Gas-fired heating boilers - Part 1: General requirements and tests

This European Standard specifies the common requirements and test methods, as well as the classification, marking and energy labelling of gas-fired central heating boilers that are fitted with atmospheric burners, fan assisted atmospheric burners or fully premixed burners, and are hereafter referred to as “boilers”.
This European Standard is to be used in conjunction with the specific Parts 2 (Part 2-1 and following ones).
This European Standard applies to boilers of types B and C.
NOTE For further background information on appliance types see CEN/TR 1749:2014 [1].
a) that use one or more combustible gases of the three gas families at the pressures stated in EN 437;
b) where the temperature of the water is below or above 105 °C during normal operation;
c) where the maximum operating pressure in the water circuit does not exceed 6 bar;
d) which can give rise to condensation under certain circumstances;
e) which are declared in the instructions for installation to be either a "condensing" boiler or a "low temperature boiler" or a "standard boiler" or an "other boiler". If no declaration is given the boiler is to be considered both a "standard boiler" and an "other boiler";
NOTE The Ecodesign Directive defines "other boilers", "low temperature boilers" and "condensing boilers". The Boiler Efficiency Directive defines "standard boilers", "low temperature boilers" and "condensing boilers". Depending on the legislation applied, a boiler can be both "a standard boiler" and an "other boiler"."
f) which are intended to be installed inside a building or in a partially protected place;
g) which are intended to produce also hot water either by the instantaneous or storage principle as a single unit.
This European Standard applies to boilers designed for sealed water systems or for open water systems.
NOTE This general standard and the specific standards (see Part 2) provide requirements for boilers with known constructions. For boilers with any alternative constructions, which might not fully be covered by this standard or a specific standard, the risk associated with this alternative construction will need to be assessed.
An example of an assessment methodology, based upon risk assessment, is given in Clause 11.
This European Standard is not intended to cover appliances intended for connection to gas grids where the quality of the distributed gas is likely to vary to a large extent over the lifetime of the appliance (see Annex EE).
This European Standard is not intended to cover appliances designed and constructed to burn gas containing toxic components.

Heizkessel fur gasförmige Brennstoffe - Teil 1: Allgemeine Anforderungen und Prüfungen

Dieses Dokument legt die allgemeinen Anforderungen und Prüfmethoden sowie die Klassifizierung, Kennzeichnung und Energiekennzeichnung" von Heizkesseln fest, die mit atmosphärischen Brennern mit oder ohne Ventilator oder mit Vormischbrenner ausgerüstet sind und nachfolgend kurz „Kessel“ genannt werden.
Dieses Dokument ist in Verbindung mit den Teilen 2 (Teil 2-1 und folgende) anzuwenden.
Dieses Dokument gilt für Kessel der Bauart B und C:
ANMERKUNG Für weitere Hintergrundinformationen zu Gerätearten siehe CEN/TR 1749:2014 [1].
a) die mit einem oder mehreren brennbaren Gasen der drei Gasfamilien mit den in EN 437 genannten Drücken betrieben werden;
b) bei denen die Temperatur des Wassers unter normalen Betriebsbedingungen 105 °C nicht überschreitet;
c) deren maximaler wasserseitiger Betriebsdruck 6 bar nicht überschreitet;
d) bei denen sich unter bestimmten Bedingungen Kondenswasser bildet;
e) die in der Installationsanleitung entweder als „Brennwertkessel“ oder als „Niedertemperaturkessel“ oder als „Standardkessel“ oder als „andere Kessel“ bezeichnet werden. Wenn keine Angabe gemacht wird, wird der Kessel sowohl als „Standardkessel“ als auch als „anderer Kessel“ betrachtet;“
ANMERKUNG Die Verordnung für umweltgerechte Gestaltung definiert „andere Kessel“, „Niedertemperaturkessel“ und „Brennwertkessel“. Die Wirkungsgradrichtlinie (en: Boiler Efficiency Directive) definiert „Standardkessel“, „Niedertemperaturkessel“ und „Brennwertkessel“. Basierend auf der angewendeten Gesetzgebung kann ein Kessel sowohl ein „Standardkessel“ als auch ein „anderer Kessel“ sein.
f) die dafür vorgesehen sind, im Gebäude oder an einer teilweise geschützten Stelle aufgestellt zu werden;
g) die dafür vorgesehen sind, nach dem Durchlaufprinzip oder nach dem Speicherprinzip auch Warmwasser herzustellen, wobei das Ganze als eine Einheit vertrieben wird.
Dieses Dokument ist für Kessel anwendbar, die für geschlossene oder offene Wassersysteme ausgelegt sind.
ANMERKUNG Diese allgemeine Norm und die speziellen Normen (siehe Teil 2) beschreiben die Anforderungen für Kessel mit bekannter Bauweise. Für Kessel mit alternativer Bauweise, die eventuell nicht vollständig durch diese oder eine spezielle Norm abgedeckt werden, bedarf das Risiko, das mit dieser alternativen Bauweise verbunden ist, einer Abschätzung.
Ein Beispiel für eine auf einer Risikoanalyse beruhenden Bewertungsmethode wird in Abschnitt 11 beschrieben.
Dieses Dokument ist nicht für Geräte zum Anschluss an Gasversorgungsnetze bestimmt, bei denen die Qualität des verteilten Gases wahrscheinlich über die Lebensdauer des Geräts stark variiert (siehe Anhang EE).
Dieses Dokument behandelt nicht alle Anforderungen für:
a) Geräte über 1 000 kW;
b) Geräte, die für die Verbrennung von Gas ausgelegt und konstruiert sind, das Kohlenmonoxid und andere giftige Komponenten enthält.

Chaudières de chauffage central utilisant les combustibles gazeux - Partie 1: Exigences générales et essais

Le présent document spécifie les exigences et les méthodes d’essai communes, ainsi que la classification, le marquage et l’étiquetage énergétique concernant les chaudières de chauffage central utilisant les combustibles gazeux et équipées de brûleurs atmosphériques, de brûleurs atmosphériques assistés d’un ventilateur ou de brûleurs à prémélange total, ci-après dénommées « chaudières ».
Le présent document est à utiliser conjointement avec les Parties 2 spécifiques (Partie 2-1, Partie 2-2 et suivantes).
Le présent document s’applique aux chaudières des types B et C :
NOTE   Pour de plus amples informations sur la structure des types d’appareils, voir EN 1749:2020.
a)   utilisant un ou plusieurs combustibles gazeux appartenant aux trois familles de gaz et aux pressions indiquées dans l’EN 437:2021 ;
b)   dont la température de l’eau ne dépasse pas 105 °C en fonctionnement normal ;
c)   dont la pression maximale de service dans le circuit d’eau ne dépasse pas 6 bar ;
d)   pouvant condenser dans certaines circonstances ;
e)   déclarées dans la notice d’installation comme étant « chaudière à condensation » ou « chaudière à basse température » ou « chaudière standard » ou « autre chaudière ». En l’absence d’information, la chaudière doit être considérée comme une « chaudière standard » ou une « autre chaudière » ;
f)   destinées à être installées dans un bâtiment ou à un emplacement partiellement protégé ;
g)   destinées à produire aussi instantanément de l’eau chaude ou capables de la stocker, sous forme monobloc.
Le présent document s’applique aux chaudières à circuit d’eau fermé ou ouvert.
NOTE   La présente norme et les normes spécifiques (voir Parties 2) fournissent des exigences relatives aux chaudières dont la construction est connue. Pour les chaudières de construction différente susceptibles de ne pas être couvertes par la présente norme ou une norme spécifique, le risque associé à cette construction différente doit être évalué.
L’Article 11 donne un exemple de méthodologie d’évaluation basée sur l’évaluation des risques.
Le présent document ne s’applique pas aux appareils destinés à être raccordés au réseau de gaz lorsque la qualité du gaz distribué peut varier de façon importante pendant la durée de vie de l’appareil (voir Annexe AB).
Le présent document ne couvre pas toutes les exigences pour :
aa)   les appareils d’une puissance supérieure à 1 000 kW ;
ab)   les appareils conçus et construits pour brûler un gaz contenant du monoxyde de carbone ou d’autres composants toxiques ;
ac)   les appareils équipés d’un dispositif de chauffage d’appoint.

Plinski kotli za ogrevanje - 1. del: Splošne zahteve in preskusi

Ta evropski standard določa splošne zahteve in preskusne metode ter klasifikacijo, označevanje in energetsko označevanje plinskih kotlov za centralno ogrevanje z nameščenimi atmosferskimi gorilniki, atmosferskimi gorilniki z ventilatorjem ali gorilniki s popolnim vnaprejšnjim mešanjem (v nadaljevanju: »kotli«).
Ta evropski standard je treba uporabljati v povezavi s posebnimi 2. deli (del 2-1 in naslednji deli).
Ta evropski standard se uporablja za kotle tipov B in C:
OPOMBA: Za dodatne informacije o tipih kotlov glej standard CEN/TR 1749:2014 [1].
a) ki uporabljajo enega ali več gorljivih plinov iz treh družin plinov pri tlakih, navedenih v standardu EN 437;
b) pri katerih temperatura vode pri običajnem delovanju ne presega 105 °C;
c) pri katerih najvišji obratovalni tlak v vodnem omrežju ne presega 6 barov;
d) ki lahko pod določenimi pogoji povzročijo kondenzacijo;
e) ki so v navodilih za namestitev deklarirani kot »kondenzacijski kotli« ali »nizkotemperaturni kotli« ali »standardni kotli« ali »drugi kotli«; Če ni navedene deklaracije, se kotel šteje za »standardni kotel« in »drug kotel«.
OPOMBA: Direktiva o okoljsko primerni zasnovi opredeljuje »druge kotle«, »nizkotemperaturne kotle« in »kondenzacijske kotle«. OPOMBA: Direktiva o učinkovitosti kotlov opredeljuje »standardne kotle«, »nizkotemperaturne kotle« in »kondenzacijske kotle«. Glede na uporabljeno zakonodajo je kotel lahko »standardni kotel« in »drug kotel«.
f) ki so namenjeni vgradnji v zgradbi ali delno zaščitenem prostoru;
g) ki so namenjeni ogrevanju vode po načelu pretočnosti ali načelu shranjevanja.
Ta evropski standard se uporablja za kotle za zaprte ali odprte vodne sisteme.
OPOMBA: Ta splošni standard in posebni standardi (glej 2. del) določajo zahteve za kotle z znanimi konstrukcijami. V zvezi s kotli z drugačnimi konstrukcijami, ki morda niso v celoti zajeti v tem standardu ali posebnem standardu, je treba oceniti tveganje, povezano z drugačno konstrukcijo.
Primer metodologije ocenjevanja, ki temelji na oceni tveganja, je naveden v točki 11.
Ta evropski standard ni namenjen obravnavi aparatov za povezavo s plinskimi omrežji, v katerih bo kakovost distribuiranega plina med življenjsko dobo aparata verjetno znatno nihala (glej dodatek EE).
Ta evropski standard ni namenjen obravnavi aparatov, zasnovanih in izdelanih za zgorevanje plina, ki vsebuje strupene sestavine.

General Information

Status
Published
Public Enquiry End Date
02-Dec-2019
Publication Date
14-Mar-2022
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
11-Mar-2022
Due Date
16-May-2022
Completion Date
15-Mar-2022

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SLOVENSKI STANDARD
SIST EN 15502-1:2022
01-april-2022
Nadomešča:
SIST EN 15502-1:2012+A1:2015
Plinski kotli za ogrevanje - 1. del: Splošne zahteve in preskusi
Gas-fired heating boilers - Part 1: General requirements and tests
Heizkessel fur gasförmige Brennstoffe - Teil 1: Allgemeine Anforderungen und
Prüfungen

Chaudières de chauffage central utilisant les combustibles gazeux - Partie 1: Exigences

générales et essais
Ta slovenski standard je istoveten z: EN 15502-1:2021
ICS:
27.060.30 Grelniki vode in prenosniki Boilers and heat exchangers
toplote
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
97.100.20 Plinski grelniki Gas heaters
SIST EN 15502-1:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 15502-1:2022
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SIST EN 15502-1:2022
EN 15502-1
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2021
EUROPÄISCHE NORM
ICS 27.060.30; 91.140.10 Supersedes EN 15502-1:2012+A1:2015
English Version
Gas-fired heating boilers - Part 1: General requirements
and tests

Chaudières de chauffage central utilisant les Heizkessel für gasförmige Brennstoffe - Teil 1:

combustibles gazeux - Partie 1: Exigences générales et Allgemeine Anforderungen und Prüfungen

essais
This European Standard was approved by CEN on 25 July 2021.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15502-1:2021 E

worldwide for CEN national Members.
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SIST EN 15502-1:2022
EN 15502-1:2021 (E)
Contents Page

European foreword ......................................................................................................................................... 9

Introduction ................................................................................................................................................... 11

1 Scope ......................................................................................................................................................... 12

2 Normative references ......................................................................................................................... 13

3 Terms, definitions and symbols...................................................................................................... 15

4 Classification .......................................................................................................................................... 36

4.1 Gases and categories ....................................................................................................................... 36

4.2 Mode of air supply and evacuation of the combustion products .................................... 36

4.3 Maximum water-side operating pressure ............................................................................... 36

5 Construction .......................................................................................................................................... 36

5.1 General ................................................................................................................................................. 36

5.1.1 General requirements .................................................................................................................. 36

5.1.2 General verfication ........................................................................................................................ 37

5.2 Conversion to different gases ....................................................................................................... 37

5.3 Materials .............................................................................................................................................. 37

5.3.1 General ............................................................................................................................................... 37

5.3.2 Materials and thicknesses of walls or tubes with water side operating pressure for boilers

of pressure class-3 ....................................................................................................................................... 38

5.3.3 Domestic water connections ...................................................................................................... 39

5.3.4 Thermal Insulation ........................................................................................................................ 39

5.3.5 Materials in contact with water for human consumption ............................................... 39

5.3.6 Durability against corrosion of metallic combustion product circuits ....................... 40

5.4 Method of construction .................................................................................................................. 41

5.4.1 Design ................................................................................................................................................. 41

5.4.2 Checking the state of operation ................................................................................................. 42

5.4.3 Use and servicing ............................................................................................................................ 42

5.4.4 Connections to the gas and water pipes ................................................................................. 43

5.4.5 Soundness ......................................................................................................................................... 43

5.4.6 Supply of combustion air and evacuation of the combustion products ..................... 44

5.4.7 Dampers ............................................................................................................................................. 44

5.4.8 Air proving ........................................................................................................................................ 44

5.4.9 Gas/air ratio controls ................................................................................................................... 45

5.4.10 Fan ....................................................................................................................................................... 46

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5.4.11 Drainage ............................................................................................................................................. 46

5.4.12 Operational safety in the event of failure of the auxiliary energy ................................ 46

5.4.13 Special provision for Low Temperature Boilers and Condensing Boilers ................. 46

5.5 Burners ................................................................................................................................................. 47

5.6 Pressure test points ......................................................................................................................... 48

5.7 Requirements for the application of control and safety devices ..................................... 48

5.7.1 General................................................................................................................................................ 48

5.7.2 Adjusters and range-rating devices ......................................................................................... 48

5.7.3 Gas circuit .......................................................................................................................................... 49

5.7.4 Gas pressure regulator ................................................................................................................. 50

5.7.5 Ignition devices................................................................................................................................ 51

5.7.6 Flame supervision devices .......................................................................................................... 51

5.7.7 Gas/air ratio control tubes .......................................................................................................... 52

5.7.8 Thermostats and water flow temperature limiting devices ........................................... 52

5.7.9 Remote control ................................................................................................................................ 53

5.7.10 Expansion vessel and pressure gauge ..................................................................................... 54

5.7.11 Protection against frost for boilers intended to be installed in a partially protected place

54

5.7.12 Adjusting, control and safety devices for the domestic hot water circuit .................. 55

6 Electrical and electromagnetic safety ........................................................................................... 55

7 Controls .................................................................................................................................................... 55

7.1 General .................................................................................................................................................. 55

7.2 Detailed specifications .................................................................................................................... 56

7.2.1 Control and safety devices ........................................................................................................... 56

7.2.2 Valves used in boilers .................................................................................................................... 56

7.2.3 Not relevant aspects for controls tested in combination with the boiler ................... 56

7.2.4 Relevant aspects for controls tested in combination with the boiler .......................... 57

7.3 Thermostats and flow temperature limiting devices .......................................................... 57

7.3.1 General................................................................................................................................................ 57

7.3.2 Construction requirements ......................................................................................................... 58

7.3.3 Performance ..................................................................................................................................... 59

8 Operational requirements ................................................................................................................ 61

8.1 General .................................................................................................................................................. 61

8.1.1 Characteristics of the reference and limit gases ................................................................. 61

8.1.2 General test conditions ................................................................................................................. 62

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EN 15502-1:2021 (E)

8.2 Soundness ........................................................................................................................................... 66

8.2.1 Soundness of the gas circuit ....................................................................................................... 66

8.2.2 Soundness of the combustion circuit ...................................................................................... 67

8.2.3 Soundness of the water circuit .................................................................................................. 67

8.2.4 Soundness of the domestic water circuit ............................................................................... 68

8.3 Hydraulic resistance ........................................................................................................................ 68

8.3.1 Requirements .................................................................................................................................. 68

8.3.2 Test conditions ................................................................................................................................ 68

8.4 Heat inputs and heat output ......................................................................................................... 69

8.4.1 Determination of the nominal heat input or the maximum and minimum heat input 69

8.4.2 Adjustment of the heat input by the downstream gas pressure ................................... 71

8.4.3 Ignition rate ...................................................................................................................................... 71

8.4.4 Nominal output ............................................................................................................................... 71

8.4.5 Verification of the nominal condensing output ................................................................... 71

8.4.6 Nominal domestic hot water heat input ................................................................................. 72

8.4.7 Water pressure to obtain the nominal heat input for instantaneous combination boilers

72

8.4.8 Obtaining the domestic hot water temperature for instantaneous combination boilers

72

8.4.9 Heating-up time of the domestic hot water .......................................................................... 73

8.5 Limiting temperatures.................................................................................................................... 73

8.5.1 General ............................................................................................................................................... 73

8.5.2 Limiting temperatures of the adjusting, control and safety devices ........................... 73

8.5.3 Limiting temperatures of the side walls, the front and the top ..................................... 74

8.5.4 Limiting temperature of the test panels and the floor ...................................................... 74

8.6 Ignition, cross lighting, flame stability ..................................................................................... 75

8.6.1 General ............................................................................................................................................... 75

8.6.2 Limit conditions .............................................................................................................................. 75

8.6.3 Special flue conditions .................................................................................................................. 76

8.6.4 Reduction of the gas rate of the ignition burner ................................................................. 77

8.7 Reduction of the gas pressure ...................................................................................................... 77

8.7.1 Requirements .................................................................................................................................. 77

8.7.2 Test conditions ................................................................................................................................ 77

8.8 Defective closure of the gas valve immediately upstream of the main burner .......... 77

8.8.1 Requirements .................................................................................................................................. 77

8.8.2 Test conditions ................................................................................................................................ 78

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8.9 Pre-purge ............................................................................................................................................. 78

8.10 Functioning of a permanent ignition burner when the fan stops during the standby time

78

8.10.1 Requirements ................................................................................................................................... 78

8.10.2 Test conditions ................................................................................................................................ 78

8.11 Adjustment, control and safety devices .................................................................................... 78

8.11.1 Requirement ..................................................................................................................................... 78

8.11.2 Test method for determining the operating temperature range .................................. 78

8.11.3 Combination Boilers ...................................................................................................................... 79

8.11.4 Control devices ................................................................................................................................ 82

8.11.5 Ignition devices................................................................................................................................ 82

8.11.6 Flame supervision device ............................................................................................................ 84

8.11.7 Gas pressure regulator ................................................................................................................. 87

8.11.8 Thermostats and flow temperature limiting devices ........................................................ 88

8.12 Carbon monoxide .............................................................................................................................. 90

8.12.1 General................................................................................................................................................ 90

8.12.2 Limit conditions............................................................................................................................... 92

8.12.3 Special conditions ........................................................................................................................... 92

8.12.4 Sooting ................................................................................................................................................ 93

8.12.5 Condensate discharge blockage test ........................................................................................ 94

8.13 NO .......................................................................................................................................................... 94

8.13.1 Requirement ..................................................................................................................................... 94

8.13.2 Test methods .................................................................................................................................... 95

8.13.3 Calculation of emissions of NO in mg/kWh based on GCV .............................................. 97

8.14 Special provisions for boilers intended to be installed in a partially protected place98

8.14.1 Frost protection system for boilers intended to be installed in a partially protected place

98

8.14.2 Protection against the ingress of rain ..................................................................................... 98

8.15 Formation of condensate ............................................................................................................... 98

8.15.1 Requirements ................................................................................................................................... 98

8.15.2 Test conditions ................................................................................................................................ 98

8.16 Temperature of combustion products ...................................................................................... 99

8.16.1 Requirements ................................................................................................................................... 99

8.16.2 Test conditions ................................................................................................................................ 99

8.17 Sound power level L ..................................................................................................................... 99

9 Useful efficiencies ................................................................................................................................. 99

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SIST EN 15502-1:2022
EN 15502-1:2021 (E)

9.1 General ................................................................................................................................................. 99

9.1.1 Correction of measured efficiency to reference conditions ............................................ 99

9.1.2 Use of the general test conditions ......................................................................................... 100

9.2 Useful efficiency at the nominal heat input.......................................................................... 100

9.2.1 Requirements ............................................................................................................................... 100

9.2.2 Tests ................................................................................................................................................. 100

9.3 Useful efficiency at part load ..................................................................................................... 102

9.3.1 Requirements ............................................................................................................................... 102

9.3.2 Tests ................................................................................................................................................. 102

9.4 Heat output, Seasonal energy efficiency and energy consumption ............................. 109

9.4.1 Rated heat output (P and P ) ........................................................................................... 109

rated 4

9.4.2 Useful heat output at 30% of rated heat output and low-temperature regime (P )109

9.4.3 Useful efficiency (GCV) at rated heat output and high-temperature regime (η ) 109

9.4.4 Useful efficiency (GCV) at 30% of rated heat output and low-temperature regime (η )

110

9.4.5 Ignition burner power consumption (GCV) (P ) ............................................................ 110

ign

9.4.6 Calculation of the seasonal space heating energy efficiency (η ) ............................... 110

9.4.7 Calculation of the annual energy consumption for space heating (Q ) (GCV) ..... 112

9.4.8 Water heating energy efficiency and energy consumption of combination boilers for water

heating mode............................................................................................................................................... 112

10 Electric auxiliary energy ................................................................................................................ 113

10.1 Auxiliary energy consumption ................................................................................................. 113

10.1.1 General ............................................................................................................................................ 113

10.1.2 System boundaries ...................................................................................................................... 113

10.1.3 Auxiliary energy at nominal heat input .............................................................................. 113

10.1.4 Auxiliary energy at part load .................................................................................................. 114

10.1.5 Auxiliary energy at stand-by ................................................................................................... 114

10.2 Auxiliary electricity consumption measurements required for eco-design and labelling

regulations ................................................................................................................................................... 114

10.2.1 General ............................................................................................................................................ 114

10.2.2 System boundaries ...................................................................................................................... 114

10.2.3 Auxiliary electricity consumption [kW] at nominal heat input .................................. 115

10.2.4 Auxiliary electricity consumption at part load [kW] ...................................................... 115

10.2.5 Auxiliary electricity consumption at stand by [kW] ....................................................... 115

11 Risk assessment................................................................................................................................. 115

12 Marking and instructions ............................................................................................................... 116

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EN 15502-1:2021 (E)

12.1 Boiler marking ................................................................................................................................ 116

12.1.1 Data plate ........................................................................................................................................ 116

12.1.2 Markings related to the state of adjustment ...................................................................... 117

12.1.3 Packaging ........................................................................................................................................ 117

12.1.4 Warnings notices on the boiler and the packaging ......................................................... 117

12.1.5 Other information ........................................................................................................................ 118

12.2 Instructions ...................................................................................................................................... 119

12.2.1 Instructions for installation ..................................................................................................... 119

12.2.2 Instructions for use and servicing ......................................................................................... 124

12.2.3 Conversion instructions ............................................................................................................ 124

12.3 Presentation .................................................................................................................................... 125

Annex A (normative) Properties of carbon and stainless steels ............................................. 133

Annex B (normative) Minimum requirements for cast iron ..................................................... 134

Annex C (normative) Parts in aluminium and aluminium alloys ............................................ 135

Annex D (normative) Parts in copper or copper alloys .............................................................. 136

Annex E (normative) Minimum thicknesses for rolled parts ................................................... 137

Annex F (normative) Nominal minimum thicknesses of boiler sections of cast materials under

water pressure ............................................................................................................................................ 138

Annex G (normative) Parameters for welded joints and welding processes ...................... 139

Annex H (informative) Examples of the composition of the gas circuit according to 5.7.3.2144

Annex I (informative) Compilation of the test conditions for the various gas families .. 153

Annex J (normative) Calculation of conversions of NOx ............................................................. 155

Annex K (inf
...

SLOVENSKI STANDARD
oSIST prEN 15502-1:2019
01-november-2019
Plinski kotli za gretje - 1. del: Splošne zahteve in preskusi
Gas-fired heating boilers - Part 1: General requirements and tests

Heizkessel fur gasförmige Brennstoffe - Teil 1: Allgemeine Anforderungen und Prüfungen

Chaudières de chauffage central utilisant les combustibles gazeux - Partie 1: Exigences

générales et essais
Ta slovenski standard je istoveten z: prEN 15502-1
ICS:
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
97.100.20 Plinski grelniki Gas heaters
oSIST prEN 15502-1:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 15502-1:2019
DRAFT
EUROPEAN STANDARD
prEN 15502-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2019
ICS 27.060.30; 91.140.10 Will supersede EN 15502-1:2012+A1:2015
English Version
Gas-fired heating boilers - Part 1: General requirements
and tests

Chaudières de chauffage central utilisant les Heizkessel fur gasförmige Brennstoffe - Teil 1:

combustibles gazeux - Partie 1: Exigences générales et Allgemeine Anforderungen und PrÃ1/4fungen

essais

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 109.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15502-1:2019 E

worldwide for CEN national Members.
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Contents Page

European foreword ....................................................................................................................................................... 9

Introduction ................................................................................................................................................................. 11

1 Scope ....................................................................................................................................................................... 11

2 Normative references ....................................................................................................................................... 12

3 Terms, definitions and symbols.................................................................................................................... 14

3.1 Terms and definitions ................................................................................................................................... 14

3.2 Symbols .............................................................................................................................................................. 33

4 Classification ........................................................................................................................................................ 35

4.1 Gases and categories ..................................................................................................................................... 35

4.2 Mode of air supply and evacuation of the combustion products .................................................. 35

4.3 Maximum water-side operating pressure ............................................................................................. 35

5 Construction ........................................................................................................................................................ 35

5.1 General ............................................................................................................................................................... 35

5.2 Conversion to different gases ..................................................................................................................... 36

5.3 Materials ............................................................................................................................................................ 36

5.3.1 General ............................................................................................................................................................. 36

5.3.2 Materials and thicknesses of walls or tubes with water side operating pressure for boilers

of pressure class-3 ..................................................................................................................................................... 36

5.3.3 Domestic water connections .................................................................................................................... 37

5.3.4 Thermal Insulation ...................................................................................................................................... 38

5.3.5 Materials in contact with water for human consumption ............................................................. 38

5.3.6 Durability against corrosion of metallic combustion product circuits ..................................... 39

5.4 Method of construction ................................................................................................................................ 40

5.4.1 Design ............................................................................................................................................................... 40

5.4.2 Checking the state of operation ............................................................................................................... 40

5.4.3 Use and servicing .......................................................................................................................................... 41

5.4.4 Connections to the gas and water pipes ............................................................................................... 41

5.4.5 Soundness ....................................................................................................................................................... 42

5.4.6 Supply of combustion air and evacuation of the combustion products ................................... 43

5.4.7 Dampers ........................................................................................................................................................... 43

5.4.8 Air proving ...................................................................................................................................................... 43

5.4.9 Gas/air ratio controls ................................................................................................................................. 44

5.4.10 Fan ..................................................................................................................................................................... 44

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5.4.11 Drainage ........................................................................................................................................................... 44

5.4.12 Operational safety in the event of failure of the auxiliary energy .............................................. 44

5.4.13 Special provision for Low Temperature Boilers and Condensing Boilers ............................... 45

5.5 Burners ............................................................................................................................................................... 46

5.6 Pressure test points ....................................................................................................................................... 46

5.7 Requirements for the application of control and safety devices ................................................... 47

5.7.1 General.............................................................................................................................................................. 47

5.7.2 Adjusters and range-rating devices ....................................................................................................... 47

5.7.3 Gas circuit ........................................................................................................................................................ 48

5.7.4 Gas pressure regulator ............................................................................................................................... 49

5.7.5 Ignition devices.............................................................................................................................................. 49

5.7.6 Flame supervision devices ........................................................................................................................ 50

5.7.7 Gas/air ratio control tubes ........................................................................................................................ 51

5.7.8 Thermostats and flow temperature limiting devices ...................................................................... 51

5.7.9 Remote control .............................................................................................................................................. 52

5.7.10 Expansion vessel and pressure gauge ................................................................................................... 53

5.7.11 Protection against frost for boilers intended to be installed in a partially protected

place 53

5.7.12 Adjusting, control and safety devices for the domestic hot water circuit ................................ 54

6 Electrical and electromagentic safety ......................................................................................................... 54

7 Controls .................................................................................................................................................................. 54

7.1 General ................................................................................................................................................................ 54

7.2 Detailed specifications .................................................................................................................................. 54

7.3 Thermostats and flow temperature limiting devices ........................................................................ 56

7.3.1 General.............................................................................................................................................................. 56

7.3.2 Construction requirements ....................................................................................................................... 56

7.3.3 Performance ................................................................................................................................................... 57

8 Operational requirements .............................................................................................................................. 59

8.1 General ................................................................................................................................................................ 59

8.1.1 Characteristics of the reference and limit gases ............................................................................... 59

8.1.2 General test conditions ............................................................................................................................... 60

8.2 Soundness .......................................................................................................................................................... 64

8.2.1 Soundness of the gas circuit ...................................................................................................................... 64

8.2.2 Soundness of the combustion circuit ..................................................................................................... 65

8.2.3 Soundness of the water circuit ................................................................................................................. 65

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8.2.4 Soundness of the domestic water circuit ............................................................................................. 66

8.3 Hydraulic resistance ...................................................................................................................................... 66

8.3.1 Requirements ................................................................................................................................................ 66

8.3.2 Test conditions .............................................................................................................................................. 66

8.4 Heat inputs and heat output ....................................................................................................................... 67

8.4.1 Determination of the nominal heat input or the maximum and minimum heat input ....... 67

8.4.2 Adjustment of the heat input by the downstream gas pressure ................................................. 69

8.4.3 Ignition rate .................................................................................................................................................... 69

8.4.4 Nominal output ............................................................................................................................................. 69

8.4.5 Verification of the nominal condensing output ................................................................................. 69

8.4.6 Nominal domestic hot water heat input ............................................................................................... 70

8.4.7 Water pressure to obtain the nominal heat input for instantaneous combination

boilers ............................................................................................................................................................................. 70

8.4.8 Obtaining the domestic hot water temperature for instantaneous combination boilers.. 70

8.4.9 Heating-up time of the domestic hot water ........................................................................................ 70

8.5 Limiting temperatures.................................................................................................................................. 71

8.5.1 General ............................................................................................................................................................. 71

8.5.2 Limiting temperatures of the adjusting, control and safety devices ......................................... 71

8.5.3 Limiting temperatures of the side walls, the front and the top ................................................... 72

8.5.4 Limiting temperature of the test panels and the floor .................................................................... 72

8.6 Ignition, cross lighting, flame stability ................................................................................................... 73

8.6.1 General ............................................................................................................................................................. 73

8.6.2 Limit conditions ............................................................................................................................................ 73

8.6.3 Special flue conditions ................................................................................................................................ 74

8.6.4 Reduction of the gas rate of the ignition burner ............................................................................... 74

8.7 Reduction of the gas pressure .................................................................................................................... 75

8.7.1 Requirements ................................................................................................................................................ 75

8.7.2 Test conditions .............................................................................................................................................. 75

8.8 Defective closure of the gas valve immediately upstream of the main burner ........................ 75

8.8.1 Requirements ................................................................................................................................................ 75

8.8.2 Test conditions .............................................................................................................................................. 75

8.9 Pre-purge ........................................................................................................................................................... 76

8.10 Functioning of a permanent ignition burner when the fan stops during the standby time 76

8.10.1 Requirements ................................................................................................................................................ 76

8.10.2 Test conditions .............................................................................................................................................. 76

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8.11 Adjustment, control and safety devices .................................................................................................. 76

8.11.1 Requirement ................................................................................................................................................... 76

8.11.2 Test method for determining the operating temperature range ................................................ 76

8.11.3 Combination Boilers .................................................................................................................................... 77

8.11.4 Control devices .............................................................................................................................................. 79

8.11.5 Ignition devices.............................................................................................................................................. 80

8.11.6 Flame supervision device .......................................................................................................................... 81

8.11.7 Gas pressure regulator ............................................................................................................................... 84

8.11.8 Thermostats and flow temperature limiting devices ...................................................................... 85

8.12 Carbon monoxide ............................................................................................................................................ 88

8.12.1 General.............................................................................................................................................................. 88

8.12.2 Limit conditions............................................................................................................................................. 89

8.12.3 Special conditions ......................................................................................................................................... 90

8.12.4 Sooting .............................................................................................................................................................. 91

8.12.5 Condensate discharge blockage test ...................................................................................................... 91

8.13 NO ........................................................................................................................................................................ 92

8.13.1 Requirement ................................................................................................................................................... 92

8.13.2 Test methods .................................................................................................................................................. 92

8.13.3 Calculation of emissions of NO in mg/kWh based on GCV ............................................................ 95

8.14 Special provisions for boilers intended to be installed in a partially protected place .......... 95

8.14.1 Frost protection system for boilers intended to be installed in a partially protected

place 95

8.14.2 Protection against the ingress of rain ................................................................................................... 96

8.15 Formation of condensate ............................................................................................................................. 96

8.15.1 Requirements ................................................................................................................................................. 96

8.15.2 Test conditions .............................................................................................................................................. 96

8.16 Temperature of combustion products .................................................................................................... 96

8.16.1 Requirements ................................................................................................................................................. 96

8.16.2 Test conditions .............................................................................................................................................. 96

8.17 Sound power level LWA ................................................................................................................................ 97

9 Useful efficiencies ............................................................................................................................................... 97

9.1 General ................................................................................................................................................................ 97

9.1.1 Use of correction formulae ........................................................................................................................ 97

9.1.2 Use of the general test conditions ........................................................................................................... 97

9.1.3 Declaration of the efficiency type of the boiler .................................................................................. 97

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9.2 Useful efficiency at the nominal heat input........................................................................................... 97

9.2.1 Requirements ................................................................................................................................................ 97

9.2.2 Tests .................................................................................................................................................................. 98

9.3 Useful efficiency at part load ...................................................................................................................... 99

9.3.1 Requirements ................................................................................................................................................ 99

9.3.2 Tests ................................................................................................................................................................ 100

9.4 Losses of combination boilers ................................................................................................................. 106

9.4.1 Requirements for losses of combination boilers ............................................................................ 106

9.4.2 Test of losses of combination boilers .................................................................................................. 106

9.5 Compliance with the eco-design regulation for efficiency ............................................................ 108

9.5.1 Calculations for seasonal space heating energy efficiency on gross calorific value

(GCV) 108

9.5.2 Calculation of the seasonal space heating energy efficiency ...................................................... 110

9.5.3 Calculation of the water heating energy efficiency (η ) for combined heaters ................ 111

9.6 Compliance with the Labelling delegated regulation for efficiency ........................................... 111

9.6.1 Calculation of the reference annualenergy consumption of space heating .......................... 111

9.6.2 Calculation of the water heating energy efficiency (η ) for combined heaters ................ 111

9.6.3 Annual Fuel consumption of water heating (AFC) .......................................................................... 111

9.6.4 Annual electricity consumption (AEC) ................................................................................................ 111

9.6.5 Daily fuel consumption (Q ) ................................................................................................................ 111

fuel

9.6.6 Daily electricity consumption (Q ) ................................................................................................... 111

elec

10 Electric auxiliary energy ............................................................................................................................... 112

10.1 Auxiliary energy consumption ................................................................................................................ 112

10.1.1 General ........................................................................................................................................................... 112

10.1.2 System boundaries ..................................................................................................................................... 112

10.1.3 Auxiliary energy at nominal heat input ............................................................................................. 112

10.1.4 Auxiliary energy at part load ................................................................................................................. 113

10.1.5 Auxiliary energy at stand-by .................................................................................................................. 113

10.2 Auxiliary electricity consumption measurements required for eco-design and labelling

regulations .................................................................................................................................................................. 113

10.2.1 General ........................................................................................................................................................... 113

10.2.2 System boundaries ..................................................................................................................................... 113

10.2.3 Auxiliary electricity consumption [kW] at nominal heat input ................................................. 114

10.2.4 Auxiliary electricity consumption at part load [kW] ..................................................................... 114

10.2.5 Auxiliary electricity consumption at stand by [kW] ...................................................................... 114

11 Risk assessment................................................................................................................................................ 114

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12 Marking and instructions ...............................
...

Questions, Comments and Discussion

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