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CEN

EN 656:1999/A1:2006

(Amendment)

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

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

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;

Heizkessel für gasförmige Brennstoffe - Heizkessel der Bauart B mit einer Nennwärmebelastung größer als 70 kW aber gleich oder kleiner als 300 kW

Zu der ersten Aufzählung von Einrückungen ist hinzuzufügen:
―   der Standardbauart, die gegebenenfalls unter besonderen Umständen Kondensat erzeugen;
―   der Niedertemperaturbauart;
In der zweiten Aufzählung von Einrückungen ist zu streichen:
―   der Niedertemperaturbauart;

Chaudières de chauffage central utilisant les combustibles gazeux - Chaudières de type B dont le débit calorifique nominal est supérieur à 70 kW mais inférieur ou égal à 300 kW

Ajouter à la première liste de tirets :
-   de type standard pouvant donner lieu à condensation dans certaines circonstances ;
-    de type basse température ;
Supprimer dans la seconde liste de tirets :
-   de type basse température ;

Plinski kotli za centralno gretje – Tip kotlov B z imensko močjo nad 70 kW do vključno 300 kW – Dopolnilo A1

General Information

Status
Withdrawn
Publication Date
04-Jul-2006
Withdrawal Date
15-Feb-2022
ICS
91.140.10 - Central heating systems
Technical Committee
CEN/TC 109 - Central heating boilers using gaseous fuels
Drafting Committee
CEN/TC 109 - Central heating boilers using gaseous fuels
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
16-Feb-2022
Directive
2009/142/EC - DIRECTIVE 2009/142/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 30 November 2009 relating to appliances burning gaseous fuels
90/396/EEC - Appliances burning gaseous fuels
Ref Project
SIST EN 656:2001/A1:2006 - Gas-fired central heating boilers - Type B boilers of nominal heat input exceeding 70 kW, but not exceeding 300 kW

Relations

Amends
EN 656:1999 - Gas-fired central heating boilers - Type B boilers of nominal heat input exceeding 70 kW but not exceeding 300 kW
Effective Date
22-Dec-2008

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EN 656:2001/A1:2006EN 656:2001/A1:2006
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EN 656:2001/A1:2006
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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 656:2001/A1:2006
01-september-2006
3OLQVNLNRWOL]DFHQWUDOQRJUHWMH±7LSNRWORY%]LPHQVNRPRþMRQDGN:GR
YNOMXþQRN:±'RSROQLOR$
Gas-fired central heating boilers - Type B boilers of nominal heat input exceeding 70 kW,
but not exceeding 300 kW
Heizkessel für gasförmige Brennstoffe - Heizkessel der Bauart B mit einer
Nennwärmebelastung größer als 70 kW aber gleich oder kleiner als 300 kW
Chaudieres de chauffage central utilisant les combustibles gazeux - Chaudieres de type
B dont le débit calorifique nominal est supérieur a 70 kW mais inférieur ou égal a 300 kW
Ta slovenski standard je istoveten z: EN 656:1999/A1:2006
ICS:
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
97.100.20 Plinski grelniki Gas heaters
SIST EN 656:2001/A1:2006 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN 656:2001/A1:2006

---------------------- Page: 2 ----------------------

SIST EN 656:2001/A1:2006
EUROPEAN STANDARD
EN 656:1999/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2006
ICS 91.140.10

English Version
Gas-fired central heating boilers - Type B boilers of nominal heat
input exceeding 70 kW, but not exceeding 300 kW
Gas-fired central heating boilers - Type B boilers of nominal Heizkessel für gasförmige Brennstoffe - Heizkessel der
heat input exceeding 70 kW, but not exceeding 300 kW Bauart B mit einer Nennwärmebelastung größer als 70 kW
aber gleich oder kleiner als 300 kW
This amendment A1 modifies the European Standard EN 656:1999; it was approved by CEN on 20 March 2006.
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, Romania,
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
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 656:1999/A1:2006: E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------

SIST EN 656:2001/A1:2006
EN 656:1999/A1:2006 (E)
Contents Page
Foreword 3
4 Classification of boilers 4
4.3 Type of technologies 4
5.3.1 General 5
5.4.1 General 5
5.8.5 Removal of condensate for low temperature boilers 5
5.16 Chemical composition of the condensate for low-temperature boilers 6
6.5.9 Condensate discharge blockage 6
6.7.1 Useful efficiency at the nominal heat input 6
6.7.2 Useful efficiency at part load 7
6.8 Non-condensation in the flue 7

6.9.1 General 7
6.12 Condensation in a standard boiler 7
7.1.1.3 Characteristics and choice of test gases 8
7.5.9 Condensate discharge blockage 8
7.6 Combustion 8
7.7.1 Useful efficiency at the nominal heat input 8
7.7.2.1 General 8
7.7.2.2 Direct method 9
7.7.2.2.1 General 9
7.7.2.2.2 Operating mode No. 1 9
7.7.2.2.3 Operating mode No. 2 9
7.7.2.3 Indirect method 9
7.7.2.3 Indirect method 10
7.7.2.3.1 Measurements 10
7.7.2.3.1.1 Useful efficiency at the nominal heat input at reduced water temperature 10
7.7.2.3.1.2 Efficiency at the minimum controlled rate 12

7.7.2.3.1.3 Standby loss 12
7.7.2.3.1.4 Pilot recovery factor 13
7.7.2.3.2 Calculation 13
7.8 Non-condensation in the flue 14
7.8 Criteria for condensation in the flue 14
7.8.1 Determination of the flue losses 14
7.8.2 Minimum temperature of the combustion products 14
7.12 Condensation in a standard boiler 14
8.1.3 Supplementary marking 14
8.2.1 Technical instructions for the installer 15
Annex ZA (informative) 15

2

---------------------- Page: 4 ----------------------

SIST EN 656:2001/A1:2006
EN 656:1999/A1:2006 (E)
Foreword
This document (EN 656:1999/A1:2006) has been prepared by Technical Committee CEN/TC109 “Central
heating boilers using gaseous fuels”, the secretariat of which is held by NEN.
This Amendment to the European Standard EN 656:1999 shall be given the status of a national standard, either
by publication of an identical text or by endorsement, at the latest by January 2007, a
...

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Amendment for the addition of ecodesign requirements (Regulation No 813/2013)
and energy labelling requirements (Regulation No 811/2013)
This European Standard specifies the common requirements and test methods concerning, in particular the construction, safety, fitness for purpose, and rational use of energy, 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, according to CEN/TR 1749:2014:
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 heat transfer fluid does not exceed 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 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”
f)   which are intended to be installed inside a building or in a partially protected place;
g)   which are intended to produce hot water either by the instantaneous or storage principle, the whole being marketed as a single unit.
This European Standard applies to boilers designed for sealed water systems or for open water systems.
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.

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