Gas-fired instantaneous water heaters for the production of domestic hot water

This European Standard defines the specifications and test methods concerning the construction, safety, rational use of energy and fitness for purpose, and also the classification and marking of gas-fired instantaneous water heaters for sanitary uses, hereafter called “water heaters”.
This European Standard applies to water heaters:
-   of types AAS, B11, B11BS, B12, B12BS, B13, B13BS, B14, B22, B23, B32, B33, B44, B52, B53, C11, C12, C13, C21, C22, C23, C32, C33, C42, C43, C52, C53, C62, C63, C72, C73, C82and C83 according to CEN/TR 1749;
-   fitted with atmospheric burners;
-   equipped with atmospheric burners assisted by a fan for the supply of combustion air or evacuation of combustion products or fully premix burners;
-   using one or more combustible gases corresponding to the three gas families and at the pressures stated in accordance to EN 437;
-   of nominal heat input not exceeding 70 kW;
-   with an ignition burner or with direct ignition of the main burner.
In this European Standard, the heat inputs are expressed in relation to the net calorific value (Hi).
This European Standard does not contain all the requirements necessary for:
-   boiling water appliances;
-   appliances intended to be connected to a mechanical means of evacuating the combustion products;
-   appliances which fulfil a dual role of space heating and heating water for sanitary use;
-   appliances making use of the heat of condensation of the water contained in the combustion products;
-   water heaters of types B21, B31, B41, B42, B43 and B51.
This European Standard only covers water heaters where the fan, if any, is an integral part of the appliance.
This European Standard:
-   does not apply to appliances not intended to be connected to a flue when they are not fitted with an atmosphere sensing device;
-   takes account of the information given in Technical Report CEN/CR 1472:1994 with respect to marking.
Type B appliances should be with a combustion products discharge safety device to comply with essential requirement 3.4.3 of the Gas Appliances Directive 2009/142/EC. In this European Standard, the appliance is identified as type B11BS.
Appliances intended to be installed outdoors or in a room separate from inhabited rooms and provided with appropriate ventilation are not required to have this combustion products discharge safety device but, in this case, appropriate warnings on the packaging, and in the instructions should clearly define the limited authorized use for this type of appliance. In this European Standard, the appliance is identified as type B11.
The main symbols used in this European Standard are summarized in Annex F.

Gasbeheizte Durchlauf-Wasserheizer für den sanitären Gebrauch

Diese Europäische Norm legt die Anforderungen und die Prüfverfahren hinsichtlich der Konstruktion, der Sicherheit, des wirtschaftlichen Energieeinsatzes und der Gebrauchsgüte sowie die Einteilung und die Kennzeichnung von gasbeheizten Durchlauf-Wasserheizern für den sanitären Bereich fest, nachfolgend Wasserheizer genannt.
Diese Europäische Norm gilt für Wasserheizer:
-   der Bauarten AAS, B11, B11BS, B12, B12BS, B13, B13BS, B14, B22, B23, B32, B33, B44, B52, B53, C11, C12, C13, C21, C22, C23, C32, C33, C42, C43, C52, C53, C62, C63, C72, C73, C82 und C83 entsprechend CEN TR 1749;
-   mit atmosphärischen Brennern;
-   mit atmosphärischen Brennern mit Verbrennungsluft- oder Abgasgebläse oder mit Vormischbrennern;
-   die in Übereinstimmung mit der EN 437 ein oder mehrere Gase der drei Gasfamilien und die angegebenen Drücke verwenden;
-   mit einer Nennwärmebelastung bis 70 kW;
-   mit Zündbrenner oder direkter Zündung des Hauptbrenners.
In dieser Europäischen Norm werden die Wärmebelastungen auf den Heizwert (Hi) bezogen.
Diese Europäische Norm umfasst nicht alle notwendigen Anforderungen für:
-   Kochwassergeräte;
-   Geräte, die für den Anschluss an eine mechanische Abführung der Abgase vorgesehen sind;
-   Geräte, die eine Doppelfunktion von Raumheizern und Warmwasserbereitung für den sanitären Gebrauch erfüllen;
-   Geräte, die die Kondensationswärme der Abgase nutzen;
-   Wasserheizer der Bauarten B21, B31, B41, B42, B43 und B51.
Diese Europäische Norm behandelt nur Wasserheizer, bei denen, falls vorhanden, das Gebläse ein integraler Bestandteil des Gerätes ist.
Diese Europäische Norm:
-   gilt nicht für Geräte, die nicht für den Anschluss an eine Abgasleitung vorgesehen sind, wenn sie nicht mit einer Raumluftüberwachungseinrichtung ausgerüstet sind;
-   berücksichtigt die Informationen des Technischen Berichtes CR 1472:1994 in Bezug auf die Kennzeichnung;
Die wesentlichen Symbole, die in dieser Europäischen Norm angewendet werden, sind in Anhang F zusammengefasst.
fasst.

Appareils de production instantanée d'eau chaude pour usages sanitaires utilisant les combustibles gazeux

La présente norme européenne définit les spécifications et les méthodes d'essai relatives à la construction, la sécurité, l’utilisation rationnelle de l'énergie et l’aptitude à la fonction ainsi que la catégorie et le marquage des appareils de production instantanée d’eau chaude pour usages sanitaires utilisant les combustibles gazeux, désignés ci-après «chauffe-eau».
La présente norme européenne s’applique aux chauffe-eau :
-   de type AAS, B11, B11BS, B12, B12BS, B13, B13BS, B14, B22, B23, B32, B33, B44, B52, B53, C11, C12, C13, C21, C22, C23, C32, C33, C42, C43, C52, C53, C62, C63, C72, C73, C82 et C83 selon le CEN/TR 1749 ;
-   équipés de brûleurs atmosphériques ;
-   équipés de brûleurs atmosphériques assistés d’un ventilateur pour l’arrivée d’air  de combustion ou l'évacuation des produits de combustion ou de brûleurs à prémélange total ;
-   utilisant un ou plusieurs combustibles gazeux correspondant aux trois familles de gaz et aux pressions indiquées conformément à l’EN 437 ;
-   de débit calorifique nominal inférieur à 70 kW ;
-   avec brûleur d'allumage ou à allumage direct du brûleur principal.
Dans la présente Norme européenne, les débits calorifiques sont exprimés par rapport au pouvoir calorifique inférieur (Hi).
La présente norme européenne ne contient pas toutes les exigences nécessaires pour :
-   les appareils à eau bouillante ;
-   les appareils destinés à être connectés à des moyens mécaniques d’évacuation des produits de combustion ;
-   les appareils qui remplissent une double fonction de chauffage des locaux et de production d’eau chaude sanitaire ;
-   les appareils utilisant la chaleur de condensation de l'eau contenue dans les produits de combustion ;
-   les appareils des types B21, B31, B41, B42, B43 et B51.
La présente norme couvre uniquement les appareils où le ventilateur, le cas échéant, fait partie intégrante de l'appareil.
La présente Norme européenne :
-   ne s’applique pas aux appareils non destinés à être connectés à une cheminée lorsqu’ils ne sont pas équipés d’un dispositif de contrôle de viciation de l’atmosphère ;
-   tient compte des informations fournies dans le rapport technique CR 1472:1994 relatif au marquage.
Les principaux symboles usités dans la présente Norme européenne sont récapitulés dans l’Annexe F.

Pretočni plinski grelniki vode za pripravo sanitarne tople vode

General Information

Status
Published
Publication Date
12-May-2015
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
13-May-2015
Completion Date
13-May-2015

RELATIONS

Buy Standard

Standard
EN 26:2015
English language
168 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Gasbeheizte Durchlauf-Wasserheizer für den sänitären GebrauchAppareils de production instantanée d'eau chaude pour usages sanitaires utilisant les combustibles gazeuxGas-fired instantaneous water heaters for the production of domestic hot water97.100.20Plinski grelnikiGas heaters91.140.65Oprema za ogrevanje vodeWater heating equipmentICS:Ta slovenski standard je istoveten z:EN 26:2015SIST EN 26:2015en,fr,de01-julij-2015SIST EN 26:2015SLOVENSKI

STANDARDSIST EN 26:2004/A2:2004SIST EN 26:2004/A3:2007SIST EN 26:2004SIST EN 26:2004/A1:20041DGRPHãþD

SIST EN 26:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 26
May 2015 ICS 91.140.10 Supersedes EN 26:1997English Version
Gas-fired instantaneous water heaters for the production of domestic hot water

Appareils de production instantanée d'eau chaude pour usages sanitaires utilisant les combustibles gazeux

Gasbeheizte Durchlauf-Wasserheizer für den sanitären Gebrauch This European Standard was approved by CEN on 29 November 2014.

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 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 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 CEN-CENELEC Management Centre has the same status as the official 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, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 26:2015 ESIST EN 26:2015

EN 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 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 requirements ............................................................................................................. 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 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 Manual 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 AAS appliances ..................................................................... 42 5.2.10 Combustion products discharge safety device for type B11BS, B12BS and B13BS appliances ........ 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 installed 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 SIST EN 26:2015

EN 26:2015 (E) 3 5.4.3 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 ............................................................................................................................ 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 Nominal 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 it 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 AAS and B1 except for B14 ....................................... 63 6.7.3 Supplementary tests for type C11 appliances and outdoors and/or partially protected appliances ............................................................................................................................................ 64 6.7.4 Supplementary tests for type C2 appliances .................................................................................... 65 6.7.5 Supplementary tests for appliances of types C12, C13, C32, C33, B4 and B5 .................................... 66 6.7.6 Supplementary tests for type C42 and type C43 appliances ............................................................. 66 6.7.7 Supplementary tests for type C52 and type C53 appliances ............................................................. 67 6.7.8 Supplementary tests for type C6 appliances .................................................................................... 67 6.7.9 Supplementary tests for type C72 and type C73 appliances ............................................................. 67 6.7.10 Supplementary tests for type C82 and type C83 appliances ............................................................. 67 6.7.11 Functioning of a permanent ignition burner 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 C42 and C43 water heaters .............................................................. 72 6.7.14 Protection against the accumulation of gas in the combustion circuit ......................................... 72 6.7.15 Leakage of combustion products from type C7 water heaters ...................................................... 73 6.7.16 Supplementary tests for type B14, B2 and B3 water 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 ......................................................................................................................................... 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 SIST EN 26:2015

EN 26:2015 (E) 4 6.8.10 Atmosphere sensing device for type AAS appliances ..................................................................... 82 6.8.11 Combustion products discharge safety device of type B11BS appliances .................................... 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 protection 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 measurements ........................................................................................................ 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 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 8.2.5 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 elastomeric 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 8.4.6 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 opening time (TIA) ............................................................................................................... 110 8.5.5 Automatic water-operated gas valve .............................................................................................. 111 SIST EN 26:2015

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 9.1.2 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 Installation instructions .................................................................................................................... 132 9.2.2 User's instructions ............................................................................................................................ 137 9.2.3 Conversion instructions ................................................................................................................... 138 9.3 Presentation ....................................................................................................................................... 138 10 Ecodesign Data .................................................................................................................................. 138 10.1 Wawh) ............................................................................................. 138 10.2 Nitrogen oxides emissions ............................................................................................................... 138 10.3 Additional product information ........................................................................................................ 139 11 Energy Labelling Data ....................................................................................................................... 139 11.1 General ............................................................................................................................................... 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 documen

...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.