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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 677:1998 The Europe
2、an Standard EN 677:1998 has the status of a British Standard ICS 91.140.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Gas-fired central heating boilers Specific requirements for condensing boilers with a nominal heat input not exceeding 70 kW This British Standard, having
3、 been prepared under the direction of the Sector Board for Engineering, was published under the authority of the Standards Board and comes into effect on 15 November 1998 BSI 1998 ISBN 0 580 28206 6 BS EN 677:1998 Amendments issued since publication Amd. No.DateText affected National foreword This B
4、ritish Standard is the English language version of EN 677:1998. It supersedes DD 189:1990, which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee GSE/29, Domestic gas-fired central heating boilers, which has the responsibility to: aid enquirers to understand
5、 the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can
6、be obtained on request to its secretary. The English-language ratified text of EN 677:1998 contained errors which have been corrected in this version of BS EN 677:1998. The corrections are as follows: in 5.6.1, in the paragraph after the equation, the word respectively has been changed to as well as
7、; in annex A the first term in the third equation has been changed from h to hu; and, to align with the French-language version, the clause entitled Special categories marketed nationally or locally in annex B has been renumbered B.3, and the first table in annex ZA has been numbered Table ZA.1. Cro
8、ss-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic C
9、atalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document
10、comprises a front cover, an inside front cover, the EN title page, pages 2 to 10, an inside back cover and a back cover. CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN A
11、ll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 677:1998 E EUROPEAN STANDARDEN 677 NORME EUROPE ENNE EUROPA ISCHE NORM June 1998 ICS: 91.140.10 Descriptors: Heaters, central heating, boilers, condensation, equipment specifications, perf
12、ormance evaluation, tests, technical notices English version Gas-fired central heating boilers Specific requirements for condensing boilers with a nominal heat input not exceeding 70 kW Chaudie res de chauffage central utilisant les combustibles gazeux Exigences spe cifiques aux chaudie res a conden
13、sation dont le de bit calorifique nominal est infe rieur ou e gal a 70 kW Heizkessel fu r gasfo rmige Brennstoffe Besondere Anforderungen an Brennwertkessel mit einer Nennwa rmebelastung kleiner als oder gleich 70 kW This European Standard was approved by CEN on 20 June 1998. CEN members are bound t
14、o 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 Centr
15、al Secretariat 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 Central Secretariat has the same status as t
16、he official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 2 EN 677:1998 BSI 1998 Foreword This European St
17、andard has been prepared by Technical Committee CEN/TC 109, Central heating boilers using gaseous fuels, the secretariat of which is held by NNI. 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 De
18、cember 1998, and conflicting national standards shall be withdrawn at the latest by December 1998. This European Standard 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 rel
19、ationship with EU Directive(s), see informative Annex ZA, which is an integral part of this standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, De
20、nmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3Definitions3 3.1condensing boiler3 3.2condensate3 3.3nominal condensing output3 3.4maximum a
21、llowable working temperature3 4Constructional requirements3 4.1Materials in contact with condensate3 4.2Removal of condensate3 4.3Control of the combustion products temperature3 4.4Chemical composition of the condensate4 5Operational requirements4 5.1General4 5.2Verification of the nominal condensin
22、g output4 5.3Formation of condensate4 5.4Temperature of combustion products4 5.5Combustion4 5.6Efficiencies4 6Test methods4 6.1General4 6.2Verification of the nominal condensing output4 6.3Formation of condensates5 6.4Temperature of combustion products5 6.5Combustion5 6.6Efficiencies5 7Marking5 7.1D
23、ata plate5 7.2Instructions5 Annex A (normative) Correction for the determined efficiency in the low water temperature test of condensing boilers6 Annex B (informative) Special national conditions7 Annex C (informative) A-deviations9 Annex ZA (informative) Clauses of this European Standard addressing
24、 essential requirements or other provisions of EU Directives.9 Page 3 EN 677:1998 BSI 1998 1 Scope This European Standard applies to gas-fired central heating boilers, which are declared by the manufacturer to be condensing boilers: of types B (excluding appliances without a fan) and C; using one or
25、 more gases corresponding to the three gas families; and for which the nominal heat input is less than or equal to 70 kW. This European Standard only covers type testing. This European Standard completes or modifies the standards EN 297, prEN 483 and EN 625, hereafter called boiler standards. It spe
26、cifies supplementary requirements for condensing 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 hereafter
27、. For dated references, subsequent amendments to or revisions 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 297, Gas-fired central heating boiler
28、s Type B11 and B11BSboilers fitted with atmospheric burners of nominal heat input not exceeding 70 kW. EN 437, Test gases Test pressures Appliances categories. prEN 483:1998 Gas-fired central heating boilers fitted Type C boilers, fitted with atmospheric burners of nominal heat input not exceeding 7
29、0 kW. EN 625, Gas-fired central heating boilers Specific requirements for the domestic hot water operation of combination boilers of nominal heat input not exceeding 70 kW. 3 Definitions For the purposes of this European Standard, the definitions of the boiler standards and the following definitions
30、 apply: 3.1 condensing boiler boiler in which, under normal operating conditions and at certain operating water temperatures, the water vapour in the combustion products is partially condensed, in order to make use of the latent heat of this water vapour for heating purposes and which satisfies the
31、efficiency requirements of this European Standard 3.2 condensate liquid formed from the combustion products during the condensation process 3.3 nominal condensing output value of the useful output declared by the manufacturer, in kW, corresponding to the operation of the boiler in a 50 8C/30 8C wate
32、r temperature regime 3.4 maximum allowable working temperature temperature the material can withstand over a long period of time under working conditions 4 Constructional requirements 4.1 Materials in contact with condensate All parts of the heat exchanger(s) and other parts of the boiler likely to
33、come into contact with condensate shall be constructed of sufficiently corrosion resistant materials or materials protected by a suitable coating in order to ensure a reasonable life for a boiler that is installed, used and maintained in accordance with the manufacturers instructions. 4.2 Removal of
34、 condensate Condensate produced during operation of the boiler, including condensate formed in the flue and its connecting pipes, shall be removed by means of a discharge pipe (or pipes). The internal diameter of the outside connection of the condensate discharge system shall be at least 13 mm. The
35、disposal system, forming part of the boiler or supplied with the boiler, shall be such that: it can be easily inspected and cleaned in accordance with the manufacturers instructions; it cannot transmit combustion products into the room where the boiler is installed; this requirement is satisfied if
36、the disposal system incorporates a water trap; a water trap has a seal of at least 25 mm at the maximum pressure in the combustion chamber at the maximum flue length specified by the manufacturer. Surfaces in contact with condensates (except purpose provided drains, water traps and siphons) shall be
37、 designed to prevent condensate retention. 4.3 Control of the combustion products temperature If the combustion products circuit contains materials that are likely to be affected by heat or is intended to be connected to a flue (including seals) that is likely to be affected by heat from the combust
38、ion products, the boiler shall incorporate a device to prevent the combustion products temperature exceeding the maximum allowable working temperature for the material as declared by the manufacturer. Page 4 EN 677:1998 BSI 1998 The device for limiting the combustion products temperature shall be no
39、n-adjustable and shall not be accessible without tools. If the flue gas system is not supplied with the appliance, the device for limiting the combustion products temperature may be supplied as an option to be fitted by the installer. Mounting of the device shall be well defined. 4.4 Chemical compos
40、ition of the condensate If the manufacturer states the chemical composition of the condensate it shall be checked at the end of the test of 6.3. 5 Operational requirements 5.1 General In addition to the boilers standards EN 297, prEN 483 and EN 625 the following requirements apply as appropriate. 5.
41、2 Verification of the nominal condensing output If the manufacturer states the nominal condensing output it is verified under the test conditions of 6.2. 5.3 Formation of condensate When the boiler is installed in accordance with the test conditions for efficiency measurement under 6.6.1, under the
42、conditions of 6.3 condensate shall only form at the points intended for this purpose and shall be readily drained. Condensate shall not find its way to parts of the boiler which are not intended for formation, collection and discharge of condensate, nor may the condensate cause any nuisance to the o
43、peration, the boiler and the surroundings. 5.4 Temperature of combustion products If the boiler incorporates a device to limit the maximum temperature of combustion products, under the conditions of 6.4, the temperature of the combustion products shall not exceed the maximum allowable working temper
44、ature for the materials of the combustion circuit and the flue materials, specified by the boiler manufacturer. Operation of the device shall cause non-volatile lock-out of the boiler. 5.5 Combustion 5.5.1 Normal conditions The combustion requirements are those specified in the boiler standards. The
45、 still air tests shall also be carried out when the boiler is operating in the condensing mode (508C/30 8C). 5.5.2 Special conditions Blockage of the condensate drain(s) or switching off the pump for the discharge of the condensate shall not lead to concentrations of CO in the combustion products 0,
46、2 % before shut-down or lock-out occurs. There shall be no spillage of condensate from the boiler. 5.6 Efficiencies 5.6.1 Useful efficiency Under the test conditions specified in 6.6.1, the useful efficiency at the nominal heat input (or the maximum heat input and at the arithmetic mean of the maxim
47、um and the minimum heat input for range rated boilers), shall be at least: 91 +10log P (in per cent) where: P is the nominal output. For range rated boilers, P is the maximum output as well as the arithmetic mean of the maximum and the minimum heat output as stated by the manufacturer, expressed in
48、kilowatts (kW). 5.6.2 Useful efficiency at part load Under the test conditions specified in 6.6.2, the useful efficiency at 30 % of the nominal heat input, (or the arithmetic mean of the maximum and the minimum heat input for range rated boilers) shall be at least: 97 +10log P (in per cent) where: P
49、 is the nominal output. For range rated boilers, P is the arithmetic mean of the maximum and the minimum heat output as stated by the manufacturer, expressed in kilowatts (kW). 6 Test methods 6.1 General All the tests are carried out under the conditions laid down in the boiler standards, unless otherwise stated. If the actual test conditions differ from the reference conditions (20 8C, 70 % relative humidity, 1 013,25 mbar) and/or the return water temperature differs from the specified value, the correction formu