to be only one operating element.

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SIST EN 230:2006
EN 230:2005 (E)
6.2 Protection provided by the enclosure

The class of protection for systems with their own enclosure shall be a minimum of IP 40 according to

EN 60529. For systems for use in the open air the protection shall be a minimum of IP 54 according to

EN 60529.

For systems without enclosure, protection shall be provided by the burner in which it is installed.

6.3 Electrical equipment

The electrical equipment shall comply with the requirements of EN 60730-2-5:2002 Clauses 8, 9, 10, 11, 12,

13, 14, 18, 19, 20, 21, 22, 23 and 24.

If the supply voltage polarity can affect the safety either provisions to avoid an uncontrolled opening of an oil

valve shall be provided or clear warnings shall be given to the user of the control system of the burner.

6.4 Long-term performance
6.4.1 General

All components of the system, and its associated flame detector device shall be able to withstand

250 000 burner start-up operations (255 000 where resistance to vibration is declared) and still comply with

this document. This requirement shall be attested by the manufacturer by following the requirements detailed

in 6.4.2.2.
6.4.2 Long-term performance test
6.4.2.1 General

The test of 6.4.2.2 and the test of 6.4.2.3 shall not be carried out on the same test sample. The tests as

described in 7.9 shall be carried out before and after the long-term performance tests of 6.4.2.2 and 6.4.2.3.

Additionally, on completion of the tests described in 6.4.2.3, the tests described in EN 60730-1:2000, 13.2.2

through 13.2.4 shall be carried out.
6.4.2.2 Tests to be carried out

The test of burner start-up operations 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 of

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-operating condition or vice versa.
The following conditions shall form the basis of the test:
1) Duration of the test:
the duration of test shall be 14 days.
2) 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

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SIST EN 230:2006
EN 230:2005 (E)

period of the test the voltage is reduced to 90 % of minimum declared rated voltage. The change of

voltage shall not be synchronised 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.

3) 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 1 Care should be taken to avoid the occurrence of condensation during this test.

4) 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 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.

e) when resistance to vibration is declared by the manufacturer, the following sinusoidal vibration test is to

be carried out.

NOTE 2 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
...

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