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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

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;

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

Ajouter a la premiere liste de tirets :
-   de type standard pouvant donner lieu a 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Withdrawn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
31-Aug-2006
Withdrawal Date
12-Jun-2024
ICS
91.140.10 - Central heating systems
97.100.20 - Gas heaters
Technical Committee
PLN - Gas appliances for domestic use
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
12-Jun-2024
Due Date
05-Jul-2024
Completion Date
13-Jun-2024
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
2016/426 - 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
90/396/EEC - Appliances burning gaseous fuels
Ref Project
EN 656:1999/A1:2006 - Gas-fired central heating boilers - Type B boilers of nominal heat input exceeding 70 kW, but not exceeding 300 kW

Relations

Amends
SIST EN 656:2001 - Gas-fired central heating boilers - Type B boilers of nominal heat input exceeding 70 kW but not exceeding 300 kW
Effective Date
01-Sep-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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NOTE 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 70 kW;
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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 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.
h)   which are designed for either sealed water systems or for open water systems.
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).
NOTE 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 needs to be assessed.
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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 AB);
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;
r)   surface temperatures of external parts particular to children and elderly people;
s)   appliances that are intended to burn natural gases of the second family where hydrogen is added to the natural gass;
t)   boilers intended to be installed in areas accessible to elderly people and children.
NOTE   Negative pressure relative to the pressure in the flue system can for example be caused by mechanical or thermal ventilation in airtight buildings.

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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 15502-2-1:2012/FprA1

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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