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

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."

Heizkessel - Teil 3 : Zentralheizkessel für gasförmige Brennstoffe - Zusammenbau aus Kessel und Gebläsebrenner

Der zweite Absatz wird durch den nachstehenden Text ersetzt:
"Diese Europäische Norm legt die Anforderungen für Standardheizkessel und Niedertemperatur-Heizkessel  mit einer Nennwärmebelastung bis 1 000 kW und mit einer Wassertemperatur, die bei normalen Betriebsbedingungen 105°C nicht übersteigt, fest.
Der zweite Spiegelstrich des dritten Absatzes wird durch den nachstehenden Text ersetzt:
"- Brennwertgeräte;"
Der vorletzte Absatz der EN 303-3 ist zu streichen:
"Diese Europäische Norm beinhaltet nur einige notwendige Anforderungen an Niedertemperatur-Heizkessel. Die in dieser Europäischen Norm definierten Versuchsmethoden für die Bestimmung der Wirkungsgrade können trotzdem nach Anpassung gemäß Anhang H für Niedertemperatur-Heizkessel Anwendung finden."

Chaudieres de chauffage - Partie 3 : Chaudieres de chauffage central utilisant les combustibles gazeux - Assemblage d'un corps de chaudiere et d'un bruleur a air soufflé

Remplacer le deuxieme alinéa par le texte suivant :
"La présente Norme européenne s'applique aux chaudieres standard et aux chaudieres basse température de puissance utile nominale inférieure ou égale a 1 000 kW dont la température normale de service ne dépasse pas 105 °C."
Remplacer le 2eme tiret du 3eme paragraphe par le texte suivant :
"- les chaudieres a condensation ;"
Supprimer dans l'EN 303-3 l'avant-dernier paragraphe :
"La présente Norme européenne ne contient pas toutes les exigences nécessaires pour les chaudieres a basse température. Cependant, les méthodes d'essai définies par la présente Norme européenne pour la détermination des rendements utiles peuvent etre utilisées pour les chaudieres a basse température, apres les avoir adaptées conformément a l'Annexe H."

Kotli za ogrevanje - 3. del: Plinski kotli za ogrevanje – Sestav kotla in gorilnika s prisilnim vlekom - Dopolnilo A2

General Information

Status
Published
Publication Date
31-May-2004
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Jun-2004
Due Date
01-Jun-2004
Completion Date
01-Jun-2004

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Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 303-3:1999/A2:2004
01-junij-2004

Kotli za ogrevanje - 3. del: Plinski kotli za ogrevanje – Sestav kotla in gorilnika s

prisilnim vlekom - Dopolnilo A2

Heating Boilers - Part 3 : Gas-fired heating boilers - Assembly comprising a boiler body

and a forced draught burner

Heizkessel - Teil 3 : Zentralheizkessel für gasförmige Brennstoffe - Zusammenbau aus

Kessel und Gebläsebrenner

Chaudieres de chauffage - Partie 3 : Chaudieres de chauffage central utilisant les

combustibles gazeux - Assemblage d'un corps de chaudiere et d'un bruleur a air soufflé

Ta slovenski standard je istoveten z: EN 303-3:1998/A2:2004
ICS:
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
97.100.20 Plinski grelniki Gas heaters
SIST EN 303-3:1999/A2:2004 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 303-3:1999/A2:2004
---------------------- Page: 2 ----------------------
SIST EN 303-3:1999/A2:2004
EUROPEAN STANDARD
EN 303-3:1998/A2
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2004
ICS 91.140.10
English version
Heating Boilers - Part 3 : Gas-fired heating boilers - Assembly
comprising a boiler body and a forced draught burner

Chaudières de chauffage - Partie 3 : Chaudières de Heizkessel - Teil 3 : Zentralheizkessel für gasförmige

chauffage central utilisant les combustibles gazeux - Brennstoffe - Zusammenbau aus Kessel und

Assemblage d'un corps de chaudière et d'un brûleur à air Gebläsebrenner
soufflé

This amendment A2 modifies the European Standard EN 303-3:1998; it was approved by CEN on 3 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 303-3:1998/A2:2004: E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 303-3:1999/A2:2004
EN 303-3:1998/A2:2004 (E)
Foreword

This document (EN 303-3:1998/A2:2004) has been prepared by Technical Committee CEN/TC 109 " Central

heating boilers using gaseous fuels ", the secretariat of which is held by NEN.

This Amendment to the European Standard EN 303-3:1998 shall be given the status of a national standard, either

by publication of an identical text or by endorsement, at the latest by October 2004, and conflicting national

standards shall be withdrawn at the latest by October 2004.

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).

WARNING : other requirements and other EU Directives may be applicable to the products falling within the scope

of this European Standard.

For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,

Slovakia, Spain, Sweden, Switzerland and the United Kingdom.

NOTE once constructional requirements for low-temperature boilers have been included within EN 303-1 they will replace the

constructional requirements of this amendment,

amendment A1 to European Standard EN 303-3 does not exist. The draft worked out under the reference EN 303-

3:1998/prA1 is now referenced prEN 303-7.
---------------------- Page: 4 ----------------------
SIST EN 303-3:1999/A2:2004
EN 303-3:1998/A2:2004 (E)
Contents
Delete annex H.
1 Scope
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 2 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."

3 Definitions
Add:
3.8
condensate
liquid formed from the combustion products during the condensation process
3.9
standard boiler
boiler for which the average water temperature can be restricted by design
3.10
low-temperature boiler

boiler which can work continuously with a water supply temperature of 35 °C to 40 °C, possibly producing

condensation in certain circumstances"
4.1 General principles
At the end of the clause, add:

“For low-temperature boilers, all parts of the heat exchanger(s) and other parts of the boiler likely to come into

contact with condensate shall be constructed of sufficiently corrosion resistant materials or materials protected by a

suitable coating in order to ensure a reasonable life for a boiler that is installed, used and maintained in accordance

with the manufacturer's instructions.

Surfaces in contact with condensate (except purpose provided drains, water traps and siphons) shall be designed

to prevent condensate retention.”
Add the following clause:
---------------------- Page: 5 ----------------------
SIST EN 303-3:1999/A2:2004
EN 303-3:1998/A2:2004 (E)
4.4 Condensate discharge for low-temperature boilers

For low-temperature boilers, a means of condensate discharge shall be provided if the condensate:

 impairs safety or correct operation;
 results in spillage from the appliance;
 causes deterioration of materials.

A pipe or pipes shall be used to discharge condensate when this is necessary. The internal diameter of the outside

connection of the condensate discharge system shall be at least 13 mm.

The disposal system, forming part of the boiler or supplied with the boiler, shall be such that:

 it can be easily inspected and cleaned in accordance with the manufacturer's instructions;

 it cannot transmit combustion products into the room where the boiler is installed; this requirement is satisfied if

the disposal system incorporates a water trap;
 a water tr
...

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