1、BS EN 777-4:2009ICS 91.140.40NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDMulti-burner gas-firedoverhead radiant tubeheater systems for non-domestic usePart 4: System H SafetyThis British Standardwas published under theauthority of the StandardsPolicy and Str
2、ategyCommittee on 30 April2009 BSI 2009ISBN 978 0 580 55848 1Amendments/corrigenda issued since publicationDate CommentsBS EN 777-4:2009National forewordThis British Standard is the UK implementation of EN 777-4:2009. Itsupersedes BS EN 777-4:1999 which is withdrawn.The UK participation in its prepa
3、ration 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 c
4、orrect application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 777-4:2009EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 777-4March 2009ICS 91.140.40 Supersedes EN 777-4:1999 English VersionMulti-burner gas-fired overhead radiant tube heater systems fornon
5、-domestic use - Part 4: System H - SafetyTubes radiants suspendus multi-brleurs utilisant lescombustibles gazeux usage non-domestique - Partie 4 :Systme H - ScuritGasgerte-Heizstrahler Dunkelstrahlersysteme mitmehreren Brennern mit Geblse fr gewerbliche undindustrielle Anwendung - Teil 4: System H -
6、 SicherheitThis European 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 bibliograp
7、hical references concerning 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
8、 member into its own language 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
9、, Latvia, Lithuania, Luxembourg, 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 Bruss
10、els 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 777-4:2009: EBS EN 777-4:2009EN 777-4:2009 (E) 2 Contents Page Foreword . 4 1 Scope 5 2 Normative references . 5 3 Terms and definitions . 6 3.1 System and its constituent part
11、s 6 3.2 Combustion circuit . 8 3.3 Adjusting, control and safety devices 9 3.4 System operation 10 3.5 Gases 13 3.6 Conditions of operation and measurement 14 3.7 Country of destination 14 4 Classification of systems . 15 4.1 Classification according to the nature of the gases used (categories) 15 4
12、.2 Classification according to the gases capable of being used . 15 4.3 Classification according to the mode of evacuation of the combustion products 17 5 Constructional requirements . 17 5.1 General . 17 5.2 Requirements for adjusting, control and safety devices 22 5.3 Ignition devices . 26 5.4 Mai
13、n burners 27 5.5 Pressure test points 27 5.6 Injectors . 27 6 Operational requirements 28 6.1 Soundness . 28 6.2 Heat inputs . 28 6.3 Limiting temperatures 28 6.4 Ignition, cross-lighting and flame stability . 29 6.5 Pressure regulator 29 6.6 Combustion . 29 6.7 Prolonged performance 30 6.8 Measurem
14、ents of oxides of Nitrogen, NOx. 31 7 Test methods . 31 7.1 General . 31 7.2 Construction and design 38 7.3 Safety of operation 39 7.4 Other pollutants 53 8 Marking and instructions . 56 8.1 Marking of the system and the packaging . 56 8.2 Instructions 60 8.3 Presentation 64 9 Evaluation of conformi
15、ty of POCEDs and their associated terminals 64 9.1 General . 64 9.2 Type testing . 64 9.3 Factory production control (FPC) . 65 Annex A (informative) National situations . 67 A.1 General . 67 A.2 Categories listed in the body of the standard and marketed in different countries 67 BS EN 777-4:2009EN
16、777-4:2009 (E) 3 A.3 Appliance supply pressures corresponding to the categories given in A.2 69 A.4 Special categories marketed nationally or locally . 71 A.5 Test gases corresponding to the special categories given in A.4 . 75 A.6 Gas connections in the various countries . 76 A.7 Flue connections i
17、n the various countries . 78 Annex B (informative) System H . 79 Annex C (informative) Equivalence rules . 80 C.1 Conversion to categories within a restricted Wobbe Index range 80 C.2 Conversion to categories within an identical Wobbe Index range 80 C.3 Conversion to categories within a wider Wobbe
18、Index range 81 Annex D (informative) Calculation of the mass flow rate of flue gases 82 D.1 Flue gas mass flow rate 82 D.2 Quantity of air in the flue gas 82 D.3 Flue gas excess air ratio () . 83 D.4 Quantity of water vapour in the flue gas 83 D.5 Quantity of Nitrogen in the flue gas 83 D.6 Quantity
19、 of Oxygen in the flue gas 83 D.7 Dry quantity of flue gas 84 D.8 Quantity of carbon dioxide in the flue gas . 84 Annex E (informative) Identification of gas types in use in various countries 86 Annex F (normative) Special national conditions . 87 F.1 General . 87 Annex G (informative) Example of ca
20、lculation of the weighting factors for a system with several rates 88 G.1 Appliance rates . 88 G.2 Weighting of Qpi,%= 20 88 G.3 Weighting of Qpi,%= 40 88 G.4 Weighting of Qpi,%= 60 88 G.5 Weighting of Qpi,%= 70 89 G.6 Total weighting 89 Annex H (informative) Calculation of conversions of NOx. 90 H.
21、1 NOxemission conversion factors 90 H.2 NOxConversion Calculation 91 Annex I (informative) National situations of countries whose national bodies are CEN associate members . 93 Annex J (informative) An example of sampling plans 94 J.1 Sampling plans 94 J.2 Inspection levels and procedures . 95 Annex
22、 K (informative) Flue determination . 96 K.1 General conditions of test 96 K.2 Test conditions 96 K.3 Test procedure 96 K.4 Accuracy of measurement . 98 K.5 Calculation of Flue Loss. 98 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of
23、EU Directives . 101 Annex ZB (informative) Clauses of this European Standard addressing the provisions of the EU Construction Products Directive 104 ZB.1 Scope and relevant characteristics . 104 ZB.2 Procedure(s) for attestation of conformity of construction products 106 ZB.3 CE marking and labellin
24、g . 109 Bibliography . 111 BS EN 777-4:2009EN 777-4:2009 (E) 4 Foreword This document (EN 777-4:2009) has been prepared by Technical Committee CEN/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.
25、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 September 2009, and conflicting national standards shall be withdrawn at the latest by September 2009. Attention is drawn to the possibility that so
26、me 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 777-4:1999. This revision modifies EN 777-4:1999. It has been prepared to incorporate requirements for
27、combustion products evacuation ducts, POCEDs, supplied as an integral part of the system to support the EU Directive 89/106/EEC on construction products under mandate M/105. To this end the systems within the scope of this standard are now defined as Type B52rather than Type B22. Furthermore, the op
28、portunity presented by this revision has been taken to update the standard in respect to EN 437:2003. 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 EC Directive(s). For relations
29、hip with EC Directive(s), see informative Annexes ZA and ZB, which are integral parts of this document. 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, Cyprus
30、, 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. BS EN 777-4:2009EN 777-4:2009 (E) 5 1 S
31、cope This European Standard specifies the requirements and test methods for the construction, safety, classification and marking of non-domestic gas-fired overhead radiant tube systems incorporating two or more burner units with each burner under the control of an automatic burner control system, an
32、d operated by a single fan providing a single flue outlet, called system H and referred to in the body of the text as the “system”. This standard is applicable to Type B52systems (see 4.3) intended for use in other than domestic dwellings, in which the supply of combustion air and the evacuation of
33、the products of combustion is achieved by mechanical means. This standard is applicable only to such systems that have fully pre-mixed gas/air burners. This standard is not applicable to: a) systems designed for use in domestic dwellings; b) outdoor systems; c) systems of heat input in excess of 120
34、 kW (based on the net calorific value of the appropriate reference test gas); d) systems having a draught diverter; e) systems that are designed for continuous condensation within the flue system under normal operating conditions; f) systems having combustion products evacuation ducts that are non-m
35、etallic. 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 control, but these requirements only apply to POCEDs and their associated terminals. NOTE Requirements for systems
36、 which are not intended to be type tested would need to be subject to further consideration. Requirements concerning the rational use of energy have not been included in this European Standard. 2 Normative references The following referenced documents are indispensable for the application of this do
37、cument. 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 inlet pressure
38、s 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 EN 298:2003, Automatic gas burner control systems gas burners and gas bu
39、rning appliances with or without fans BS EN 777-4:2009EN 777-4:2009 (E) 6 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 - Dimensions, toler
40、ances 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 requirement
41、s 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: Reference tab
42、les 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 subdivision
43、s 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 - Part 1: St
44、eel flanges ISO 7005-2:1988, Metallic flanges - Part 2: Cast iron flanges ISO 7005-3:1988, Metallic flanges - Part 3: Copper flanges and composite flanges CR 1404:1994, Determination of emissions from appliances burning gaseous fuels during type testing 3 Terms and definitions For the purposes of th
45、is 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 internal p
46、assage 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. NOTE The units may be located in one or more sections of tubing. One or more fans may be used to assist in the e
47、vacuation of products of combustion or the supply of combustion air BS EN 777-4:2009EN 777-4:2009 (E) 7 System H: system in which individual units without fans are connected to a common duct with a fan. One or more burner units are situated in each branch tube (see Annex B). 3.1.3 branch tube for th
48、e purposes of this part, a tube in which one or more burner units is/are situated and which only contains the products of combustion generated by this, or these, burners 3.1.4 common duct duct which receives products of combustion from two or more branch tubes for the purposes of evacuation to the o
49、utside 3.1.5 individual burner unit unit comprising a main burner and, if appropriate, an ignition burner. In addition, such components which are necessary to ignite the burner(s), monitor the flame and control the gas supply to the burner(s) are included in the unit 3.1.6 inlet connection part of the system intended to be connected to the gas supply 3.1.7 mechanical joint means of ensuring the soundness of an assembly of several parts e.g. metal to metal joints, conical joints, toroidal sealing rings (“O” rings), flat joints without the use of liq
