SIST EN 125:2010

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 utilisant les combustibles gazeux - Dispositifs thermoélectriques de sécurité à l'allumage et à l'extinctionFlame supervision devices for gas burning appliances - Thermoelectric flame supervision devices27.060.20Plinski gorilnikiGas fuel burnersICS:Ta slovenski standard je istoveten z:EN 125:2010SIST EN 125:2010en,fr,de01-november-2010SIST EN 125:2010SLOVENSKI
STANDARDSIST EN 125:1997/A1:1997SIST EN 125:19971DGRPHãþD



SIST EN 125:2010



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 125
May 2010 ICS 27.060.20 Supersedes EN 125:1991English Version
Flame supervision devices for gas burning appliances - Thermoelectric flame supervision devices
Dispositifs de surveillance de flamme pour appareils brûlant du gaz - Dispositifs thermoélectriques de surveillance de flamme
Flammenüberwachungseinrichtungen für Gasgeräte - Thermoelektrische Zündsicherungen This European Standard was approved by CEN on 22 April 2010.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 125:2010: ESIST EN 125:2010



EN 125:2010 (E) 2 Contents Page Foreword .51Scope .62Normative references .63Terms and definitions .64Classification .74.1Classes of control .74.2Groups of control.74.3Classes of control functions .75Units of measurement and test conditions .76Construction requirements .76.1General .76.2Mechanical parts of the control .76.2.1Appearance .76.2.2Holes .76.2.3Breather holes .86.2.4Test for leakage of breather holes .86.2.5Screwed fastenings .86.2.6Jointing .86.2.7Moving parts .86.2.8Sealing caps .86.2.9Dismantling and reassembly .86.3Materials .86.3.1General material requirements .86.3.2Housing .86.3.3Test for leakage of housing after removal of non-metallic parts .86.3.4Zinc alloys .86.3.5Springs providing closing and/or sealing force .86.3.6Resistance to corrosion and surface protection .86.3.7Impregnation .96.3.8Seals for glands for moving parts.96.4Gas connections .96.4.1Making connections .96.4.2Connection sizes .96.4.3Threads .96.4.4Union joints .96.4.5Flanges .96.4.6Compression fittings .96.4.7Nipples for pressure test .96.4.8Strainers .96.5Electronic parts of the control .96.6Protection against internal faults for the purpose of functional safety .97Performance . 107.1General . 107.2Leak-tightness . 107.3Test for leak-tightness . 117.3.1General . 117.3.2External leak-tightness . 117.3.3Internal leak-tightness . 117.4Torsion and bending . 11SIST EN 125:2010



EN 125:2010 (E) 3 7.5Torsion and bending tests. 117.6Rated flow rate . 117.7Test for rated flow rate . 127.7.1Apparatus . 127.7.2Test procedure . 127.7.3Conversion of air flow rate . 127.8Durability . 127.9Performance tests for electronic controls . 127.10Long-term performance for electronic controls . 127.101Operating torque and force . 127.101.1Requirement . 127.101.2Test for operating torque and force . 137.102Interlocks . 137.102.1Requirement . 137.102.2Test for interlocks . 137.103Closing current . 137.103.1Requirement . 137.103.2Test for closing current . 137.104Sealing force . 147.104.1Requirement . 147.104.2Test for sealing force . 147.105Endurance . 147.105.1Requirement . 147.105.2Endurance test . 157.105.2.1Static endurance test . 157.105.2.2Dynamic endurance test . 158EMC/Electrical requirements . 159Marking, installation and operating instructions . 169.1Marking . 169.2Installation and operating instructions . 169.3Warning notice . 16Annex A (informative)
Gas connections in common use in the various countries . 17Annex B (informative)
Leak-tightness test − volumetric method . 18Annex C (informative)
Leak-tightness test − pressure loss method . 19Annex D (normative)
Conversion of pressure loss into leakage rate . 20Annex E (normative)
Electrical/electronic component fault modes . 21Annex F (normative)
Additional requirements for safety accessories and pressure accessories as defined in EU Directive 97/23/EC . 22Annex G (normative)
Materials for pressurized parts . 23Annex H (informative)
Additional materials for pressurized parts . 24Annex I (normative)
Requirements for controls used in DC supplied gas burners and gas burning appliances . 25Annex AA (informative)
Types of flame supervision devices . 26Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 2009/142/EC relating to appliances burning gaseous fuels . 28Bibliography . 30 Figures Figure AA.1 — Various types of thermoelectric flame supervision device in the closed position . 26Figure AA.2 — Various types of thermoelectric flame supervision device in the operating and ignition position . 27SIST EN 125:2010



EN 125:2010 (E) 4
Tables Table 1 — Sequence of testing . 10Table 2 — Maximum leakage rates . 10Table 3 — Nominal sizes and operating torque . 12Table 4 — Operating cycles . 15Table ZA.1 — Correspondence between this European Standard and Directive 2009/142/EC relating to appliances burning gaseous fuels . 28 SIST EN 125:2010



EN 125:2010 (E) 5 Foreword This document (EN 125:2010) 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 November 2010, and conflicting national standards shall be withdrawn at the latest by November 2010. 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 125:1991. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
SIST EN 125:2010



EN 125:2010 (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
...