Air conditioners, liquid chilling packages and heat pumps for space heating and cooling and process chillers, with electrically driven compressors - Part 4: Requirements

1.1   The scope of EN 14511 1 is applicable, with the exception of process chillers.
1.2   This European Standard specifies minimum operating requirements which ensure that air conditioners, heat pumps and liquid chilling packages using either air, water or brine as heat transfer media, with electrical driven compressors are fit for the use designated by the manufacturer when used for space heating and/or cooling.

Luftkonditionierer, Flüssigkeitskühlsätze und Wärmepumpen für die Raumbeheizung und -kühlung und Prozess-Kühler mit elektrisch angetriebenen Verdichtern - Teil 4: Anforderungen

1.1   Es gilt der Anwendungsbereich von FprEN 14511-1:2022 mit Ausnahme von Prozess-Kühlern.
1.2   Dieses Dokument legt Mindestbetriebsanforderungen fest, durch die sichergestellt ist, dass Luft-konditionierer, Wärmepumpen und Flüssigkeitskühlsätze, die Luft, Wasser oder Sole als Wärmeträger nutzen und mit elektrisch angetriebenen Verdichtern betrieben werden, für die vom Hersteller vorgesehene Anwendung geeignet sind, wenn sie für die Raumbeheizung und/oder -kühlung eingesetzt werden.

Climatiseurs, groupes refroidisseurs de liquide et pompes à chaleur pour le chauffage et le refroidissement des locaux et refroidisseurs industriels avec compresseur entraîné par moteur électrique - Partie 4: Exigences

1.1   Le domaine d’application de l’EN 14511-1:2022 est applicable, à l’exception des refroidisseurs industriels.
1.2   Le présent document spécifie les exigences minimales permettant d’assurer que des climatiseurs, des pompes à chaleur et des groupes refroidisseurs de liquide utilisant l’air, l’eau ou l’eau glycolée comme fluide caloporteur, avec compresseur entraîné par moteur électrique, sont aptes à l’emploi prévu par le fabricant lorsqu’ils sont utilisés pour le chauffage et/ou le refroidissement des locaux.

Klimatske naprave, enote za hlajenje kapljevine, toplotne črpalke za ogrevanje in hlajenje prostora ter procesne hladilne naprave z električnimi kompresorji - 4. del: Zahteve

General Information

Status
Published
Public Enquiry End Date
02-May-2021
Publication Date
18-Sep-2022
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
14-Sep-2022
Due Date
19-Nov-2022
Completion Date
19-Sep-2022

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SLOVENSKI STANDARD
SIST EN 14511-4:2022
01-november-2022
Nadomešča:
SIST EN 14511-4:2018

Klimatske naprave, enote za hlajenje kapljevine, toplotne črpalke za ogrevanje in

hlajenje prostora ter procesne hladilne naprave z električnimi kompresorji - 4. del:

Zahteve

Air conditioners, liquid chilling packages and heat pumps for space heating and cooling

and process chillers, with electrically driven compressors - Part 4: Requirements

Luftkonditionierer, Flüssigkeitskühlsätze und Wärmepumpen für die Raumbeheizung und

-kühlung und Prozess-Kühler mit elektrisch angetriebenen Verdichtern - Teil 4:
Anforderungen

Climatiseurs, groupes refroidisseurs de liquide et pompes à chaleur pour le chauffage et

le refroidissement des locaux et refroidisseurs industriels avec compresseur entraîné par

moteur électrique - Partie 4: Exigences
Ta slovenski standard je istoveten z: EN 14511-4:2022
ICS:
23.120 Zračniki. Vetrniki. Klimatske Ventilators. Fans. Air-
naprave conditioners
27.080 Toplotne črpalke Heat pumps
91.140.30 Prezračevalni in klimatski Ventilation and air-
sistemi conditioning systems
SIST EN 14511-4:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 14511-4:2022
---------------------- Page: 2 ----------------------
SIST EN 14511-4:2022
EN 14511-4
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2022
EUROPÄISCHE NORM
ICS 27.080; 91.140.30 Supersedes EN 14511-4:2018
English Version
Air conditioners, liquid chilling packages and heat pumps
for space heating and cooling and process chillers, with
electrically driven compressors - Part 4: Requirements

Climatiseurs, groupes refroidisseurs de liquide et Luftkonditionierer, Flüssigkeitskühlsätze und

pompes à chaleur pour le chauffage et le Wärmepumpen für die Raumbeheizung und kühlung

refroidissement des locaux et refroidisseurs industriels und Prozess-Kühler mit elektrisch angetriebenen

avec compresseur entraîné par moteur électrique - Verdichtern - Teil 4: Anforderungen

Partie 4 : Exigences
This European Standard was approved by CEN on 10 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 14511-4:2022 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 14511-4:2022
EN 14511-4:2022 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 5

4 Operating requirements ............................................................................................................................... 5

4.1 General ................................................................................................................................................................ 5

4.2 Temperature operating range .................................................................................................................... 6

4.2.1 Starting and operating tests ........................................................................................................................ 6

4.3 Outside the operating range ....................................................................................................................... 9

4.4 Freeze-up test in cooling mode .................................................................................................................. 9

4.5 Shutting off the heat transfer medium flows ..................................................................................... 10

4.6 Complete power supply failure ............................................................................................................... 10

4.7 Condensate draining and enclosure sweat test................................................................................. 10

4.8 Other requirements .................................................................................................................................... 11

5 Technical data sheet ................................................................................................................................... 11

5.1 General description ..................................................................................................................................... 11

5.2 Performance characteristics .................................................................................................................... 12

5.2.1 Rating characteristics ................................................................................................................................. 12

5.2.2 Additional characteristics ......................................................................................................................... 12

5.2.3 Sound characteristics ................................................................................................................................. 12

5.3 Electrical characteristics ........................................................................................................................... 12

5.4 Operating range ............................................................................................................................................ 12

6 Instructions .................................................................................................................................................... 13

6.1 General ............................................................................................................................................................. 13

6.2 Physical description .................................................................................................................................... 13

6.2.1 Refrigerant, air and/or liquid circuits .................................................................................................. 13

6.2.2 Additional heating devices, when integral to the unit .................................................................... 13

6.2.3 Control and safety ........................................................................................................................................ 13

6.3 Instructions for installation ..................................................................................................................... 13

6.4 Instruction for maintenance .................................................................................................................... 14

6.5 Instructions to test houses ........................................................................................................................ 14

---------------------- Page: 4 ----------------------
SIST EN 14511-4:2022
EN 14511-4:2022 (E)
European foreword

This document (EN 14511-4:2022) has been prepared by Technical Committee CEN/TC 113 “Heat

pumps and air conditioning units”, the secretariat of which is held by UNE.

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 March 2023, and conflicting national standards shall be

withdrawn at the latest by March 2023.

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 supersedes EN 14511-4:2018.
The main changes compared with EN 14511-4:2018 are as follows:
— update of normative references;
— deletion of Clause 5 “Marking”.

This document has been prepared under a Standardization Request given to CEN by the European

Commission and the European Free Trade Association.
This document has been prepared in the frame of:

— Commission Regulation (EU) No 206/2012 of 6 March 2012 implementing Directive 2009/125/EC

of the European Parliament and of the Council with regard to ecodesign requirements for air

conditioners and comfort fans;

— Commission Delegated Regulation (EU) No 626/2011 of 4 May 2011 supplementing Directive

2010/30/EU of the European Parliament and of the Council with regard to energy labelling of air

conditioners;

— Commission Regulation (EU) No 813/2013 of 2 August 2013 implementing Directive 2009/125/EC

of the European Parliament and of the Council with regard to ecodesign requirements for space

heaters and combination heaters;

— Commission Delegated Regulation (EU) No 811/2013 of 18 February 2013 supplementing Directive

2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of

space heaters, combination heaters, packages of space heater, temperature control and solar device

and packages of combination heater, temperature control and solar device;

— Commission Regulation (EU) 2015/1095 of 5 May 2015 implementing Directive 2009/125/EC of the

European Parliament and of the Council with regard to ecodesign requirements for professional

refrigerated storage cabinets, blast cabinets, condensing units and process chillers;

— Commission Regulation (EU) 2016/2281 of 30 November 2016 implementing Directive

2009/125/EC of the European Parliament and of the Council establishing a framework for the setting

of ecodesign requirements for energy-related products, with regard to ecodesign requirements for

air heating products, cooling products, high temperature process chillers and fan coil units.

---------------------- Page: 5 ----------------------
SIST EN 14511-4:2022
EN 14511-4:2022 (E)

EN 14511, Air conditioners, liquid chilling packages and heat pumps for space heating and cooling and

process chillers, with electrically driven compressors, currently comprises the following parts:

— Part 1: Terms and definitions;
— Part 2: Test conditions;
— Part 3: Test methods;
— Part 4: Requirements.

Any feedback and questions on this document should be directed to the users’ national standards body.

A complete listing of these bodies can be found on the CEN website.

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, 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 the United

Kingdom.
---------------------- Page: 6 ----------------------
SIST EN 14511-4:2022
EN 14511-4:2022 (E)
1 Scope

1.1 The scope of EN 14511-1:2022 is applicable, with the exception of process chillers.

1.2 This document specifies minimum operating requirements which ensure that air conditioners, heat

pumps and liquid chilling packages using either air, water or brine as heat transfer media, with electrical

driven compressors are fit for the use designated by the manufacturer when used for space heating

and/or cooling.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 14511-1:2022, Air conditioners, liquid chilling packages and heat pumps for space heating and cooling

and process chillers, with electrically driven compressors — Part 1: Terms and definitions

EN 14511-2:2022, Air conditioners, liquid chilling packages and heat pumps with electrically driven

compressors for space heating and cooling and process chillers, with electrically driven compressors —

Part 2: Test conditions

EN 14511-3:2022, Air conditioners, liquid chilling packages and heat pumps for space heating and cooling

and process chillers, with electrically driven compressors — Part 3: Test methods

EN 12102-1:2017, Air conditioners, liquid chilling packages, heat pumps, process chillers and dehumidifiers

with electrically driven compressors — Determination of the sound power level — Part 1: Air conditioners,

liquid chilling packages, heat pumps for space heating and cooling, dehumidifiers and process chillers

EN 60204-1:2018, Safety of machinery — Electrical equipment of machines — Part 1: General requirements

(IEC 60204-1:2016)

FprEN IEC 60335-2-40:2021, Household and similar electrical appliances — Safety — Part 2-40: Particular

requirements for electrical heat pumps, air-conditioners and dehumidifiers (IEC 60335-2-40:2018)

3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 14511-1:2022 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
4 Operating requirements
4.1 General
Except where otherwise stated, tests shall be cond
...

SLOVENSKI STANDARD
oSIST prEN 14511-4:2021
01-april-2021

Klimatske naprave, enote za hlajenje kapljevine, toplotne črpalke za ogrevanje in

hlajenje prostora ter procesne hladilne naprave z električnimi kompresorji - 4. del:

Zahteve

Air conditioners, liquid chilling packages and heat pumps for space heating and cooling

and process chillers, with electrically driven compressors - Part 4: Requirements

Luftkonditionierer, Flüssigkeitskühlsätze und Wärmepumpen für die Raumbeheizung und

-kühlung und Prozess-Kühler mit elektrisch angetriebenen Verdichtern - Teil 4:
Anforderungen

Climatiseurs, groupes refroidisseurs de liquide et pompes à chaleur pour le chauffage et

le refroidissement des locaux et refroidisseurs industriels avec compresseur entraîné par

moteur électrique - Partie 4: Exigences
Ta slovenski standard je istoveten z: prEN 14511-4
ICS:
23.120 Zračniki. Vetrniki. Klimatske Ventilators. Fans. Air-
naprave conditioners
27.080 Toplotne črpalke Heat pumps
91.140.30 Prezračevalni in klimatski Ventilation and air-
sistemi conditioning systems
oSIST prEN 14511-4:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 14511-4:2021
---------------------- Page: 2 ----------------------
oSIST prEN 14511-4:2021
DRAFT
EUROPEAN STANDARD
prEN 14511-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2021
ICS Will supersede EN 14511-4:2018
English Version
Air conditioners, liquid chilling packages and heat pumps
for space heating and cooling and process chillers, with
electrically driven compressors - Part 4: Requirements

Climatiseurs, groupes refroidisseurs de liquide et Luftkonditionierer, Flüssigkeitskühlsätze und

pompes à chaleur pour le chauffage et le Wärmepumpen für die Raumbeheizung und -kühlung

refroidissement des locaux et refroidisseurs industriels und Prozess-Kühler mit elektrisch angetriebenen

avec compresseur entraîné par moteur électrique - Verdichtern - Teil 4: Anforderungen

Partie 4: Exigences

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 113.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14511-4:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 14511-4:2021
prEN 14511-4:2021 (E)
Contents

European foreword ....................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions ................................................................................................................................... 4

4 Operating requirements ............................................................................................................................... 5

4.1 General ................................................................................................................................................................ 5

4.2 Temperature operating range .................................................................................................................... 5

4.3 Outside the operating range ....................................................................................................................... 8

4.4 Freeze-up test in cooling mode .................................................................................................................. 8

4.5 Shutting off the heat transfer medium flows ........................................................................................ 9

4.6 Complete power supply failure .................................................................................................................. 9

4.7 Condensate draining and enclosure sweat test.................................................................................... 9

4.8 Other requirements .................................................................................................................................... 10

5 Marking ............................................................................................................................................................ 11

6 Technical data sheet ................................................................................................................................... 11

6.1 General description ..................................................................................................................................... 11

6.2 Performance characteristics .................................................................................................................... 12

6.2.1 Rating characteristics ................................................................................................................................. 12

6.2.2 Additional characteristics ......................................................................................................................... 12

6.2.3 Sound characteristics ................................................................................................................................. 12

6.3 Electrical characteristics ........................................................................................................................... 12

6.4 Operating range ............................................................................................................................................ 12

7 Instructions .................................................................................................................................................... 13

7.1 General ............................................................................................................................................................. 13

7.2 Physical description .................................................................................................................................... 13

7.2.1 Refrigerant, air and/or liquid circuits .................................................................................................. 13

7.2.2 Additional heating devices, when integral to the unit .................................................................... 13

7.2.3 Control and safety ........................................................................................................................................ 13

7.3 Instructions for installation ..................................................................................................................... 13

7.4 Instruction for maintenance .................................................................................................................... 14

7.5 Instructions to test houses ........................................................................................................................ 14

Bibliography ................................................................................................................................................................. 15

---------------------- Page: 4 ----------------------
oSIST prEN 14511-4:2021
prEN 14511-4:2021 (E)
European foreword

This document (prEN 14511-4:2021) has been prepared by Technical Committee CEN/TC 113 “Heat

pumps and air conditioning units”, the secretariat of which is held by UNE.
This document is currently submitted to the Enquiry.
This document will supersede EN 14511-4:2018.
This document has been prepared in the frame of:

— the Commission Regulation (EU) No 206/2012 implementing Directive 2009/125/EC with regard to

ecodesign requirements for air conditioners;

— the Commission Regulation (EU) n° 626/2011 supplementing Directive 2010/30/EU with regard to

energy labelling for air conditioners;

— the Commission Regulation (EU) No 813/2013 implementing Directive 2009/125/EC with regard to

ecodesign requirements for air-to-water and water-to-water heat pump space heaters;

— the Commission Regulation (EU) n° 811/2013 supplementing Directive 2010/30/EU with regard to

energy labelling for air-to-water and water-to-water heat pump space heaters;

— the Commission Regulation (EU) n° 2015/1095 implementing Directive 2009/125/EC of the

European Parliament and of the Council with regard to ecodesign requirements for process chillers;

— Commission Regulation (EU) 2016/2281 implementing Directive 2009/125/EC of the European

Parliament and of the Council with regard to ecodesign requirements for air heating products,

cooling products, high temperature process chillers and fan coil units.

EN 14511, Air conditioners, liquid chilling packages and heat pumps for space heating and cooling and

process chillers, with electrically driven compressors currently comprises the following parts:

— Part 1: Terms and definitions
— Part 2: Test conditions
— Part 3: Test methods
— Part 4: Requirements
---------------------- Page: 5 ----------------------
oSIST prEN 14511-4:2021
prEN 14511-4:2021 (E)
1 Scope

1.1 The scope of prEN 14511-1:2021 is applicable, with the exception of process chillers.

1.2 This document specifies minimum operating requirements which ensure that air conditioners, heat

pumps and liquid chilling packages using either air, water or brine as heat transfer media, with electrical

driven compressors are fit for the use designated by the manufacturer when used for space heating

and/or cooling.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 12102-1:2017, Air conditioners, liquid chilling packages, heat pumps, process chillers and dehumidifiers

with electrically driven compressors - Determination of the sound power level - Part 1: Air conditioners,

liquid chilling packages, heat pumps for space heating and cooling, dehumidifiers and process chillers

prEN 14511-1:2021, Air conditioners, liquid chilling packages and heat pumps for space heating and

cooling and process chillers, with electrically driven compressors — Part 1: Terms and definitions

prEN 14511-2:2021, Air conditioners, liquid chilling packages and heat pumps with electrically driven

compressors for space heating and cooling and process chillers, with electrically driven compressors —

Part 2: Test conditions

prEN 14511-3:2021, Air conditioners, liquid chilling packages and heat pumps for space heating and

cooling and process chillers, with electrically driven compressors — Part 3: Test methods

EN 60204-1:2018, Safety of machinery - Electrical equipment of machines - Part 1: General requirements

(IEC 60204-1:2016)

prEN IEC 60335-2-40:2020, Household and similar electrical appliances — Safety — Part 2-40: Particular

requirements for electrical heat pumps, air-conditioners and dehumidifiers (IEC 60335-2-40:2018)

EN IEC 61000-3-11:2019, Electromagnetic compatibility (EMC) — Part 3-11: Limits — Limitation of

voltage changes, voltage fluctuations and flicker in public low-voltage supply systems — Equipment with

rated current ≤ 75 A and subject to conditional connection (IEC 61000-3-11:2017)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in prEN 14511-1:2021 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
---------------------- Page: 6 ----------------------
oSIST prEN 14511-4:2021
prEN 14511-4:2021 (E)
4 Operating requirements
4.1 General

Except where otherwise stated, tests shall be conducted as described in prEN 14511-2:2021 and

prEN 14511-3:2021.
4.2 Temperature operating range
4.2.1 Starting and operating tests
4.2.1.1 General

The unit shall be capable of starting and/or operating within the limit of use (temperatures and flows)

specified by the manufacturer.

Rated voltage shall be set at the beginning of the test and maintained constant during the test.

The environmental conditions during the test shall be as specified in prEN 14511-2:2021, Tables 1 and

Air flow rates shall be the same as that used for the rating capacity test, as specified in

prEN 14511-2:2021.

The temperatures shall be set at the beginning of the test and maintained constant during the test.

For a given air dry bulb temperature, the relative humidity shall be defined accordingly to Table 1 and

used for the calculation of the wet bulb temperature to be set.
Table 1 — Determination of wet bulb temperature related to dry bulb temperature
Dry bulb temperature T Wet bulb temperature T
DB WB
°C °C
T < −11 Not defined
−10 ≤ T ≤ 12 T = T −1
DB WB DB
12 < T ≤ 20 T = 0,34 * T + 6,95
DB WB DB
T > 20 T = 0,6414 * T + 1,5931
DB WB DB
Deviation between individual values and set values shall be between:

— zero and minus twice the permissible deviation according to prEN 14511-3:2021, Table 4 for the

upper limit of use;

— zero and plus twice the permissible deviation according to prEN 14511-3:2021, Table 4 for the lower

limit of use.
Uncert
...

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