SIST EN 1434-6:2007
(Main)Heat meters - Part 6: Installation, commissioning, operational monitoring and maintenance
Heat meters - Part 6: Installation, commissioning, operational monitoring and maintenance
This European Standard specifies installation, commissioning, operational monitoring and maintenance applicable to heat meters, that is to instruments intended for measur¬ing the heat which, in a heat-exchange circuit, is absorbed or given up by a liquid called the heat-conveying liquid. The heat 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.
Wärmezähler - Teil 6: Einbau, Inbetriebnahme, Überwachung und Wartung
Compteurs d'énergie thermique - Partie 6: Installation, mise en service, surveillance et maintenance
La présente Norme européenne spécifie les prescriptions applicables à l'installation, la mise en service, la surveillance de fonctionnement et la maintenance et s'applique aux compteurs d'énergie thermique, c'est à dire aux 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 exigences de sécurité électrique.
La présente Norme européenne ne traite pas des exigences de sécurité relative à la pression.
La présente Norme européenne ne traite pas des sondes de température montées en surface
Toplotni števci - 6. del: Vgradnja, zagon, nadzor in vzdrževanje
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Heat meters - Part 6: Installation, commissioning, operational monitoring and maintenanceToplotni števci - 6. del: Vgradnja, zagon, nadzor in vzdrževanjeCompteurs d'énergie thermique - Partie 6: Installation, mise en service, surveillance et maintenanceWärmezähler - Teil 6: Einbau, Inbetriebnahme, Überwachung und WartungTa slovenski standard je istoveten z:EN 1434-6:2007SIST EN 1434-6:2007en17.200.10Toplota. KalorimetrijaHeat. CalorimetryICS:SIST EN 1434-6:1997/A1:2002SIST EN 1434-6:19971DGRPHãþDSLOVENSKI
STANDARDSIST EN 1434-6:200701-maj-2007
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1434-6February 2007ICS 17.200.10Supersedes EN 1434-6:1997
English VersionHeat meters - Part 6: Installation, commissioning, operationalmonitoring and maintenanceCompteurs d'énergie thermique - Partie 6: Installation, miseen service, surveillance et maintenanceWärmezähler - Teil 6: Einbau, Inbetriebnahme,Überwachung und WartungThis European Standard was approved by CEN on 7 January 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1434-6:2007: E
EN 1434-6:2007 (E) 2 Contents Page 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.5 4.3 Heat meter commissioning.5 4.3.1 General.5 4.3.2 Certification check.6 4.3.3 Installation check.6 4.3.4 Heat meter security.6 Annex A (informative)
Heat meter installation.7 A.1 Introduction.7 A.2 Criteria for the selection of a heat meter.7 A.3 Quality of the heat conveying liquid.7 A.3.1 General.7 A.3.2 Primary water quality.8 A.3.3 Secondary water quality.8 A.4 Heat meter flow circuit design.8 A.5 Additional recommendations for cooling application.9 Annex B (informative)
Heat meter operational monitoring and maintenance.13 B.1 Introduction.13 B.2 Heat meter service life.13 B.3 Heat meter monitoring procedures.13 B.4 Maintenance check list.14 B.5 Replacement of failed heat meters.14 Annex C (informative)
Suggested gauge for checking the dimensions of installed temperature sensor pockets.16
EN 1434-6:2007 (E) 3 Foreword This document (EN 1434-6:2007) has been prepared by Technical Committee CEN/TC 176 “Heat Meters”, the secretariat of which is held by DS. 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 2007, and conflicting national standards shall be withdrawn at the latest by August 2007. This document supersedes EN 1434-6:1997. The other parts are: Part 1 - General requirements Part 2 - Constructional requirements Part 3 - Data exchange and interfaces Part 4 - Pattern approval tests Part 5 - Initial verification tests According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EN 1434-6:2007 (E) 4 1 Scope This European Standard specifies installation, commissioning, operational monitoring and maintenance and applies to heat meters, that is to instruments intended for measuring the heat which, in a heat-exchange circuit, is absorbed (cooling) or given up (heating) by a liquid called the heat-conveying liquid. The heat 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. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1434-1:2007, Heat meters — Part 1: General requirements 3 Terms and definitions For the purpose of this document, the terms, definitions and symbols given in Clause 4 of EN 1434-1:2007 and the following apply. 3.1 heating system heating installation of the dwelling or premises, including the exchange circuit, the heat meter, the associated fittings and the electrical equipment NOTE The heating system typically commences and finishes at the two connections to the heat mains. 3.2 heat mains heat suppliers distribution pipes to which the consumer's installation is connected 3.3 flow and return limbs pipes connecting the heating system to the heat mains 3.4 primary circuit circuit hydraulically connected to the heat mains 3.5 secondary circuit circuit hydraulically separated from the primary circuit. 3.6 competent authority persons or organizations charged with the responsibility for the heat meter and/or its installation
EN 1434-6:2007 (E) 5 4 Requirements 4.1 Design requirements When designing the heating system, the heat meter supplier's installation instructions shall be followed. NOTE For DN 25 and smaller, it is possible to use short probes. To achieve good temperature sensitivity, probes should be installed without temperature pockets. Temperature pockets should only be used when required for safety reasons. 4.2 Installation requirements The heat meter shall be installed in accordance with the supplier'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 heat meter shall be protected from the risk of damage by shock and vibration induced by the surround-ings at the place of installation. The heat 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 heat meter shall be adequately anchored. Heat 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. 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. Signal circuits between parts of a heat meter shall be so installed as to deter unauthorized interference and disconnection. Precautions shall be taken to prevent damage to the heat meter by unfavourable hydraulic conditions (cavitation, surging, water hammer). When the installation of the heat meters is complete, it shall be inspected and approved by representatives of the competent authority in accordance with established procedures. 4.3 Heat 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, but however arranged, the following points shall be addressed and responsibilities defined.
EN 1434-6:2007 (E) 6 4.3.2 Certification check Before commissioning commences it shall be ascertained firstly, that the correct heat meter has been installed by comparing the heat meter supplier's type and size designation against the system specification. Secondly, it shall be checked that the heat 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 heat meter installed. 4.3.3 Installation check 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 heat meter installed at a safe distance from sources of electromagnetic interference (switchgear, electric motors, fluorescent lights)? • Where called for, has the heat meter been correctly earthed? • Are the accessories correctly installed according to the installation instructions of the supplier and operator? • Is the
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