Gas-fired central heating boilers - Part 2-1: Specific standard for type C appliances and type B2, B3 and B5 appliances of a nominal heat input not exceeding 1 000 kW

EN 15502-1:2020, Clause 1 is replaced by the following:
This document specifies, the requirements and test methods concerning, as well as the classification and marking 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 document is to be used in conjunction with FprEN 15502-1:2020.
This document covers certain gas-fired central heating boilers from the types C1 up to C(11) and the types B2, B3 and B5:
NOTE 1   For further background information on appliance types see EN 1749:2020.
a)   that have a nominal heat input (on the basis of net calorific value) not exceeding 1 000 kW;
b)   that use one or more combustible gases of the three gas families at the pressures stated in EN 437:2018;
c)   where the temperature of the heat transfer fluid does not exceed 105 °C during normal operation;
d)   where the maximum operating pressure in the water circuit does not exceed 6 bar;
e)   which can give rise to condensation under certain circumstances;
f)   which are declared in the instructions for installation to be either a "condensing" boiler or a "low temperature boiler" or a "standard boiler"; if no declaration is given the boiler is to be considered a "standard boiler";
g)   which are intended to be installed inside a building or in a partially protected place;
h)   which are intended to produce also hot water either by the instantaneous or storage principle as a single unit;
i)   which are designed for either sealed water systems or for open water systems;
j)   which are either modular boilers, or non modular boilers.
k)   which are from the types C(10) that are equipped with a gas-air ratio control and that have a ∆pmax, saf(min) of 25 Pa, and C(11) that have condensing boiler modules that are equipped with a gas-air ratio control and that have a ∆pmax, saf(min) of 25 Pa.
NOTE 2   This document provides requirements for boilers with known constructions. For boilers with any alternative constructions, which might not fully be covered by this standard, the risk associated with this alternative construction needs to be assessed.
An example of an assessment methodology, based upon risk assessment, is given in Clause 11.
This document does not cover all the requirements for:
aa)   appliances above 1 000 kW;
ab)   appliances that are intended to be connected 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 AB);
ac)   appliances using flue dampers;
ad)   appliances of the types B21, B31, B51, C21, C41, C51, C61, C71, C81, C(12) and C(13);
ae)   C7 appliances that have a nominal heat input (on the basis of net calorific value) exceeding 70 kW;
af)   appliances incorporating flexible plastic flue liners;
ag)   C(10) boilers:
1)   without a gas-air ratio control, or
2)   which are non-condensing appliances, or
3)   which have a maximum safety pressure difference at minimum heat input not equal to 25 Pa (∆pmax, saf(min));
ah)   C(11) boilers that have boiler modules:
1)   without a gas-air ratio control, or
2)   which are non-condensing appliances, or
3)   which have a maximum safety pressure difference at minimum heat input not equal to 25 Pa (∆pmax, saf(min));
ai)   appliances intended to be connected to a  flue having mechanical extraction;
aj)   surface temperatures of external parts particular to children and elderly people;
ak)   appliances that are intended to burn natural gases of the second family where hydrogen is added to the natural gas;
al)   appliances equipped with an adaptive combustion control function (ACCF);
am)   boilers intended to be installed in areas accessible to elderly people and children.

Heizkessel für gasförmige Brennstoffe - Teil 2-1: Heizkessel der Bauart C und Heizkessel der Bauarten B2, B3 und B5 mit einer Nennwärmebelastung nicht größer als 1 000 kW

EN 15502-1:2020, Abschnitt 1, wird durch Folgendes ersetzt:
Dieses Dokument legt Anforderungen und Prüfmethoden sowie die Klassifizierung und Kennzeichnung von gasbefeuerten Heizkesseln fest, die mit atmosphärischen Brennern mit oder ohne Gebläse oder mit Vormischbrenner ausgerüstet sind und nachfolgend kurz "Kessel" genannt werden.
Dieses Dokument ist in Verbindung mit FprEN 15502-1:2020 zu verwenden.
Dieses Dokument schließt bestimmte gasbefeuerte Zentralheizungskessel der Bauarten C1 bis C11 und die Bauarten B2, B3 und B5 ein:
ANMERKUNG 1   Zu weiteren Hintergrundinformationen zu Gerätearten siehe EN 1749:2020.
a)   die eine Nennwärmebelastung (bezogen auf den Heizwert) von nicht mehr als 1 000 kW haben;
b)   die mit einem oder mehreren brennbaren Gasen der drei Gasfamilien mit den in EN 437:2018 genannten Drücken betrieben werden;
c)   bei denen die Temperatur der Wärme leitenden Flüssigkeit unter normalen Betriebsbedingungen 105 °C nicht überschreitet;
d)   deren maximaler wasserseitiger Betriebsdruck 6 bar nicht überschreitet;
e)   bei denen sich unter bestimmten Bedingungen Kondenswasser bilden kann;
f)   die in der Installationsanleitung entweder als "Brennwertgeräte", als "Niedertemperaturkessel" oder als "Standardkessel" bezeichnet werden. Wenn keine Angabe gemacht wird, wird der Kessel als "Standardkessel" betrachtet;
g)   die dafür vorgesehen sind, im Gebäude oder an einer teilweise geschützten Stelle aufgestellt zu werden;
h)   die dafür vorgesehen sind, nach dem Durchlaufprinzip oder nach dem Speicherprinzip auch Warmwasser als eine Einheit herzustellen;
i)   die entweder für geschlossene oder offene Wassersysteme ausgelegt sind;
j)   die entweder modulare oder nicht modulare Kessel sind.
k)   die von der Art C(10) sind, die mit einem Regel- und Steuergerät für das Gas-Luft-Druckverhältnis ausgestattet sind und ein ∆pmax, saf(min) von 25 Pa haben, sowie C(11) mit Brennwertkesselmodulen, ausgestattet mit einem Regel- und Steuergerät für das Gas-Luft-Druckverhältnis und mit einem ∆pmax, saf(min) von 25 Pa.
ANMERKUNG 2   Dieses Dokument gibt Anforderungen an Kessel mit bekannter Bauweise an. Für Kessel mit alternativer Bauweise, die eventuell nicht vollständig durch diese Norm abgedeckt werden, muss das Risiko, das mit dieser alternativen Bauweise verbunden ist, bewertet werden.
Ein Beispiel für ein Bewertungsverfahren, das auf einer Risikoanalyse beruht, wird in Abschnitt 11 beschrieben.
Dieses Dokument behandelt nicht alle Anforderungen an:
aa)   Geräte über 1 000 kW;
ab)   Geräte, die dafür ausgelegt sind, an ein Gasnetz angeschlossen zu werden, in dem die Qualität des verteilten Gases über die Lebensdauer des Gerätes wahrscheinlich stark schwankt (siehe Anhang AB);
ac)   Geräte, die Abgasklappen nutzen;
ad)   Geräte der Arten B21, B31, B51, C21, C41, C51, C61, C71, C81, C(12) und C(13);
ae)   C7-Geräte, die eine Nennwärmebelastung (auf Basis des Heizwertes) von 70 kW überschreiten;
af)   Geräte, die flexible Kunststoffabzüge beinhalten;
ag)   C(10)-Kessel:
1)   ohne Regel- und Steuergerät für das Gas-Luft-Druckverhältnis oder
2)   die keine Brennwertgeräte sind oder
3)   mit einer maximalen Sicherheitsdruckdifferenz bei minimaler Wärmebelastung nicht gleich 25 Pa (∆pmax, saf(min));
ah)   C(11)-Kessel mit Kesselmodulen:
1)   ohne Regel- und Steuergerät für das Gas-Luft-Druckverhältnis oder
2)   die keine Brennwertgeräte sind oder
3)   mit einer maximalen Sicherheitsdruckdifferenz bei minimaler Wärmebelastung nicht gleich 25 Pa (∆pmax, saf(min));
ai)   Geräte, die für den Anschluss an eine mechanische Abführung der Abgase vorgesehen sind;
aj)   Oberflächentemperaturen von Außenteilen, insbesondere für Kinder und ältere Menschen;
ak)   Geräte, die für die Verbrennung von Erdgas der zweiten Familie bestimmt sind, wenn dem Erdgas Wasserstoff zugesetzt wird;
al)   Geräte, die mit einer adaptiven Verbrennungsregelungsfunktion...

Chaudières de chauffage central utilisant les combustibles gazeux - Partie 2-1 : Norme spécifique pour les appareils de type C et les appareils de types B2, B3 et B5 dont le débit calorifique nominal est inférieur ou égal à 1 000 kW

L'Article 1 de l'EN 15502 1:2020 est remplacé par ce qui suit :
Le présent document spécifie les exigences et les méthodes d'essai, ainsi que la classification et le marquage des chaudières de chauffage central utilisant les combustibles gazeux et étant équipées
de brûleurs atmosphériques avec ventilateur ou de brûleurs à pré-mélange total, ci-après dénommées « chaudières ».
Le présent document est à utiliser conjointement avec la FprEN 15502-1:2020.
Le présent document s'applique aux chaudières de types C1 à C(11), et des types B2, B3 et B5 :
NOTE 1   Pour plus d'informations sur les types d'appareils, voir l'EN 1749:2020.
a)   de débit calorifique nominal (sur la base du pouvoir calorifique inférieur) inférieur à 1 000 kW ;
b)   utilisant un ou plusieurs combustibles gazeux appartenant aux trois familles de gaz et aux pressions indiquées dans l'EN 437:2018 ;
c)   dont la température du fluide caloporteur ne dépasse pas 105 °C en fonctionnement normal ;
d)   dont la pression maximale de fonctionnement dans le circuit d'eau ne dépasse pas 6 bar ;
e)   pouvant condenser dans certaines circonstances ;
f)   déclarées dans la notice d'installation comme étant « chaudière à condensation » ou « chaudière à basse température » ou « chaudière standard » par le fabricant ; en l'absence d'information la chaudière est considérée comme « chaudière standard » ;
g)   destinées à être installées dans un bâtiment ou à un emplacement partiellement protégé ;
h)   destinées à produire aussi instantanément de l'eau chaude ou capables de la stocker, sous forme de monobloc ;
i)   conçues pour un système avec circuit d'eau fermé ou ouvert ;
j)   modulaires ou non ;
k)   de type C(10) équipées d'un dispositif de contrôle du rapport air/gaz de ∆pmax, saf(min) de 25 Pa, et de type C(11) constituées de modules de chaudière à condensation équipées d'un dispositif de contrôle du ratio air/gaz de ∆pmax, saf(min) de 25 Pa.
NOTE 2   Le présent document fournit les exigences relatives aux chaudières dont la construction est connue. Pour les chaudières de construction différentes, susceptibles de ne pas être couvertes par la présente norme, 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 couvre pas toutes les exigences relatives :
aa)   aux appareils d'une puissance supérieure à 1 000 kW ;
ab)   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 l'Annexe AB) ;
ac)   aux appareils munis de registres ;
ad)   aux appareils des types B21, B31, B51, C21, C41, C51, C61, C71, C81, C(12) et C(13) ;
ae)   aux appareils de type C7 de débit calorifique nominal (basé sur le pouvoir calorifique inférieur) supérieur à 70 kW ;
af)   aux appareils utilisant un conduit flexible en plastique  pour l'évacuation des produits de combustion;
ag)   aux chaudières de type C(10) :
1)   non équipées de dispositif de régulation du rapport air/gaz, ou
2)   qui ne sont pas des chaudières à condensation, ou
3)   qui ont une différence de pression maximale de sécurité au débit calorifique minimal inférieure à 25 Pa (∆pmax, saf(min)) ;
ah)   aux chaudières de type C(11), avec des modules de chaudière :
1)   non équipées de dispositif de régulation du rapport air/gaz, ou
2)   qui ne sont pas des chaudières à condensation, ou
3)   qui ont une différence de pression maximale de sécurité au débit calorifique minimal inférieure à 25 Pa (∆pmax, saf(min)) ;
ai)   aux appareils destinés à être raccordés à un conduit d'évacuation des produits de combustion muni d'un dispositif d'extraction ;
aj)   aux températures de surface des surfaces extérieures, en particulier pour les enfants et les personnes âgées ;
ak)   ...

Plinski kotli za centralno ogrevanje - 2-1. del: Poseben standard za tip kotlov C in tipe kotlov B2, B3 in B5 z nazivno močjo do vključno 1000 kW

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Status
Not Published
Current Stage
4020 - Submission to enquiry - Enquiry
Due Date
05-Aug-2021
Completion Date
05-Aug-2021

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SLOVENSKI STANDARD
oSIST prEN 15502-2-1:2021
01-julij-2021

Plinski kotli za centralno ogrevanje - 2-1. del: Poseben standard za tip kotlov C in

tipe kotlov B2, B3 in B5 z nazivno močjo do vključno 1000 kW

Gas-fired central heating boilers - Part 2-1: Specific standard for type C appliances and

type B2, B3 and B5 appliances of a nominal heat input not exceeding 1 000 kW

Heizkessel für gasförmige Brennstoffe - Teil 2-1: Heizkessel der Bauart C und Heizkessel

der Bauarten B2, B3 und B5 mit einer Nennwärmebelastung nicht größer als 1 000 kW

Chaudières de chauffage central utilisant les combustibles gazeux - Partie 2-1 : Norme

spécifique pour les appareils de type C et les appareils de types B2, B3 et B5 dont le

débit calorifique nominal est inférieur ou égal à 1 000 kW
Ta slovenski standard je istoveten z: prEN 15502-2-1
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
oSIST prEN 15502-2-1:2021 en,fr,de

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

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oSIST prEN 15502-2-1:2021
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oSIST prEN 15502-2-1:2021
DRAFT
EUROPEAN STANDARD
prEN 15502-2-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2021
ICS 27.060.30; 91.140.10 Will supersede EN 15502-2-1:2012+A1:2016
English Version
Gas-fired central heating boilers - Part 2-1: Specific
standard for type C appliances and type B2, B3 and B5
appliances of a nominal heat input not exceeding 1 000 kW

Chaudières de chauffage central utilisant les Heizkessel für gasförmige Brennstoffe - Teil 2-1:

combustibles gazeux - Partie 2-1 : Norme spécifique Heizkessel der Bauart C und Heizkessel der Bauarten

pour les appareils de type C et les appareils de types B2, B3 und B5 mit einer Nennwärmebelastung nicht

B2, B3 et B5 dont le débit calorifique nominal est größer als 1 000 kW
inférieur ou égal à 1 000 kW

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

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15502-2-1:2021 E

worldwide for CEN national Members.
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oSIST prEN 15502-2-1:2021
prEN 15502-2-1:2021 (E)
Contents Page

European foreword ............................................................................................................................... 6

Introduction ...........................................................................................................................................10

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

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

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

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

3.2 Symbols .....................................................................................................................................15

4 Classification ...........................................................................................................................15

5 Construction ............................................................................................................................15

5.1 General ......................................................................................................................................15

5.2 Conversion to different gases ............................................................................................15

5.3 Materials ...................................................................................................................................15

5.4 Method of construction .......................................................................................................15

5.4.1 Design ........................................................................................................................................15

5.4.2 Checking the state of operation ........................................................................................15

5.4.3 Use and servicing ...................................................................................................................15

5.4.4 Connections to the gas and water pipes ........................................................................15

5.4.5 Soundness .................................................................................................................................15

5.4.6 Supply of combustion air and evacuation of the combustion products .............15

5.4.7 Dampers ....................................................................................................................................16

5.4.8 Air proving ...............................................................................................................................16

5.4.9 Gas/air ratio controls ...........................................................................................................17

5.4.10 Fan ...............................................................................................................................................17

5.4.11 Drainage ....................................................................................................................................17

5.4.12 Operational safety in the event of failure of the auxiliary energy .......................17

5.4.13 Special provision for Low Temperature Boilers and Condensing Boilers ........17

5.5 Burners ......................................................................................................................................17

5.6 Pressure test points ..............................................................................................................17

5.7 Requirements for the application of control and safety devices ..........................17

5.8 Additional requirements for modular boilers ............................................................17

6 Electrical safety ......................................................................................................................17

7 Controls .....................................................................................................................................17

8 Operational requirements .................................................................................................17

8.1 General ......................................................................................................................................17

8.1.1 Characteristics of the reference and limit gases ........................................................18

8.1.2 General test conditions ........................................................................................................18

8.1.2.1 Installation of the boiler .............................................................................................18

8.1.2.2 Gases used for testing ..................................................................................................19

8.1.2.3 Conduct of test to obtain a heat input ....................................................................19

8.1.2.4 Water circuit ...................................................................................................................19

8.1.2.5 Thermal equilibrium ...................................................................................................19

8.1.2.6 General test conditions for combination boilers ...............................................19

8.1.2.7 Electrical supply ............................................................................................................19

8.1.2.8 Tolerances of measurements ....................................................................................19

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8.2 Soundness .................................................................................................................................21

8.2.1 Soundness of the gas circuit ...............................................................................................21

8.2.2 Soundness of the combustion circuit ..............................................................................21

8.2.2.102.4 Requirements for the air supply circuit ...............................................................24

8.2.2.103.4 Combustion products evacuation ducts of type B boilers ............................25

8.2.3 Soundness of the water circuit .........................................................................................26

8.2.4 Soundness of the domestic water circuit ......................................................................26

8.3 Hydraulic resistance .............................................................................................................26

8.4 Heat inputs and heat output ..............................................................................................26

8.5 Limiting temperatures .........................................................................................................27

8.5.1 General ......................................................................................................................................27

8.5.2 Limiting temperatures of the adjusting, control and safety devices ...................27

8.5.3 Limiting temperatures of the side walls, the front and the top ............................27

8.5.4 Limiting temperature of the test panels and the floor .............................................28

8.6 Ignition, cross lighting, flame stability ..........................................................................28

8.6.1 General ......................................................................................................................................28

8.6.2 Limit conditions .....................................................................................................................28

8.6.3 Special flue conditions .........................................................................................................28

8.6.3.1 General test conditions ...............................................................................................29

8.6.3.2 Test conditions for Type C , C and C boilers .....................................................29

1 3 9

8.6.3.3 Test conditions for type C boilers ..........................................................................30

8.6.3.4 Test conditions for type C boilers ..........................................................................30

8.6.3.5 Test conditions for type C boilers ..........................................................................30

8.6.3.6 Test conditions for type C boilers ..........................................................................30

8.6.3.7 Test conditions for type C boilers ..........................................................................30

8.6.3.8 Test conditions for type C boilers ..........................................................................30

8.6.3.9 Test conditions for type C boilers ......................................................................30

(10)

8.6.3.10 Test conditions for type C boilers ......................................................................31

(11)

8.6.3.11 Test conditions for type B , B boilers ...................................................................31

2 3

8.6.3.12 Test conditions for type B boiler ............................................................................31

8.6.4 Reduction of the gas rate of the ignition burner ........................................................31

8.6.4.1 Requirements .................................................................................................................31

8.6.5 Test conditions .......................................................................................................................31

8.7 Reduction of the gas pressure ...........................................................................................32

8.8 Defective closure of the gas valve immediately upstream of the main

burner ........................................................................................................................................32

8.9 Pre-purge ..................................................................................................................................32

8.9.1.1 Determination of the pre-purge volume: .............................................................33

8.9.1.2 Determination of the pre-purge time: ...................................................................34

8.9.1.3 Test for safely weaving pre-purge under safety of operation condition ...34

8.9.2 Requirements for verification of the protected nature of a combustion

chamber ....................................................................................................................................34

8.9.3 Test conditions for verification of the protected nature of a combustion

chamber ....................................................................................................................................34

8.9.4 Requirements for verification of normal ignition in a combustible air/gas

mixture for type C boilers incorporating a fan ...........................................................34

8.9.5 Test conditions for verification of normal ignition in a combustible air/gas

mixture for type C boilers incorporating a fan ...........................................................34

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

standby time ............................................................................................................................35

8.11 Adjustment, control and safety devices .........................................................................35

8.11.1 General ......................................................................................................................................35

8.11.2 Boilers intended to be installed in a partially protected place .............................35

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8.11.3 Combination boilers .............................................................................................................35

8.11.4 Control devices .......................................................................................................................35

8.11.5 Ignition devices ......................................................................................................................35

8.11.6 Flame supervision device ...................................................................................................35

8.11.6.1 Thermoelectric device .................................................................................................35

8.11.6.2 Automatic burner control system ...........................................................................35

8.11.6.2.1 Test conditions for ignition of Modular boilers .................................................35

8.11.7 Gas pressure regulator ........................................................................................................35

8.11.8 Thermostats and water temperature limiting devices ............................................35

8.11.101.3.3 Adjustment of the gas/air ratio .............................................................................38

8.12 Carbon monoxide ..................................................................................................................39

8.12.1 General ......................................................................................................................................39

8.12.2 Limit conditions .....................................................................................................................39

8.12.2.1 Test description .............................................................................................................39

8.12.2.2 Requirements .................................................................................................................39

8.12.2.3 Test conditions ...............................................................................................................39

8.12.3 Special conditions ..................................................................................................................40

8.12.3.1 Incomplete combustion ..............................................................................................40

8.12.3.1.1 Requirements .................................................................................................................40

8.12.3.1.2 Test conditions ...............................................................................................................40

8.12.3.2 Supplementary test for fan assisted boilers ........................................................40

8.12.3.3 Flame lift ...........................................................................................................................40

8.12.4 Sooting .......................................................................................................................................42

8.12.5 Supplementary test for low temperature boilers and condensing boilers ......42

8.13 NO ..............................................................................................................................................42

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

place ...........................................................................................................................................43

8.15 Formation of condensate ....................................................................................................43

8.16 Temperature of combustion products ...........................................................................43

8.17 Sound power level .................................................................................................................44

All test are executed at nominal working combustion product temperature. ..............57

9 Useful efficiencies ..................................................................................................................60

10 Electric auxiliary energy .....................................................................................................60

11 Risk assessment .....................................................................................................................60

12 Marking and instructions ...................................................................................................60

12.1 Boiler marking ........................................................................................................................60

12.2 Instructions ..............................................................................................................................61

12.2.1 Instructions for installation ...............................................................................................61

12.2.1.1 General ..............................................................................................................................61

12.2.1.2 For installation and adjustment of the gas circuit.............................................61

12.2.1.3 For installation on the central heating circuit ....................................................61

12.2.1.4 For installation of the combustion circuit ............................................................61

12.2.1.5 For boilers intended to be installed in a partially protected place .............67

12.2.2 Instructions for use and servicing ...................................................................................67

12.3 Presentation ............................................................................................................................67

Figures .....................................................................................................................................................67

Listing of tables and numbers .........................................................................................................80

Annexes ...................................................................................................................................................80

Annex XA (normative) Test apparatus for type C boilers .....................................................81

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oSIST prEN 15502-2-1:2021
prEN 15502-2-1:2021 (E)
Annex XB (normative) Test methods to determine the effects of long-term thermal
load, long-term condensate exposure, condensing/ non- condensing cycling

and resistance to UV radiation..........................................................................................82

Annex XC (informative) This annex is empty on purpose ......................................................83

XC.1 This clause is empty on purpose ......................................................................................83

Annex XD (informative) Example on calculation of common duct system for type C
(11)

boilers ........................................................................................................................................84

Annex ZA (informative) Left empty on purpose ........................................................................86

Annex ZB (informative) Clauses of this European Standard addressing the methods

for the verification of the efficiency of the EU Directive 92/42/EEC, relating to

the efficiency of new hot boilers with an output of (4 – 400) kW ........................87

Annex ZC (informative) Relationship between this European Standard and the
ecodesign requirements of Commission Regulation (EU) No 813/2013 L

239/136 aimed to be covered ...........................................................................................88

Annex ZD (informative) Relationship between this European Standard and the
energy labelling requirements of Commission Delegated Regulation (EU) No

811/2013 L 239/1 aimed to be covered .......................................................................91

Annex ZE (informative) Relationship between this European Standard and the
essential requirements of Regulation (EU) 2016/426 of the European
Parliament and of the Council of 9 March 2016 on appliances burning gaseous

fuels and repealing Directive 2009/142/EC aimed to be covered ......................94

Bibliography ....................................................................................................................................... 109

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oSIST prEN 15502-2-1:2021
prEN 15502-2-1:2021 (E)
European foreword

This document (prEN 15502-2-1:2021) has been prepared by Technical Committee CEN/TC 109

“Central heating boilers using gaseous fuels”, the secretariat of which is held by NEN.

This document is currently submitted to the CEN Enquiry.
This document supersedes EN 15502-2-1:2012+A1:2016.

The main technical changes compared to EN 15502-2-1:2012+A1:2016 are the following:

I) Resulting from the revision of EN 15502-1 into FprEN 15502-1:2020

a) Technical changes related to eco-design and energy labelling for appliances ≤ 400 kW:

1) deletion of the requirements that can be found in the legislation itself;
2) modification of the Annexes ZC and ZD.
b) New or generally reworded requirements:
1) separation between requirements and test methods in to different clauses;
2) moving additional common parts from EN 15502-2-1:2012+A1:2016 and/or

EN 15502-2-2:2014 to FprEN 15502-1:2020 (for example all definitions used in the parts

2 are moved to part 1; Therefore most of the definitions in this part are now by reference

to part 1);

3) definitions added for Instructions for installation, Instructions for use and servicing, and

Technical documentation and consequently applied throughout the document;

4) improved wording of definitions related to the air supply and combustion products

circuit;

5) improved the references of the Annexes Z. The Annex Z referring to the GAD has been

removed and an Annex Z referring to the GAR has been inserted;

6) only “instructions for installation” and “instructions for use and servicing” are defined.

Therefore these are the only instructions to be used in this document;
7) improved definitions 'ducts / circuits';

8) definition weighted value of the NOx concentration added. With regard to Ecodesign, it is

clarified that the emissions declared are the emissions when using the references gases.

c) Limitation of the scope compared to the standards superseded by the EN 15502 series (that

were cited in the OJEU under the GAD):

1) Types B and B appliances, as covered in EN 297:1994 /A4:2004 are not covered by this

14 4
standard as there seems to be a limited market for these appliances due to the

introduction of the Ecodesign Directive that only has an exemption for B appliances.

NOTE B and B are non condensing appliances;
14 4
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oSIST prEN 15502-2-1:2021
prEN 15502-2-1:2021 (E)
2) this document does not cover all the requirements for appliances designed and
constructed to burn gas containing toxic components. In the past it was always

considered that the gases were not toxic, however this was never clearly indicated in the

scope. In fact this is not a change of scope, but a clarification of the scope;

3) this document 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 AB). In the past no big variation in gas quality occurred. Due

to the EASEE-gas CBP wide variations of gas quality are considered. As these were never

covered in this document, the scope is modified to make clear that these variations are

not covered. In fact this is not a change of scope, but a clarification of the scope;

4) this document does not cover all the requirements for appliances above 1 000 kW. In fact

this is not a change of scope, but a clarification of the scope;

5) this document does not cover all the requirements for appliances having a supplementary

heater. In fact this is not a change of scope, but a clarification of the scope as these

appliances were never included in the past, however due to the Ecodesign Regulation it

has become necessary to mention this more explicitly;
II) Additional changes, not resulting from the revision of EN 15502-1 into
FprEN 15502-1:2020.

a) Technical changes related to eco-design and energy labelling for appliances ≤ 400 kW:

1) no changes.
b) New or generally reworded requirements:
1) Separation between requirements and test methods in to different clauses;
2) changes resulting from moving additional common parts from
EN 15502-2-1:2012+A1:2016 and/or EN 15502-2-2:2014 to FprEN 15502-1:2020 (for

example all definitions used in the parts 2 are moved to part 1; Therefore most of the

definitions in this part are now by reference to part 1);

3) the definitions for Instructions for installation, Instructions for use and servicing, and

Technical documentation are now consequently applied throughout the document;
4) an Ann
...

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