CSA C900.2:21

(EN 1434-2:2015+A1:2018, MOD)

National Standard of Canada

CSA C900.2:21

Thermal energy meters — Part 2:

Constructional requirements

(EN 1434-2:2015+A1:2018, MOD)

This national standard is based on EN 1434-2:2015+A1:2018 and parts of this standard are reproduced with the agreement of CEN, Rue de la Science 23 B–1040 Brussels, Belgium.

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  Title: Thermal energy meters — Part 2: Constructional requirements

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National Standard of Canada

CSA C900.2:21

Thermal energy meters — Part 2:

Constructional requirements

(EN 1434-2:2015+A1:2018, MOD)

Prepared by

European Committee for Standardization

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ICS 17.200.10

ISBN 978-1-4883-3209-8

© 2021 Canadian Standards Association

All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.

CSA C900.2:21 Thermal energy meters — Part 2: Constructional requirements

CSA C900.2:21

Thermal energy meters — Part 2:

Constructional requirements

(EN 1434-2:2015+A1:2018, MOD)

CSA Preface

This is the third edition of CSA C900.2, Thermal energy meters — Part 2: Constructional requirements, which is an adoption, with Canadian deviations, of the identically titled CEN (European Committee for Standardization) Standard EN 1434-2 (edition 3:2015 consolidated with Amendment 1:2018). It supersedes the previous edition, published in 2013 as CAN/CSA-C900.2 (adopted EN 1434-2:2007), Heat meters — Part 2: Constructional requirements.

For brevity, this Standard will be referred to as “CSA C900.2” throughout.

This Standard is one of a group of Standards on Thermal energy meters being adopted by CSA Group, which consists of the following:

1. CSA C900.1 (adopted EN 1434-1) — Part 1: General requirements;

2. CSA C900.2 (adopted EN 1434-2) — Part 2: Constructional requirements;

3. CSA C900.3 (adopted EN 1434-3) — Part 3: Data exchange and interfaces;

4. CSA C900.4 (adopted EN 1434-4) — Part 4: Pattern approval tests;

5. CSA C900.5 (adopted EN 1434-5) — Part 5: Initial verification tests; and

6. CSA C900.6 (adopted EN 1434-6) — Part 6: Installation, commissioning, operational monitoring and maintenance.

This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard.

This Standard was reviewed for Canadian adoption by the CSA Technical Committee on Thermal Energy Meters, under the jurisdiction of the CSA Strategic Steering Committee on Fuels and Appliances, and has been formally approved by the Technical Committee.

This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.

© 2021 Canadian Standards Association

All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. CEN material is reprinted with permission. Where the words “this European Standard” appear in the text, they should be interpreted as “this National Standard of Canada”.

April 2021 © 2021 Canadian Standards Association CSA/5

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM

EN 1434-2:2015+A1

November 2018

ICS 17.200.10

English Version

Thermal energy meters - Part 2: Constructional requirements

Compteurs d'énergie thermique - Partie 2 : Prescriptions de fabrication

Wärmezähler - Teil 2: Anforderungen an die Konstruktion

This European Standard was approved by CEN on 5 September 2015 and includes Amendment 1 approved by CEN on 18 July 2018.

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, 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 United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION C OMITÉ E UR O PÉEN DE N ORMA LI SA TIO N EUROPÄISCHES KOMITEE FÜR NORMUN G

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

© 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.

Ref. No. EN 1434-2:2015+A1:2018 E

EN 1434-2:2015+A1:2018 (E)

Contents Page

European foreword 3

1. Scope 4

2. Normative references 4

3. Terms and definitions 5

4. Temperature sensors 5

   1. General 5

   2. Mechanical design 5

   3. Platinum temperature sensor 10

   4. Other temperature sensors 12

5. Flow sensors 13

   1. Maximum admissible working pressure, PS in bar 13

   2. Sizes and dimensions 13

   3. Test signal output 14

   4. Adjusting device 14

6. Calculators 15

   1. Terminals - specification and identification 15

   2. Batteries 17

   3. Dynamic behaviour 17

   4. Test signal output 17

   5. 24 h interruption in supply voltage 18

7. Complete meter 18

8. Interfaces between sub-assemblies 18

   1. General 18

   2. Definitions for pulse device interfaces 18

9. Marking and security seals 21

   1. Marking 21

   2. Sites for marking 23

   3. Security seals 23

Annex A (informative) Examples of temperature sensors 24

Annex B (normative) Input and output test signals 35

Annex C (informative) Low voltage Power Supply for !thermal energy meters"and their

sub-assemblies 37

1. Remote supply 37

2. Local external DC supply 37

3. Power supply specifications 38

Annex ZA (informative) Relationship between this European Standard and the essential requirements of Directive2014/32/EU aimed to be covered 39

Bibliography 40

2 CSA C900.2:21

EN 1434-2:2015+A1:2018 (E)

European foreword

This document (EN 1434-2:2015+A1:2018) 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 May 2019, and conflicting national standards shall be withdrawn at the latest by May 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 2018-07-18. This document supersedes !EN 1434-2:2015".

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(s).

For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.

EN 1434-2, !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 1434-2:2007, the following changes have been made:

• additional functionalities for smart metering applications are added;

• minimum requirements for test signal output of calculators are added;

• minimum requirements for test data interface of complete !thermal energy meters" are added;

• new forms of pockets and sensors and parmeter setting and adjustment through interface 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.

CSA C900.2:21 3

EN 1434-2:2015+A1:2018 (E)

1. Scope

   
   

   This European Standard specifies the constructional 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 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 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 1: Steel flanges

EN 1092-2, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 2: Cast iron flanges

EN 1092-3, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 3: Copper alloy flanges

!EN 1434-1:2015+A1:2018, Thermal energy meters — Part 1: General requirements"

EN 1434-3, Heat Meters — Part 3: Data exchange and interfaces

EN 60751:2008, Industrial platinum resistance thermometers and platinum temperature sensors (IEC 60751:2008)

EN 60947-5-6, Low-voltage switchgear and controlgear — Part 5-6: Control circuit devices and switching elements — DC interface for proximity sensors and switching amplifiers (NAMUR) (IEC 60947-5-6)

EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances and designation (ISO 228-1)

ISO 4903, Information technology — Data communication — 15-pole DTE/DCE interface connector and contact number assignments

4 CSA C900.2:21