CSA C900.1:21

(EN 1434-1:2015+A1:2018, MOD)

National Standard of Canada

CSA C900.1:21

Thermal energy meters — Part 1:

General requirements

(EN 1434-1:2015+A1:2018, MOD)

This national standard is based on EN 1434-1:2015+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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  CSA C900.1:21

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  Title: Thermal energy meters — Part 1: General requirements

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National Standard of Canada

CSA C900.1:21

Thermal energy meters — Part 1:

General requirements

(EN 1434-1:2015+A1:2018, MOD)

Prepared by

European Committee for Standardization

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ICS 17.200.10

ISBN 978-1-4883-3208-1

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CSA C900.1:21 Thermal energy meters — Part 1: General requirements

CSA C900.1:21

Thermal energy meters — Part 1:

General requirements

(EN 1434-1:2015+A1:2018, MOD)

CSA Preface

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

For brevity, this Standard will be referred to as “CSA C900.1” 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

Contents Page

European foreword 4

1. Scope 6

2. Normative references 6

3. Terms and definitions 6

4. Types of instruments 11

   1. General 11

   2. Complete instrument 11

   3. Combined instrument 11

   4. Hybrid instrument 11

   5. Sub-assemblies of a !thermal energy meter", which is a combined instrument 11

      1. General 11

      2. Flow sensor 12

      3. Temperature sensor pair 12

      4. Calculator 12

   6. Equipment under test (EUT) 12

5. Rated operating conditions 12

   1. Limits of temperature range 12

   2. Limits of temperature differences 12

   3. Limits of flow rate 12

   4. Limit of thermal power 13

   5. Limits of working pressure (PS and Pmin) 13

   6. Nominal pressure (PN) 13

   7. Limits in ambient temperature 13

   8. Limits in deviations in supply voltage 13

   9. Maximum pressure loss 13

   10. Specific requirements on registration devices 13

       1. General 13

       2. Suitability 13

       3. Rated operated conditions 14

       4. Indication 14

       5. MPE 15

6. Technical characteristics 15

   1. Materials and construction 15

   2. Requirements outside the limiting values of the flow rate 16

   3. Display 16

   4. Protection against fraud 17

   5. Supply voltage 17

   6. Qualifying immersion depth of a temperature sensor 17

   7. The influence on a temperature sensor pair caused by mounting in pockets 17

   8. Reproducibility 17

   9. Repeatability 18

   10. Software 18

7. Specified working range 18

   1. General 18

   2. Temperature difference 18

   3. Flow rate 18

8. Heat transmission formula 18

9. Metrological characteristics (Maximum Permissible Error, MPE) 19

   1. General 19

   2. Values of maximum permissible errors 19

      1. Maximum permissible relative errors of complete !thermal energy meters" 19

      2. Maximum permissible relative error of sub-assemblies 20

   3. Application of maximum permissible errors 20

10. Environmental classification 21

    1. General 21

    2. Environmental class A (Domestic use, indoor installations) 21

    3. Environmental class B (Domestic use, outdoor installations) 21

    4. Environmental class C (Industrial installations) 21

    5. Mechanical classes M1 to M3 21

11. !Thermal energy meter" specification 22

    1. General 22

    2. Flow sensor 22

    3. Temperature sensor pair 23

    4. Calculator 24

    5. Complete meters 25

12. Information to be made available by the manufacturer or supplier 27

    1. Installation instructions 27

    2. Parameter setting instructions 28

    3. Adjustment instructions 28

    4. Maintenance instructions 29

    5. Hints for disposal instructions 29

Annex A (normative) Heat coefficient equations 30

Annex B (normative) Flow conditioner package 32

Annex C (normative) Fast response meters 34

Annex ZA (informative) Relationship between this European Standard and the essential requirements of Directive 2014/32/EU aimed to be covered 35

Bibliography 38

European foreword

This document (EN 1434-1:2015+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 1434-1:2015".

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 1434-1:2007, the following changes have been made:

• special cases for combined !bifunctional thermal energy meters" are added;

  
  

• additional functionality for smart metering applications are added;

  
  

• metrological requirements for smart metering applications are added;

  
  

• definitions and requirements for the cooling meter are added;

  
  

• tariff meters are added;

  
  

  
  

  1) EN 1434-3 is maintained by CEN/TC 294.

• terms and definitions, requirements for registration devices and cooling meters are added;

  
  

• requirements for fast response meters are added (informative Annex C).

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. Scope

   
   

   This European Standard specifies 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 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 1434-2:2015+A1:2018, Thermal energy meters — Part 2: Constructional requirements"

   
   

   !EN 1434-4:2015+A1:2018, Thermal energy meters — Part 4: Pattern approval test"

   
   

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

   
   

   EN 61010-1, Safety requirements for electrical equipment for measurement, control and laboratory use — Part 1: General requirements (IEC 61010-1)

   
   

3. Terms and definitions

For the purposes of this document, the following terms and definitions apply.

3.1

response time

τ0,5

time interval between the instant when flow or temperature difference is subjected to a specified abrupt change and the instant when the response reaches 50 % of the step value

3.2

fast response meter

meter suitable for heat exchanging circuits with rapid dynamic variations in the exchanged heat

Note 1 to entry: See also Annex C.

3.3

rated voltage

Un

voltage of the external power supply required to operate the !thermal energy meter", conventionally the voltage of the AC mains supply

3.4

rated operating conditions

conditions of use, giving the range of values of influence quantities, for which the metrological characteristics of the instrument are within the specified maximum permissible errors