SIST EN 125:2010+A1:2016

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Flammenüberwachungseinrichtungen für Gasgeräte - Thermoelektrische ZündsicherungenDispositifs de surveillance de flamme pour appareils à gaz - Dispositifs thermoélectriques de surveillance de flammeFlame supervision devices for gas burning appliances - Thermoelectric flame supervision devices27.060.20Plinski gorilnikiGas fuel burnersICS:Ta slovenski standard je istoveten z:EN 125:2010+A1:2015SIST EN 125:2010+A1:2016en,fr,de01-februar-2016SIST EN 125:2010+A1:2016SLOVENSKI
STANDARD



SIST EN 125:2010+A1:2016



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 125:2010+A1
November
t r s w ICS
t yä r x rä t r Supersedes EN
s t wã t r s rEnglish Version
Flame supervision devices for gas burning appliances æ Thermoelectric flame supervision devices Dispositifs de surveillance de flamme pour appareils à gaz æ Dispositifs thermoélectriques de surveillance de flamme
Flammenüberwachungseinrichtungen für Gasgeräte æ Thermoelektrische Zündsicherungen This European Standard was approved by CEN on
t t April
t r s r and includes Amendment
s approved by CEN on
w September
t r s wä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
9
t r s w CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s t wã t r s r ªA sã t r s w ESIST EN 125:2010+A1:2016



EN 125:2010+A1:2015 (E) 2 Contents Page European foreword . 5 1 Scope . 6 2 Normative references . 6 3 Terms and definitions . 6 4 Classification . 7 4.1 Classes of control . 7 4.2 Groups of control . 7 4.3 Classes of control functions . 7 5 Units of measurement and test conditions . 7 6 Construction requirements . 7 6.1 General . 7 6.2 Mechanical parts of the control . 7 6.2.1 Appearance . 7 6.2.2 Holes . 7 6.2.3 Breather holes . 7 6.2.4 Test for leakage of breather holes . 8 6.2.5 Screwed fastenings . 8 6.2.6 Jointing . 8 6.2.7 Moving parts . 8 6.2.8 Sealing caps . 8 6.2.9 Dismantling and reassembly . 8 6.3 Materials . 8 6.3.1 General material requirements . 8 6.3.2 Housing . 8 6.3.3 Test for leakage of housing after removal of non-metallic parts . 8 6.3.4 Zinc alloys . 8 6.3.5 Springs providing closing and/or sealing force . 8 6.3.6 Resistance to corrosion and surface protection . 8 6.3.7 Impregnation . 8 6.3.8 Seals for glands for moving parts . 8 6.4 Gas connections . 9 6.4.1 Making connections. 9 6.4.2 Connection sizes . 9 6.4.3 Threads . 9 6.4.4 Union joints . 9 6.4.5 Flanges . 9 6.4.6 Compression fittings . 9 6.4.7 Nipples for pressure test . 9 6.4.8 Strainers . 9 6.5 Electronic parts of the control . 9 6.6 Protection against internal faults for the purpose of functional safety . 9 7 Performance . 9 7.1 General . 9 7.2 Leak-tightness . 10 SIST EN 125:2010+A1:2016



EN 125:2010+A1:2015 (E) 3 7.3 Test for leak-tightness . 10 7.3.1 General . 10 7.3.2 External leak-tightness . 10 7.3.3 Internal leak-tightness . 11 7.4 Torsion and bending . 11 7.5 Torsion and bending tests . 11 7.6 Rated flow rate . 11 7.7 Test for rated flow rate . 11 7.7.1 Apparatus . 11 7.7.2 Test procedure . 11 7.7.3 Conversion of air flow rate . 11 7.8 Durability. 11 7.9 Performance tests for electronic controls . 12 7.10 Long-term performance for electronic controls . 12 7.101 Operating torque and force . 12 7.101.1 Requirement . 12 7.101.2 Test for operating torque and force . 12 7.102 Interlocks . 13 7.102.1 Requirement . 13 7.102.2 Test for interlocks . 13 7.103 Closing current . 13 7.103.1 Requirement . 13 7.103.2 Test for closing current . 13 7.104 Sealing force . 14 7.104.1 Requirement . 14 7.104.2 Test for sealing force . 14 7.105 Endurance . 14 7.105.1 Requirement . 14 7.105.2 Endurance test . 14 8 EMC/Electrical requirements . 15 9 Marking, installation and operating instructions . 15 9.1 Marking . 15 9.2 Installation and operating instructions . 16 9.3 Warning notice . 16 Annex A (informative)
Gas connections in common use in the various countries. 17 Annex B (informative)
Leak-tightness test
« volumetric method . 18 Annex C (informative)
Leak-tightness test
« pressure loss method . 19 Annex D (normative)
Conversion of pressure loss into leakage rate . 20 Annex E (normative)
Electrical/electronic component fault modes . 21 Annex F (normative)
Additional requirements for safety accessories and pressure accessories as defined in EU Directive 97/23/EC . 22 Annex G (normative)
Materials for pressurized parts . 23 Annex H (informative)
Additional materials for pressurized parts . 24 Annex I (normative)
Requirements for controls used in DC supplied gas burners and gas burning appliances . 25 Annex AA (informative)
Types of flame supervision devices . 26 SIST EN 125:2010+A1:2016



EN 125:2010+A1:2015 (E) 4 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 2009/142/EC relating to appliances burning gaseous fuels . 28 Bibliography . 30 Figures Figure AA.1 — Various types of thermoelectric flame supervision device in the closed position . 27 Figure AA.2 — Various types of thermoelectric flame supervision device in the operating and ignition position . 28 Tables Table 1 — Sequence of testing . 10 Table 2 — Maximum leakage rates . 10 Table 3 — Nominal sizes and operating torque . 12 Table 4 — Operating cycles . 15 Table ZA.1 — Correspondence between this European Standard and Directive 2009/142/EC relating to appliances burning gaseous fuels . 28
SIST EN 125:2010+A1:2016



EN 125:2010+A1:2015 (E) 5 European foreword This document (EN 125:2010+A1:2015) has been prepared by Technical Committee CEN/TC 58 “Safety and control devices for burners and appliances burning gaseous or liquid fuels”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2016, and conflicting national standards shall be withdrawn at the latest by May 2016. 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 includes Amendment 1 approved by CEN on 2015-09-05. This document supersedes !EN 125:2010". The start and finish of text introduced or altered by amendment is indicated in the text by tags !". 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. This document is intended to be used in conjunction with EN 13611:2007. This document refers to clauses of EN 13611:2007 or adapts clauses by stating "with the following modification", "with the following addition", "is replaced by the following" or "is not applicable" in the corresponding clause. This European Standard adds clauses or subclauses to the structure of EN 13611:2007 which are particular to this standard. It should be noted that these clauses and subclauses are not indicated as an addition. It should be noted that the following significant technical changes compared to the previous edition have been incorporated in this European Standard: a) alignment with EN 13611:2007; b) updating of Clause 2, Normative references; c) new declaration of nominal diameter and maximum inlet pressure. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 125:2010+A1:2016



EN 125:2010+A1:2015 (E) 6 1 Scope This European Standard specifies the safety, construction and performance requirements for thermoelectric flame supervision devices, energized by a thermocouple intended for use with gas burners, gas appliances and similar use, hereafter referred to as "controls". This European Standard is applicable to controls with declared maximum inlet pressures up to and including 500 kPa (5 bar) of nominal connection sizes up to and including DN 50 for use with one or more fuel gases in accordance with EN 437. This European Standard is not applicable to: a) the thermocouple; b) controls which use auxiliary energy (e.g. electrical energy supplied externally). 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 13611:2007, Safety and control devices for gas burners and gas burning appliances — General requirements 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13611:2007 and the following apply. 3.101 thermocouple thermoelectric flame sensing element that responds to the temperature of the supervised flame, and in which the flame effect produces an electromotive force (e.m.f.) 3.102 flame supervision device control which, in response to the e.m.f. produced by the thermocouple, maintains the gas way to the main burner or the main burner and the pilot burner open and which shuts off the gas way to the main burner at least, after extinction of the supervised flame NOTE For further reference see Figure AA.1 and Figure AA.2. 3.103 ignition interlock part which prevents the igniter from operating as long as the main gas way is open 3.104 re-start interlock mechanism which prevents the re-opening of the gas way to the main burner or to the main burner and the pilot burner until the armature plate has separated from the magnetic element NOTE For further reference see Figure AA.1 and Figure AA.2. SIST EN 125:2010+A1:2016



EN 125:2010+A1:2015 (E) 7 3.105 sealing force force acting on the closure member when the closure member is in the closed position, independent of any force provided by fuel gas pressure 3.106 closed position position of the closure member(s) in the absence of the thermoelectric energy 4 Classification 4.1 Classes of control EN 13611:2007, 4.1 is replaced by the following: Controls shall be classified A, B or C according to the number of operations as tested in 7.105.2.2. 4.2 Groups of control Shall be according to EN 13611:2007, 4.2. 4.3 Classes of control functions EN 13611:2007, 4.3 is not applicable. 5 Units of measurement and test conditions Shall be according to EN 13611:2007, Clause 5. 6 Construction requirements 6.1 General Shall be according to EN 13611:2007, 6.1 with the following addition: Controls shall shut off the gas way to the burner automatically with at least the sealing force specified in 7.104 in case of failure in the thermoelectric current. Controls shall also be designed so that during ignition either the gas way to the main burner is open, if there is no pilot burner, or the gas way to the main burner is closed and that to the pilot burner is open. 6.2 Mechanical parts of the control 6.2.1 Appearance Shall be according to EN 13611:2007, 6.2.1. 6.2.2 Holes Shall be according to EN 13611:2007, 6.2.2. 6.2.3 Breather holes EN 13611:2007, 6.2.3 is not applicable. SIST EN 125:2010+A1:2016



EN 125:2010+A1:2015 (E) 8 6.2.4 Test for leakage of breather holes EN 13611:2007, 6.2.4 is not applicable. 6.2.5 Screwed fastenings Shall be according to EN 13611:2007, 6.2.5. 6.2.6 Jointing Shall be according to EN 13611:2007, 6.2.6. 6.2.7 Moving parts Shall be according to EN 13611:2007, 6.2.7. 6.2.8 Sealing caps Shall be according to EN 13611:2007, 6.2.8. 6.2.9 Dismantling and reassembly Shall be according to EN 13611:2007, 6.2.9. 6.3 Materials 6.3.1 General material requirements Shall be according to EN 13611:2007, 6.3.1. 6.3.2 Housing Shall be according to EN 13611:2007, 6.3.2. 6.3.3 Test for leakage of housing after removal of non-metallic parts Shall be according to EN 13611:2007, 6.3.3 with the following addition: The test shall be performed in accordance with 7.3.2. 6.3.4 Zinc alloys Shall be according to EN 13611:2007, 6.3.4. 6.3.5 Springs providing closing and/or sealing force Shall be according to EN 13611:2007, 6.3.5. 6.3.6 Resistance to corrosion and surface protection Shall be according to EN 13611:2007, 6.3.6. 6.3.7 Impregnation Shall be according to EN 13611:2007, 6.3.7. 6.3.8 Seals for glands for moving parts Shall be according to EN 13611:2007, 6.3.8. SIST EN 125:2010+A1:2016



EN 125:2010+A1:2015 (E) 9 6.4 Gas connections 6.4.1 Making connections Shall be according to EN 13611:2007, 6.4.1. 6.4.2 Connection sizes Shall be according to EN 13611:2007, 6.4.2. 6.4.3 Threads Shall be according to EN 13611:2007, 6.4.3. 6.4.4 Union joints Shall be according to EN 13611:2007, 6.4.4. 6.4.5 Flanges Shall be according to EN 13611:2007, 6.4.5. 6.4.6 Compression fittings Shall be according to EN 13611:2007, 6.4.6. 6.4.7 Nipples for pressure test Shall be according to EN 13611:2007, 6.4.7. 6.4.8 Strainers Shall be according to EN 13611:2007, 6.4.8 with the following addition: Strainers fitted to controls of DN 25 and above shall be accessible for cleaning or replacement without the need to remove the control body by dismantling threaded or welded pipe work. 6.5 Electronic parts of the control EN 13611:2007, 6.5 is not applicable. 6.6 Protection against internal faults for the purpose of functional safety EN 13611:2007, 6.6 is not applicable. 7 Performance 7.1 General Shall be according to EN 13611:2007, 7.1 with the following addition: Tests shall be conducted in the sequence shown in Table 1. SIST EN 125:2010+A1:2016



EN 125:2010+A1:2015 (E) 10 Table 1 — Sequence of testing Clauses no. Type of test 7.3 Test for leak-tightness 7.7 Test for rated flow rate 7.101.2 Test for operating torque and force 7.102.2 Test for interlocks 7.104.2 Test for sealing force 7.103.2 Test for closing current 7.5 Torsion and bending tests 7.105.2.1 Static endurance test 7.105.2.2 Dynamic endurance test 7.8 Durability 6.3.3 Test for leakage of housing after removal of non-metallic parts 7.2 Leak-tightness EN 13611:2007, 7.2 is replaced by the following: Controls shall be leak-tight in accordance with the leakage rates given in Table 2. Table 2 — Maximum leakage rates Gas connection
nominal inlet size DN Maximum leakage rates cm³/h of air Internal leak tightness External leak tightness Closed (de-energized) position Ignition position Operating and closed
(de-energized) position Ignition position DN < 10 20 5 000 20 170 10
¶ DN
¶
t w 40 40 190
t w
´ DN
¶
w r 60 60 210 Closure parts shall remain leak-tight after dismantling and reassembly. 7.3 Test for leak-tightness 7.3.1 General Shall be according to EN 13611:2007, 7.3.1. 7.3.2 External leak-tightness Shall be according to EN 13611:2007, 7.3.2 with the following addition: Pressurize the inlet and outlet(s) of the control to the test pressures given in 7.3.1. Before the test, closure parts which may be dismantled in accordance with 6.2.9 shall be dismantled and reassembled five times to the manufacturer's instructions and the leakage rate for each of the mentioned conditions below is measured. SIST EN 125:2010+A1:2016



EN 125:2010+A1:2015 (E) 11 a) The Control shall be operated such that all closure members in the control are in the open position. Any suitable electrical source may be used during the test. The inlet and outlet(s) of the control shall then be pressurized to the test pressure according to 7.3.1. b) The test of a) shall then be carried out with the electrical source removed so that the main and pilot gas ways (for protected pilots) in the control are closed. c) The test of a) shall then be repeated with any spindle moved during ignition and held in the ignition position. 7.3.3 Internal leak-tightness EN 13611:2007, 7.3.3 is replaced by the following: Closed position Test in the closed position the leakage of the de-energized control in the direction of gas flow, at the test pressures given in 7.3.1 and measure the leakage rate. If there is more than one closure member in the control, the test shall be repeated with each closure member in turn in the closed position, all the other closure members being fully open. Ignition position For controls equipped with a pilot burner outlet, this outlet shall be blocked. Test in the ignition position the leakage of the de-energized control in the direction of gas flow at the test pressures given in 7.3.1 and measure the leakage rate. 7.4 Torsion and bending Shall be according to EN 13611:2007, 7.4. 7.5 Torsion and bending tests Shall be according to EN 13611:2007, 7.5. 7.6 Rated flow rate EN 13611:2007, 7.6 is replaced by the following: The flow rate when measured according to 7.7 shal
...