SIST EN 303-3:1999/AC:2006 - Heating boilers - Part 3: Gas-fired central heating boilers

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kotli za gretje – 3. del: Plinski kotli za gretje – Sestav kotla in gorilnika s prisilnim vlekom – Popravek ACHeizkessel - Teil 3: Zentralheizkessel für gasförmige Brennstoffe - Zusammenbau aus Kessel und GebläsebrennerChaudieres de chauffage - Partie 3: Chaudieres de chauffage central utilisant les combustibles gazeux - Assemblage d'un corps de chaudiere et d'un bruleur a air souffléHeating boilers - Part 3: Gas-fired central heating boilers - Assembly comprising a boiler body and a forced draught burner97.100.20Plinski grelnikiGas heaters91.140.10Sistemi centralnega ogrevanjaCentral heating systemsICS:Ta slovenski standard je istoveten z:EN 303-3:1998/AC:2006SIST EN 303-3:1999/AC:2006en,fr,de01-september-2006SIST EN 303-3:1999/AC:2006SLOVENSKI
STANDARD

SIST EN 303-3:1999/AC:2006

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 303-3:1998/ACJune 2006Juin 2006Juni 2006ICS 91.140.10English versionVersion FrançaiseDeutsche FassungHeating boilers - Part 3: Gas-fired central heating boilers - Assemblycomprising a boiler body and a forced draught burnerChaudières de chauffage - Partie 3:Chaudières de chauffage central utilisantles combustibles gazeux - Assemblage d'uncorps de chaudière et d'un brûleur à airsouffléHeizkessel - Teil 3: Zentralheizkessel fürgasförmige Brennstoffe - Zusammenbauaus Kessel und GebläsebrennerThis corrigendum becomes effective on 7 June 2006 for incorporation in the three official languageversions of the EN.Ce corrigendum prendra effet le 7 juin 2006 pour incorporation dans les trois versions linguistiquesofficielles de la EN.Die Berichtigung tritt am 7.Juni 2006 zur Einarbeitung in die drei offiziellen Sprachfassungen der ENin Kraft.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members.Tous droits d'exploitation sous quelque forme et de quelque manière que ce soit réservés dans le monde entier auxmembres nationaux du CEN.Alle Rechte der Verwertung, gleich in welcher Form und in welchem Verfahren, sind weltweit den nationalen Mitgliedernvon CEN vorbehalten.Ref. No.:EN 303-3:1998/AC:2006 D/E/FSIST EN 303-3:1999/AC:2006

EN 303-3:1998/AC:2006 (E/F/D) 2 English version Replace Table 6 with the following: Table 6 – Calculation of the useful part load efficiency Conditions of operation Heat input Cycle time (s)
Meas. Useful efficiency (%) 1 30 % reduced rate QQ2n=⋅03, t2600= η2 ηu = η2 2 Full rate n1QQ= 1) t Q -
QQ - Q11313180600=
η1 u100ηη=×111333113310008 Qt + , Qt - PtQt + Qts
Controlled off Q3 = permanent ignition burner 13600tt−= Ps
3 Reduced rate n213,0QQ⋅> t21 =Q - QQ 600 - Q 180321321
η21 10080100332121333212121u×=tQ + tQtP - tQ , + tQ sηη
Controlled off Q3 = permanent ignition burner 213600tt−= Ps
4 Full rate Q1 = Qn 1) t1 =180600122122 Q -
QQ - Q
η1 uηηη=×111222222112222100100100 Qt + () QtQt + Qt
Reduced rate QQ22n<⋅03, tt221600=− η22
5 Reduced rate 1 QQ21n>⋅03, t21=180 Q - 600 QQ - Q21222122
η21 100 +
100 +
10022222121222222212121×=tQtQtQtQu
Reduced rate 2 QQ22n<⋅03, tt2221600=− η22
6 Full rate Reduced rate Q1 = Qn 1) Q2 t1 = measured value (see annex Q)
t2 =Q - QQ)t - (600 - Q)t - (180323111 η1 η2 ηηηu100100=×11122233311223308100Qt +Qt +, Qt -PtQt + Qt + Qts
Controlled off Q3 = permanent ignition burner )(600213ttt+−= Ps
1) Qn is replaced by the arithmetic mean Qa of the maximum and minimum heat input for range-rated boilers.
SIST EN 303-3:1999/AC:2006

EN 303-3:1998/AC:2006 (E/F/D) 3 Replace Table 5 with the following:
Table 5 – Symbols and quantities needed to calculate the efficiency at part load Operational phases of the main burner H
...

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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";
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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.

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EN 15502-2-1:2022

This European Standard 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 FprEN15502-1:2020
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NOTE   For further background information on appliance types see EN 1749:2020.
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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."
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This European Standard does not cover all the requirements for:
aa)   Appliances above 1000 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 XC);"
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 (common) 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.
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EN 15502-2-2 specifies, the requirements and test methods concerning, in particular the construction, safety, fitness for purpose, and rational use of energy, as well as the classification and marking of gas-fired central heating boilers that are fitted with atmospheric burners, fan assisted atmospheric burners and are hereafter referred to as “boilers”. Where the word boiler is used, this is to be read as the boiler including its connecting ducts, ducts and terminals, if any. This European Standard covers gas-fired central heating boilers type B11, B11BS, B12, B12BS, B13, B13BS according to the classification in CEN/TR 1749:2009: a) that have a nominal heat input (on the basis of net calorific value) not exceeding 70 kW; b) that use one or more combustible gases of the three gas families at the pressures stated in EN 437; 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 are declared in the technical instructions to be either a “low temperature boiler” or a “standard boiler”. If no declaration is given the boiler is to be considered a “standard boiler”; f) which are intended to be installed either indoors or in a partially protected place; g) which are either not intended to produce hot water, or are intended to produce hot water either by the instantaneous or storage principle, the whole being marketed as a single unit. h) which are designed for either sealed water systems or for open water systems. This European Standard is to be used in conjunction with the General Requirements Standard EN 15502-1. For applications within the scope of the PED further requirements may be necessary (e.g. situations where the maximum allowable temperature exceeds 110 °C, or where volume times maximum allowable pressure is over 50 bar x litres). This standard 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 shall be assessed. An example of an assessment methodology, based upon risk assessment and which covers the essential requirements of the Gas Appliance Directive, is given in Clause 11. This standard does not cover all the requirements for: i) 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 DD of EN 15502-2-1:2012); j) appliances using flue dampers; k) appliances that have a nominal heat input (on the basis of net calorific value) exceeding 70 kW; l) appliances of the types A, B14, B2, B3, B4, B5 and C; m) appliances intended to be connected to a (common) flue having mechanical extraction; n) appliances with gas/air ratio control; o) modular boilers; p) boilers which can give rise to condensation under certain circumstances; q) boilers intended to be installed in a room with a foreseeable negative pressure relative to the pressure in the flue system.

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3   that can give rise to condensation under certain circumstances;
3   of the standard and low-temperature types.
This European Standard applies to boilers designed for sealed water systems or for open water systems.
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3   where the combustion circuit is sealed with respect to the room where the boiler is installed;
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SIST EN 656:2001/A1:2006(Amendment)

Gas-fired central heating boilers - Type B boilers of nominal heat input exceeding 70 kW, but not exceeding 300 kW

EN 656:1999/A1:2006

Add to the first list of indents:
-   of the standard type possibly producing condensation in certain circumstances;
-   of the low-temperature type;"
Delete in the second list of indents:
-   of the low-temperature type;

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SIST EN 303-3:1999/A2:2004(Amendment)

Heating Boilers - Part 3 : Gas-fired heating boilers - Assembly comprising a boiler body and a forced draught burner

EN 303-3:1998/A2:2004

Replace the second paragraph by the following text :
"This European Standard applies to standard boilers and low-temperature boilers with a nominal heat output not exceeding 1000 kW and with a water temperature at normal operation not exceeding 105 °C."
Replace the 2nd dash of the third paragraph by the following text :
"- condensing boilers;"
Delete the last but one paragraph of EN 303-3 :
"This European Standard does not contain all the necessary requirements for low temperature boilers. Nevertheless, the testing methods defined by this European Standard for the determination of useful efficiencies can be used for low temperature boilers, after being adapted in accordance with annex H."

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SIST EN 656:2001(Main)

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Heating boilers - Part 3: Gas-fired central heating boilers - Assembly comprising a boiler body and a forced draught burner

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This European Standard specifies the requirements and test methods for the construction, the safety and the rational energy usage of an assembly made up of a boiler body complying with EN 303- 11) and a forced draught gas burner complying with EN 676, using combustible gases, hereafter referred to as a "boiler". This European Standard applies to a boiler: - with a nominal output not exceeding 1 000 kW. This European Standard does not contain all the necessary requirements for: - assemblies designed as units; - condensing boilers and low temperature boilers; - boilers intended to be installed in the open; - boilers permanently fitted with more than one flue outlet; - boilers fitted with a draught diverter; - boilers intended to be connected to a common flue having mechanical extraction. This European Standard does not apply to living-space dedicated boilers If the boiler body has already been tested with a liquid fuel burner, in accordance with EN 303-1, EN 303-2 and EN 304, only the tests described in annex G need to be performed. In the case of a range of boilers, see annex F. This European Standard does not contain all the necessary requirements for low temperature boilers. Nevertheless, the testing methods defined by this European Standard for the determination of useful efficiencies can be used for low temperature boilers, after being adapted in accordance with annex H. This European Standard only covers type testing.

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SIST EN 15502-2-1:2013/kFprA1:2016(Amendment)

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

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This European Standard specifies, the requirements and test methods concerning, in particular, the construction, safety, fitness for purpose, and rational use of energy, 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". Where the word boiler is used, it needs to be read as the boiler including its connecting ducts, ducts and terminals, if any. This European Standard covers gas-fired central heating boilers from the types C1 up to C9 and the types B2, B3 and B5, according to the classification in CEN/TR 1749: 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; 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 may or may not give rise to condensation under certain circumstances; f) which are declared in the installation instructions 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 either indoors or outdoors in a partially protected place; h) which may include the facility to produce hot water, either by the instantaneous or storage principle, the whole being marketed 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. This European Standard will be used in conjunction with the General Requirements Standard EN 15502-1. This European Standard 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 and which covers the essential requirements of the Gas Appliance Directive, is given in Clause 11. This European Standard does not cover all the requirements for: k) 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 DD); l) Appliances using flue dampers; m) Appliances of the types B21, B31, B51, C21, C41, C51, C61, C71 and C81; n) C7 appliances that have a nominal heat input (on the basis of net calorific value) exceeding 70 kW; o) Appliances incorporating flexible plastic flue liners; p) Appliances designed to become connected to a combined flue duct system that is designed to operate under overpressure (for example Ca)); q) Appliances incorporating a combined combustion products circuit that is designed to operate under overpressure (for example Cb)); r) Appliances intended to be connected to a (common) flue having mechanical extraction.

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