1、BRITISH STANDARD BS EN 303-2:1999 Incorporating Amendment No. 1 Heating boilers Part 2: Heating boilers with forced draught burners Special requirements for boilers with atomizing oil burners The European Standard EN 303-2:1998, with the incorporation of amendment A1:2003, has the status of a Britis
2、h Standard ICS 91.140.10 BS EN 303-2:1999 This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 March 1999 BSI 15 September 2004 ISBN 0 580 30226 1 National forewor
3、d This British Standard is the official English language version of EN 303-2:1998, including amendment A1:2003. It supersedes BS EN 303-2:1992 which will be withdrawn. prEN 303-1 review has not been approved and therefore it is only possible to use EN 303-2:1998 in accordance with EN 303-1:1992 and
4、EN 303-4:1998. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by !“. The UK participation in its preparation was
5、 entrusted to Technical Committee RHE/10, Heating boilers, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on interpretation, or proposals for change, and keep UK interests informed; monitor related inte
6、rnational and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be foun
7、d in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are respo
8、nsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 12, an inside back cover and a back cover. The BSI copyright
9、notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 15311 15 September 2004 See national forewordEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 303-2 October 1998 + A1 September 2003 ICS 91.140.10 Supersedes
10、EN 303-2:1992 Descriptors: central heating, boilers, atomizing burners, liquid fuel appliances, specifications, thermal properties, thermal tests English version Heating boilers Part 2: Heating boilers with forced draught burners Special requirements for boilers with atomizing oil burners (includes
11、amendment A1:2003) Chaudires de chauffage Partie 2: Chaudires avec brleurs air souffl Prescriptions spciales pour chaudires avec brleurs fioul pulvrisation (inclut lamendement A1:2003) Heizkessel Teil 2: Heizkessel mit Geblsebrenner Spezielle Anforderungen an Heizkessel mit lzerstubungsbrennern (ent
12、hlt nderung A1:2003) This European Standard was approved by CEN on 6 June 1998; amendment A1 was approved by CEN on 3 April 2003. 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 standa
13、rd without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other lan
14、guage made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
15、 Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Bruss
16、els 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 303-2:1998 + A1:2003 EEN 303-2:1998 BSI 15 September 2004 2 Foreword This European Standard has been prepared by Technical Committee CEN/TC 57, Central heating boilers, the S
17、ecretariat of which is held by DIN. This European Standard supersedes EN 303-2:1992. 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 April 1999, and conflicting national standards shall be withdra
18、wn at the latest by April 1999. For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this standard. The following structure is intended for the standards for heating boilers: prEN 303-1, Heating boilers Part 1: Heating boilers with forced draught burners Term
19、inology, general requirements, testing and marking. prEN 303-2, Heating boilers Part 2: Heating boilers with forced draught burners Special requirements for boilers with atomizing oil burners. prEN 303-3, Heating boilers Part 3: Gas fired central heating boilers Assembly comprising a boiler body and
20、 a forced draught burner. prEN 303-4, Heating boilers Part 4: Heating boilers with forced draught burners Special requirements for boilers with forced draught oil burners with outputs up to 70 kW and a maximum operating pressure of 3 bar Terminology, special requirements, testing and marking. prEN 3
21、03-5, Heating boilers Part 5: Heating boilers for solid fuels, hand and automatically fired, with a nominal heat output of up to 300 kW Terminology, requirements, testing and marking. EN 304, Heating boilers test code for heating boilers for atomizing oil burners. The following requirements were tak
22、en into account and/or amended: a) limitation of the emissions; b) energy economy; c) prevention of burning; d) minimal boiler efficiency for full-load (100 %) and part-load (30 %) in Figure 1; e) taking-over of the formulas for calculation for boiler efficiency at full-/part-load; f) declaration of
23、 tolerances for the air ratio in Figure 1; g) Extension of the heat output from 300 kW up to 1 000 kW. If the boiler was already tested with a forced draught burner for gaseous fuels in accordance with EN 303-1 and EN 303-3, the tests described in 3.2 and 3.6 need not be performed. According to the
24、CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Swe
25、den, Switzerland and the United Kingdom. Foreword to amendment A1 This document (EN 303-2:1998/A1:2003) has been prepared by Technical Committee CEN/TC 57, Central heating boilers, the Secretariat of which is held by DIN. This amendment to the European Standard EN 303-2:1998 shall be given the statu
26、s of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2004, and conflicting national standards shall be withdrawn at the latest by March 2004. This document has been prepared under a mandate given to CEN by the European Commission and the Euro
27、pean 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 amendment to the European Standard EN 303-2:1998 specifies the requirements for low-temperature centr
28、al heating boilers. Its purpose is to complete, amend or shorten EN 303-2:1998. This does not affect the main standard. WARNING. Other requirements and other EU Directives may be applicable to the products falling within the scope of this European Standard. According to the CEN/CENELEC Internal Regu
29、lations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sw
30、eden, Switzerland and the United Kingdom. EN 303-2:1998 BSI 15 September 2004 3 Contents Page Foreword 2 1S c o p e 4 2 Normative references 4 3 Performance requirements 4 4 Additional duration test for Oil-fired LowTemperature (LT) boilers 8 Annex A (informative) Emission limit values for boiler-un
31、its 9 Annex B (informative) A-deviations 9 Annex C (normative) Assembly criteria 10 Annex D (informative) Example of test evaluation for LT boilers for 3-months duration test 11 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Direc
32、tives 12EN 303-2:1998 4 BSI 15 September 2004 1 Scope This standard is applicable to heating boilers in accordance with prEN 303-1 up to a nominal heat output of 1 000 kW and prEN 303-4 up to a nominal heat output of 70 kW with atomizing oil burners in accordance with EN 267 which are designed for o
33、perating with liquid fuels. The requirements of this standard apply to type testing of heating boilers which are tested on a test rig in accordance with the test code given in EN 304. This standard specifies the necessary heating technical requirements for heating boilers with liquid fuels. NOTE Thi
34、s standard can also be used as the basis for evaluation of package boiler/burner units. !This European Standard applies to low-temperature boilers in accordance with EN 303-1/A1 and specifies the heating-related requirements necessary for liquid fuels for low-temperature boilers and the required add
35、itional duration test for oil-fired low-temperature boilers. “ 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed here
36、after. For dated references, subsequent amendments to or revision of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 267, Atomizing oil burners of mon
37、obloc type Testing. !EN 303-1, Heating boilers Part 1: Heating boilers with forced draught burners Terminology, general requirements, testing and marking. “ prEN 303-4, Heating boilers Part 4: Heating boilers with forced draught burners Special requirements for boilers with forced draught oil burner
38、s with outputs up to 70 kW and a maximum operating pressure of 3 bar Terminology, special requirements, testing and marking. EN 304, Heating boilers Test code for heating boilers for atomizing oil burners. 3 Performance requirements 3.1 General All the following performance tests are carried out usi
39、ng an oil atomizing burner in accordance with EN 267. The boiler shall meet the requirements shown in Figure 1 to Figure 5 for the nominal heat output or heat output range. Multi-stage or modulating burners shall operate within the output range of the boiler. If the manufacturer states that the boil
40、er also heats the room in which the boiler is installed, the output to the room shall be stated separately and can be taken into account when calculating the overall efficiency. For assembly criteria see Annex C. 3.2 Boiler efficiency 3.2.1 The boiler efficiency shall not be less than the appropriat
41、e values in Figure 1 for the nominal heat output and/or range of outputs. When comparing test results with the values in Figure 2, the following tolerances for the excess air shall apply: 300kW: 10% U3 0 0k W u p t o10 0 0k W : = 1,18 up to 1,22 EN 303-2:1998 BSI 15 September 2004 5 3.2.2 !For the u
42、seful efficiency in the power range k400 kW the following applies (see Figure 1). a) Useful efficiency for standard boilers at nominal output P n : U 84 + 2logP n . Useful efficiency for LT boilers at nominal output P n : U 87,5 + 1,5logP n . b) Useful efficiency for standard boilers at part load 0,
43、3P n : U 80 + 3logP n . Useful efficiency for LT boilers at part load 0,3P n : U 87,5 + 1,5logP n . “ 3.2.3 !For the useful efficiency in the power range 400 kW the following applies (see Figure 1). a) Useful efficiency for standard boilers nominal output P n : U 89,2. Useful efficiency for LT boile
44、rs at nominal output P n : U 91,4. b) Useful efficiency for standard boilers at part load 0,3P n : U 87,8. Useful efficiency for LT boilers at part load 0,3P n : U 91,4. The curves for the useful efficiency courses of the NT boilers are to be included in Figure 1. “ 3.3 Draught requirements and gas
45、side resistance The gas side resistance and draught shall be determined during the test in accordance with 3.1 and 3.2. For boilers which operate with negative pressure in the combustion chamber, the values of draught requirements shown in Figure 3 are normally to be regarded as limits. They are als
46、o guide values for the determination of the chimney size. For boilers which are operated with positive pressure in the combustion chamber, the values for the gas side resistance shown in Figure 4 are to be regarded as limits. If these values of gas side resistance or draught requirements are exceede
47、d, reference shall be made to this in the technical literature. 3.4 Exit gas temperature For boilers which, when operating at the nominal output or within their range of outputs have a flue gas temperature less than 160 C, the boiler manufacturer shall make recommendations regarding the flue install
48、ation. 3.5 Emission values During the tests in accordance with 3.1 (at nominal heat output) the smoke number shall not exceed 1 (see EN 267). The proportion of unburnt hydrocarbons in the exit flue gases shall not exceed 10 ppm, except during the first 20 seconds after entry of the fuel. The measure
49、ment shall be effected by a flame ionization detector (FID). The amount of pollution created by the combustion process shall be limited. This requirement is met if, while operating the boiler at minimum and maximum nominal outputs, the values given in Table 1 are not exceeded. Table 1 Emission limit values NOTE For purpose designed package boiler/burner units see also Annex A. The emission values are determined using ga
