SIST EN 303-6:2019/oprA1:2022

SLOVENSKI STANDARD
01-december-2022
Kotli za gretje - 6. del: Kotli z ventilatorskimi gorilniki - Posebne zahteve za
delovanje in energijske lastnosti grelnikov sanitarne vode in kombiniranih kotlov z
razprševalnimi oljnimi gorilniki z nazivno močjo do vključno 70 kW - Dopolnilo A1
Heating boilers - Part 6: Heating boilers with forced draught burners - Specific
requirements for the domestic hot water operation and energy performance of water
heaters and combination boilers with atomizing oil burners of nominal heat input not
exceeding 70 kW
Heizkessel - Teil 6: Heizkessel mit Gebläsebrennern - Spezielle Anforderungen an die
trinkwasserseitige Funktion und energetische Bewertung von Wassererwärmern und von
Kombi-Kesseln mit Ölzerstäubungsbrennern mit einer Nennwärmeleistung kleiner als
oder gleich 70 kW
Chaudières de chauffage - Partie 6 : Chaudières avec brûleurs à air soufflé - Exigences
spécifiques à la fonction eau chaude sanitaire et à la performance énergétique des
préparateurs d'eau chaude et des chaudières à deux services avec brûleurs fioul à pu
Ta slovenski standard je istoveten z: EN 303-6:2019/prA1
ICS:
27.060.30 Grelniki vode in prenosniki Boilers and heat exchangers
toplote
91.140.65 Oprema za ogrevanje vode Water heating equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
EN 303-6:2019
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
November 2022
ICS
English Version
Heating boilers - Part 6: Heating boilers with forced
draught burners - Specific requirements for the domestic
hot water operation and energy performance of water
heaters and combination boilers with atomizing oil
burners of nominal heat input not exceeding 70 kW
Chaudières de chauffage - Partie 6 : Chaudières avec Heizkessel - Teil 6: Heizkessel mit Gebläsebrennern -
brûleurs à air soufflé - Exigences spécifiques à la Spezielle Anforderungen an die trinkwasserseitige
fonction eau chaude sanitaire et à la performance Funktion und energetische Bewertung von
énergétique des préparateurs d'eau chaude et des Wassererwärmern und von Kombi-Kesseln mit
chaudières à deux services avec brûleurs fioul à pu Ölzerstäubungsbrennern mit einer
Nennwärmeleistung kleiner als oder gleich 70 kW
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 57.

This draft amendment A1, if approved, will modify the European Standard EN 303-6:2019. If this draft becomes an amendment,
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.

This draft amendment was established by CEN 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 CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 303-6:2019/prA1:2022 E
worldwide for CEN national Members.

EN 303-6:2019/prA1:2022 (E)
Contents
European foreword . 3
1 Modification in Clause 6 . 4
2 Modification in Clause 8 . 4
3 Modification in Clause 10 . 5
4 Modification in annexes . 5
Annex ZA (informative) Relationship between this European Standard and the ecodesign
requirements of Commission Regulation (EU) No 814/2013 [OJ L 239, 6.9.2013]
aimed to be covered . 6
Annex ZB (informative) Relationship between this European Standard and the energy
labelling requirements of Commission Regulation (EU)No 812/2013 [OJ L 239,
6.9.2013] aimed to be covered . 7
Annex ZC (informative) Relationship between this European Standard and the ecodesign
requirements of Commission Regulation (EU) No 813/2013 [OJ L 239, 6.9.2013]
aimed to be covered . 8
Annex ZD (informative) Relationship between this European Standard and the energy
labelling requirements of Commission Regulation (EU) No 811/2013 [OJ L 239,
6.9.2013] aimed to be covered . 9

EN 303-6:2019/prA1:2022 (E)
European foreword
This document (EN 303-6:2019/prA1:2022) has been prepared by Technical Committee CEN/TC 57
“Central heating boilers”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, ZB, ZC and ZD, which is
an integral part of EN 303-6:2019.
EN 303-6:2019/prA1:2022 (E)
1 Modification in Clause 6
In 6.3.2.2.3, after the 2nd indent paragraph
Replace the paragraph and Formula (1) by the following:
It is assumed that the mean water temperature (T ) of the tank at moment t is equal to the arithmetic
0 1
mean of the inlet and outlet temperatures at that moment:
TT+
e s
T = (1)
The preliminary conditions are met if this temperature T is equal to (65 ± 2) °C.
In 6.3.2.2.3, after Formula (5)
Replace the key with the following
q are the losses of the tank for a temperature rise of 45 K, in kilowatts (kW);
a45
t2 − t1 is the period of cooling, in hours (h);
T is the mean water temperature of the tank at moment t , in degrees Celsius (°C);
0 1
T is the corrected mean water temperature of the tank at moment t , in degrees Celsius (°C);
fc 2
Tamb is the mean ambient temperature during cooling, in degrees Celsius (°C);
V is the water capacity of the tank (including the water in any integral heat exchanger), in litres (l).
This value is declared by the manufacturer and checked from the drawings.
2 Modification in Clause 8
In 8.5, after Formula (16)
Replace the key with the following
Qelec,cor is the corrected total electrical energy, in kWh;
Qelec,m is the measured total electrical energy, in kWh;
D is the measured energy delivered to the water according to 5.3, in kWh;
H2O
D is the total delivered energy of used tapping cycle, value from Tables 1, 2, 3, 4, 5, 6 and, in kWh.
ref
In 8.6.3 after Formula (18)
Replace the key with the following
Qelec,cor,stby is the daily consumption of auxiliary energy in standby mode, in kWh;
Q is the auxiliary energy measured during the test in standby mode, in kWh;
elec,m
t is the duration of the test in hour (t = 1 h for the appliances without control cycle).
a a
8.7, after Formula (19)
Replace the key with the following
Q is the daily consumption of auxiliary energy in off mode, in kWh;
elec,cor,off
Q is the auxiliary energy measured during the test in off mode, in kWh.
elec,m,off
EN 303-6:2019/prA1:2022 (E)
3 Modification in Clause 10
Replace the title of Clause 10 and replace the first 5 paragraphs until first indent by the following:
10 Water heater parameters
10.1 Water heating energy efficiency
The water heating energy efficiency (η ), in %, expressed on GCV is calculated by:
wh
— for appliances without smart control:
Q
ref
η ⋅ 100
wh
Q +
...