1、BS EN 777-2:2009ICS 91.140.40NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDMulti-burner gas-firedoverhead radiant tubeheater systems for non-domestic usePart 2: System E SafetyThis British Standardwas published under theauthority of the StandardsPolicy and Str
2、ategyCommittee on 30 April2009 BSI 2009ISBN 978 0 580 55845 0Amendments/corrigenda issued since publicationDate CommentsBS EN 777-2:2009National forewordThis British Standard is the UK implementation of EN 777-2:2009. Itsupersedes BS EN 777-2:1999 which is withdrawn.The UK participation in its prepa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 777-2:2009EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 777-2March 2009ICS 91.140.40 Supersedes EN 777-2:1999 English VersionMulti-burner gas-fired overhead radiant tube heater systems fornon
5、-domestic use - Part 2: System E - SafetyTubes radiants suspendus multi-brleurs utilisant lescombustibles gazeux usage non-domestique - Partie 2 :Systme E - ScuritGasgerte-Heizstrahler - Dunkelstrahlersysteme mitmehreren Brennern mit Geblse fr gewerbliche undindustrielle Anwendung - Teil 2: System E
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 bibliogr
7、aphical 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 C
8、EN 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, Ita
9、ly, 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 Bru
10、ssels 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 777-2:2009: EBS EN 777-2:2009EN 777-2:2009 (E) 2 Contents Page Foreword . 4 1 Scope 5 2 Normative references . 5 3 Terms and definitions . 6 3.1 System and its constituent pa
11、rts 6 3.2 Adjusting, control and safety devices 9 3.3 System operation 10 3.4 Gases 13 3.5 Conditions of operation and measurement 14 3.6 Country of destination 14 4 System classification 15 4.1 Classification according to the nature of the gases used (categories) 15 4.2 Classification according to
12、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 . 27 5.4 Main burners 27 5.5 Pressure test
13、points 27 5.6 Injectors . 28 6 Operational requirements 28 6.1 Soundness . 28 6.2 Heat inputs . 28 6.3 Limiting temperatures 29 6.4 Ignition, cross-lighting and flame stability . 29 6.5 Pressure regulator 29 6.6 Combustion . 30 6.7 Prolonged performance 30 6.8 Measurement of oxides of Nitrogen, NOx.
14、 31 7 Test methods . 31 7.1 General . 31 7.2 Construction and design 38 7.3 Safety of operation 38 7.4 Other pollutants 51 8 Marking and instructions . 54 8.1 Marking of the system and the packaging . 54 8.2 Instructions 58 8.3 Presentation 62 9 Evaluation of conformity of POCEDs and their associate
15、d terminals 62 9.1 General . 62 9.2 Type testing . 62 9.3 Factory production control (FPC) . 63 Annex A (informative) National situations . 65 A.1 General . 65 A.2 Categories listed in the body of the standard and marketed in different countries 65 A.3 Appliance supply pressures corresponding to the
16、 categories given in A.2 67 BS EN 777-2:2009EN 777-2:2009 (E) 3 A.4 Special categories marketed nationally or locally . 69 A.5 Test gases corresponding to the special categories given in A.4 . 73 A.6 Gas connections in the various countries . 74 A.7 Flue connections in the various countries . 76 Ann
17、ex B (informative) System E . 77 Annex C (informative) Equivalence rules . 78 C.1 Conversion to categories within a restricted Wobbe Index range 78 C.2 Conversion to categories within an identical Wobbe Index range 78 C.3 Conversion to categories within a wider Wobbe Index range 79 Annex D (informat
18、ive) Calculation of flue gas mass flow rate . 80 D.1 Flue gas mass flow rate 80 D.2 Quantity of air in the flue gas 80 D.3 Flue gas excess air ratio () . 81 D.4 Quantity of water vapour in the flue gas 81 D.5 Quantity of Nitrogen in the flue gas 81 D.6 Quantity of Oxygen in the flue gas 82 D.7 Dry q
19、uantity of flue gas 82 D.8 Quantity of carbon dioxide in the flue gas . 82 Annex E (informative) Identification of gas types in use in various countries 84 Annex F (normative) Special national conditions . 85 F.1 General . 85 Annex G (informative) Calculation example of the weighting factors for a s
20、ystem with several rates 86 G.1 Appliance rates . 86 G.2 Weighting of Qpi,%= 20 86 G.3 Weighting of Qpi,%= 40 86 G.4 Weighting of Qpi,%= 60 86 G.5 Weighting of Qpi,%= 70 87 G.6 Total weighting 87 Annex H (informative) NOxconversion calculation . 88 H.1 NOxemission conversion factors 88 H.2 NOxConver
21、sion Calculation 89 Annex I (informative) National situations of countries whose national bodies are CEN associate members . 91 Annex J (informative) An example of sampling plans 92 J.1 Sampling plans 92 J.2 Inspection levels and procedures . 93 Annex K (informative) Flue determination . 94 K.1 Gene
22、ral conditions of test 94 K.2 Test conditions 94 K.3 Test procedure 94 K.4 Accuracy of measurement . 96 K.5 Calculation of Flue Loss. 96 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives . 99 Annex ZB (informative) Clauses
23、 of this European Standard addressing the provisions of the EU Construction Products Directive 102 ZB.1 Scope and relevant characteristics . 102 ZB.2 Procedure(s) for attestation of conformity of construction products 104 ZB.3 CE marking and labelling . 107 Bibliography . 109 BS EN 777-2:2009EN 777-
24、2:2009 (E) 4 Foreword This document (EN 777-2:2009) 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. This European Standard shall be given the status o
25、f 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 some of the elements of this document may be the sub
26、ject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 777-2:1999. This revision modifies EN 777-2:1999. It has been prepared to incorporate requirements for combustion products evacuation ducts, POCEDs, supp
27、lied 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 B52and Type B53 rather than Type B22 and Type B23. Furthermore, the opportunity presented by t
28、his 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 relationship with EC Directive(s)
29、, 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, Czech Republic, Denmar
30、k, 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 777-2:2009EN 777-2:2009 (E) 5 1 Scope This European Stand
31、ard specifies the requirements and test methods for the construction, safety, classification and marking of non-domestic gas-fired overhead radiant tube heaters incorporated into a multi-burner system (called system E and referred to in the body of the text as the system) with each burner unit under
32、 the control of an automatic burner control system. This standard is applicable to Type B52and Type B53systems (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
33、standard is not applicable to: a) systems designed for use in domestic dwelling; b) outdoor 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 between the exhaust fan and the flue duct;
34、e) systems having fully pre-mixed gas and air burners in which: 1) either the 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 zon
35、e; f) systems that are designed for continuous condensation within the flue 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 requiremen
36、ts concerning the evaluation of conformity, including factory production control, 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. Requirements concern
37、ing 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 document. For dated references, only the editions cited applies. For undated references, the latest edition of the
38、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 pressures up to and including 500 mbar EN 126:2004, Multifunctional controls for gas burning appliances EN 161:2007, Auto
39、matic shut-off valves for gas burners and gas appliances BS EN 777-2:2009EN 777-2:2009 (E) 6 EN 257, Mechanical thermostats for gas-burning appliances EN 298:2003, Automatic gas burner control systems for gas burners and gas burning appliances with or without fans EN 437:2003, Test gases - Test pres
40、sures - 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, tolerances and designation EN 10226-2:2005, Pipe threads where pressure tight joints are made on the threads Part2:
41、Taper external threads and taper internal threads. Dimensions, tolerances and designation EN 60335-1:2002, Household and similar electrical appliances Safety - Part 1: General requirements EN 60335-2-102:2006, Household and similar electrical appliances Safety - Part 2-102: Particular requirements f
42、or 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 tables EN 60584-2:1993, Thermocouples Part 2: Tolerances EN ISO 228-1:2003, Pipe threads where pressure-tight joints
43、 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 subdivisions Part 1: Country codes (ISO 3166-1:2006) EN ISO 6976:2005, Natural gas - Calculation of the calorific values, de
44、nsity, 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: Steel flanges ISO 7005-2:1988, Metallic flanges - Part 2: Cast iron flanges ISO 7005-3:1988, Metallic flanges -
45、 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 this standard the following terms and definitions apply: 3.1 System and its constituent parts 3.1.1 overhead ra
46、diant 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 passage of combustion products BS EN 777-2:2009EN 777-2:2009 (E) 7 3.1.2 multi-burner systems those radiant tu
47、be 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 evacuation of products of combustion or the supply of combustion air Sys
48、tem E: system in which individual units with a fan are connected to a common duct without a fan. Only one burner unit is situated in each branch tube. The fan may be at either end of the branch tube (see 4.3 and Annex B) 3.1.3 branch tube for the purposes of this part, a tube in which only one burne
49、r 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 the burner(s) are included in the unit 3.1.6 inlet connection part of the system intended to be connec
