1、BS EN 777-3:2009ICS 91.140.40NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDMulti-burner gas-firedoverhead radiant tubeheater systems for nondomestic usePart 3: System F SafetyThis British Standardwas published under theauthority of the StandardsPolicy and Stra
2、tegyCommittee on 30 April2009 BSI 2009ISBN 978 0 580 55847 4Amendments/corrigenda issued since publicationDate CommentsBS EN 777-3:2009National forewordThis British Standard is the UK implementation of EN 777-3:2009. Itsupersedes BS EN 777-3:2000 which is withdrawn.The UK participation in its prepar
3、ation was entrusted to TechnicalCommittee GSE/20, Non-domestic space heaters (gas).A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its co
4、rrect application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 777-3:2009EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 777-3March 2009ICS 91.140.40 Supersedes EN 777-3:1999 English VersionMulti-burner gas-fired overhead radiant tube heater systems fornon
5、domestic use - Part 3: System F - SafetyTubes radiants suspendus multi-brleurs utilisant lescombustibles gazeux usage non-domestique - Partie 3 :Systme F - ScuritDunkelstrahlersysteme mit mehreren Brennern mit Geblsefr gewerbliche und industrielle Anwendung - Teil 3:System F - SicherheitThis Europea
6、n Standard was approved by CEN on 24 January 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concer
7、ning such nationalstandards 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 translationunder the responsibility of a CEN member into its own la
8、nguage and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Lu
9、xembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights
10、 of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 777-3:2009: EBS EN 777-3:2009EN 777-3:2009 (E) 2 Contents Page Foreword . 41 Scope 52 Normative references . 53 Terms and definitions . 63.1 System and its constituent parts 63.2 Adjusting, control a
11、nd safety devices 93.3 System operation 103.4 Gases 133.5 Conditions of operation and measurement 143.6 Country of destination 144 System classification 154.1 Classification according to the nature of the gases used (categories) 154.2 Classification according to the gases capable of being used . 154
12、.3 Classification according to the mode of evacuation of the combustion products 175 Constructional requirements . 175.1 General . 175.2 Requirements for adjusting, control and safety devices 225.3 Ignition devices . 275.4 Main burners 285.5 Pressure test points 285.6 Injectors . 286 Operational req
13、uirements 296.1 Soundness . 296.2 Heat inputs . 296.3 Limiting temperatures 296.4 Ignition, cross-lighting and flame stability . 306.5 Pressure regulator 306.6 Combustion . 306.7 Air-proving device in the common duct . 316.8 Prolonged performance 316.9 Measurements of oxides of Nitrogen, NOx. 327 Te
14、st methods . 327.1 General . 327.2 Construction and design 397.3 Safety of operation 397.4 Other pollutants 528 Marking and instructions . 558.1 Marking of the system and the packaging . 558.2 Instructions 598.3 Presentation 639 Evaluation of conformity of POCEDs and their associated terminals 639.1
15、 General . 639.2 Type testing . 639.3 Factory production control (FPC) . 64Annex A (informative) National situations . 66A.1 General . 66A.2 Categories listed in the body of the standard and marketed in different countries 66BS EN 777-3:2009EN 777-3:2009 (E) 3 A.3 Appliance supply pressures correspo
16、nding to the categories given in A.2 68A.4 Special categories marketed nationally or locally . 70A.5 Test gases corresponding to the special categories given in A.4 . 74A.6 Gas connections in the various countries . 75A.7 Flue connections in the various countries . 77Annex B (informative) System F .
17、 78Annex C (informative) Equivalence rules . 79C.1 Conversion to categories within a restricted Wobbe Index range 79C.2 Conversion to categories within an identical Wobbe Index range 79C.3 Conversion to categories within a wider Wobbe Index range 80Annex D (informative) Calculation of the mass flow
18、rate of flue gases 81D.1 Flue gas mass flow rate 81D.2 Quantity of air in the flue gas 81D.3 Flue gas excess air ratio () . 82D.4 Quantity of water vapour in the flue gas 82D.5 Quantity of Nitrogen in the flue gas 82D.6 Quantity of Oxygen in the flue gas 82D.7 Dry quantity of flue gas 83D.8 Quantity
19、 of carbon dioxide in the flue gas . 83Annex E (informative) Identification of gas types in use in various countries 85Annex F (normative) Special national conditions . 86F.1 General . 86Annex G (informative) Calculation example of the weighting factors for a system with several rates 87G.1 Applianc
20、e rates . 87G.2 Weighting of Qpi,%= 20 87G.3 Weighting of Qpi,%= 40 87G.4 Weighting of Qpi,%= 60 87G.5 Weighting of Qpi,%= 70 88G.6 Total weighting 88Annex H (informative) NOxconversion calculation . 89H.1 NOxemission conversion factors 89H.2 NOxConversion Calculation 90Annex I (informative) Nationa
21、l situations of countries whose national bodies are CEN associate members . 92Annex J (informative) An example of sampling plans 93J.1 Sampling plans 93J.2 Inspection levels and procedures . 94Annex K . 95K.1 General conditions of test 95K.2 Test conditions 95K.3 Test procedure 95K.4 Accuracy of mea
22、surement . 97K.5 Calculation of Flue Loss. 97Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives . 100Annex ZB (informative) Clauses of this European Standard addressing the provisions of the EU Construction Products Directi
23、ve 103ZB.1 Scope and relevant characteristics . 103ZB.2 Procedure(s) for attestation of conformity of construction products 105ZB.3 CE marking and labelling . 108Bibliography . 110BS EN 777-3:2009EN 777-3:2009 (E) 4 Foreword This document (EN 777-3:2009) has been prepared by Technical Committee CEN/
24、TC 180 “Domestic and non-domestic gas fired air heaters and non-domestic gas fired overhead radiant heaters”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the lates
25、t by September 2009, and conflicting national standards shall be withdrawn at the latest by September 2009. 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 al
26、l such patent rights. This document supersedes EN 777-3:1999. This revision modifies EN 777-3:1999. It has been prepared to incorporate requirements for combustion products evacuation ducts, POCEDs, supplied as an integral part of the system to support the EU Directive 89/106/EEC on construction pro
27、ducts under mandate M/105. To this end the systems within the scope of this standard are now defined as Type B52xand Type B53x rather than Type B22x and Type B23x.Furthermore, the opportunity presented by this revision has been taken to update the standard in respect to EN 437:2003. This document ha
28、s been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EC Directive(s). For relationship with EC Directive(s), see informative Annexes ZA and ZB, which are integral parts of this document. According to t
29、he CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithua
30、nia, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 777-3:2009EN 777-3:2009 (E) 5 1 Scope This European Standard specifies the requirements and test methods for the construction, safety, classification a
31、nd marking of non-domestic gas-fired overhead radiant tube heaters incorporated into a multi-burner system (called system F and referred to in the body of the text as the “system”) with each burner unit under the control of an automatic burner control system. This standard is applicable to Type B52x
32、and Type B53xsystems (see 4.3) intended for use in other than domestic dwellings, in which the supply of combustion air and/or the evacuation of the products of combustion is achieved by mechanical means. This standard is not applicable to: a) systems designed for use in domestic dwellings; b) outdo
33、or systems; c) systems of heat input in excess of 120 kW (based on the net calorific value of the appropriate reference test gas); d) systems having a draught diverter incorporated between the exhaust fan and the flue duct; e) systems having fully pre-mixed gas and air burners in which: 1) either th
34、e gas and all the combustion air are brought together just before the level of the combustion zone; or 2) the pre-mixing of the gas and all combustion air is carried out in a part of the burner upstream of the combustion zone; f) systems that are designed for continuous condensation within the flue
35、system under normal operating conditions; g) systems having combustion products evacuation ducts that are non-metallic. This standard is applicable to systems which are intended to be type tested. It also includes requirements concerning the evaluation of conformity, including factory production con
36、trol, but these requirements only apply to POCEDs and their associated terminals. NOTE Requirements for systems which are not intended to be type tested would need to be subject to further consideration. 2 Normative references The following referenced documents are indispensable for the application
37、of this document. For dated references, only the editions cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 88-1:2007, Pressure regulators and associated safety devices for gas appliances - Part 1: Pressure regulators for inle
38、t pressures up to and including 500 mbar EN 126:2004, Multifunctional controls for gas burning appliances EN 161:2007, Automatic shut-off valves for gas burners and gas appliances EN 257, Mechanical thermostats for gas-burning appliances BS EN 777-3:2009EN 777-3:2009 (E) 6 EN 298:2003, Automatic gas
39、 burner control systems gas burners and gas burning appliances with or without fans EN 437:2003, Test gases - Test pressures - Appliance categories EN 10226-1:2004, Pipe threads where pressure tight joints are made on the threads Part 1: Taper external threads and parallel internal threads - Dimensi
40、ons, tolerances and designation EN 10226-2:2005, Pipe threads where pressure tight joints are made on the threads Part 2: Taper external threads and taper internal threads - Dimensions, tolerances and designation EN 60335-1:2002, Household and similar electrical appliances Safety - Part 1: General r
41、equirements EN 60335-2-102:2006, Household and similar electrical appliances Safety - Part 2-102: Particular requirements for gas, oil and solid-fuel burning having electrical connections EN 60529:1992, Degrees of protection provided by enclosures (IP code) EN 60584-1:1995, Thermocouples Part 1: Ref
42、erence tables EN 60584-2:1993, Thermocouples Part 2: Tolerances EN ISO 228-1:2003, Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation (ISO 228-1:2000) EN ISO 3166-1:2006, Codes for the representation of names of countries and their s
43、ubdivisions Part 1: Country codes (ISO 3166-1:2006) EN ISO 6976:2005, Natural gas - Calculation of calorific values, density, relative density and Wobbe index from composition (ISO 6976:1995 including Corrigendum 1:1997, Corrigendum 2:1997 and Corrigendum 3:1999) ISO 7005-1:1992, Metallic flanges -
44、Part 1: Steel flanges ISO 7005-2:1988, Metallic flanges - Part 2: Cast iron flanges ISO 7005-3:1988, Metallic flanges - Part 3: Copper alloy and composite flanges CR 1404:1994, Determination of emissions from appliances burning gaseous fuels during type testing 3 Terms and definitions For the purpos
45、es of this standard the following terms and definitions apply: 3.1 System and its constituent parts 3.1.1 overhead radiant tube heater gas-fired appliance intended for installation above head level which is designed to heat the space beneath by radiation by means of a tube or tubes, heated by the in
46、ternal passage of combustion products 3.1.2 multi-burner systems those radiant tube heater systems which employ two or more burner units with each unit incorporating independent flame monitoring. BS EN 777-3:2009EN 777-3:2009 (E) 7 NOTE The units may be located in one or more sections of tubing. One
47、 or more fans may be used to assist in the evacuation of products of combustion or the supply of combustion air System F: a system in which individual units with a fan are connected to a common duct with a fan. Only one burner unit is situated in each branch tube (see Annex B) 3.1.3 branch tube for
48、the purposes of this part, a tube in which only one burner unit is situated and which only contains the products of combustion generated by this burner 3.1.4 common duct duct which receives products of combustion from two or more branch tubes for the purposes of evacuation to the outside 3.1.5 individual burner unit unit comprising a main burner and, if appropriate, an ignition burner. In addition, such components as are necessary to ignite the burner(s), monitor the flame and control the gas supply to
