prEN IEC 60730-2-5:2025
(Main)Automatic electrical controls - Part 2-5: Particular requirements for automatic electrical burner control systems
Automatic electrical controls - Part 2-5: Particular requirements for automatic electrical burner control systems
Automatische elektrische Regel- und Steuergeräte für den Hausgebrauch und ähnliche Anwendungen - Teil 2-5: Besondere Anforderungen an automatische elektrische Brenner-Steuerungs- und Überwachungssysteme
Dispositifs de commande électrique automatiques - Partie 2-5: Exigences particulières pour les systèmes de commande électrique automatiques des brûleurs
Avtomatske električne krmilne naprave - 2-5. del: Posebne zahteve za avtomatske električne krmilne sisteme gorilnikov
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2025
Avtomatske električne krmilne naprave - 2-5. del: Posebne zahteve za avtomatske
električne krmilne sisteme gorilnikov
Automatic electrical controls - Part 2-5: Particular requirements for automatic electrical
burner control systems
Automatische elektrische Regel- und Steuergeräte für den Hausgebrauch und ähnliche
Anwendungen - Teil 2-5: Besondere Anforderungen an automatische elektrische
Brenner-Steuerungs- und Überwachungssysteme
Dispositifs de commande électrique automatiques - Partie 2-5: Exigences particulières
pour les systèmes de commande électrique automatiques des brûleurs
Ta slovenski standard je istoveten z: prEN IEC 60730-2-5:2025
ICS:
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
72/1460/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60730-2-5 ED5
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-01-03 2025-03-28
SUPERSEDES DOCUMENTS:
72/1444/CD, 72/1459/CC
IEC TC 72 : AUTOMATIC ELECTRICAL CONTROLS
SECRETARIAT: SECRETARY:
United States of America Ms Grace Roh
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which
they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries”
clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Automatic electrical controls - Part 2-5: Particular requirements for automatic electrical burner
control systems
PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.
IEC 60730-2-5 ED5 © IEC 2024 2 72/1460/CDV
1 CONTENTS
2 1 Scope . 7
3 2 Normative references . 8
4 3 Terms and definitions . 9
5 3.2 Definitions of types of control according to purpose . 9
6 3.3 Definitions relating to the function of controls . 10
7 3.5 Definitions of types of control according to construction . 14
8 3.101 Definitions relating to the type of burner . 15
9 4 General . 16
10 4.3 General notes on tests . 16
11 5 Required technical information . 16
12 5.2 Methods of providing technical information . 16
13 6 Protection against electric shock . 19
14 6.1 General requirements . 19
15 6.3 Capacitors . 19
16 7 Provision for protective earthing . 19
17 8 Terminals and terminations. 19
18 8.2 Terminals and terminations for internal conductors . 20
19 9 Constructional requirements . 20
20 9.3 Actuation and operation . 20
21 9.4 Actions . 23
22 9.10 Equipment inlets and socket-outlets . 25
23 9.11 Requirements during mounting, use, maintenance and servicing . 25
24 9.13 Protective controls and components of protective control systems . 25
25 9.101 Flame detector constructional requirements . 25
26 9.102 Reset from lock-out function . 26
27 9.103 Application requirements for the use of Type 2.AL burner control systems in warm
28 air heating appliances (furnaces) . 27
29 10 Threaded parts and connections . 28
30 11 Creepage distances, clearances and distances through solid insulation . 28
31 11.1 General . 28
32 12 Components . 28
33 13 Fault assessment on electronic circuits . 28
34 13.1 Fault assessment for inherent safety . 28
35 14 Moisture and dust resistance . 29
36 15 Electric strength and insulation resistance . 29
37 15.1 Insulation resistance . 29
38 15.2 Electric strength . 29
39 16 Heating . 30
40 16.3 Not applicable . 30
41 16.4 Modficiation: . 30
42 16.6 Modification: . 30
43 16.7 Modfification: . 30
44 17 Manufacturing deviation and drift . 30
45 18 Environmental stress . 30
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46 18.2 Environmental stress of temperature . 30
47 19 Endurance . 31
48 19.1 General requirements . 31
49 19.3 Thermal conditions for the tests . 31
50 19.4 Manual and mechanical conditions for the tests . 31
51 19.5 Dielectric strength requirements. 31
52 19.6 Ageing test . 31
53 19.7 Overvoltage test or overload test in all countries using an overload test of
54 automatic action at accelerated rate . 32
55 19.8 Test of automatic action at accelerated rate . 32
56 19.9 Test of automatic action at slow rate . 32
57 19.10 Overvoltage test or overload test in all countries that use the overload test of
58 manual action at accelerated speed . 32
59 19.11 Test of manual action at slow speed . 32
60 19.12 Test of manual action at high speed which has multiple poles, and where polarity
61 reversal occurs during the action . 32
62 19.13 Test of manual action at accelerated speed . 32
63 19.14 Evaluation of compliance . 32
64 19.15 Test for particular purpose controls . 32
65 20 Mechanical strength . 34
66 20.2 Impact resistance . 34
67 20.3 Free-standing controls . 34
68 20.4 In-line cord controls . 34
69 20.5 Pull-cord actuated controls . 34
70 20.6 Foot actuated controls . 34
71 20.8 Flexing - test . 34
72 21 Resistance to heat, fire and tracking . 34
73 22 Resistance to corrosion . 35
74 23 Electromagnetic compatibility (EMC) requirements – Emission . 35
75 24 Normal operation . 35
76 25 Electromagnetic compatibility (EMC) requirements – Immunity . 35
77 26 Abnormal operation tests . 35
78 Annex H (normative) Requirements related to functional safety . 36
79 H.3 Terms and definitions. 36
80 H.5 Information . 36
81 H.13 Fault assessment on electronic circuits . 36
82 H.17 Manufacturing deviation and drift . 38
83 H.19 Endurance . 39
84 H.25 Electromagnetic compatibility (EMC) requirements – Immunity. 39
85 Annex J (normative) Requirements for thermistor elements and controls using thermistors . 46
86 Annex Q (informative) Regional differences relevant for the member countries of Cenelec . 47
87 Annex R (informative) National differences relevant in the United States of America . 48
88 R.2 Normative references . 48
89 Annex S (informative) National differences relevant in Japan . 49
90 S.2 Normative references . 49
91 Annex T (informative) National differences relevant in Canada . 50
92 T.2 Normative references . 50
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93 Annex AA (informative) Functional characteristics of burner control systems to be specified
94 by the relevant appliance standards, as applicable . 51
95 Bibliography . 52
97 Figure 101 – Pulse spark generation . 19
98 Figure 102 – Typical installation of the independent combustion air supply for room
99 independent operation . 27
100 Figure H.101 – Voltage variation test . 41
102 Table 1 – Required technical information and methods of providing these information . 16
103 Table H.1 – Additional items to Table 1 . 36
104 Table H.101 – Timing of short-term supply voltage variations . 41
105 Table H.102 – Test levels for electrostatic discharge . 43
106 Table AA.1 – Functional characteristics of burner control systems to be specified by the
107 relevant appliance standards, as applicable . 51
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109 INTERNATIONAL ELECTROTECHNICAL COMMISSION
110 ____________
112 AUTOMATIC ELECTRICAL CONTROLS –
114 Part 2-5: Particular requirements for
115 Automatic electrical burner control systems
117 FOREWORD
118 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all
119 national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-
120 operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition
121 to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available
122 Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to
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124 work. International, governmental and non-governmental organizations liaising with the IEC also participate in this
125 preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with
126 conditions determined by agreement between the two organizations.
127 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
128 consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC
129 National Committees.
130 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees
131 in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate,
132 IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user.
133 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently
134 to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication
135 and the corresponding national or regional publication shall be clearly indicated in the latter.
136 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment
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138 independent certification bodies.
139 6) All users should ensure that they have the latest edition of this publication.
140 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members
141 of its technical committees and IEC National Committees for any personal injury, property damage or other damage of
142 any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the
143 publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
144 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
145 indispensable for the correct application of this publication.
146 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights.
147 IEC shall not be held responsible for identifying any or all such patent rights.
148 IEC 60730-2-5 has been prepared by IEC technical committee 72: AUTOMATIC ELECTRICAL
149 CONTROLS. It is an International Standard.
150 This 5.0 edition cancels and replaces the 4.2 edition published in 2013, Amendment 1:2017 and
151 Amendment 2:2020. This edition constitutes a technical revision.
152 This edition includes the following significant technical changes with respect to the previous edition:
153 Adoption to IEC 60730-1 Ed.6.0 with all of its significant changes to IEC 60730-1 fifth edition:2013,
154 including Amendment 1:2015 and Amendment 2:2020.
155 The text of this International Standard is based on the following documents:
Draft Report on voting
XX/XX/FDIS XX/XX/RVD
157 Full information on the voting for its approval can be found in the report on voting indicated in the
158 above table.
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159 The language used for the development of this International Standard is English.
160 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
161 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available at
162 www.iec.ch/members_experts/refdocs. The main document types developed by IEC are described in
163 greater detail at www.iec.ch/publications.
164 A list of all parts of the IEC 60730 series, under the general title: AUTOMATIC ELECTRICAL CONTROL,
165 can be found on the IEC website.
166 This part 2-5 is intended to be used in conjunction with IEC 60730-1. It was established on the basis
167 of the sixth edition of that standard. Consideration may be given to future editions of, or amendments
168 to, IEC 60730-1.
169 This part 2-5 supplements or modifies the corresponding clauses in IEC 60730-1, so as to convert
170 that publication into the IEC standard: Particular requirements for electric actuators.
171 Where this part 2-5 states "addition", "modification" or "replacement", the relevant requirement, test
172 specification or explanatory matter in part 1 should be adapted accordingly.
173 When a particular clause or subclause of Part 1 is not mentioned in this part 2, that clause or
174 subclause applies.
175 In the development of a fully international standard it has been necessary to take into consideration
176 the differing requirements resulting from practical experience in various parts of the world and to
177 recognize the variation in national electrical systems and wiring rules.
178 The reader's attention is drawn to the fact that Q, Annex R, Annex S and Annex T list all of the "in-
179 some-country" clauses on differing practices of a less permanent nature relating to the subject of this
180 document.
181 In this publication:
182 1) The following print types are used:
183 – requirements proper: in roman type;
184 – test specifications: in italic type;
185 – explanatory matter: in smaller roman type.
186 – Defined terms: bold type.
187 2) Subclauses, notes or items which are additional to those in Part 1 are numbered starting from
188 101, additional annexes are lettered AA, BB, etc.
189 The committee has decided that the contents of this document will remain unchanged until the stability
190 date indicated on the IEC website under webstore.iec.ch in the data related to the specific document.
191 At this date, the document will be
192 • reconfirmed,
193 • withdrawn,
194 • replaced by a revised edition, or
195 • amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
IEC 60730-2-5 ED5 © IEC 2024 7 72/1460/CDV
199 AUTOMATIC ELECTRICAL CONTROLS –
201 Part 2-5: Particular requirements for automatic electrical burner control
202 systems
205 1 Scope
206 This clause of Part 1 is replaced by the following:
207 This document applies to automatic electrical burner control systems for the automatic control of
208 burners for oil, gas, coal or other combustibles intended to be used
209 • for household and similar use,
210 • in shops, offices, hospitals, farms and commercial and industrial applications.
211 NOTE 1 Throughout this document, where it can be used unambiguously, the word "system" means "burner control system"
212 and "systems" means "burner control systems".
213 • for equipment that is used by the public, such as equipment intended to be used in shops, offices,
214 hospitals, farms and commercial and industrial applications;
215 NOTE 2 Throughout this document, the word "equipment" means "appliance and equipment."
216 EXAMPLE 1 Controls for commercial catering, heating and air-conditioning equipment.
217 • that are smart enabled controls;
218 EXAMPLE 2 Remote interfaces/control of burner operations.
219 • that are AC or DC powered controls with a rated voltage not exceeding 690 V AC or 600 V DC;
220 • used in, on, or in association with equipment that use electricity, gas, oil, solid fuel, solar thermal
221 energy, etc., or a combination thereof;
222 • utilized as part of a control system or controls which are mechanically integral with multifunctional
223 controls having non-electrical outputs;
224 • using NTC or PTC thermistors and to discrete thermistors, requirements for which are contained
225 in Annex J;
226 • that are mechanically or electrically operated, responsive to or controlling such characteristics as
227 temperature, pressure, passage of time, humidity, light, electrostatic effects, flow, or liquid level,
228 current, voltage, acceleration, or combinations thereof;
229 • as well as manual controls when such are electrically and/or mechanically integral with automatic
230 controls.
231 NOTE 3 Requirements for manually actuated mechanical switches not forming part of an automatic control are contained
232 in IEC 61058-1-1.
233 This document is applicable
234 • to a complete burner control system,
235 • to a separate programming unit,
236 • to a separate electronic high-voltage ignition source,
237 • to a separate flame detector and
238 • to a separate high-temperature operation (HTO) detector.
239 • to a burner control system intended to be used in warm air heating appliances (furnaces) where
240 the appliance is equipped with an electromechanical differential pressure control to monitor the
241 difference of the combustion air pressure (Type 2.AL). This pressure control provides a switch as
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242 an alternative to one of the two switching elements to directly de-energize the safety relevant
243 terminals.
244 This document does not apply to thermoelectric flame supervision controls; thermoelectric flame
245 supervision controls are covered by ISO 23551-6.
246 This document also applies to electrical burner control systems intended exclusively for industrial
247 process applications e.g. those applications covered by ISO TC 244 (ISO 13577).
248 This document applies to controls powered by primary or secondary batteries, requirements for which
249 are contained within the standard.
250 This document applies to
251 – the inherent safety of automatic electrical burner control systems, and
252 – functional safety of automatic electrical burner control systems,
253 – automatic electrical burner control systems where the performance (for example the effect of
254 EMC phenomena) of the product can impair the overall safety and performance of the controlled
255 system,
256 – the operating values, operating times, and operating sequences where such are associated with
257 burner safety and to the testing of automatic electrical burner control systems used in, on, or in
258 association with, burners.
259 NOTE 4 Requirements for specific operating values, operating times and operating sequences are given in the
260 standards for appliances and equipment.
261 This document specifies the requirements for construction, operation and testing of automatic
262 electrical burner control systems used in, on, or in association with an equipment.
263 This document applies also to systems
264 • incorporating electronic devices
265 • using NTC or PTC thermistors, additional requirements for which are contained in Annex J.
266 • to the electrical and functional safety of controls capable of receiving and responding to
267 communications signals. The signals may be transmitted to or received from external units,
268 connected wired or wireless, that may or may not be part of the burner control system.
269 This document does not
270 • take into account the response value of an automatic action of a control, if such a response value
271 is dependent upon the method of mounting the control in the equipment. Where a response value
272 is of significant purpose for the protection of the user, or surroundings, the value defined in the
273 appropriate equipment standard or as determined by the manufacturer will apply.
274 • address the integrity of the output signal to the network devices, such as interoperability with other
275 devices unless it has been evaluated as part of the control system.
276 2 Normative references
277 This clause of Part 1 is applicable except as follows:
278 Addition:
279 IEC 60068-2-6, Environmental testing – Part 2: Tests – Test Fc: Vibration (sinusoidal)
280 ISO/IEC 80079-20-1:2017, Explosive atmospheres – Part 20-1: Material characteristics for gas and
281 vapour classification – Test methods and data
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282 ISO 23551-6:2021, Safety and control devices for gas burners and gas-burning appliances –
283 Particular requirements – Part 6: Thermoelectric flame supervision controls
284 3 Terms and definitions
285 This clause of Part 1 is applicable except as follows:
286 3.2 Definitions of types of control according to purpose
287 3.2.19 Not applicable
288 Additional definitions:
289 3.2.101
290 burner control system
291 system which includes a programming unit, a flame detector or, if applicable, an HTO detector and
292 may include an ignition source and/or ignition device and which monitors the operation of fuel burners
293 Note 1 to entry: The various functions of the system may be in one or more housings.
294 3.2.102
295 flame detector
296 device which provides the programming unit with a signal indicating the presence or absence of
297 flame
298 Note 1 to entry: It includes the flame sensor and may include an amplifier and a relay for signal transmission. The
299 amplifier and relay may be in its own housing or combined with the programming unit.
300 3.2.103
301 flame sensor
302 device which senses the flame and provides the input signal to the flame detector amplifier
303 Note 1 to entry: Examples are optical sensors and flame electrodes (flame rods).
304 3.2.104
305 ignition source
306 electrical or electronic system component which provides energy to an ignition device
307 Note 1 to entry: It may be separated from or incorporated in the programming unit. Examples are ignition transformers and
308 electronic high-voltage generators.
309 3.2.105
310 ignition device
311 device mounted on or adjacent to a burner for igniting fuel at the burner
312 Note 1 to entry: Examples are pilot burners, spark electrodes and hot surface igniters.
313 3.2.106
314 programming unit
315 device which controls the burner operation in a declared sequence from start-up to shut-down within
316 declared timings and in response to signals from regulating, limiting and monitoring devices
317 3.2.107
318 multitry system
319 system that allows more than one valve open period during its declared operating sequence
320 3.2.108
321 HTO detector
322 device which provides the programming unit with a signal indicating presence or absence of HTO
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323 Note 1 to entry: It includes the HTO-sensor and may include an amplifier and a relay for signal transmission. The amplifier
324 and relay may be in its own housing or combined with the programming unit.
325 3.2.109
326 HTO-sensor
327 device which senses the temperature of a surface or a medium within the combustion chamber which
328 is in direct contact with a flammable fuel-air mixture and provides a signal indicating presence or
329 absence of HTO
330 3.2.110
331 auto-ignition temperature
332 AIT
333 lowest temperature (of a surface) at which under specified test conditions an ignition of a flammable
334 gas or vapour in mixture with air or air-inert gas occurs
335 [SOURCE: ISO/IEC 80079-20-1:2017,3.3]
336 “Note 1 to entry: Lowest temperature that ignites flammable gas without an additional external source of ignition like spark
337 or arc”
338 3.2.111
339 high-temperature operation
340 HTO
341 operation on the basis of auto-ignition temperature which assures ignition and burning of fuel
342 Note 1 to entry: High-temperature operation is used e.g. in fuel cells (IEC 62282-3-100) and in industrial furnaces and
343 associated processing equipment (ISO 13577) where ignition and burning is detected by means of sensing the temperature.
344 3.3 Definitions relating to the function of controls
345 3.3.30
346 maximum temperature
347 T
max
348 Modification: Replace "switch head" by "burner control system."
349 3.3.31 safety shut-down
350 Replacement:
351 de-energization of the main fuel flow means as the result of the action of a limiter, a cut-out or the
352 detection of an internal fault of the system
353 Note 1 to entry: Safety shut-down may include additional actions by the system.
355 Add the following definitions
356 3.3.101
357 automatic recycle
358 automatic repetition of the start-up procedure, without manual intervention, following loss of the
359 supervised flame and subsequent fuel supply shutoff
360 3.3.102
361 controlled shut-down
362 de-energization of the fuel flow means as a result of the opening of a control loop by a control device
363 such as a thermostat leading the system to return to the start position
364 Note 1 to entry: Controlled shut-down may include additional actions by the system.
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365 3.3.103
366 flame detector response time
367 period of time between the loss of the sensed flame and the signal indicating the absence of flame
368 3.3.104
369 flame detector operating characteristics
370 that function of the flame detector which indicates absence or presence of flame as the output signal
371 of the flame detector relating to the input signal
372 Note 1 to entry: Normally the input signal is provided by a flame sensor.
373 3.3.104.1
374 signal for presence of flame
375 S
376 minimum signal which indicates the presence of flame when there was previously no flame
377 3.3.104.2
378 signal for absence of flame
379 S
380 maximum signal which indicates the loss of flame
381 Note 1 to entry: S is less than S .
2 1
382 3.3.104.3
383 maximum flame signal
384 S
max
385 maximum signal which does not affect the timings or the sequence
386 3.3.104.4
387 signal for visible light flame simulation
388 S
389 minimum signal which indicates the presence of flame during the visible light flame simulation test
390 Note 1 to entry: S is less than S .
3 2
391 3.3.105
392 self-checking flame detector
393 flame detector which checks for correct operation of the flame detector and its associated
394 electronic circuitry while the burner is in the running position
395 3.3.106
396 flame detector self-checking rate
397 frequency of the self-checking function of the flame detector (in number of operations per unit of
398 time)
399 3.3.107
400 flame failure lock-out time
401 flame failure response time
402 period of time between the signal indicating absence of flame and lock-out
403 3.3.108
404 flame failure re-ignition time
405 relight time
406 period of time between the signal indicating absence of flame and the signal to energize the ignition
407 device, during which the fuel supply is not shut off
408 3.3.109
409 flame signal
410 output signal of the flame detector
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411 3.3.110
412 flame simulation
413 condition which occurs when the flame detector indicates the presence of flame when in reality no
414 flame is present
415 3.3.111
416 ignition time
417 period of time during which the ignition device is energized
418 3.3.112
419 lock-out
420 process in which the system goes into one of the following lock-out conditions, following safety shut-
421 down
422 3.3.112.1
423 non-volatile lock-out
424 condition such that a restart can only be accomplished by a manual reset of the system and by no
425 other cause
426 3.3.112.2
427 volatile lock-out
428 condition such that a restart can be accomplished by either a manual reset of the system or by an
429 interruption of the power supply and its subsequent restoration
430 3.3.113
431 main flame establishing period
432 period of time between the signal to energize the main fuel flow means and the signal indicating
433 presence of the main burner flame
434 3.3.114
435 pilot flame establishing period
436 period of time between the signal to energize the pilot fuel flow means and the signal indicating
437 presence of the pilot flame
438 3.3.115
439 post-ignition time
440 period of the ignition time between the signal indicating presence of flame and the signal to de-
441 energize the ignition device
442 3.3.116
443 pre-ignition time
444 period of the ignition time between the signal to ignite and the signal to energize the fuel flow means
445 3.3.117
446 proved igniter
447 proved igniter system
448 system in which the fuel flow means is energized only after the availability of sufficient energy to
449 ignite the fuel has been verified
450 Note 1 to entry: Examples are systems using spark supervision and those using proved hot surface igniters.
451 3.3.117.1
452 proved igniter operating value
453 signal which indicates that the proved igniter has the energy to ignite the fuel
454 3.3.117.2
455 igniter proving time
456 period of time between the signal to energize the proved igniter and the signal to energize the fuel
457 flow means
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458 3.3.117.3
459 igniter failure response time
460 period of time between loss of the supervised proved igniter and the signal to de-energize the fuel
461 flow means
462 3.3.118
463 purge time
464 period during which air is introduced to displace any remaining air/fuel mixtures or products of
465 combustion from the combustion zone and flue ways
466 Note 1 to entry: No fuel is admitted during this period.
467 3.3.118.1
468 post-purge time
469 purge time that takes place immediately following the shutting off of the fuel supply
470 3.3.118.2
471 pre-purge time
472 purge time that takes place between initiation of a burner control sequence and the admission of
473 fuel to the burner
474 3.3.119
475 re-ignition
476 relight
477 process by which, following loss of the flame signal, the ignition device will be re-energized without
478 interruption of the fuel flow means
479 3.3.120
480 recycle time
481 period of time between the signal to de-energize the fuel flow means following the loss of flame and
482 the signal to begin a new start-up procedure
483 3.3.121
484 running position
485 position denoting that the main burner flame is established and supervised, or the burner is in HTO
486 and supervised
487 3.3.122
488 start position
489 position which denotes that the system is not in the lock-out condition and has not yet received the
490 start signal, but can proceed with the start-up sequence if required
491 3.3.123
492 start signal
493 signal, for example, from a thermostat, which releases the system from its start position
494 3.3.124
495 start-up lock-out time
496 period of time between the signal to energize the fuel flow means and lock-out
497 Note 1 to entry: For systems which control two separate fuel flow means, two different start-up lock-out times are possible
498 (first and second start-up lock-out times).
499 3.3.125
500 waiting time
501 period between the start signal and the signal to energize the ignition device
502 Note 1 to entry: For burners without fans, natural ventilation of the combustion chamber and the flue passages normally
503 takes place during this time.
IEC 60730-2-5 ED5 © IEC 2024 14 72/1460/CDV
504 3.3.126
505 valve open period
506 for multitry systems, the period of time between the signal to energize the fuel flow means, and the
507 signal to de-energize the fuel flow means, if proof of the supervised burner flame is not established
508 3.3.127
509 valve sequence period
510 for multitry systems, the sum of all valve opening periods prior to lock-out, if proof of the supervised
511 burner flame is not established
512 3.3.128
513 system restart
514 process by which, after a safety shut-down, a full start-up procedure is automatically repeated
515 3.3.129
516 reset from lock-out function
517 function that provides reset from lock-out allowing the system to attempt a restart
518 Note 1 to entry: The reset function may be performed by various electric/electronic (mobile) devices.
519 3.3.130
520 HTO detector response time
521 period of time between the temperature falling below the defined temperature limit for HTO and the
522 signal indicating the absence of HTO
523 3.3.131
524 HTO detector operating characteristics
525 that function of the HTO detector which indicates absence or presence of HTO as the output signal
526 of the HTO detector relating to the input signal
527 Note 1 to entry: Normally the input signal is provided by a HTO-sensor.
528 3.3.132
529 HTO response time
530 period of time between the signal indicating absence of HTO and proceeding to safety shut-down or
531 to switch over to flame supervision
532 3.3.133
533 HTO signal
534 output signal of the HTO detector
535 3.5 Definitions of types of control according to construction
536 Additional definitions:
537 3.5.101
538 system for permanent operation
539 system which is intended to remain in the running position for longer than 24 h without interruption
540 3.5.102
541 system for non-permanent operation
542 system which is intended to remain in the running position for less than 24 h
543 Additional definitions:
IEC 60730-2-5 ED5 © IEC 2024 15 72/1460/CDV
544 3.101 Definitions relating to the type of burner
545 3.101.1
546 continuous ignition
547 type of ignition which, once placed in operation, is intended to remain energized continuously until it
548 is manually interrupted
549 3.101.2
550 continuous pilot
551 pilot which, once placed in operation, is intended to remain ignited continuously until it is manually
552 interrupted
553 3.101.3
554 direct ignition
555 type of ignition which is applied directly to the main burner, without the use of a pilot
556 3.101.4
557 expanding pilot
558 form of continuous pilot where the pilot flame is increased or expanded when required to ignite the
559 main burner and reduced either immediately after main burner ignition, or after the main flame is shut
560 off
561 3.101.5
562 full rate start
563 condition in which the main burner ignition and subsequent flame supervision occur at full fuel rate
564 3.101.6
565 intermittent ignition
566 type of ignition which is energized when an appliance is called on to operate and which remains
567 continuously energized during each period of main burner operation and where the ignition is de-
568 energized when the main burner operating cycle is completed
569 3.101.7
570 intermittent pilot
571 pilot which is automatically ignited when an appliance is called on to operate and which remains
572 continuously ignited during each period of main burner operation and where the pilot is automatically
573 extinguished when each main burner operating cycle is completed
574 3.101.8
575 interrupted ignitio
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