Gas-fired central heating boilers - Type B11 and B11BS boilers fitted with atmospheric burners of nominal heat input not exceeding 70 kW

TC - Replace Tables 12 and 13

Heizkessel für gasförmige Brennstoffe - Heizkessel des Typs B11 und B11BS mit atmosphärischen Brennern mit einer Nennwärmebelastung kleiner als oder gleich 70 kW

Chaudieres de chauffage central utilisant les combustibles gazeux - Chaudieres des types B11 et B11BS equipées de bruleurs atmosphériques dont le débit calorifique nominal est inférieur ou égal a 70 kW

Plinski kotli za centralno gretje – Tipa B11 in B11BS z atmosferskimi gorilniki z imensko močjo do vključno 70 kW – Popravek AC k dopolnilu A2

General Information

Status
Withdrawn
Publication Date
31-Aug-2006
Withdrawal Date
13-Aug-2014
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
14-Aug-2014
Due Date
06-Sep-2014
Completion Date
14-Aug-2014

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Corrigendum
SIST EN 297:1997/A2:1997/AC:2006
English, French and German language
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Heizkessel für gasförmige Brennstoffe - Heizkessel des Typs B11 und B11BS mit atmosphärischen Brennern mit einer Nennwärmebelastung kleiner als oder gleich 70 kWChaudieres de chauffage central utilisant les combustibles gazeux - Chaudieres des types B11 et B11BS equipées de bruleurs atmosphériques dont le débit calorifique nominal est inférieur ou égal a 70 kWGas-fired central heating boilers - Type B11 and B11BS boilers fitted with atmospheric burners of nominal heat input not exceeding 70 kW97.100.20Plinski grelnikiGas heaters91.140.10Sistemi centralnega ogrevanjaCentral heating systemsICS:Ta slovenski standard je istoveten z:EN 297:1994/A2:1996/AC:2006SIST EN 297:1997/A2:1997/AC:2006en,fr,de01-september-2006SIST EN 297:1997/A2:1997/AC:2006SLOVENSKI

STANDARD
SIST EN 297:1997/A2:1997/AC:2006

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 297:1994/A2:1996/ACJune 2006Juin 2006Juni 2006ICS 91.140.10English versionVersion FrançaiseDeutsche FassungGas-fired central heating boilers - Type B11 and B11BS boilers fitted withatmospheric burners of nominal heat input not exceeding 70 kWChaudières de chauffage central utilisantles combustibles gazeux - Chaudières destypes B11 et B11BS equipées de brûleursatmosphériques dont le débit calorifiquenominal est inférieur ou égal à 70 kWHeizkessel für gasförmige Brennstoffe -Heizkessel des Typs B11 und B11BS mitatmosphärischen Brennern mit einerNennwärmebelastung kleiner als odergleich 70 kWThis 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 297:1994/A2:1996/AC:2006 D/E/FSIST EN 297:1997/A2:1997/AC:2006

EN 297:1994/A2:1996/AC:2006 (E/F/D) 2 English version Replace Table 12 by the following: Table 12 – 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 297:1997/A2:1997/AC:2006
EN 297:1994/A2:1996/AC:2006 (E/F/D) 3 Replace Table 13 by the following:
Table 13 – Symbols and quantities needed to calculate the efficiency at part l
...

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