SIST-TS CLC/TS 50612:2014
(Main)Portable electrical apparatus for the measurement of combustion flue gas parameters - Use in the process of commissioning, servicing and maintaining gas fired boilers
Portable electrical apparatus for the measurement of combustion flue gas parameters - Use in the process of commissioning, servicing and maintaining gas fired boilers
CLC/TS 50612 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] designed to measure combustion flue gas parameters of Type B and Type C gas-fired central heating boilers (hereafter referred to as boilers) using 1st, 2nd or 3rd family gases in domestic premises as a diagnostic instrument to assist an operative: a) in confirming satisfactory combustion at the time of commissioning, in accordance with appliance instructions or national or local regulations or standards; b) 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; c) in confirming satisfactory combustion following maintenance, in accordance with appliance instructions or national or local regulations or standards.
Tragbare elektrische Geräte zur Messung von Verbrennungsparametern - Einsatz für Inbetriebnahme, Wartung und Instandsetzung von gasbefeuerten Heizungsanlagen
Appareils électriques portatifs pour la mesure des paramètres des gaz de combustion dans les conduits d'évacuation - Utilisation dans le processus de mise en service, entretien et maintenance des chaudières à gaz
Prenosni električni aparati za meritve parametrov zgorevalnih dimnih plinov - Uporaba pri izročanju v obratovanje, servisiranju in vzdrževanju plinskih kotlov
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST-TS CLC/TS 50612:2014
01-marec-2014
3UHQRVQLHOHNWULþQLDSDUDWL]DPHULWYHSDUDPHWURY]JRUHYDOQLKGLPQLKSOLQRY
8SRUDEDSULL]URþDQMXYREUDWRYDQMHVHUYLVLUDQMXLQY]GUåHYDQMXSOLQVNLKNRWORY
Portable electrical apparatus for the measurement of combustion flue gas parameters -
Use in the process of commissioning, servicing and maintaining gas fired boilers
7UDJEDUHHOHNWULVFKH*HUlWH]XU0HVVXQJYRQ9HUEUHQQXQJVSDUDPHWHUQ(LQVDW]IU
,QEHWULHEQDKPH:DUWXQJXQG,QVWDQGVHW]XQJ
YRQJDVEHIHXHUWHQ+HL]XQJVDQODJHQ
Appareils électriques portatifs pour la mesure des paramètres des gaz de combustion
dans les conduits d'évacuation - Utilisation dans le processus de mise en service,
entretien et maintenance des chaudières à gaz
Ta slovenski standard je istoveten z: CLC/TS 50612:2013
ICS:
13.040.40 (PLVLMHQHSUHPLþQLKYLURY Stationary source emissions
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
SIST-TS CLC/TS 50612:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST-TS CLC/TS 50612:2014
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SIST-TS CLC/TS 50612:2014
TECHNICAL SPECIFICATION
CLC/TS 50612
SPÉCIFICATION TECHNIQUE
December 2013
TECHNISCHE SPEZIFIKATION
ICS 13.040.40; 91.140.10
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 central heating boilers
Appareils électriques portatifs pour la Tragbare elektrische Geräte zur Messung
mesure des paramètres des gaz de von Verbrennungsparametern -
combustion dans les conduits Einsatz für Inbetriebnahme, Wartung und
d'évacuation - Instandsetzung von gasbefeuerten
Utilisation dans le processus de mise en Heizungsanlagen
service, entretien et maintenance des
chaudières à gaz
This Technical Specification was approved by CENELEC on 2013-11-18.
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.
CENELEC
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
© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. CLC/TS 50612:2013 E
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Contents Page
Foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
3.1 Type of equipment . 5
3.2 Place of installation . 6
3.3 Type of person . 6
3.4 Action of the operative. 6
3.5 Condition of the boiler . 7
4 Competence . 7
5 Selection of portable electrical combustion flue gas analyser . 8
6 Care, use and maintenance of portable electrical combustion flue gas analyser. 9
6.1 Before use . 9
6.2 Sensor check . 9
6.3 Safety warning . 9
6.4 Inappropriate use . 10
6.5 Sensor cross-sensitivity . 10
7 Determination of the combustion performance of an appliance . 10
7.1 General . 10
7.2 Type B appliances . 11
7.2.1 General . 11
7.2.2 Boilers whose combustion products evacuation design incorporates a draught diverter . 11
7.2.3 Boilers whose combustion products evacuation design do not incorporate a draught
diverter . 11
7.2.4 Appliances in compartments . 11
7.3 Type C appliances . 11
8 Measured combustion values above the action level (see 3.4.7) . 12
9 Procedure for use of a portable electrical combustion flue gas analyser at the time of
commissioning, servicing or maintenance . 13
9.1 General . 13
9.2 Determination of the combustion performance at the time of commissioning . 14
9.3 Determination of the level of servicing required and subsequent actions . 14
9.4 Confirmation of satisfactory combustion following servicing in accordance with the
appliance instructions (Figure 1) . 14
9.5 Confirmation of satisfactory combustion following maintenance (Figure 2) . 16
10 Completion report . 19
Annex A (informative) Portable electrical combustion flue gas analysers . 20
Annex B (informative) Completion report . 21
Bibliography . 23
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Foreword
This document (CLC/TS 50612:2013) has been prepared by CLC/TC 216 "Gas detectors" together with
CEN/TC 109 "Central heating boilers using gaseous fuels".
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.
This document has been prepared under a mandate given to CENELEC by the European Commission and
the European Free Trade Association.
NOTE Commentary text is presented in italic type. It gives background information and does not constitute a
normative element.
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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 central heating boilers 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 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
may 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 appliance instructions. It is to be regarded and used as a
diagnostic tool to confirm satisfactory combustion to help in the process of carrying out these activities to
ensure the safe and efficient operation of the boiler 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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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] designed to measure
combustion flue gas parameters of Type B and Type C gas-fired central heating boilers (hereafter referred to
st nd rd
as boilers) using 1 , 2 or 3 family gases in domestic premises as a diagnostic instrument to assist an
operative:
a) in confirming satisfactory combustion at the time of commissioning, in accordance with appliance
instructions or national or local regulations or standards;
b) 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;
c) in confirming satisfactory combustion following maintenance, in accordance with appliance instructions or
national or local regulations or standards.
NOTE 1 Type B and Type C classification of gas-fired appliances are described in CEN/TR 1749 [1].
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 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 heating 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 informative Annex A of
EN 50379-1:2012 [4]). Legal consequences resulting from performance measurements makes for strict requirements for
the apparatus used (see normative Annexes B and C of EN 50379-1:2012 [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 such as carbon
monoxide (CO) and carbon dioxide (CO ) in combustion products from boilers. Combustion products from boilers will
2
contain nitrogen oxides (NO ), predominantly nitrogen monoxide (nitric oxide, NO) and nitrogen dioxide (NO ). This
X 2
Technical Specification does not deal with the measurement of combustion products such as NO and aldehydes.
X
2 Normative references
Not applicable.
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 provide information on suitable portable electrical combustion flue gas analysers.
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3.1.2
boiler
unit placed on the market as a complete appliance designed to deliver safely and effectively the heating
service claimed from burning gaseous fuel
3.2 Place of installation
3.2.1
domestic premises
any 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 appliances
3.3 Type of person
3.3.1
customer
occupier of the domestic premises, the owner of the domestic premises and any person with 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 a boiler and the use of a portable electrical
combustion flue gas analyser
3.4 Action of the operative
3.4.1
work
installation, commissioning, 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 an 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 boiler
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3.4.6
satisfactory combustion
appliance combustion measured values that meet the requirements detailed in the appliance instructions
and/or national or local regulations or standards
3.4.7
action levels
boiler measured combustion values as detailed in the 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 boiler
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 in time.
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 [2].
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 boiler being worked
on;
b) knowledge of any relevant national or local regulations and standards 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 boiler, 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 boiler being
worked on, the dangers they can give rise to and the precautions to take.
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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 and CO in the combustion products from boilers, an analyser should conform to
2
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 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.
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, the analyser should 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.
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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 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,
Some analysers are designed to accept pre-calibrated sensor modules; however, it should not be assumed
that fitting a pre-calibrated sensor module would automatically guarantee accurate calibration of the complete
instrument, i.e. in combination with the probe.
NOTE The analyser instructions or specific national or local regulations or standards will identify requirements for
verifying the proof of calibration of the analyser.
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.
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.
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6.4 Inappropriate use
Analysers should not be used to identify leakage of combustion products from the boiler combustion circuit
except where their use for this purpose is detailed in the appliance instructions.
NOTE For Type B boilers 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
Analyser readings for CO and CO can be affected by the presence of other gases and vapours that can
2
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 a boiler
7.1 General
The analyser should be switched on and prepared for use in accordance with the analyser instructions.
If 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.
If specific guidance on carrying out combustion checks is not provided in the appliance instructions, the
relevant procedure in 7.2 or 7.3 should be used.
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 to access the sampling point, the
analyser manufacturer should be contacted to obtain a suitable probe and/or connection tubing specification.
Unless stated differently in the appliance instructions or national or local regulations or standards, the
combustion measured values should be recorded when the boiler 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 boiler at
its maximum rated input, the method specified in the appliance instructions should be followed.
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
or relevant information in the national or local regulations or standards, the boiler 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 boiler 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 obtained.
When a new component has been fitted, the boiler should be operated at maximum rate and a combustion
reading taken after 10 min. If the measured values are unacceptable or still rising, continue sampling at
20 min intervals until a satisfactory stable level is reached or the level stabilises at an unacceptable level. For
the latter, if the level does not fall within 20 min, then a further inspection of the boiler should be made to
establish the cause of the high reading.
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7.2 Type B boilers
7.2.1 General
Unless stated differently in the appliance instructions or national or local regulations or standards, for Type B
boilers, to obtain a well-mixed representative sample the sampling probe tip should be positioned at least
200 mm into the secondary flue. This position can be achieved either by inserting the probe into the
secondary flue or where national standards allow by inserting the probe horizontally through a hole drilled into
the secondary flue and the hole sealed afterwards with an appropriate robust means that does not
compromise the integrity of the flue.
7.2.2 Boilers whose combustion products evacuation design incorporates a draught diverter
Unless stated differently in the appliance instructions or national or local regulations or standards, an open-
ended sampling probe should be positioned in the combustion products stream of the secondary flue after the
draught diverter (see 7.2.1) and its position adjusted until the highest steady state value of CO or lowest
2
steady state value of O is obtained.
2
7.2.3 Boilers whose combustion products evacuation design do not incorporate a draught diverter
Unless stated differently in the appliance instructions or national or local regulations or standards, an open-
ended sampling probe should be positioned in the combustion products outlet duct and its position adjusted
until the highest steady state value of CO or lowest steady state value of O is obtained.
2 2
7.2.4 Appliances in compartments
The combustion performance of Type B boilers installed in compartments requires the combustion products to
be sampled with the installation operating as normal, i.e. operating so that the openable servicing access to
the compartment does not provide a greater level of ventilation than usual. Sampling should therefore take
place with any door to the compartment closed.
One method of sampling is with the tubing connected between the combustion analyser and the sampling
probe passing via permanent ventilation openings associated with the installation. This will then enable the
readings to be taken from outside the compartment.
The general procedures when sampling different types of boilers in compartments should be those outlined in
7.2.1, 7.2.2 and 7.2.3.
7.3 Type C boilers
If the boiler is
...
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