1、August 2015 Translation by DIN-Sprachendienst.English price group 35No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、 91.140.65This standard has been included in the body of DVGW Technical Rules.!%E;“2342924www.din.deDDIN EN 26Gas-fired instantaneous water heaters for the production of domestichot water;English version EN 26:2015,English translation of DIN EN 26:2015-08Gasbeheizte Durchlauf-Wasserheizer fr den san
3、itren Gebrauch;Englische Fassung EN 26:2015,Englische bersetzung von DIN EN 26:2015-08Appareils de production instantane deau chaude pour usages sanitaires utilisant lescombustibles gazeux;Version anglaise EN 26:2015,Traduction anglaise de DIN EN 26:2015-08SupersedesDIN EN 26:2007-06www.beuth.deIn c
4、ase of doubt, the German-language original shall be considered authoritative.Document comprises 170 pages 07.15 DIN EN 26:2015-08 2 A comma is used as the decimal marker. National foreword This standard includes safety requirements. This document (EN 26:2015) has been prepared by Technical Committee
5、 CEN/TC 48 “Domestic gas-fired water heaters” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the DIN-Normenausschuss Gastechnik (DIN Standards Committee Gas Technology). This standard has been included in the body of technical rules and standards for gas is
6、sued by the DVGW Deutscher Verein des Gas- und Wasserfaches e.V. (German Technical and Scientific Association for Gas and Water). Amendments This standard differs from DIN EN 26:2007-06 as follows: a) specific requirements for condensing water heaters have been included; b) additional tests have bee
7、n included for water heaters installed in a partially protected place; c) requirements for NOxmeasurement have been included; d) requirements for plastic, elastomeric seals and elastomeric sealants in the combustion product evacuation ducts, terminals and fitting pieces have been added (Subclauses 8
8、.3 and 8.4); e) Annex A “National situations” has been updated; f) the standard has been aligned with DIN EN 437:2009-09; g) marking requirements have been updated while taking CEN/CR 1472 into account; h) Annex ZB “Relationship between this European Standard and the requirements of Commission Regul
9、ation (EU) No 814/2013” (Ecodesign requirements) has been added; i) Annex ZC “Relationship between this European Standard and the requirements of Commission Delegated Regulation (EU) No 812/2013” (Energy labelling requirements) has been added. Previous editions DIN 3368: 1940-07, 1956-01 DIN 3369: 1
10、956-03 DIN 3368-10: 1962-12 DIN 3368-1: 1966-09 DIN EN 26: 1977-02, 1981-01, 1999-02, 2001-06, 2007-06 DIN EN 26/A2: 2006-06 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 26 May 2015 ICS 91.140.10 Supersedes EN 26:1997English Version Gas-fired instantaneous water heaters for the production of
11、 domestic hot water Appareils de production instantane deau chaude pour usages sanitaires utilisant les combustibles gazeux Gasbeheizte Durchlauf-Wasserheizer fr den sanitren Gebrauch This European Standard was approved by CEN on 29 November 2014. CEN members are bound to comply with the CEN/CENELEC
12、 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 CEN-CENELEC Management Centre or t
13、o 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 CEN-CENELEC Management Centre has the same status as the offici
14、al versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, N
15、orway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of ex
16、ploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 26:2015 EEN 26:2015 (E) 2 Contents Page Foreword 7 1 Scope 9 2 Normative references 9 3 Terms and definitions 12 4 Classification of water heaters 25 4.1 General . 25 4.2 Classification of gases . 25 4.3
17、 Appliance categories 26 4.4 Mode of supply of the combustion air and evacuation of the combustion products (appliance types). 26 4.5 Water pressure 26 4.5.1 General . 26 4.5.2 Low pressure appliances . 26 4.5.3 Normal pressure appliances 26 4.5.4 High pressure appliances 26 5 Constructional require
18、ments . 26 5.1 Conversion to different gases . 26 5.1.1 Introduction . 26 5.1.2 General . 26 5.1.3 Materials 27 5.1.4 Design - Assembly - Strength 29 5.1.5 Accessibility - Ease of maintenance - Fitting and removal 30 5.1.6 Gas connections . 30 5.1.7 Means of achieving soundness . 30 5.1.8 Supply of
19、combustion air and evacuation of the combustion products 31 5.1.9 Checking the state of operation 35 5.1.10 Drainage . 35 5.1.11 Electrical safety. 35 5.1.12 Operational safety in the event of failure of the auxiliary energy 37 5.2 Adjusting, control and safety devices 37 5.2.1 General . 37 5.2.2 Ma
20、nual shut off valves and/or gas rate adjusters . 38 5.2.3 Preset gas rate adjusters . 38 5.2.4 Gas pressure regulator 39 5.2.5 Pressure test points . 39 5.2.6 Automatic water-operated gas valve 39 5.2.7 Ignition devices . 39 5.2.8 Flame supervision device 41 5.2.9 Atmosphere sensing device for type
21、AASappliances . 42 5.2.10 Combustion products discharge safety device for type B11BS, B12BSand B13BSappliances 42 5.2.11 Protection against accidental overheating of thermostatic appliances . 43 5.2.12 Composition of the gas circuit 43 5.2.13 Protection against frost for appliances intended to be in
22、stalled in a partially protected place . 43 5.2.14 Protection against the ingress of rain 44 5.3 Main burner . 44 5.4 Supplementary requirements for condensing water heaters 44 5.4.1 Materials in contact with condensate . 44 5.4.2 Discharge of condensate . 44 DIN EN 26:2015-08 EN 26:2015 (E) 3 5.4.3
23、 Control of the combustion products temperature . 45 5.4.4 Chemical composition of the condensate 45 6 Operational requirements . 45 6.1 General . 45 6.1.1 Introduction 45 6.1.2 Characteristics of the test gases . 45 6.1.3 Requirements for preparation of the test gases 45 6.1.4 Choice of test gases
24、45 6.1.5 Test pressures . 45 6.1.6 General test conditions . 46 6.2 Soundness . 50 6.2.1 Soundness of the gas circuit . 50 6.2.2 Soundness of the combustion circuit and evacuation of the combustion products . 51 6.2.3 Soundness of the water circuit 56 6.3 Heat inputs . 56 6.3.1 General . 56 6.3.2 No
25、minal heat input 58 6.3.3 Minimum heat input . 59 6.4 Temperature of the control knobs . 59 6.4.1 Requirements . 59 6.4.2 Test . 59 6.5 Temperature of the adjustering, control and safety devices 60 6.5.1 Requirement . 60 6.5.2 Test . 60 6.6 Temperature of the appliance casing, the surface on which i
26、t is installed and adjacent surfaces and external temperature of the ducts 60 6.6.1 Requirements . 60 6.6.2 Tests . 61 6.7 Ignition - Cross-lighting - Flame stability 61 6.7.1 Operation in still air for all appliances 61 6.7.2 Supplementary tests for appliances of types AASand B1except for B14. 63 6
27、.7.3 Supplementary tests for type C11appliances and outdoors and/or partially protected appliances 64 6.7.4 Supplementary tests for type C2appliances 65 6.7.5 Supplementary tests for appliances of types C12, C13, C32, C33, B4and B566 6.7.6 Supplementary tests for type C42and type C43appliances . 66
28、6.7.7 Supplementary tests for type C52and type C53appliances . 67 6.7.8 Supplementary tests for type C6appliances 67 6.7.9 Supplementary tests for type C72and type C73appliances . 67 6.7.10 Supplementary tests for type C82and type C83appliances . 67 6.7.11 Functioning of a permanent ignition burner
29、when the fan stops during the standby time . 68 6.7.12 Air proving device for fan assisted water heaters . 68 6.7.13 Functioning of the fan of types C42and C43water heaters 72 6.7.14 Protection against the accumulation of gas in the combustion circuit . 72 6.7.15 Leakage of combustion products from
30、type C7water heaters 73 6.7.16 Supplementary tests for type B14, B2and B3water heaters 74 6.8 Adjusting, control and safety devices . 74 6.8.1 General . 74 6.8.2 Control devices 74 6.8.3 Closing mechanisms and the automatic water operated gas valve 75 6.8.4 Ignition devices . 76 6.8.5 Safety times .
31、 77 6.8.6 Pressure regulator . 80 6.8.7 Adjustment of the water rate - Maximum water temperature (all appliances) 81 6.8.8 Overheating of the water 81 6.8.9 Effectiveness of the protection against accidental overheating of thermostatic appliances . 81 DIN EN 26:2015-08 EN 26:2015 (E) 4 6.8.10 Atmosp
32、here sensing device for type AASappliances . 82 6.8.11 Combustion products discharge safety device of type B11BSappliances 84 6.9 Combustion . 86 6.9.1 Requirements 86 6.9.2 Test . 86 6.9.3 Nitrogen oxides emissions 91 6.10 Soot deposition . 93 6.10.1 Requirement 93 6.10.2 Test . 93 6.11 Frost prote
33、ction system for appliances intended to be installed in a partially protected place . 93 6.12 Protection against ingress of rain . 93 6.13 Supplementary tests for condensing water heaters . 94 6.13.1 Formation of condensate . 94 6.13.2 Temperature of combustion products 94 6.14 Electrical power meas
34、urements 95 6.14.1 General . 95 6.14.2 Nominal and minimal conditions 95 6.14.3 Standby 95 6.15 Measurement of standby heat losses . 95 7 Rational use of energy . 95 7.1 General . 95 7.2 Heat input of ignition burners . 95 7.2.1 Requirement 95 7.2.2 Test . 95 7.3 Efficiency . 96 7.3.1 Requirement 96
35、 7.3.2 Test . 96 8 Fitness for purpose 97 8.1 General . 97 8.2 Constructional characteristics 97 8.2.1 Water connections 97 8.2.2 Preset water rate adjuster 97 8.2.3 Temperature selector and summer-winter switch . 97 8.2.4 Designation and measurement of reference temperatures of flue systems 97 8.2.
36、5 Mechanical resistance and stability of ducts, terminal and fitting pieces 98 8.3 Requirements for plastic in the combustion product evacuation ducts, terminals and fitting pieces for appliances 100 8.3.1 Thermal resistance . 100 8.3.2 Materials 100 8.4 Requirements for elastomeric seals and elasto
37、meric sealants in the combustion product evacuation ducts, terminals and fitting pieces 105 8.4.1 Characterization 105 8.4.2 Long-term resistance to thermal load 106 8.4.3 Long-term resistance to condensate exposure . 107 8.4.4 Cyclic condensate resistance test 108 8.4.5 Relaxation behaviour . 108 8
38、.4.6 Compression set . 109 8.4.7 Low temperature resistance 109 8.4.8 Joints in elastomeric seals 109 8.5 Operational characteristics . 110 8.5.1 Minimum heat input 110 8.5.2 Nominal and minimum useful outputs . 110 8.5.3 Ignition of permanent ignition burners by a spark generator 110 8.5.4 Ignition
39、 opening time (TIA) . 110 8.5.5 Automatic water-operated gas valve 111 DIN EN 26:2015-08 EN 26:2015 (E) 5 8.5.6 Adjustment of the water rate - Water temperature . 112 8.5.7 Heating-up time . 116 8.5.8 Specific rate . 117 9 Marking and instructions 129 9.1 Appliance marking 129 9.1.1 Data plate 129 9
40、.1.2 Supplementary markings 130 9.1.3 Supplementary marking and instructions in the case of water heaters to be installed in partially protected places . 131 9.1.4 Packaging . 131 9.1.5 Warnings on the appliance and the packaging 131 9.1.6 Other information 132 9.2 Instructions 132 9.2.1 Installatio
41、n instructions 132 9.2.2 Users instructions 137 9.2.3 Conversion instructions . 138 9.3 Presentation . 138 10 Ecodesign Data 138 10.1 Water heating energy efficiency (wh) . 138 10.2 Nitrogen oxides emissions . 138 10.3 Additional product information 139 11 Energy Labelling Data . 139 11.1 General .
42、139 11.2 Printed label . 139 11.2.1 General . 139 11.2.2 Annual Electricity Consumption (AEC) . 139 11.2.3 Annual Fuel Consumption (AFC) . 139 11.2.4 Sound power level (LWA) . 139 11.3 Product fiche 140 11.4 Technical documentation . 140 Annex A (informative) National situations 141 Annex B (normati
43、ve) Test apparatus for type C1,C3,B4and B5water heaters (see 6.7.3.2) 144 Annex C (normative) Test apparatus for type C21appliances (see 6.7.4.2) 149 Annex D (normative) Description of the sealed room for the tests of type AASappliances (see 6.8.10.1.2.1) 150 Annex E (informative) Soundness of the g
44、as circuit test - Volumetric method (see 6.1.6.5 and 6.2.1.3). 151 Annex F (informative) Principal symbols and abbreviations used 152 Annex G (informative) Guidelines for extension to other categories 153 Annex H (informative) A deviations . 154 Annex I (normative) Lists of materials currently used
45、155 Annex J (normative) Test methods to determine the effects of to long-term thermal load, long-term condensate exposure, condensing/ non-condensing cycling and resistance to UV radiation 157 Annex K (informative) NOx conversion calculation 158 Annex L (normative) Parts in copper or copper alloys .
46、 159 Annex M (informative) Compilation of the test conditions for the various gas families . 160 DIN EN 26:2015-08 EN 26:2015 (E) 6 Annex N (informative) Alternative Method for the determination of the nominal heat input or the maximum and minimum heat input (according to 6.3.1) for appliances using
47、 a pneumatic gas/air ratio control system . 162 Annex ZA (informative) Relationship between this European Standard and the requirements of EU Directive 2009/142/EC . 163 Annex ZB (informative) Relationship between this European Standard and the requirements of Commission Regulation (EU) No 814/2013
48、166 Annex ZC (informative) Relationship between this European Standard and the requirements of Commission Delegated Regulation (EU) No 812/2013 167 Bibliography . 168 DIN EN 26:2015-08 EN 26:2015 (E) 7 Foreword This document (EN 26:2015) has been prepared by Technical Committee CEN/TC 48 “Domestic gas-fired water heaters”, the secretariat of which is held by AFNOR. 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 November 2015 and conflicting nation
