EN 835:1994
(Main)Heat cost allocators for the determination of the consumption of room heating radiators - Appliances without an electrical energy supply, based on the evaporation principle
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- 18-Oct-1994
- 91.140.10
- CEN/TC 171
Heat cost allocators for the determination of the consumption of room heating radiators - Appliances without an electrical energy supply, based on the evaporation principle
Heat cost allocators in accordance with this standard are instruments for the registration of the heat output of radiators in consumer units. Consumer units are dwellings, office buildings, business premises, industrial plants in which the heat is supplied by a common central heating systems or by a common district heating connection. A complete grouping of consumer units is called an account unit.
Heizkostenverteiler für die Verbrauchswerterfassung von Raumheizflächen - Geräte ohne elektrische Energieversorgung nach dem Verdunstungsprinzip
Heizkostenverteiler nach dieser Norm sind Instrumente zur Erfassung der Wärmeabgabe von Heizkörpern in Nutzeinheiten. Unter Nutzeinheiten sind Wohnungs-, Büro-, Geschäfts-, Gewerbe- oder Industrieräumlichkeiten zu verstehen, deren Wärmeversorgung durch eine gemeinsame Zentralheizunsanlage oder über einen gemeinsamen Fernwärmeanschluß erfolgt. Die Gesamtheit der Nutzeinheiten bildet eine Abrechnungseinheit.
Répartiteurs de frais de chauffage pour enregistrer les valeurs de consommation de surfaces de corps de chauffe - Appareils sans alimentation en énergie électrique en vertu du principe d'évaporation
Les répartiteurs de frais de chauffage conformes à cette norme sont des instruments destinés à mesurer la chaleur émise par des radiateurs dans les unités d'utilisation. On entend par unités d'utilisation des locaux d'habitation, des locaux commerciaux, professionnels ou industriels et des bureaux, dont l'approvisionnement en chaleur se fait au moyen d'une installationde chauffage central ou par le truchement d'un raccordement commun à un système de chauffage urbain. L'ensemble des unités d'utilisation constitue une unité de calcul des frais.
Delilniki stroškov porabe toplote ogreval – Naprave brez električnega napajanja na osnovi izhlapevanja
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Heizkostenverteiler für die Verbrauchswerterfassung von Raumheizflächen - Geräte ohne elektrische Energieversorgung nach dem VerdunstungsprinzipRépartiteurs de frais de chauffage pour enregistrer les valeurs de consommation de surfaces de corps de chauffe - Appareils sans alimentation en énergie électrique en vertu du principe d'évaporationHeat cost allocators for the determination of the consumption of room heating radiators - Appliances without an electrical energy supply, based on the evaporation principle91.140.10Sistemi c
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NOTE See Clause 3 for a definition of the terms used below.
This European standard applies to heat cost allocators which are used to capture the proportionate thermal output of radiators in consumer units.
If an account unit comprises consumer units of different types (e.g. technically different types of heating systems or differences due to the consumer behaviour, e.g. industrial plants as opposed to private apartments), it could be necessary to divide this account unit into groups of users.
Heat cost allocators enable the determination of the heat consumption only of each radiator in a consumer unit as a share of the total heat consumption of the account unit or user group (see Clause 4); it is therefore necessary to determine this total heat consumption either by measuring the consumed fuel quantity or the amount of heat delivered (the latter by means of a heat meter, for example).
For the appropriate use of the heat cost allocators in accordance with this standard, the heating system needs to:
- correspond to the state of the art at the time of installation of the heat cost allocators;
- be operated in accordance with the state of the art (see A.2).
This standard specifies that heat cost allocators shall not be used for heating systems where the temperature of the heating system falls below or exceeds the temperature limits of the heat cost allocators, where the rating factor for the thermal output, KQ, cannot be clearly specified or where the heating surface is inaccessible. This applies usually to the following heating systems:
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ag) modular boilers;
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Scope of CEN/TS 15502-3-1
EN 15502-2-1:2022, Clause 1 applies with the following modifications:
Add after k):
l) which are fully premixed appliances equipped with an Adaptive Combustion Control Function (ACCF) 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 including gas grids for natural gases of the second family where up to 20% hydrogen volume is added to the natural gas (H2NG-Y20).
m) which are fully premixed appliances equipped with a Pneumatic Gas Air Ratio controller (PGAR) that are intended to be connected to gas grids for natural gases of the second family where up to 20% hydrogen volume is added to the natural gas (H2NG-Y20), where the quality of the distributed gas without adding the hydrogen is not likely to vary to a large extent over the lifetime of the appliance.
Replace ab) and ak) and al) by the following:
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ak) appliances that are intended to burn natural gases of the second family where hydrogen is added to the natural gas, except for fully premixed appliances with a ACCF or PGAR (which are covered by this document);
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This document is intended to be used in conjunction with EN 15502-1:2021.
This document covers gas-fired central heating boilers from the types C1 up to C(11) and the types B2, B3 and B5:
NOTE 1 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 1 000 kW;
b) that use one or more combustible gases of the three gas families at the pressures stated in EN 437:2021;
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 can give rise to condensation under certain circumstances;
f) which are declared in the instructions for installation 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 inside a building or in a partially protected place;
h) which are intended to produce also hot water either by the instantaneous or storage principle 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.
k) which are from the types C(10) that are equipped with a gas-air ratio control and that have a ∆pmax, saf(min) of 25 Pa, and C(11) that have condensing boiler modules that are equipped with a gas-air ratio control and that have a ∆pmax, saf(min) of 25 Pa.
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af) appliances incorporating flexible plastic flue liners;
ag) C(10) boilers:
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2) which are non-condensing appliances, or
3) which have a maximum safety pressure difference at minimum heat input not equal to 25 Pa (∆pmax, saf(min));
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NOTE For further background information on appliance types see CEN/TR 1749:2014 [1].
a) that use one or more combustible gases of the three gas families at the pressures stated in EN 437;
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NOTE The Ecodesign Directive defines "other boilers", "low temperature boilers" and "condensing boilers". The Boiler Efficiency Directive defines "standard boilers", "low temperature boilers" and "condensing boilers". Depending on the legislation applied, a boiler can be both "a standard boiler" and an "other boiler"."
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An example of an assessment methodology, based upon risk assessment, is given in Clause 11.
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