SIST EN 297:1997/A4:2005
(Amendment)Gas-fired central heating boilers - Type B11 and B11BS boilers, fitted with atmospheric burners of nominal heat input not exceeding 70 kW
Gas-fired central heating boilers - Type B11 and B11BS boilers, fitted with atmospheric burners of nominal heat input not exceeding 70 kW
This amendment extends the original field of application of EN 297 that was restricted to type B-boilers with atmospheric burners, to type B boilers with fan-assisted burners.
Heizkessel für gasförmige Brennstoffe - Heizkessel der Typen B11 und B11BS mit atmosphärischen Brennern, mit einer Nennwärmeleistung kleiner als oder gleich 70 kW
Der vorliegende Text ist zu ersetzen durch:
"Diese Europäische Norm legt die Anforderungen und Prüfungen für den Bau, die Sicherheit, die Gebrauchsgüte und den sparsamen Energieeinsatz, die Klasseneinteilung und die Kennzeichnung von Heizkesseln fest, die mit gasförmigen Brennstoffen betrieben werden (nachfolgend kurz "Kessel" genannt).
Diese Norm gilt für Kessel der Arten B11, B11BS, B12, B12BS, B13, B13BS, B14, B22, B23, B32, B33, B44, B52 und B53, wie sie in 1.4.2.2 aufgelistet sind:
- die mit Gasen der drei Gasfamilien und den Drücken nach 4.1.4 betrieben werden;
- die eine Nennwärmebelastung von kleiner oder gleich 70 kW haben (bezogen auf den Heizwert);
- bei denen die Temperatur des Wassers unter den üblichen Betriebsbedingungen 95 °C nicht
überschreitet;
- deren maximaler wasserseitiger Betriebsdruck 6 bar nicht überschreitet;
- die mit atmosphärischen Brennern, atmosphärischen Brennern mit Gebläseunterstützung für die
Heranführung der Verbrennungsluft oder die Abführung der Verbrennungsprodukte oder mit
Vormischbrennern ausgerüstet sind;
- und die mit elektrisch betriebenen mechanischen Zugbegrenzern ausgerüstete sein können, die hinter
dem Wärmetauscher angeordnet sind und als zum Kessel gehörendes Teil geprüft werden.
Die vorliegende Norm beinhaltet nicht alle notwendigen Anforderungen für:
Kessel:
- die zur Installation im Freien vorgesehen sind:
- mit mehreren Wärmeerzeugern, die mit nur einer Strömungssicherung ausgerüstet sind;
- mit Brennwertnutzung;
- die für den Anschluss an einen gemeinsamen Schornstein mit mechanischer Absaugung vorgesehen
sind;
- die mit einer handbetätigten Einstellung der Luftzufuhr und/oder der Abgasabführung ausgerüstet sind;
- mit Warmwassererwärmung (Heizung und Trinkwassererwärmung);
- ohne Strömungssicherung und ohne eingebautes Gebläse;
- insbesondere für die Arten B21, B31, B41, B42, B43 und B51;
auch nicht für Geräte:
- die den
Chaudieres de chauffage central utilisant les combustibles gazeux - Chaudieres de types B11 et B11BS équipées de bruleurs atmosphériques dont le débit calorifique nominal est inférieur ou égal a 70 kW
Remplacer le texte existant par :
«La présente Norme européenne définit les spécifications et les techniques d'essais relatives a la construction, la sécurité, l'aptitude a la fonction, l'utilisation rationnelle de l'énergie, la classification et le marquage des chaudieres de chauffage central utilisant les combustibles gazeux, appelées ci-apres «chaudieres».
La présente norme s'applique aux chaudieres des types B11, B11BS, B12, B12BS, B13, B13BS, B14 , B22, B23, B32, B33, B44 B52 et B53 telles que listées au 1.4.2.2 :
3 utilisant des gaz correspondant aux trois familles de gaz et aux pressions indiquées a l'article 4.1.4 ;
3 de débit calorifique nominal inférieur ou égal a 70 kW (sur pouvoir calorifique inférieur) ;
3 dont la température du fluide caloporteur ne dépasse pas 95 °C en fonctionnement normal ;
3 dont la pression maximale de service d'eau ne dépasse pas 6 bar ;
3 équipées de bruleurs atmosphériques, de bruleurs atmosphériques assistés d'un ventilateur pour l'amenée d'air de combustion ou l'évacuation des produits de combustion ou de bruleurs a prémélange total ;
3 et qui peuvent etre équipées d'obturateurs de tirage mécaniques fonctionnant électriquement placés en aval de l'échangeur de chaleur et essayés comme partie intégrante de la chaudiere.
La présente norme ne contient pas toutes les exigences nécessaires pour :
les chaudieres :
3 destinées a etre installées en plein air ;
3 comportant plusieurs générateurs de chaleur associés a un seul coupe-tirage antirefouleur ;
3 a condensation ;
3 destinées a etre raccordées a une cheminée commune a extraction mécanique ;
3 munies de moyens manuels de réglage d'alimentation en air et/ou de réglage de l'évacuation des produits de combustion ;
3 a deux services (chauffage central et production d'eau chaude sanitaire) ;
3 sans coupe-tirage et sans ventilateur ;
3 spécifiquement des types B21, B31, B41, B42, B43 et B51.
ni pour les appareils :
3 combinant la fonction de radiateur indépendant
Plinski kotli za centralno ogrevanje - Tipa B11 in B11BS z atmosferskimi gorilniki z imensko močjo do vključno 70 kW - Dopolnilo A4
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 297:1997/A4:2005
01-april-2005
3OLQVNLNRWOL]DFHQWUDOQRRJUHYDQMH7LSD%LQ%%6]DWPRVIHUVNLPLJRULOQLNL]
LPHQVNRPRþMRGRYNOMXþQRN:'RSROQLOR$
Gas-fired central heating boilers - Type B11 and B11BS boilers, fitted with atmospheric
burners of nominal heat input not exceeding 70 kW
Heizkessel für gasförmige Brennstoffe - Heizkessel der Typen B11 und B11BS mit
atmosphärischen Brennern, mit einer Nennwärmeleistung kleiner als oder gleich 70 kW
Chaudieres de chauffage central utilisant les combustibles gazeux - Chaudieres de types
B11 et B11BS équipées de bruleurs atmosphériques dont le débit calorifique nominal est
inférieur ou égal a 70 kW
Ta slovenski standard je istoveten z: EN 297:1994/A4:2004
ICS:
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
97.100.20 Plinski grelniki Gas heaters
SIST EN 297:1997/A4:2005 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 297:1997/A4:2005
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SIST EN 297:1997/A4:2005
EUROPEAN STANDARD
EN 297:1994/A4
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2004
ICS 91.140.10
English version
Gas-fired central heating boilers - Type B11 and B11BS boilers,
fitted with atmospheric burners of nominal heat input not
exceeding 70 kW
Chaudières de chauffage central utilisant les combustibles Heizkessel für gasförmige Brennstoffe - Heizkessel der
gazeux - Chaudières de types B11 et B11BS équipées de Typen B11 und B11BS mit atmosphärischen Brennern, mit
brûleurs atmosphériques dont le débit calorifique nominal einer Nennwärmebelastung kleiner als oder gleich 70 kW
est inférieur ou égal à 70 kW
This amendment A4 modifies the European Standard EN 297:1994; it was approved by CEN on 14 November 2003.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this
amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references concerning such
national standards may be obtained on application to the Central Secretariat or to any CEN member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 297:1994/A4:2004: E
worldwide for CEN national Members.
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SIST EN 297:1997/A4:2005
EN 297:1994/A4:2004 (E)
Contents
Foreword.5
1.3.3.2.6 combustion circuit.7
1.3.3.2.7 air supply circuit .7
1.3.3.2.8 combustion products evacuation duct.8
1.3.3.2.9 damper.8
1.3.3.2.10 total passage.8
1.3.3.2.11 terminal .8
1.3.3.2.12 terminal guard .8
1.4.2.2.2 Boiler types.9
1.4.2.2.2.1 Type B .9
1
1.4.2.2.2.2 Type B .9
2
1.4.2.2.2.3 Type B .9
3
1.4.2.2.2.4 Type B .9
4
1.4.2.2.2.5 Type B .9
5
1.4.2.2.3 Presence and position of a fan.9
2.1.2.5.1 Stability under mechanical loading.10
2.1.2.5.2 Stability under exposure to heat.10
2.1.2.5.3 Corrosion resistance .10
2.1.2.5.4 Resistance to condensate and moisture under normal operating conditions .10
2.1.7.2 Connection to the combustion products evacuation system.11
2.1.7.2.1 Boilers with a draught diverter.11
2.1.7.2.2 Boilers without a draught diverter.11
2.1.7.3 Boilers with a fan.11
2.1.7.3.1 Fan .11
2.1.7.3.2 Proof of air flow .11
2.1.7.4 Boilers having a gas/air ratio control.11
2.1.7.5 Control dampers in the air duct or combustion products circuit.12
2.1.7.6 Combustion products evacuation ducts .12
2.1.7.7 Terminal .12
2.1.7.8 Terminal guard .12
2.2.11.1 General.13
2.2.11.2 Visual indication .13
2.2.11.3 Safety shut-off valve.14
2.2.11.4 Minimum passage .14
3.2.2.2 Type B and B boilers (except B and B boilers) .14
1 4 14 44
3.2.2.3 Type B , B , B and B boilers .14
14 2 44 5
3.2.2.4 Type B boilers .14
3
3.2.2.5 Combustion products evacuation ducts of type B and B boilers passing through walls .14
4 5
2
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SIST EN 297:1997/A4:2005
EN 297:1994/A4:2004 (E)
3.4.3.1 General .15
3.4.3.2 Verification of the protected nature of a combustion chamber .16
3.5.9.1 General .16
3.5.9.2 Supervision of the combustion air or combustion products rate.17
3.5.9.3 Gas/air ratio controls.17
3.5.9.3.1 Endurance.17
3.5.9.3.2 Leakage of non-metallic control tubes .17
3.5.9.3.3 Safety of operation.17
3.5.9.3.4 Adjustment of the gas/air ratio .18
3.5.10.1 Resistance of flue dampers to high temperature.18
3.5.10.2 Long-term performance of combustion air and flue dampers.18
3.6.1.2 Normal conditions .18
3.6.1.3 Special conditions .18
3.6.1.4 Sooting.18
4.2.2.2 Type B and B boilers (except B and B boilers) .19
1 4 14 44
4.2.2.3 Type B , B , B and B boilers.19
14 2 44 5
4.2.2.4 Type B boilers.19
3
4.2.2.5 Combustion products evacuation ducts of Types B and B boilers passing through walls.19
4 5
4.4.2.2.2.2 Downdraught in type B and B boilers, except in type B and B boilers.20
1 4 14 44
4.4.2.2.2.3 Downdraught conditions in type B , B , B ,B and B boilers.20
14 2 3 44 5
4.4.2.2.2.4 Updraught in all type B boilers, except in B and B .21
11 11BS
4.4.2.2.2.5 Type B and B boilers .21
4 5
4.4.3.1 General .21
4.4.3.2 Verification of the protected nature of a combustion chamber .21
4.5.9.1 General .22
4.5.9.2 Supervision of the combustion air or the combustion products rate.22
4.5.9.3 Gas/air ratio controls.23
4.5.9.3.1 Endurance.23
4.5.9.3.2 Leakage of non-metallic control tubes .23
4.5.9.3.3 Safety of operation.24
4.5.9.3.4 Adjustment of the gas/air ratio .24
4.5.10.1 Resistance of flue dampers to high temperature.24
4.5.10.2 Long-term performance of combustion air and flue dampers.24
4.6.1.3 Special conditions .25
4.6.1.3.1 Incomplete combustion .25
4.6.1.3.2 Flue conditions.25
4.6.1.3.2.1 General .25
4.6.1.3.2.2 Supplementary test for fan-assisted boilers.25
4.6.1.4 Sooting.25
A.1 Categories marketed in the various countries .26
3
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SIST EN 297:1997/A4:2005
EN 297:1994/A4:2004 (E)
A.2 Boiler supply pressures.29
A.3 Flue connection diameters in the various countries.30
B.2 Special categories marketed nationally or locally.32
B.3 Particular conditions.32
B.3.1 Belgium .32
B.3.2 France .32
− boilers with or without fan, but with permanent or alternating ignition burner;.32
− boilers with fan and pre-purge. .32
F.2 Minimum requirements for boilers with fan, without permanent or alternating ignition burner and without pre-
purge 33
O.1 Description of the test .35
O.2 Calculation example.36
P.1 General situation .37
P.2 Specification of test assembly.37
P.3 Situations with horizontal and vertical terminals .37
4
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SIST EN 297:1997/A4:2005
EN 297:1994/A4:2004 (E)
Foreword
This document (EN 297:1994/A4:2004) has been prepared by Technical Committee CEN /TC 109 "Central heating
boilers using gaseous fuels", the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an identical text or
by endorsement, at the latest by April 2005, and conflicting national standards shall be withdrawn at the latest by
April 2005.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark,
Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
This document has been prepared under a mandate given to CEN by the European Commission and the European
Free Trade Association, and supports essential requirements of EU Directive(s).
With this amendment, the requirements and test methods for type B boilers with fan-assisted combustion are
introduced in EN 297. In addition requirements and test procedures for non-fanned appliances are modified.
5
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SIST EN 297:1997/A4:2005
EN 297:1994/A4:2004 (E)
Title of the document
Change in the title of the document
“ Type B and B boilers"
11 11BS
to
“ Type B boilers"
1.1 Field of application
Replace the existing text by:
“ This document specifies the requirements and test methods for the construction, safety, fitness for purpose,
rational use of energy, classification and marking of gas-fired central heating boilers, hereafter referred to as
‘boilers’.
This document applies to type B , B , B , B , B , B , B , B , B , B , B , B , B and B boilers
11 11BS 12 12BS 13 13BS 14 22 23 32 33 44 52 53
as listed in 1.4.2.2:
- that use gases corresponding to the three gas families and to the pressures stated in 4.1.4;
- that have a nominal heat input not exceeding 70 kW (on net calorific value);
- where the temperature of the water does not exceed 95 °C during normal operation;
- where the maximum water-side operating pressure does not exceed 6 bar;
- fitted with atmospheric burners, atmospheric burners assisted by a fan for the supply of combustion air
or the evacuation of combustion products or premixed burners;
- and that may be fitted with electrically operated mechanical flue dampers that are positioned
downstream of the heat exchanger and tested as an integral part of the boiler.
This document does not contain all the necessary requirements for:
boilers:
- intended to be installed in the open;
- having multiple heating units with a single draught-diverter;
- of the condensing type;
- intended to be connected to a common flue having mechanical extraction;
- fitted with manual means of adjusting the air supply and/or adjusting the evacuation of the combustion
products;
- of the combination type (central heating and domestic hot water production);
- without a draught-diverter and not incorporating a fan;
- specifically of the types B , B , B , B , B and B ;
21 31 41 42 43 51
nor for appliances:
- combining the functions of an independent space heater and a hot water generator for central heating.
This document only covers appliances where the fan, if any, is an integral part of the appliance.
This document only covers appliances where the flue damper, if any, is an integral part of the appliance.
This document only covers type testing.”
6
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SIST EN 297:1997/A4:2005
EN 297:1994/A4:2004 (E)
Add after "… as listed in 1.4.2.2:" at the end of the second sentence of the new clause 1.1 a footnote as follows:
“ National installation regulations may limit the modes of installation permitted in the territory of a CEN member
state.”
1.2 Normative references
Add:
”EN 1443, Chimneys — General requirements.
EN 1856-1, Chimneys — Requirements for metal chimneys — Part 1: System chimney products.
prEN 1856-2, Chimneys — Performance requirements for metal chimneys — Part 2: Metal liners and connecting
flue pipes products.
EN 1859, Chimneys — Metal chimneys — Test methods.
EN 12067-1, Gas/air ratio controls for gas burners and gas burning appliances — Part 1: Pneumatic types.
EN 50165, Electrical equipment of non-electric appliances for household and similar purposes — Safety
requirements."
Delete:
“ EN 60335-1, Safety of household and similar electrical appliances - Part 1:General requirements”
1.3 Definitions
Renumber clause 1.3.4.14 “living space dedicated boiler” as 1.3.5.
Add a new subclause, as follows:
“ 1.3.3.1.10.4
premixed burner
burner in which the gas and a quantity of air at least equal to that theoretically necessary for complete combustion
are mixed before the flame ports”
1.3.3.2.3
draught diverter
Add a note to the existing text:
“ NOTE For type B14 and B44 boilers the device may only be suitable to compensate for the pressure variations within the
flue system.”
Add new subclauses, as follows:
“ 1.3.3.2.5
protected combustion chamber
combustion chamber which is constructed such that an ignition in the combustion chamber does not ignite an
air/gas mixture outside the combustion chamber
1.3.3.2.6
combustion circuit
circuit including the air supply circuit, if any, the combustion chamber, the heat exchanger, the combustion products
evacuation duct, if any, and either the connection to the flue or to the terminal, if any
1.3.3.2.7
air supply circuit
means for transporting combustion air to the burner
7
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SIST EN 297:1997/A4:2005
EN 297:1994/A4:2004 (E)
1.3.3.2.8
combustion products evacuation duct
means for transporting combustion products to the flue or to the terminal
1.3.3.2.9
damper
device placed in the air inlet or the flue outlet to control the volume flow
1.3.3.2.10
total passage
cross-sectional area of the air inlet or the flue way that would be available to the combustion air or the flue gases if
the closure member of the damper was removed
1.3.3.2.11
terminal
device fitted to the outside of the building, which is connected to the combustion products evacuation ducts of a
type B or B boiler
4 5
1.3.3.2.12
terminal guard
device that protects the terminal from mechanical damage from outside influences"
1.3.3.3.19
1)
automatic valve
In the footnote, replace “A, B, C and D” to “A, B, C, D and J”:
1.3.4.6
ignition rate
Replace the existing text by:
“ average heat input during the ignition safety time.
Symbol Q
IGN
Unit: kilowatt (kW).”
Add three new subclauses, as follows:
“ 1.3.4.14
purge
mechanical introduction of air into the combustion products circuit in order to displace any gas/air mixture or
combustion product which could remain there. A distinction is made between:
- pre-purge: the purge that takes place between the start command and the ignition device being
energised;
- post-purge: the purge that is carried out after burner shutdown”
“ 1.3.4.15
air proving device
device intended to cause safety shutdown in the event of abnormal conditions of air supply or of combustion
products evacuation"
“ 1.3.4.16
gas/air ratio control
device that automatically adapts the combustion air rate to the gas rate or vice versa"
8
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SIST EN 297:1997/A4:2005
EN 297:1994/A4:2004 (E)
1.4.2.2 Classification according to the method of evacuation of the products of combustion (types)
Add at the end of this heading a new footnote as follows:
“ The classification used in this document is based upon the classification of CR 1749, "European scheme for the
classification of gas appliances according to the method of evacuation of the products of combustion (types)".”
Replace the existing text of 1.4.2.2 by:
“ 1.4.2.2.1 General
A Type B boiler is a boiler intended to be connected to a flue evacuating the combustion products to the
outside of the room where the boiler is installed. The combustion air is drawn directly from the room.
Type B boilers are classified into several types according to the mode of evacuation of the combustion
products.
The types are defined by two subscripts:
- The first subscript number is based upon the possible installation of the boiler with respect to the mode
of air supply and evacuation of the combustion products (see 1.4.2.2.2).
- The second subscript number is based upon the presence and position of an integral fan in the boiler
(see 1.4.2.2.3).
Type B boilers with a combustion products discharge safety device as defined in 1.3.3.2.4, are designated with
an extra subscript “BS”.
A type B boiler intended to operate with a pressurised flue duct is identified by an extra subscript “P”. This
subscript “P” is only used when installation in accordance with the boiler manufacturer’s instructions on a flue
4)
specified by the boiler manufacturer results in the flue operating at a positive pressure .”
1.4.2.2.2 Boiler types
1.4.2.2.2.1 Type B
1
A type B boiler incorporating a draught diverter.
1.4.2.2.2.2 Type B
2
A type B boiler without a draught diverter.
1.4.2.2.2.3 Type B
3
A type B boiler without a draught diverter, which is designed for connection to a common duct system. This
common duct system consists of a single natural draught flue. All pressurised parts of the appliance containing
products of combustion are completely enclosed by parts of the appliance supplying combustion air.
Combustion air is drawn into the appliance from the room by means of a concentric duct, which encloses the
flue. The air enters through defined orifices situated in the surface of the duct.
1.4.2.2.2.4 Type B
4
A type B boiler incorporating a draught diverter, that is designed for connection via its flue duct to its flue
terminal
1.4.2.2.2.5 Type B
5
A type B boiler without a draught diverter, that is designed for connection via its flue duct to its flue terminal.
1.4.2.2.3 Presence and position of a fan
- A type B boiler that does not incorporate a fan is identified by the second subscript number “1” (e.g.
B ).
11
- A type B boiler that incorporates a fan downstream of the combustion chamber/ heat exchanger and
upstream of the draught diverter, if any, is identified by the second subscript number “2” (e.g. B ).
12
9
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SIST EN 297:1997/A4:2005
EN 297:1994/A4:2004 (E)
- A type B boiler that incorporates a fan upstream of the combustion chamber/ heat exchanger is
identified by the second subscript number “3” (e.g. B ).
23
- A type B boiler that incorporates a fan downstream of both the combustion chamber/ heat exchanger
and the draught diverter is identified by the second subscript number “4” (e.g. B ).”
14
Add at the end of the last paragraph of the new clause 1.4.2.2.1 a new footnote as follows:
“ This identification “P” is in accordance with the designation of the positive pressure classes of tightness, agreed
by CEN/TC 166 “Chimneys”, depending on the pressure of operation of the duct (e.g. see EN 1443).”
2.1.2 Materials and method of construction
2.1.2.1 General
Add before the penultimate paragraph a new paragraph as follows:
“ For a separate combustion products evacuation duct which is supplied with a type B or B boiler, the
4 5
requirements given in 2.1.2.5, in accordance with EN 1443 apply as well as the applicable requirements of
EN 1856-1, prEN 1856-2 and EN 1859.”
Add a new subclause 2.1.2.5, as follows:
“ 2.1.2.5 Separate combustion products evacuation duct
2.1.2.5.1 Stability under mechanical loading
The duct shall be capable of withstanding horizontal and vertical loads. The following aspects shall be considered:
- compressive strength;
- tensile strength;
2
- where applicable, resistance to la
...
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