Thermal energy meters - Part 6: Installation, commissioning, operational monitoring and maintenance

This European Standard specifies commissioning, operational monitoring and maintenance and applies to 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 heat in legal units.
Electrical safety requirements are not covered by this European Standard.
Pressure safety requirements are not covered by this European Standard.
Surface mounted temperature sensors are not covered by this European Standard.
This standard covers meters for closed systems only, where the differential pressure over the thermal load is limited.

Thermische Energiemessgeräte - Teil 6: Einbau, Inbetriebnahme, Überwachung und Wartung

Diese Europäische Norm gilt für !thermische Energiemessgeräte" und legt die Inbetriebnahme, die Überwachung und die Wartung von diesen fest. !Thermische Energiemessgeräte" sind Geräte, die dazu dienen, die Energiemenge zu messen, die in einem Wärmeübertragerkreislauf durch eine als Wärmeträgerflüssigkeit bezeichnete Flüssigkeit aufgenommen (Kühlen) oder abgegeben (Heizen) wird. Das !thermische Energiemessgerät" zeigt die Wärmemenge in gesetzlichen Einheiten an.
Elektrische Sicherheitsanforderungen werden in dieser Europäischen Norm nicht behandelt.
Den Druck betreffende Sicherheitsanforderungen werden in dieser Europäischen Norm nicht behandelt.
Oberflächenmontierte Temperaturfühler werden in dieser Europäischen Norm nicht behandelt.
Die vorliegende Norm behandelt ausschließlich Zähler für geschlossene Systeme, in denen der Differenz-druck über die Wärmemenge begrenzt ist.

Compteurs d'énergie thermique - Partie 6 : Installation, mise en service, surveillance et maintenance

La présente Norme européenne spécifie l'installation, la mise en service, à la surveillance de fonctionnement et la maintenance et s'applique 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.
La présente Norme européenne ne traite pas des prescriptions de sécurité électrique.
La présente Norme européenne ne traite pas des prescriptions de sécurité relative à la pression.
La présente Norme européenne ne traite pas des sondes de température montées en surface.
La présente norme couvre les compteurs pour les systèmes fermés uniquement, où la pression différentielle dans la charge thermique est limitée.

Merilniki toplote - 6. del: Vgradnja, zagon, nadzor in vzdrževanje (vključno z dopolnilom A1)

Ta evropski standard določa zagon, nadzor delovanja in vzdrževanje ter se uporablja za merilnike toplotne energije. 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 toploto v predpisanih enotah.
Ta evropski standard ne zajema električnih varnostnih zahtev.
Ta evropski standard ne zajema tlačnih varnostnih zahtev.
Ta evropski standard ne zajema površinsko nameščenih senzorjev temperature.
Ta standard zajema samo števce za zaprte sisteme, kjer je diferencialni tlak nad toplotno obremenitvijo omejen.

General Information

Status
Published
Publication Date
12-Feb-2019
Current Stage
9000 - Start of review/2 Year Review Enquiry - Review Enquiry
Due Date
04-Nov-2020
Completion Date
04-Nov-2020

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Thermische Energiemessgeräte - Teil 6: Einbau, Inbetriebnahme, Überwachung und WartungCompteurs d'énergie thermique - Partie 6 : Installation, mise en service, surveillance et maintenanceThermal energy meters - Part 6: Installation, commissioning, operational monitoring and maintenance17.200.10Toplota. KalorimetrijaHeat. CalorimetryICS:Ta slovenski standard je istoveten z:EN 1434-6:2015+A1:2019SIST EN 1434-6:2016+A1:2019en,fr,de01-april-2019SIST EN 1434-6:2016+A1:2019SLOVENSKI

STANDARDSIST EN 1434-6:20161DGRPHãþD
SIST EN 1434-6:2016+A1:2019
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1434-6:2015+A1
February
t r s { ICS
s yä t r rä s r Supersedes EN
s v u væ xã t r s wEnglish Version
Thermal energy meters æ Part

xã Installationá commissioningá operational monitoring and maintenanceCompteurs d 5énergie thermique æ Partie

x ã Installationá mise en serviceá surveillance et maintenance
Thermische Energiemessgeräte æ Teil

xã Einbauá Inbetriebnahmeá Überwachung und Wartung This European Standard was approved by CEN on

w September
t r s w and includes Amendment
s approved by CEN on
w February
t r s zä

egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä

translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels

t r s { CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN

s v u væ xã t r s w ªA sã t r s { ESIST EN 1434-6:2016+A1:2019

EN 1434-6:2015+A1:2019 (E) 2 Contents Page European foreword ....................................................................................................................................................... 3 1 Scope .................................................................................................................................................................... 4 2 Normative references .................................................................................................................................... 4 3 Terms and definitions ................................................................................................................................... 4 4 Requirements ................................................................................................................................................... 5 4.1 Design requirements ..................................................................................................................................... 5 4.2 Installation requirements ............................................................................................................................ 6 4.3 !Thermal energy meter" commissioning ...................................................................................... 7 4.3.1 General ................................................................................................................................................................ 7 4.3.2 Certification check .......................................................................................................................................... 7 4.3.3 Installation check ............................................................................................................................................ 7 4.3.4 !Thermal energy meter" security .................................................................................................... 7 Annex A (informative)

!Thermal energy meter" installation ............................................................. 8 Annex B (informative)

!Thermal energy meter" operational monitoring and maintenance................................................................................................................................................... 18 Annex C (informative)

Suggested gauge for checking the dimensions of installed temperature sensor pockets .................................................................................................................... 21 Annex ZA (informative)

Relationship between this European Standard and the essential requirements of Directive 2014/32/EU aimed to be covered ..................................................... 22 Bibliography ................................................................................................................................................................. 23

SIST EN 1434-6:2016+A1:2019

EN 1434-6:2015+A1:2019 (E) 3 European foreword This document (EN 1434-6:2015+A1:2019) has been prepared by Technical Committee CEN/TC 176 “Thermal energy meters”, the secretariat of which is held by SIS. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2019, and conflicting national standards shall be withdrawn at the latest by August 2019. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document includes Amendment 1 approved by CEN on 5 February 2018.

This document supersedes !EN 1434-6:2015". The start and finish of text introduced or altered by amendment is indicated in the text by tags !". 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. For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document. EN 1434, Thermal energy meters consists of the following parts: — Part 1: General requirements — Part 2: Constructional requirements — Part 3: Data exchange and interfaces1) — Part 4: Pattern approval tests — Part 5: Initial verification tests — Part 6: Installation, commissioning, operational monitoring and maintenance In comparison to EN 1434-6:2007, the following changes have been made: — special cases for combined !thermal energy meters" are added; — additional functionalities for smart metering applications are added; — installation requirements added for !thermal energy meters" which are located next to cables like data communication cables and mains supply cables; — installation requirement changed for 4-wire connections; — cooling meters are added. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

1) EN 1434-3 is maintained by CEN/TC 294.
SIST EN 1434-6:2016+A1:2019

EN 1434-6:2015+A1:2019 (E) 4 1 Scope This European Standard specifies commissioning, operational monitoring and maintenance and applies to !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 heat in legal units. Electrical safety requirements are not covered by this European Standard. Pressure safety requirements are not covered by this European Standard. Surface mounted temperature sensors are not covered by this European Standard. This standard covers meters for closed systems only, where the differential pressure over the thermal load is limited. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. !EN 1434-1:2015+A1:2018, Thermal energy meters — Part 1: General requirements" 3 Terms and definitions For the purposes of this document, the terms and definitions given in !EN 1434-1:2015+A1:2018" and the following apply. !3.1 thermal energy system heating or cooling installations of the dwelling or premises, including the exchange circuit, the thermal energy meter, the associated fittings and the electrical equipment Note 1 to entry: The heating or cooling systems typically commences and finishes at the two connections to the heat or cooling mains. 3.2 thermal energy mains heat or cooling suppliers distribution pipes to which the consumer's installation is connected 3.3 inlet and outlet limbs pipes connecting the heating or cooling

system to the thermal energy mains 3.4 primary circuit circuit hydraulically connected to the thermal energy mains" 3.5 secondary circuit circuit hydraulically separated from the primary circuit SIST EN 1434-6:2016+A1:2019

EN 1434-6:2015+A1:2019 (E) 5 3.6 competent authority persons or organizations charged with the responsibility for the !thermal energy meter" and/or its installation 4 Requirements 4.1 Design requirements 4.1.1 When designing the !heating and cooling system", the !thermal energy meter" manufacturer meter specification and installation instructions shall be followed. For DN 40 and smaller, it is possible to use short direct sensors. To achieve good temperature sensitivity, direct sensors should be installed without temperature pockets. Temperature pockets should only be used when required for safety reasons. 4.1.2 To avoid unnecessary systematic error the temperature sensors shall be placed directly before and after the thermal load. If the differential pressure between the sensors is too high this systematic error might be too large. For typical systematic negative error as a function of differential pressure and temperature difference, see Table 1. Table 1 — Typical systematic negative error as a function of differential pressure and temperature difference Diff in bar Temperature difference in K

3 5 10 20 30 40 50 60 0,5 0,2 0,2 0,1 0,1 0,1 0 0 0 1 0,5 0,4 0,3 0,2 0,1 0,1 0,1 0,1 2 0,9 0,7 0,5 0,3 0,2 0,2 0,1 0,1 3 1,4 1,1 0,8 0,5 0,3 0,2 0,2 0,2 4 1,8 1,5 1,0 0,6 0,4 0,3 0,3 0,2 5 2,3 1,9 1,3 0,8 0,5 0,4 0,3 0,3 6 2,7 2,2 1,5 0,9 0,6 0,5 0,4 0,3 7 3,2 2,6 1,9 1,1 0,7 0,6 0,5 0,4 8 3,6 3,0 2,0 1,2 0,9 0,7 0,5 0,4 9 4,1 3,3 2,3 1,4 1,0 0,7 0,6 0,5 10 4,5 4,0 2,5 1,5 1,1 0,8 0,7 0,5 The values are shown as fraction of the maximum permissible error for the calculator. The values below the marked line are higher than 1/3rd of the maximum permissible error for the heat calculator. If the resulting error is higher than 1/3rd of the maximum permissible error, it is recommended to change the installation to have smaller differential pressure. NOTE In cases where flows from two different loads with different temperatures (e.g. for space heating and domestic warm water) are merged together just before the temperature sensor, the optimum position for the sensor is after the flow sensor. SIST EN 1434-6:2016+A1:2019

EN 1434-6:2015+A1:2019 (E) 6 4.1.3 For bifunctional meters for change-over systems between heating and cooling additional requirements are necessary to ensure the correct switching over function between the heating and cooling register. These requirements are: — the lowest operating temperature in the inlet pipe at heating conditions shall be at least 3 °C higher than any specified optional switching over temperature hc, — the highest operating temperature in the inlet pipe at cooling conditions shall be at least 3 °C lower than any specified optional switching over temperature hc, — the minimum temperature difference in heating and cooling application shall be more than 3 K. NOTE The above mentioned temperature range of at least 3 °C covers the maximum accepted uncertainty in absolute temperature and the cable resistance. A temperature sensor with smaller tolerances than 2 °C for measuring absolute temperature is recommended. 4.2 Installation requirements The !thermal energy meter" shall be installed in accordance with the manufacturer's instructions. Before installation, the circuit into which the flow sensor is to be installed shall be thoroughly flushed to remove debris. The strainer, where fitted, shall be cleaned. The !thermal energy meter" shall be protected from the risk of damage by shock and vibration induced by the surroundings at the place of installation. The !thermal energy meter" shall not be subjected to undue stresses caused by pipes and fittings. The pipe lines of the heating system up and downstream of the !thermal energy meter" shall be adequately anchored. !Thermal energy meters" designed to operate from an AC mains supply shall be wired in accordance with wiring regulations applicable. The AC mains power supply shall be secured against accidental interruption. However, circuit protection shall be incorporated according to the state of the art, to safely disconnect the device when electrical problems occur. Measurement signal leads shall not be laid directly alongside other leads such as mains supply cables, low voltage supply cables and data communication cables and shall be independently supported. The separation between those groups shall not be less than 50 mm. Unless the calculator under installation was type tested according to the latest version of EN 1434-4, it is recommended to install cables and calculators with a distance of at least 60 cm to strong electromagnetic fields, e.g. frequency controlled pumps and similar high energy mains cables. Mains and external signal cables longer than 10 m shall in areas where lightning is frequent be protected with an external lightning surge protection at the cable entrance to the building. Each signal lead between temperature sensors and calculator shall be one continuous length without joints except 4-wire connection solutions which are approved. Signal circuits between parts of a !thermal energy meter" shall be so installed as to deter unauthorized interference and disconnection. Precautions shall be taken to prevent damage to the !thermal energy meter" by unfavourable hydraulic conditions (cavitation, surging, water hammer). SIST EN 1434-6:2016+A1:2019

EN 1434-6:2015+A1:2019 (E) 7 When the installation of the heat and cooling meters is complete, it shall be inspected and approved by representatives of the competent authority in accordance with established procedures and the inspection shall be documented. Installation shall be done according to national legislation on legal metrology. 4.3 !Thermal energy meter" commissioning 4.3.1 General The responsibility for the carrying out of each of the inspection phases is not necessarily restricted to one person or one authority depending on the national legislation on legal metrology, but however arranged, the following points shall be addressed and responsibilities defined. 4.3.2 Certification check Before commissioning commences it shall be ascertained firstly, that the correct !thermal energy meter" has been installed by comparing the !thermal energy meter" manufacturer's type and size designation against the system specification. Secondly, it shall be checked that the !thermal energy meter", if a complete instrument, bears the correct pattern approval mark and, if a combined instrument, that each of the meters sub-assemblies bear the pattern approval marks stipulated in the pattern approval document for the !thermal energy meter" installed. 4.3.3 Installation check At least the following points shall be checked: — Is the flow sensor mounted in the correct position and with the correct flow direction? — Does the temperature sensor fit correctly into the pocket (pockets shorter than 140 mm shall be marked "EN 1434" or dimensions checked)? — Are the temperature sensors correctly installed? — Is the !thermal energy meter" installed at a safe distance from sources of electromagnetic interference (switchgear, electric motors, fluorescent lights)? — Where called for, has the !thermal energy meter" been correctly earthed? — The specified protection class (IP) has to be ensured: Is every cable diameter within the minimum and maximum diameter as specified by the manufacturer? — Are the gaskets dedicated to the application (e.g. temperature range, pressure, durability, medium)? — Are the accessories correctly installed according to the installation instructions of the manufacturer and operator? — Is the !thermal energy meter" seen to be fun

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