EN 1434-1:2022

Thermal energy meters - Part 1: General requirements

This document is applicable for the general requirements for thermal energy meters. Thermal energy meters are instruments intended for measuring the energy which in a heat-exchange circuit is absorbed (cooling) or given up (heating) by a liquid called the heat-conveying liquid. The thermal energy meter indicates the quantity of thermal energy in legal units.
This document covers meters for closed systems only, where the differential pressure over the thermal load is limited.
This document is not applicable to:
-   electrical safety requirements;
-   pressure safety requirements; and
-   surface mounted temperature sensors.

Thermische Energiemessgeräte - Teil 1: Allgemeine Anforderungen

Dieses Dokument ist auf die allgemeinen Anforderungen für thermische Energiemessgeräte anwendbar. Thermische Energiemessgeräte sind Geräte zum Messen der Energiemenge, die in einem Wärmeübertragerkreislauf von einer Flüssigkeit, der sogenannten Wärmeträgerflüssigkeit, absorbiert (Kühlung) oder abgegeben (Heizung) wird. Das thermische Energiemessgerät zeigt die Menge der thermischen Energie in gesetzlichen Einheiten an.
Dieses Dokument ist lediglich auf Messgeräte für geschlossene Systeme anwendbar, bei denen der Differenzdruck über die thermische Last begrenzt ist.
Dieses Dokument ist nicht anwendbar für:
—   Anforderungen an die elektrische Sicherheit;
—   Anforderungen an die Drucksicherheit;
—   oberflächenmontierte Temperaturfühler.

Compteurs d'énergie thermique - Partie 1 : Prescriptions générales

Le présent document est applicable aux prescriptions générales relatives aux compteurs d’énergie thermique. Les compteurs d’énergie thermique sont des instruments destinés à mesurer l’énergie thermique qui, dans un circuit d’échange thermique, est absorbée (refroidissement) ou cédée (chauffage) par un liquide appelé « liquide caloporteur ». Le compteur d’énergie thermique fournit la quantité d’énergie thermique en unités de mesure légales.
Le présent document couvre les compteurs pour les systèmes fermés uniquement, où la pression différentielle dans la charge thermique est limitée.
Le présent document ne s’applique pas :
-   aux prescriptions de sécurité électrique ;
-   aux prescriptions de sécurité relatives à la pression ; ni
-   aux sondes de température montées en surface.

Merilniki toplote - 1. del: Splošne zahteve

Ta dokument določa splošne zahteve za merilnike toplote. Merilniki toplote so instrumenti, namenjeni merjenju energije, ki jo v krogotoku toplotne izmenjave absorbira (hlajenje) ali oddaja (ogrevanje) tekočina, imenovana tekočina za prenos toplote. Merilnik toplote podaja količino toplote v predpisanih enotah.
Ta dokument ne zajema zahtev za električno varnost.
Ta dokument ne zajema tlačnih varnostnih zahtev.
Ta dokument ne zajema površinsko nameščenih senzorjev temperature.
Ta dokument zajema samo števce za zaprte sisteme, pri katerih je diferencialni tlak nad toplotno obremenitvijo omejen.

General Information

• Status: Published
• Publication Date: 06-Sep-2022
• ICS: 17.200.20 - Temperature-measuring instruments
• Technical Committee: CEN/TC 176 - Heat meters
• Drafting Committee: CEN/TC 176/WG 2 - Heat Meters - Requirements, test methods and technical editing
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 07-Sep-2022
• Due Date: 22-Nov-2021
• Completion Date: 07-Sep-2022
• Directive: 2014/32/EU - Directive 2014/32/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of measuring instruments
• Mandate: M/541 - [C(2015)8558] Standardization request in support of the implementation of Directive 2014/32/EU on measuring instruments
• Ref Project: SIST EN 1434-1:2022 - Thermal energy meters - Part 1: General requirements

Relations

• Replaces: EN 1434-1:2015+A1:2018 - Thermal energy meters - Part 1: General requirements
• Effective Date: 14-Sep-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2022
Nadomešča:
SIST EN 1434-1:2016+A1:2019
Merilniki toplote - 1. del: Splošne zahteve
Thermal energy meters - Part 1: General requirements
Thermische Energiemessgeräte - Teil 1: Allgemeine Anforderungen
Compteurs d'énergie thermique - Partie 1 : Prescriptions générales
Ta slovenski standard je istoveten z: EN 1434-1:2022
ICS:
17.200.20 Instrumenti za merjenje Temperature-measuring
temperature instruments
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 1434-1
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2022
EUROPÄISCHE NORM
ICS 17.200.20 Supersedes EN 1434-1:2015+A1:2018
English Version
Thermal energy meters - Part 1: General requirements
Compteurs d'énergie thermique - Partie 1 : Thermische Energiemessgeräte - Teil 1: Allgemeine
Prescriptions générales Anforderungen
This European Standard was approved by CEN on 17 July 2022.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard 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 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.
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 1434-1:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Types of instruments . 12
4.1 General. 12
4.2 Complete instrument . 12
4.3 Combined instrument . 12
4.4 Hybrid instrument . 12
4.5 Sub-assemblies of a thermal energy meter, which is a combined instrument . 12
4.5.1 General. 12
4.5.2 Flow sensor . 12
4.5.3 Temperature sensor pair . 12
4.5.4 Calculator . 12
4.6 Equipment under test (EUT) . 13
5 Rated operating conditions . 13
5.1 Limits of temperature range . 13
5.2 Limits of temperature differences . 13
5.3 Limits of flow rate . 13
5.4 Limit of thermal power . 13
5.5 Limits of working pressure (PS and P ) . 14
min
5.6 Nominal pressure (PN) . 14
5.7 Limits in ambient temperature . 14
5.8 Limits in deviations in supply voltage . 14
5.9 Maximum pressure loss . 14
5.10 Specific requirements on registration devices . 14
5.10.1 General. 14
5.10.2 Suitability . 14
5.10.3 Rated operated conditions . 15
5.10.4 Indication . 15
5.10.5 MPE for additional functionalities (smart metering functionality) . 16
6 Technical characteristics . 16
6.1 Materials and construction . 16
6.2 Requirements outside the limiting values of the flow rate . 17
6.3 Display . 17
6.4 Protection against fraud . 18
6.5 Supply voltage . 18
6.6 Effect on temperature sensor pairs by mounting in pockets . 18
6.7 Reproducibility . 18
6.8 Repeatability . 19
6.9 Software . 19
7 Specified working range . 19
7.1 General . 19
7.2 Temperature difference . 19
7.3 Flow rate . 19
8 Heat transmission formula . 19
9 Metrological characteristics (Maximum Permissible Error, MPE) . 20
9.1 General . 20
9.2 Values of maximum permissible errors . 20
9.2.1 Maximum permissible relative errors of complete thermal energy meters. 20
9.2.2 Maximum permissible relative error of sub-assemblies . 21
9.3 Application of maximum permissible errors . 21
10 Environmental classification . 22
10.1 General . 22
10.2 Environmental class A (Domestic use, indoor installations) . 22
10.3 Environmental class B (Domestic use, outdoor installations) . 22
10.4 Environmental class C (Industrial installations) . 22
10.5 Mechanical classes M1 to M3 . 22
11 Thermal energy meter specification . 23
11.1 General . 23
11.2 Flow sensor . 23
11.3 Temperature sensor pair . 24
11.4 Calculator . 25
11.5 Complete meters . 26
12 Information to be made available by the manufacturer or supplier . 28
12.1 Installation instructions . 28
12.2 Parameter setting instructions. 29
12.3 Adjustment instructions . 30
12.4 Maintenance instructions . 30
12.5 Information required when a thermal energy meter is taken out of service for
recycling and/or disposal . 31
12.5.1 General . 31
12.5.2 Disassembly . 31
12.5.3 Recycling . 31
12.5.4 Disposal . 31
Annex A (normative) Heat coefficient formulae . 32
A.1 Water . 32
A.2 Heat-conveying liquids other than water . 34
Annex B (normative) Flow conditioner package .
...