Portable electrical apparatus for the measurement of combustion flue gas parameters - Guide to their use in the process of commissioning, servicing and maintaining gas fired appliances

This Technical Specification provides guidance on the selection, use and maintenance of portable electrical apparatus conforming to EN 50379-1 [4] and EN 50379-2 [5] or EN 50379-3 [6] to:
a)   measure combustion flue gas parameters of appliances in domestic premises burning 1st, 2nd or 3rd family gases of the following description:
1)   Type A, Type B and Type C gas-fired appliances, except those appliances where the appliance instructions (or design, see 7.3.2.1), prohibit combustion sampling, and,
2)   all gas-fired appliances for which the appliance manufacturer has provided a purpose-designed combustion sampling point or specific sampling instructions,
b)   use as a diagnostic instrument to assist an operative:
1)   in confirming satisfactory combustion at the time of commissioning, in accordance with appliance instructions or national or local regulations or standards;
2)   in confirming satisfactory combustion at the time of servicing in accordance with national or local regulations or standards or following servicing in accordance with appliance instructions;
3)   in confirming satisfactory combustion following maintenance, in accordance with appliance instructions or national or local regulations or standards.
NOTE 1   Type A, Type B and Type C classification of gas-fired appliances are defined in 3.1.2 and more fully in CEN/TR 1749 [2].
NOTE 2   Existing national or local regulations or standards conflicting with the guidance in this Technical Specification have precedence over this guidance.
NOTE 3   It is not the intention of this Technical Specification to suggest that portable electrical combustion flue gas analysers are to be used as a substitute for normal service and maintenance carried out in accordance with the gas appliance instructions. Clause 9 describes how analysers can be used in conjunction with the appliance instructions.
NOTE 4   EN 50379-)1 [4] specifies general requirements for the construction, testing and performance of portable spot reading apparatus designed to check the combustion performance of appliances in domestic premises using commercially available fuels.
NOTE 5   EN 50379-2 [5] is for apparatus intended to be used for statutory measurements. In several European countries, legal requirements exist for the performance of heating appliances (see EN 50379-1:2012, informative Annex A [4]). Legal consequences resulting from performance measurements makes for strict requirements for the apparatus used (see EN 50379-1:2012, normative Annexes B and C [4]).
NOTE 6   EN 50379-3 [6] is for apparatus intended to be used for non-statutory applications, which allows for reduced performance requirements for the portable electrical apparatus.
NOTE 7   This Technical Specification deals with the determination of levels of combustion gases carbon monoxide (CO), carbon dioxide (CO2) and/or oxygen (O2) in combustion products from gas-fired appliances. Combustion products from gas-fired appliances will contain nitrogen oxides (NOX), predominantly nitrogen monoxide (nitric oxide, NO) and nitrogen dioxide (NO2). This Technical Specification does not deal with the measurement of combustion products such as NOX and aldehydes.

Tragbare elektrische Geräte zur Messung von Verbrennungsparametern - Leitfaden für den Einsatz für Inbetriebnahme, Wartung und Instandsetzung von gasbefeuerten Einrichtungen

Diese Technische Spezifikation bildet einen Leitfaden für Auswahl, Gebrauch und Instandhaltung von tragbaren elektrischen Geräten, die EN 50379 1 [4] und EN 50379 2 [5] oder EN 50379 3 [6] erfüllen: a) für die Messung von Verbrennungsparametern von Gas-Einrichtungen in Privathaushalten der Gase der 1., 2. oder 3. Familie mit der folgenden Beschreibung: 1) Gasbefeuerte Einrichtungen Typ A, Typ B und Typ C mit Ausnahme solcher Einrichtungen, bei denen die Betriebsanleitung der Einrichtung, (oder die Konstruktion, siehe 7.3.2.1), die Entnahme von Verbrennungsgas verbietet, und 2) Alle gasbefeuerten Einrichtungen, für die der Gasgerätehersteller eine Probenahmestelle für diesen Einsatzzweck bereitstellt oder spezifische Angaben zur Probenahme liefert, b) und als ein Diagnosewerkzeug, um den Handwerker zu unterstützen bei: 3) der Bestätigung einer zufriedenstellenden Verbrennung während der Inbetriebnahme in Übereinstim-mung mit der Betriebsanleitung der Einrichtung, nationalen oder örtlichen Regelwerken bzw. Normen 4) der Bestätigung einer zufriedenstellenden Verbrennung während der Wartung in Übereinstimmung mit nationalen oder örtlichen Regelwerken bzw. Normen oder Wartungsvorschrift in der Betriebsanleitung der Einrichtung 5) der Bestätigung einer zufriedenstellenden Verbrennung bei der Instandsetzung in Übereinstimmung mit der Betriebsanleitung der Einrichtung, nationalen oder örtlichen Regelwerken bzw. Normen ANMERKUNG 1 Die Einstufung von gasbefeuerten Einrichtungen in Typ A, Typ B und Typ C sind in 3.1.2 und ausführlicher in CEN/TR 1749 [2] beschrieben ANMERKUNG 2 Bestehende nationale oder örtliche Regelwerke bzw. Normen, die zu den Empfehlungen dieser Technischen Spezifikation im Widerspruch stehen, besitzen Vorrang gegenüber diesen Empfehlungen. ANMERKUNG 3 Es ist nicht die Absicht dieser Technischen Spezifikation, zu empfehlen, dass tragbare elektrische Geräte zur Messung von Verbrennungsparametern als Ersatz für normale Wartung und Instandsetzung gemäß der Betriebsanleitung für die Gas-Einrichtung eingesetzt werden. Abschnitt 9 beschreibt, wie die Messgeräte in Verbindung mit der Betriebsanleitung der Einrichtung benutzt werden können. ANMERKUNG 4 EN 50379 1 [4] beschreibt die allgemeinen Anforderungen für die Bauausführung, die Prüfung und das Betriebsverhalten von Geräten für Kurzzeitmessungen fest, um die Feuerungsleistung von Gas-Einrichtungen in privaten Haushalten zu beurteilen, die im Handel erhältliche Brennstoffe verfeuern. ANMERKUNG 5 EN 50379 2 [5] gilt für Geräte, die für gesetzlich bzw. durch Regelwerke festgelegte Messungen verwendet werden. In mehreren europäischen Ländern existieren nationale Bestimmungen für das Betriebsverhalten von Feuerungsanlagen (siehe EN 50379-1:2012, informativen Anhang A [4]). Da die Ergebnisse dieser Messungen gesetzlich festgelegte Maßnahmen zur Folge haben, gibt es strenge Anforderungen an die benutzten Geräte (siehe EN 50379 1:2012, normativen Anhänge B und C [4]). ANMERKUNG 6 EN 50379 3 [6] gilt für Geräte, die nicht für gesetzlich geregelte Anwendungen vorgesehen sind. Sie beinhaltet verminderte Anforderungen tragbare elektrische Geräte ANMERKUNG 7 Diese Technische Spezifikation behandelt die Bestimmung von Konzentrationen von den Verbrennungsgasen Kohlenmonoxid (CO), Kohlendioxid (CO2) und / oder Sauerstoff (O2) in Verbrennungsprodukten von gasbefeuerten Einrichtungen. Verbrennungsprodukte von gasbefeuerten Einrichtungen enthalten Stickoxide (NOx), überwiegend Stickstoffmonoxid (NO) und Stickstoffdioxid (NO2). Diese Technische Spezifikation behandelt nicht die Messung von Verbrennungsprodukten wie NOx und Aldehyden.

Appareils électriques portatifs de mesure des paramètres des gaz de combustion - Guide d'utilisation lié à la procédure de mise en service, d’entretien et de maintenance des appareils à gaz

Prenosni električni aparati za meritve parametrov zgorevalnih dimnih plinov - Vodilo za njihovo uporabo pri izročanju v obratovanje, servisiranju in vzdrževanju plinskih kotlov

Ta tehnična specifikacija podaja vodilo glede izbire, uporabe in vzdrževanja prenosnih električnih aparatov v skladu s standardom EN 50379-1 [4] in standardom EN 50379-2 [5] ali EN 50379-3 [6] za:
a) meritve parametrov zgorevalnih dimnih plinov aparatov v stanovanjskih objektih pri zgorevanju plinov prve, druge in tretje družine z naslednjim opisom:
1) plinski kotli vrst A, B in C, razen tisti, za katere navodila za plinske kotle (ali zasnova, glej 7.3.2.1) prepovedujejo vzorčenje zgorevanja, ter
2) vsi plinski kotli, za katere proizvajalec posreduje namensko točko vzorčenja zgorevanja ali posebna navodila za vzorčenje,
b) uporabo kot diagnostični instrument za pomoč izvajalcu:
1) pri potrjevanju zadovoljivega zgorevanja v času izročanja v obratovanje v skladu z navodili za plinske kotle oziroma nacionalnimi ali lokalnimi predpisi oz. standardi;
2) pri potrjevanju zadovoljivega zgorevanja v času servisiranja v skladu z nacionalnimi ali lokalnimi predpisi oz. standardi ali po servisiranju v skladu z navodili za plinske kotle;
3) pri potrjevanju zadovoljivega zgorevanja po vzdrževanju v skladu z navodili za plinske kotle oziroma nacionalnimi ali lokalnimi predpisi oz. standardi.
OPOMBA 1: Razvrstitev plinskih kotlov v vrste A, B in C je opredeljena v točki 3.1.2 in podrobneje opisana v standardu CEN/TR 1749 [2].
OPOMBA 2: Obstoječi nacionalni ali lokalni predpisi oz. standardi, ki so v navzkrižju z vodilom v tej tehnični specifikaciji, imajo prednost pred njim.
OPOMBA 3: Namen te tehnične specifikacije ni predlagati, da se prenosni električni analizatorji zgorevalnih dimnih plinov uporabljajo kot nadomestek za običajno servisiranje in vzdrževanje, izvedeno v skladu z navodili za plinske kotle. Točka 9 opisuje način uporabe analizatorjev skupaj za navodili za plinske kotle.
OPOMBA 4: Standard EN 50379-1 [4] določa splošne zahteve za izdelavo, preskušanje in delovanje prenosnih odčitovalnih naprav za preverjanje učinkovitosti zgorevanja aparatov v stanovanjskih objektih z uporabo komercialno dostopnih goriv.
OPOMBA 5: Standard EN 50379-2 [5] zajema aparate, ki se uporabljajo za zakonsko določene meritve. V več evropskih državah obstajajo pravne zahteve za delovanje grelnih aparatov (glej standard EN 50379-1:2012, informativni dodatek A [4]). Pravne posledice, ki izhajajo iz merjenja delovanja, ustvarjajo stroge zahteve za aparat v uporabi (glej standard EN 50379-1:2012, normativna dodatka B in C [4]).
OPOMBA 6: Standard EN 50379-3 [6] zajema aparate, namenjene za vrste uporabe, ki niso zakonsko določene, s čimer se zmanjšajo zahteve za delovanje prenosnih električnih aparatov.
OPOMBA 7: Ta tehnična specifikacija obravnava določevanje ravni zgorevalnih plinov (ogljikov monoksid (CO), ogljikov dioksid (CO2) in/ali kisik (O2)) v produktih zgorevanja iz plinskih kotlov. Produkti zgorevanja iz plinskih kotlov bodo vsebovali dušikove okside (NOX), predvsem dušikov monoksid (dušikov oksid (NO)) in dušikov dioksid (NO2). Ta tehnična specifikacija ne obravnava meritev produktov zgorevanja, kot so dušikovi oksidi in aldehidi.

General Information

Status
Published
Publication Date
15-Aug-2016
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
13-Jul-2016
Due Date
17-Sep-2016
Completion Date
16-Aug-2016

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SLOVENSKI STANDARD
SIST-TS CLC/TS 50612:2016
01-oktober-2016
1DGRPHãþD
SIST-TS CLC/TS 50612:2014
3UHQRVQLHOHNWULþQLDSDUDWL]DPHULWYHSDUDPHWURY]JRUHYDOQLKGLPQLKSOLQRY

9RGLOR]DQMLKRYRXSRUDERSULL]URþDQMXYREUDWRYDQMHVHUYLVLUDQMXLQY]GUåHYDQMX

SOLQVNLKNRWORY

Portable electrical apparatus for the measurement of combustion flue gas parameters -

Guide to their use in the process of commissioning, servicing and maintaining gas fired

appliances
Appareils électriques portatifs de mesure des paramètres des gaz de combustion -

Guide d'utilisation lié à la procédure de mise en service, d’entretien et de maintenance

des appareils à gaz
Ta slovenski standard je istoveten z: CLC/TS 50612:2016
ICS:
13.040.40 (PLVLMHQHSUHPLþQLKYLURY Stationary source emissions
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
SIST-TS CLC/TS 50612:2016 en

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

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SIST-TS CLC/TS 50612:2016
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SIST-TS CLC/TS 50612:2016
TECHNICAL SPECIFICATION CLC/TS 50612
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
July 2016
ICS 13.040.40; 91.140.10 Supersedes CLC/TS 50612:2013
English Version
Portable electrical apparatus for the measurement of combustion
flue gas parameters - Guide to their use in the process of
commissioning, servicing and maintaining gas fired appliances
Appareils électriques portatifs de mesure des paramètres To be completed
des gaz de combustion - Guide d'utilisation lié à la
procédure de mise en service, d'entretien et de
maintenance des appareils à gaz
This Technical Specification was approved by CENELEC on 2016-04-18.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to make the TS available promptly

at national level in an appropriate form. It is permissible to keep conflicting national standards in force.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. CLC/TS 50612:2016 E
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CLC/TS 50612:2016
Contents Page

European foreword ............................................................................................................................................. 4

Introduction ......................................................................................................................................................... 5

1 Scope ...................................................................................................................................................... 6

2 Normative references ............................................................................................................................ 6

3 Terms and definitions ........................................................................................................................... 7

3.1 Type of equipment ................................................................................................................................. 7

3.2 Place of installation ............................................................................................................................... 7

3.3 Type of person ....................................................................................................................................... 7

3.4 Action of the operative.......................................................................................................................... 8

3.5 Condition of the appliance ................................................................................................................... 8

4 Competence ........................................................................................................................................... 9

5 Selection of portable electrical combustion flue gas analyser ........................................................ 9

6 Care, use and maintenance of portable electrical combustion flue gas analyser........................ 10

6.1 Before use ............................................................................................................................................ 10

6.2 Sensor check ....................................................................................................................................... 11

6.3 Safety warning ..................................................................................................................................... 11

6.4 Inappropriate use ................................................................................................................................ 11

6.5 Sensor cross-sensitivity ..................................................................................................................... 11

7 Determination of the combustion performance of an appliance .................................................... 11

7.1 General ................................................................................................................................................. 11

7.2 Type A appliances ............................................................................................................................... 12

7.2.1 Cookers ................................................................................................................................................ 12

7.2.2 Refrigerators ........................................................................................................................................ 13

7.2.3 Gas lamps ............................................................................................................................................ 13

7.2.4 Space heaters ...................................................................................................................................... 13

7.2.5 Water heaters ....................................................................................................................................... 13

7.3 Type B appliances ............................................................................................................................... 13

7.3.1 Boilers and water heaters ................................................................................................................... 13

7.3.2 Space heaters ...................................................................................................................................... 14

7.3.3 Warm air heaters ................................................................................................................................. 14

7.4 Type C appliances ............................................................................................................................... 15

8 Measured combustion values above the action level (see 3.4.7) ................................................... 15

9 Procedure for use of a portable electrical combustion flue gas analyser at the time of

commissioning, servicing or maintenance ...................................................................................... 16

9.1 General ................................................................................................................................................. 16

9.2 Determination of the combustion performance at the time of commissioning ............................ 17

9.3 Determination of the level of servicing required and subsequent actions ................................... 17

9.4 Confirmation of satisfactory combustion following servicing in accordance with the

appliance instructions (Figure 1) ....................................................................................................... 18

9.5 Confirmation of satisfactory combustion following maintenance (Figure 2) ............................... 19

10 Completion report ............................................................................................................................... 22

Annex A (informative) Portable electrical combustion flue gas analysers ................................................. 23

Annex B (informative) Completion report ....................................................................................................... 24

Annex C (informative) Multi-hole sample probes .......................................................................................... 26

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CLC/TS 50612:2016

Annex D (informative) Flue/draught diverter configurations for warm air heaters .................................... 27

Bibliography ...................................................................................................................................................... 28

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CLC/TS 50612:2016
European foreword

This document (CLC/TS 50612:2016) has been prepared by Technical Committee CLC/TC 216 “Gas

detectors”.
This document supersedes CLC/TS 50612:2013.

CLC/TS 50612:2016 includes the following significant technical changes with respect to CLC/TS 50612:2013:

The Scope of the 2013 guidance was limited to the use of portable electrical apparatus for the measurement

of combustion flue gas parameters of gas-fired central heating boilers. The Scope of the 2016 guidance has

been expanded to cover their use with gas-fired central heating boilers, domestic gas-fired air heaters,

independent gas-fired space heaters, gas cooking appliances and domestic gas-fired water heaters.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights.

The following Technical Committees have collaborated in the development of this document:

• CEN/TC 109 “Central heating boilers using gaseous fuels",
• CEN/TC 62 “Independent gas-fired space heaters”,
• CEN/TC 49 “Gas cooking appliances”, and
• CEN/TC 48 “Domestic gas-fired water heaters”.

NOTE Commentary text is presented in italic type. It gives background information and does not constitute a

normative element.
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CLC/TS 50612:2016
Introduction

This Technical Specification is intended as a guide for operatives who, in the course of their professional

activities, are required to measure combustion parameters of gas-fired appliances in domestic premises using

combustion flue gas analysers during any or all of the commissioning, servicing and maintenance of such

appliances.
It is intended to complement the following through a generic approach:

a) the gas appliance commissioning, servicing and maintenance instructions, and/or

b) national or local regulations or standards.

NOTE 1 A Technical Specification is announced and made available at national level, but conflicting national standards

can continue to exist.

NOTE 2 Existing national or local regulations or standards conflicting with the guidance in this Technical Specification

have precedence over this guidance.

It is not intended that a combustion gas analysis be used as a substitute for commissioning, servicing and/or

maintenance carried out in accordance with the gas appliance instructions. It is meant to be regarded and

used as a diagnostic tool to help in the process of carrying out these activities to ensure the safe and efficient

operation of the appliance installation.

In the preparation of this Technical Specification, it has been assumed that the execution of its provisions will

be entrusted to competent operatives (see Clause 4) for whose use it has been produced.

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CLC/TS 50612:2016
1 Scope

This Technical Specification provides guidance on the selection, use and maintenance of portable electrical

apparatus conforming to EN 50379-1 [4] and EN 50379-2 [5] or EN 50379-3 [6] to:

a) measure combustion flue gas parameters of appliances in domestic premises burning 1st, 2nd or 3rd

family gases of the following description:

1) Type A, Type B and Type C gas-fired appliances, except those appliances where the appliance

instructions (or design, see 7.3.2.1), prohibit combustion sampling, and,

2) all gas-fired appliances for which the appliance manufacturer has provided a purpose-designed

combustion sampling point or specific sampling instructions,
b) use as a diagnostic instrument to assist an operative:

1) in confirming satisfactory combustion at the time of commissioning, in accordance with appliance

instructions or national or local regulations or standards;

2) in confirming satisfactory combustion at the time of servicing in accordance with national or local

regulations or standards or following servicing in accordance with appliance instructions;

3) in confirming satisfactory combustion following maintenance, in accordance with appliance

instructions or national or local regulations or standards.

NOTE 1 Type A, Type B and Type C classification of gas-fired appliances are defined in 3.1.2 and more fully in

CEN/TR 1749 [2].

NOTE 2 Existing national or local regulations or standards conflicting with the guidance in this Technical Specification

have precedence over this guidance.

NOTE 3 It is not the intention of this Technical Specification to suggest that portable electrical combustion flue gas

analysers are to be used as a substitute for normal service and maintenance carried out in accordance with the gas

appliance instructions. Clause 9 describes how analysers can be used in conjunction with the appliance instructions.

NOTE 4 EN 50379–1 [4] specifies general requirements for the construction, testing and performance of portable spot

reading apparatus designed to check the combustion performance of appliances in domestic premises using commercially

available fuels.

NOTE 5 EN 50379–2 [5] is for apparatus intended to be used for statutory measurements. In several European

countries, legal requirements exist for the performance of heating appliances (see EN 50379–1:2012,

informative Annex A [4]). Legal consequences resulting from performance measurements makes for strict requirements for

the apparatus used (see EN 50379–1:2012, normative Annexes B and C [4]).

NOTE 6 EN 50379–3 [6] is for apparatus intended to be used for non-statutory applications, which allows for reduced

performance requirements for the portable electrical apparatus.

NOTE 7 This Technical Specification deals with the determination of levels of combustion gases carbon monoxide

(CO), carbon dioxide (CO ) and/or oxygen (O ) in combustion products from gas-fired appliances. Combustion products

2 2

from gas-fired appliances will contain nitrogen oxides (NO ), predominantly nitrogen monoxide (nitric oxide, NO) and

nitrogen dioxide (NO ). This Technical Specification does not deal with the measurement of combustion products such as

NO and aldehydes.
2 Normative references
Not applicable.
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CLC/TS 50612:2016
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 Type of equipment
3.1.1
portable electrical combustion flue gas analyser

apparatus that will detect and measure the concentrations of components in combustion gases and clearly

display the result

Note 1 to entry: Clause 5 and Annex A provides information on suitable portable electrical combustion flue gas

analysers.
3.1.2
gas-fired appliance

unit of the following type placed on the market as a complete appliance designed to deliver safely and

effectively the service claimed from burning gaseous fuel:

— Type A – appliance not intended for connection to a flue or to a device for evacuating the products of

combustion to the outside of the room in which the appliance is installed;

— Type B - appliance intended to be connected to a flue that evacuates the products of combustion to the

outside of the room in which the appliance is installed; the combustion air is drawn directly from the room;

— Type C – appliance in which the combustion circuit (air supply, combustion chamber, heat exchanger and

evacuation of the products of combustion) is sealed with respect to the room in which the appliance is

installed.

Note 1 to entry: Types A, B and C classifications of gas-fired appliances are described fully in CEN/TR 1749 [2].

3.2 Place of installation
3.2.1
domestic premises

house or building, or part thereof, being the place of residence or home of a household, family or person

3.2.2
appliance compartment

enclosure specifically constructed or adapted to accommodate one or more gas-burning appliance

3.3 Type of person
3.3.1
customer

occupier of the domestic premises, owner of the domestic premises, and person with the authority, for the

time being, to take appropriate action in relation to any gas appliance/fitting therein

3.3.2
operative

person who is competent (as described in 3.4.8 and Clause 4) in respect of work (3.4.1) associated with the

inspection, commissioning, servicing or maintenance of the particular gas-fired appliance and the use of a

portable electrical combustion flue gas analyser
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CLC/TS 50612:2016
3.4 Action of the operative
3.4.1
work

installation, maintenance, servicing, removal, permanent adjustment, repair, changing the position, alteration

or renewal of a gas appliance or fitting, or purging of air or gas
3.4.2
servicing

regular and planned (usually annual) activity carried out on an appliance to check and ensure that it is working

safely and correctly
3.4.3
maintenance
unplanned work carried out on an appliance to repair any defect
3.4.4
safety check

examinations and tests to ensure that a gas appliance and any associated chimney operate safely

Note 1 to entry: Some countries have mandatory safety checks written into their national or local regulations.

3.4.5
full strip and clean

work involving, but not exclusively, the gaining of access to the heat exchanger and burner assemblies and

the removal of any corrosion products (such as shale) or debris, which might impair the safe and efficient

operation of the appliance
3.4.6
satisfactory combustion

appliance combustion measured values that meet the requirements detailed in the gas appliance instructions

and/or national or local regulations or standards
3.4.7
action levels

appliance measured combustion values as detailed in the gas appliance instructions and/or national or local

regulations or standards, at which corrective action should be taken
Note 1 to entry: See Clause 8.
3.4.8
competence

ability gained by appropriate training, knowledge and experience to supervise or carry out the work being

undertaken in a safe and appropriate manner
Note 1 to entry: See Clause 4.
3.5 Condition of the appliance
3.5.1
shaling

progressive corrosion of the flueways of a cast iron heat exchanger, leading to the development of rust flakes

Note 1 to entry: Shaling can block the heat exchanger over time.
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CLC/TS 50612:2016
3.5.2
gas family

group of gaseous fuels with similar burning behaviour linked together by a range of Wobbe indices

Note 1 to entry: See Clause 8, f), and EN 437:2003+A1:2009, Table 1 [1].
3.5.3
gas quality

stated composition and energy content of the gas supplied, where the energy content is expressed as a range

of Wobbe indices
Note 1 to entry: See Clause 8, f) and Commentary on Clause 8.
4 Competence

For the scope of this Technical Specification, competence shall include, as a minimum:

a) access to, and appropriate understanding of, the appliance instructions specific to the appliance being

worked on;

b) knowledge of any relevant national or local regulations pertaining to the work being undertaken;

c) knowledge regarding the selection (Clause 5), care, use and maintenance (Clause 6) of portable

electrical combustion flue gas analysers;

d) knowledge of the properties of the fuel gas for the appliance, the resulting combustion process, the

possible dangers resulting from the combustion process and the precautions to take;

e) knowledge of the electrical services associated with the installation and operation of the appliance being

worked on, the dangers they can give rise to and the precautions to take.

Commentary on Clause 4: Competence requires sufficient knowledge, practical skill and experience to

carry out the job in hand safely, with due regard to good working practice. The installation should be left in a

safe condition for use. Knowledge should be kept up-to-date with changes in law, technology and safe

working practice.

Some countries require independently assessed and documented proof of competence in accordance with

national or local regulations.
5 Selection of portable electrical combustion flue gas analyser

For the determination of CO, CO and/or O in the combustion products from gas-fired appliances, an

2 2
analyser should conform to:

a) EN 50379-2 [5] for statutory inspections and assessment of combustion performance,

b) EN 50379-2 [5] or EN 50379-3 [6] for non-statutory assessment of combustion performance during

commissioning and following servicing and maintenance.

NOTE 1 To provide proof of compliance with EN 50379 series, EN 50379–1 [4] requires that the analyser manufacturer

provide a durable label on the apparatus, or moulded into the casing, carrying either the number of the European Standard

or the third party certification.
The analyser should have as a minimum the following measuring capabilities:
— oxygen (O ) and/or CO , and
2 2
— CO.
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NOTE 2 To determine CO levels, some analysers measure O and calculate CO (see Annex A).

2 2 2

Where appliance instructions require oxygen measurement for the excess air factor, the analyser should use

an O sensor. In this case, the analyser manufacturer should be consulted to establish that the O sensor is

2 2
either insensitive to CO or compensated for CO .
2 2

Commentary on Clause 5: Appliance manufacturers can require the measurement of room temperature,

flue gas temperature, air inlet temperature, heating water flow temperature and chimney draught when

measuring combustion values in order to provide “benchmark” reference conditions for comparison purposes

in the event of subsequent investigation.
Consequently, some analysers have the ability to:
— measure temperature,
— measure pressure (draught),
— automatically record measured values (see Clause 10).

National or local regulations or standards can also require the ability to measure flue gas temperature and/or

other parameters.
6 Care, use and maintenance of portable electrical combustion flue gas analyser
6.1 Before use

Analysers should be treated with care, and used and maintained in accordance with the analyser instructions.

Analysers should only be used by a person who:
— is competent in their use, and

— has an understanding of the results obtained and an awareness of the necessary safety actions detailed

in the gas appliance instructions and/or national or local regulations or standards.

Before using the analyser, it is essential to read operator manuals and, as appropriate, ensure that:

a) the batteries are correctly inserted, charged and not leaking,
b) the analyser has a current proof of calibration:

NOTE The analyser instructions or specific national or local regulations or standards will identify requirements

for verifying the proof of calibration of the analyser.

Commentary on b): Some analysers are designed to accept pre-calibrated sensor modules; however, it

should not be assumed that fitting a pre-calibrated sensor module will automatically guarantee accurate

calibration of the complete instrument, i.e. in combination with the probe.
c) the display is functioning correctly;

d) the analyser is zeroed and purged in accordance with the analyser instructions;

e) the pump is working;
f) filters and water traps are clean and dry;
g) the sensor is working correctly, see 6.2;

h) the sample tubing from the sample probe to the analyser is free from leaks and damage.

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6.2 Sensor check

Analysers read very low levels, near to zero. Since they can fail to give any reading due to sensor failure, the

sensor should be checked in accordance with the analyser instructions to determine whether it is operating

correctly.
6.3 Safety warning
An analyser should only be used in well-ventilated locations.

Commentary on 6.3: An analyser extracts combustion gases that can be toxic in relatively low

concentrations. These gases are exhausted from the instrument. Operatives should consider their own safety

as well as that of the occupants and ensure they are not in atmospheres in which potentially dangerous levels

of CO are present.
6.4 Inappropriate use

Analysers should not be used to identify leakage of combustion products from the appliance combustion

circuit except where their use for this purpose is detailed in the appliance instructions.

NOTE For Type B appliances particularly, the suction from the analyser can inadvertently induce spillage of

combustion products that could be incorrectly identified as a leakage of combustion products.

6.5 Sensor cross-sensitivity

An analyser’s sensor response for CO and CO can be affected by the presence of other gases and vapours

that can come, for example, from cooking activities or common household materials such as cleaning fluids,

polishes and paints. This sensor cross sensitivity can lead to inaccurate readings.

If the analyser instructions do not advise what substances could interfere with analyser operation or reliability

in the short or long term, the analyser manufacturer should be consulted.
7 Determination of the combustion performance of an appliance
7.1 General

The analyser should be switched on and prepared for use in accordance with the analyser instructions.

Unless national or local regulations or standards specify differently:

a) If a purpose designed combustion sampling point is provided on the appliance and/or specific guidance

on carrying out combustion checks is provided in the appliance instructions, the combustion checks

should be carried out in accordance with the appliance instructions.

b) Except where the appliance instructions prohibit combustion sampling, (see 7.3.2.1), if a purpose

designed combustion sampling point and/or specific guidance on carrying out combustion checks is not

provided in the appliance instructions, the relevant procedure in 7.2, 7.3 or 7.4 should be used.

c) The combustion measured values should be recorded when the appliance has been operating at the

maximum rated input for 30 min or when the reading is steady or decreasing, whichever is the least time.

To set the appliance at its maximum rated input, the method specified in the appliance instructions should

be followed.

For many applications, the open-ended sampling probe and connection tubing usually supplied with an

analyser will be suitable to collect a thoroughly mixed and representative sample of the combustion products.

However, where this type of probe and/or connection tubing is not suitable, the analyser manufacturer should

be contacted to obtain a suitable probe and/or connection tubing specification.

Guidance on satisfactory measured combustion values is normally given in the appliance instructions, or

national or local regulations or standards. In the event that there is no information in the appliance instructions

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or relevant information in the national or local regulations or standards, the appliance manufacturer should be

contacted.

If the measured combustion values are unsatisfactory then the appropriate action recommended in the

appliance instructions and Clause 9 should be carried out. Commentary on Clause 8 also provides some

suggestions for possible causes of unsatisfactory measured combustion values.

It should be noted that certain components in the appliance could contain volatile compounds for which it will

be necessary to “burn off the newness” before reliable measurements can be obtained. Examples include

insulation and adhesives. Consequently, if such a component is fitted as a replacement, it will be necessary to

burn off the newness before a reliable measurement can be
...

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