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1、EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 26:1997/A3 October 2006 ICS 91.140.65 English Version Gas-fired instantaneous water heaters for the production of domestic hot water, fitted with atmospheric burners Appareils de production instantane deau chaude pour usages sanitaires quips de br
2、leurs atmosphriques utilisant les combustibles gazeux Gasbeheizte Durchlauf-Wasserheizer fr den sanitren Gebrauch mit atmosphrischen Brennern This amendment A3 modifies the European Standard EN 26:1997; it was approved by CEN on 4 September 2006. CEN members are bound to comply with the CEN/CENELEC
3、Internal Regulations which stipulate the conditions for inclusion of this amendment into the relevant national standard 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 m
4、ember. This amendment 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 the official versions. CEN members are
5、the national standards bodies of Austria, Belgium, Cyprus, 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 Un
6、ited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 26:1997/A
7、3:2006: E -,-,- EN 26:1997/A3:2006 (E) 2 Foreword This document (EN 26:1997/A3:2006) has been prepared by Technical Committee CEN/TC 48 “Domestic gas-fired water heaters”, the secretariat of which is held by AFNOR. This Amendment to the European Standard EN 26:1997 shall be given the status of a nat
8、ional standard, either by publication of an identical text or by endorsement, at the latest by April 2007, and conflicting national standards shall be withdrawn at the latest by April 2007. This amendment includes requirements relative to the metallic, plastic and other non-metallic materials that a
9、re used in water heaters and which come into contact with water intended for human consumption. It is intended to ensure that products of this kind complying with these requirements meet current technological development and requirements which will result from the application of the EAS (European Ap
10、proval Scheme) of the European Commission, with regard to the service life of water heaters and their physiological suitability. NOTE As long as no European regulations are enforced (EAS) national regulations stay in force. According to the CEN/CENELEC Internal Regulations, the national standards or
11、ganizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
12、Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. -,-,- EN 26:1997/A3:2006 (E) 3 6.1.2 Materials Add a new subclause header “6.1.2.1 General”. Replace the last paragraph with the following text: “6.1.2.2 Metallic materials 6.1.2.2.1 Corrosion resistance Provided that the water heate
13、r is used in accordance with the manufacturers instructions: the functioning of components manufactured from corrosion-resistant metallic materials shall not be affected by corrosion within the expected service life of the water heater, and no special maintenance shall be required to keep the compon
14、ents in good working order. 6.1.2.2.2 Requirements Materials that come into contact with water intended for human consumption shall withstand the mechanical, chemical and thermal stresses to which they are exposed during the service life of the water heater and shall not contaminate the water suppli
15、ed. Metallic materials shall be corrosion-resistant. Metallic materials are considered to satisfy the requirements with respect to corrosion protection: if the material used is enamelled (one or more layers) and equipped with cathodic corrosion protection, or where types of stainless steel containin
16、g a minimum of 16 % chrome are used, or where they are assessed as acceptable to the national regulations in force. Examples for the selection of metallic materials (steel, copper and copper alloys) are given in P.2 and P.3. 6.1.2.3 Non-metallic materials 6.1.2.3.1 Plastic materials Due to the many
17、different types of plastic in components used in the drinking water sector, many different material properties need to be taken into consideration e.g. longitudinal expansion, joining and fixing techniques, temperature effects, effect of light (UV resistance), ageing, internal pressure, internal and
18、 external corrosion (for example as a result of using cleaning products) and also transport and storage conditions. 6.1.2.3.2 Requirements of plastic materials In the manufacture of water heaters and their components, only those plastic materials that meet mechanical, chemical and thermal demands as
19、 well as physiological and hygiene requirements throughout the life of the equipment shall be used in contact with water intended for human consumption. This means they shall be suitable for coming into direct contact with food and not pose any health threat. Special attention shall be paid to the m
20、icrobiological properties of the plastic materials used and to the prevention of substances leaching out. Examples for the selection of the plastic materials are given in P.4. -,-,- EN 26:1997/A3:2006 (E) 4 6.1.2.3.3 Other non-metallic operating and auxiliary materials These materials include rubber
21、, sealant, adhesives and also lubricants on moving parts that come into contact with the water intended for human consumption. These materials shall satisfy the physiological and hygiene requirements in force. Their use is to be limited to what is technically necessary.” -,-,- EN 26:1997/A3:2006 (E)
22、 5 Add the following Annex P: ANNEX P (informative) Examples of materials currently used P.1 General Materials in compliance with the requirements of the enforced national regulations (e.g. ACS, ATA, KTW, WRC, ) are deemed to satisfy the requirements of the present amendment. P.2 Special types of st
23、eel Table P.1 Special types of steel Material reference Abbreviation 1.4571 X6CrNiMoTi 17 12 2 1.4435 X2CrNiMo 18 14 3 1.4539 X2NiCrMoCu 25 20 5 1.4462 X2CrNiMoN 22 5 P.3 Copper and copper alloys Table P.2 Copper and copper alloys Material Material reference Abbreviation Copper 2.0090 SF-Cu Copper-N
24、ickel alloy 2.0872 CuNi10Fe1Mn Copper-Zinc alloys 2.0401 2.0402 2.0340.02 2.0340.05 2.0290.01 CuZn39Pb3 CuZn40Pb2 GK-CuZn37Pb GD-CuZn37Pb G-CuZn33Pb Copper-Tin-Zinc alloys 2.1096.01 G-CuSn5ZnPb Copper-Tin alloys 2.1020 CuSn6 -,-,- EN 26:1997/A3:2006 (E) 6 P.4 Plastic materials Table P.3 Plastic mate
25、rials Material Abbreviation Area of application Unplasticized polyvinylchloride High and medium-density polyethylene PVC-U PE-HD, PE-MD Cold water systems Cross-linked polyethylene Polybutylene Propylene copolymer (Polypropylene) Chlorinated polyvinylchloride PE-X PB PP-H, PP-R PVC-C Cold and hot wa
26、ter systems Composite pipes (plastic-metal-plastic) Various EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 26:1997/A2 June 2004 ICS 91.140.65 English version Gas-fired instantaneous water heaters for the production of domestic hot water, fitted with atmospheric burners Appareils de production
27、instantane deau chaude pour usages sanitaires quips de brleurs atmosphriques utilisant les combustibles gazeux Gasbeheizte Durchlauf-Wasserheizer fr den sanitren Gebrauch mit atmosphrischen Brennern This amendment A2 modifies the European Standard EN 26:1997; it was approved by CEN on 8 April 2004.
28、CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on a
29、pplication to the Central Secretariat or to any CEN member. This amendment 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 s
30、ame status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
31、 Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2004 CENAll rights of exploitation in any form and by any means reserved worldwide for
32、 CEN national Members. Ref. No. EN 26:1997/A2:2004: E EN 26:1997/A2:2004 (E) 2 Contents page Foreword.3 1 Scope .4 2 Normative references.4 3.7 combustion circuit4 3.7.5 terminal4 4.3 mode of supply of the combustion air and evacuation of the combustion products (appliance type).4 4.3.2 Type B4 5.1
33、Appliance marking5 5.1.4 Warnings on the appliance and the packaging.5 5.2 Instructions .6 5.2.1 Technical instructions6 6.1.7 Supply of combustion air and evacuation of the combustion products 6 6.2.10 Combustion products discharge safety device.7 7.2.1 Soundness of the gas circuit.7 7.7.2 Suppleme
34、ntary tests for appliances of types AAS and B11 and B11BS 9 7.7.5 Supplementary tests for appliances of types C12 C13 C32 and C3310 7.7.12 Air proving device for type C water heaters with fan10 7.7.16 Supplementary tests for type B14, B2 and B3 water heaters10 7.9 Combustion.11 7.9.1 Requirements11
35、Annex A (informative)12 Annex B (normative)13 Annex N (informative) Schematic representation of the classification of type B water heaters14 Annex ZA 19 EN 26:1997/A2:2004 (E) 3 Foreword This document (EN 26:1997/A2:2004) has been prepared by Technical Committee CEN/TC 48 “Domestic gas- fired water
36、heaters”, the secretariat of which is held by AFNOR. This Amendment to the European Standard EN 26:1997 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2004, and conflicting national standards shall be withdraw
37、n at the latest by December 2004. 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 EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an inte
38、gral part of this document. With this amendment, the requirements and test methods for type B instantaneous water heaters with fan assisted combustion are introduced in EN 26. In addition requirements and test procedures for resistance to freezing are introduced. According to the CEN/CENELEC Interna
39、l Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherla
40、nds, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. -,-,- EN 26:1997/A2:2004 (E) 4 1 Scope 2nd paragraph 1st dash, add : “B12, B12BS, B13, B13BS, B14, B22, B23, B32, B33 , B44, B52 and B53“ 2nd paragraph 1st dash, add the following footnote : “National i
41、nstallation regulations may specify further requirements and may limit the modes of installation permitted in the territory of a CEN member state.” 2nd paragraph 3rd dash, delete : “hereafter referred to as type C water heaters with a fan“. 4th paragraph, add the following indent : “water heaters of
42、 types B21, B31, B41, B42, B43 and B51;“ Add after the 4th paragraph : “This standard only covers water heaters where the fan, if any, is an integral part of the appliance.” 2 Normative references Add the following reference : “CR 1749 : 2001 European scheme for the classification of gas appliances
43、according to the method of evacuation of the products of combustion (Types).“ 3.7 combustion circuit Replace the last dash with the following : “the combustion products evacuation ducts and either the duct adapter (if any) or the connection to the terminal for type C, B4 and B5 water heaters.“ 3.7.5
44、 terminal Add after the 3rd indent : “ the combustion products evacuation duct for types B4 and B5 water heaters.“ 4.3 mode of supply of the combustion air and evacuation of the combustion products (appliance type) 4.3.2 Type B Add after the first paragraph the following text: “Type B water heaters
45、are classified into several types according to the mode of evacuation of the combustion products. The types are defined by two subscripts: a) The first subscript number is based upon the possible installation of the water heater with respect to the mode of air supply and evacuation of the combustion
46、 products. b) The second subscript number is based upon the presence and position of an integral fan in the water heater, as shown below : -,-,- EN 26:1997/A2:2004 (E) 5 A type B water heater intended to operate with a pressurised flue duct shall be identified by an extra subscript “P”. This subscri
47、pt “P” is only used when installation in accordance with the water heater manufacturers instructions on a flue specified by the water heater manufacturer results in the flue operating at a positive pressure2a).” Add at the end of the last paragraph of subclause 4.3.2 a new footnote 2a): “2a) This id
48、entification “P” is in accordance with the designation of the classes of tightness in positive pressure, agreed by CEN/TC 166: “Chimneys“, depending on the pressure of operation of the duct (e.g. see EN 1443)”. Add the following new subclauses : “4.3.2.2 type B2 A type B water heater without a draught diverter. 4.3.2.3 type B3 A type B water heater without a draught diverter, which is designed for connection to a common duct system. This common duct system consists of a single natural draught flue.