CEN/TR 1404:2024

SLOVENSKI STANDARD
01-december-2023
Določanje emisij iz plinskih aparatov pri tipskem preskušanju
Determination of emissions from appliances burning gaseous fuel during tape-testing
Bestimmung von Emissionen von Gasgeräten während der Typprüfung
Determination of emissions from appliances burning gaseous fuel during tape-testing
Ta slovenski standard je istoveten z: FprCEN/TR 1404
ICS:
13.040.40 Emisije nepremičnih virov Stationary source emissions
27.060.20 Plinski gorilniki Gas fuel burners
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

FINAL DRAFT
TECHNICAL REPORT
FprCEN/TR 1404
RAPPORT TECHNIQUE
TECHNISCHER REPORT
September 2023
ICS 97.040.20; 13.040.40 Will supersede CR 1404:1994
English Version
Test gases - Determination of emissions from appliances
burning gaseous fuels during type-testing
Determination of emissions from appliances burning Bestimmung von Emissionen von Gasgeräten während
gaseous fuel during tape-testing der Typprüfung

This draft Technical Report is submitted to CEN members for Vote. It has been drawn up by the Technical Committee CEN/TC
238.
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.
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 Technical Report. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a Technical Report.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. FprCEN/TR 1404:2023 E
worldwide for CEN national Members.

FprCEN/TR 1404:2023 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, symbols and abbreviations . 6
3.1 Terms and definitions . 6
3.2 Symbols and abbreviations . 8
4 Parameters impacting the uncertainty of the measurements . 8
4.1 General. 8
4.2 Calculation of individual sources of uncertainties . 8
4.3 Total systematic error. 9
4.4 Reproducibility / repeatability of the CO and NO emissions . 9
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4.5 Warming up . 9
4.6 Response time . 11
4.7 Setting of zero . 11
4.8 Repeatability . 12
5 Main performance characteristics of the analysers . 13
5.1 General. 13
5.2 Linearity . 13
5.3 Drifts . 14
5.3.1 General. 14
5.3.2 Drift with ambient temperature . 14
5.3.3 Drift with ambient pressure . 15
5.3.4 Drift with time . 15
5.4 Interferences . 16
5.5 Measuring range . 16
5.6 Converter efficiency (NO to NO) . 16
6 Calibration gases . 17
6.1 Materials in contact with gases . 17
6.2 Characteristics of the calibration gases . 17
6.3 Accuracy of the calibration gases . 17
6.3.1 General. 17
6.3.2 Uncertainty in concentration of calibration gas . 17
7 Periodical checks . 17
8 Sampling line . 18
8.1 Introduction . 18
8.2 General. 18
8.2.1 Sampling flow rate in sampling line . 18
8.2.2 Sampling probe . 19
8.2.3 Response time . 19
8.3 Water vapour removable method (dry sampling) . 19
8.3.1 Minimum temperature . 19
8.3.2 Transport (sampling) line . 19
FprCEN/TR 1404:2023 (E)
8.3.3 Cooler/condenser or permeation dryer . 19
8.3.4 Filter . 19
8.3.5 Manifold . 19
8.3.6 Flow meter / rotameter . 20
8.3.7 Sampling pump . 20
8.4 Wet sampling . 20
9 Testing procedures . 20
9.1 General . 20
9.2 Test room . 20
9.3 Calibration. 20
9.4 Sampling . 21
9.4.1 General . 21
9.4.2 Non-flued appliances are excluded from the scope. . 21
9.4.3 Flued appliances (type B appliances). 21
9.4.4 Balanced flue appliances (type C appliances) . 21
9.4.5 Forced draught burners in relation to the fire tube testing . 21
9.4.6 Test conditions . 21
9.5 Validity of the measurements . 21
9.6 Correction for ambient conditions . 21
9.7 Combustion parameters and conversion coefficients . 21
Annex A (informative) Sampling probes for type B appliances . 22
Annex B (informative) Sampling probes for type C appliances . 25
Annex C (informative) Sampling lines . 28
Annex D (informative) NO and CO: conversions to different units and dilutions . 29
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Annex E (informative)  NO and CO: correction ambient . 34
X
Annex F (informative) Combustion parameters and correction coefficients for CO and NO . 37
X
Annex G (informative) Determination of total CO and NO uncertainty . 40
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Bibliography . 41

FprCEN/TR 1404:2023 (E)
European foreword
This document (FprCEN/TR 1404:2023) has been prepared by Technical Committee CEN/TC 238 “Test
gases, test pressures, appliance categories and gas appliance types”, the secretariat of which is held by
AFNOR.
This document is currently submitted to the Vote on TR.
This document will supersede CR 1404:1994.
FprCEN/TR 1404:2023 (E)
Introduction
This document is based on CR 1404 and other information coming from the Guide for Laboratory Practice
(GLP) for the measurement, conversions and corrections of CO and NO . CR 1404 was published by CEN
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in 1994. Several standards refer to it concerning the measurement, conversion and correction of the
emissions of CO and NO .
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The ECOTEST project under mandates M/534 - ECODESIGN WATER HEATERS and 535 ECODESIGN
Central heating appliances under the "Specific agreement number:
SA/CEN/GROW/EFTA/534/535/2015-14 Rev" used the CR 1404:1994 as a reference document for the
of gas and liquid fuel boilers and water heaters tested
measurements of the emissions of CO and NOX
under this project.
After a brainstorming made by ECOTE
...