prEN 267 rev

SLOVENSKI STANDARD
01-maj-2012
9HQWLODWRUVNLJRULOQLNL]DWHNRþDJRULYD
Forced draught burners for liquid fuels
Gebläsebrenner für flüssige Brennstoffe
Brûleurs à air soufflé pour combustibles liquides
Ta slovenski standard je istoveten z: prEN 267 rev
ICS:
27.060.10 *RULOQLNLQDWHNRþHLQWUGR Liquid and solid fuel burners
JRULYR
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2012
ICS 27.060.10 Will supersede EN 267:2009+A1:2011
English Version
Forced draught burners for liquid fuels
Brûleurs à air soufflé pour combustibles liquides Gebläsebrenner für flüssige Brennstoffe
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 47.

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, Romania, 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

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 267 rev:2012: E
worldwide for CEN national Members.

prEN 267:2012 (E)
Contents Page
Foreword .5
Introduction .6
1 Scope .7
2 Normative references .7
3 Terms and definitions . 11
3.1 General definitions . 11
3.2 Fuel mass flow rate and performance . 11
3.3 Combustion chamber, burner head and test rig . 12
3.4 Composition of the gaseous combustion products . 13
3.5 Adjusting, control and safety devices . 14
3.6 Sequencing . 15
3.7 Diagrams . 17
4 Classification, constructional and operational requirements – safety requirements and/or
protective measures . 17
4.1 Types of atomisation . 17
4.2 Methods of control of automatic or semi-automatic oil burners . 17
4.3 Means of ignition . 18
4.4 Construction . 18
4.5 Equipment . 20
4.6 Functional and operational requirements . 26
4.7 Reset of burners firing into the open air shall only be done according a).Working diagram
and test diagram . 30
4.8 Combustion products quality . 32
4.9 Machine safety requirements and/or protective measures . 35
5 Testing . 35
5.1 General . 35
5.2 Test room . 36
5.3 Test rig . 36
5.4 Measuring equipment . 41
5.5 Measuring accuracy . 43
5.6 Test conditions . 43
5.7 Test programme . 44
5.8 Replacement of individual parts and equivalent components . 51
6 Marking and labelling . 51
6.1 General . 51
6.2 Data plate . 52
6.3 Other marking . 52
6.4 Instructions for installation, adjustment, maintenance and operation . 52
6.5 Packaging . 53
Annex A (normative) Smoke number . 54
A.1 Apparatus . 54
A.2 Smoke measuring . 54
A.3 Determination of the smoke number . 54
Annex B (normative) Emission measurements and corrections . 55
B.1 Emission measurements . 55
B.2 Correction of the influence of combustion air temperature and humidity on NOx-
emissions . 55
B.3 Correction of the influence of the nitrogen content of fuel oil in case of NO -emissions . 55
X
prEN 267:2012 (E)
Annex C (informative) Conversion factors . 57
Annex D (normative) FID measuring method for recording the unburned hydrocarbons . 58
D.1 Measuring system . 58
D.2 Starting . 58
Annex E (informative) Conformity evaluation . 59
E.1 Test laboratories and test samples, procedure . 59
E.2 Types of test and test documents for oil burners . 59
Annex F (informative) Examples for equipping of burners . 62
F.1 Burners ≤≤≤≤ 100 kg/h . 62
F.2 Burners > 100 kg/h . 64
Annex G (informative) Other fuels . 66
Annex H (informative) Specific additional requirements and limitations for use of EN 267 burners
for industrial applications . 67
H.1 Pre-heating of the combustion air . 67
H.2 Continuous working of the forced draught fan . 67
H.3 Variable excess of combustion air . 67
H.4 Burner with spark ignition . 67
H.5 Air filtering . 67
H.6 Electrical equipment and EMC-compatibility . 67
Annex I (informative) Check of the air proving device . 68
Annex J (normative) Machine related hazards - additional safety requirements and/or protective
measures . 69
J.1 General . 69
J.2 List of significant hazards . 69
J.3 Safety requirements and /or protective measures . 69
J.4 Verification of machine safety requirements and/or protective measures . 72
J.5 Information for use . 73
Annex K (normative) Additional requirements for burners with pressurised parts and burners
firing pressurised bodies as defined in the Pressure Equipment Directive (PED) 97/23/EC . 74
K.1 General . 74
K.2 Design . 74
K.3 void . 74
K.4 Pressurised parts . 74
K.5 Electrical safety and fuel line components. 75
K.6 Air proving device . 76
K.7 Automatic burner control unit . 76
K.8 General functions requirements . 76
K.9 Protection of the oil and air supply . 76
K.10 External safety limiter . 76
K.11 Design according to Annex L in conjunction with EN 60204-1 . 77
K.12 Consideration: Safety life cycle . 78
K.13 Tests of pressurised parts . 79
K.14 Marking . 80
K.15 Instructions for installation, adjustment, maintenance and operation . 80
Annex L (normative) Electrical requirements – modifications to EN 60204-1 . 82
L.1 Scope . 82
L.2 Normative references . 82
L.3 Definitions . 82
L.4 General requirements . 83
L.5 Incoming supply conductor terminations and devices for disconnecting and switching off . 86
L.6 Protection against electric shock . 86
L.7 Protection of equipment . 86
L.8 Equipotential bonding. 86
L.9 Control circuits and control functions . 87
L.10 Operator interface and machine-mounted control devices- . 96
L.11 Electrical equipment (Controlgear: location, mounting, and enclosures) . 96
prEN 267:2012 (E)
L.12 Conductors and cables . 97
L.13 Wiring practices . 97
L.14 Electric motors and associated equipment . 97
L.15 Accessories and lighting . 97
L.16 Marking, warning signs and reference designations . 97
L.17 Technical documentation . 97
L.18 Verification . 98
Annex M (normative) Burner equipped to increase the efficiency . 99
Annex N (informative) Electrical interfaces for burners . 100
Annex O (informative) Environmental checklist EN 267 . 104
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC Machinery Directive . 105
Annex ZB (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 97/23/EC Pressure Equipment Directive (PED) . 106
Bibliography . 113

prEN 267:2012 (E)
Foreword
This document (prEN 267:2012) has been prepared by Technical Committee CEN/TC 47 “Atomizing oil
burners and their components - Function - Safety - Testing”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 267:2009+A1:2009.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA and ZB, which is an integral part of this
document.
According to EN 267:2009 and its amendment A1 the following fundamental changes are given:

Based on ISO 22968 where different to EN 267 such as
Flow rate from 100 kg / h to 30 kg/h
Update of definitions
Electrical interfaces for burners
Modification
Test and working diagram NO emission calculation
X
Substitution of EN 50156-1 by EN 60204-1 to include international available requirements for
the electrical safety of machines
Annex J is adapted to the new ISO EN 12100 which is substituting EN 1050 which is currently
referenced to in table J.1
New functions / requirements
remote reset
environmental aspects (environmental checklist)
increase of burner efficiency
Terminology for burner load control

prEN 267:2012 (E)
Introduction
This European Standard is primarily intended for automatic forced draught oil burners having a combustion air
fan, operated with liquid fuels, and intended to be marketed as a complete assembly.
Forced draught oil burners according to this European Standard are often used in industrial applications. The
safety principles are the same as for forced draught oil burners used for household/commercial applications.
Industrial forced draught oil burners however need to operate safely in their industrial environment and the
risks involved can differ from those for household applications. These industrial forced draught oil burners can
be characterised by the ability to withstand industrial environmental influences, like moisture, high temperature,
electrical and magnetic phenomena, vibrations, etc.
Special requirements for forced draught burners for industrial premises will be given as a note with the
addition "Industrial application".
Further information and application limitations for forced draught burners, which are used for industrial
application, are given in informative Annex H.
Principal requirements for installation of oil burners for industrial thermal processing are covered by EN 746-1
to -8.
This document is a type C standard as stated in EN ISO 12100.
The machinery concerned and the extent to which hazards, hazardous situations and hazardous events are
covered are indicated in the scope of this document.
When provisions of this type C standard are different from those which are stated in type A or B standards, the
provisions of this type C standard take precedence over the provisions of the other standard, for machines
that have been designed and built according to the provisions of this type C standard.

prEN 267:2012 (E)
1 Scope
This European Standard specifies the terminology, the general requirements for the construction and
operation of forced draught oil burners and also the provision of control and safety devices, and the test
procedure for these burners.
This European Standard applies to automatic forced draught oil burners supplied with:
 a fuel having a viscosity at the burner inlet of 1,6 mm²/s (cSt) up to 6 mm²/s (cSt) at 20 °C; and
 higher boiling petroleum based first raffinates (viscosity greater than 6 mm /s), that require preheating for
proper atomisation.
This European Standard is applicable to:
 single burners fitted to a single combustion chamber;
 single burners fitted to an appliance with additional requirements, then the relevant standard of this
appliance shall be taken into account;
 single-fuel and dual-fuel burners when operating on oil only;
 the oil function of dual-fuel burners designed to operate simultaneously on gaseous and liquid fuels, in
which case the requirements of EN 676 will also apply in respect of the gaseous fuel function.
This European Standard deals with all significant machine hazards, hazardous situations and events relevant
to burners, when they are used as intended and under conditions of misuse which are reasonably foreseeable
by the manufacturer, see Annex J.
This European Standard also deals with the additional requirements for the burners in the scope with
pressurised parts and/or firing pressurised bodies, see Annex K.
This European Standard specifies the requirements to be met by the manufacturer to ensure the safety during
commissioning, start-up, operation, shut-down and maintenance.
This European Standard does not deal with hazards due to specific applications.
This European Standard is not applicable to automatic forced draught oil burners which are manufactured
before the date of its publication as European Standard.
This European Standard deals also with forced draught burners intended to be used with biogenous fuels,
mixtures.
This European Standard deals also with burners equipped to increase the total appliance efficiency; see
Annex M.
2 Normative references
The following referenced documents are indispensable for the application 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 230, Automatic burner control systems for oil burners
EN 287-1, Qualification test of welders — Fusion welding — Part 1: Steels
EN 676:2003+A2:2008, Automatic forced draught burners for gaseous fuels
prEN 267:2012 (E)
EN 953, Safety of machinery — Guards — General requirements for the design and construction of fixed and
movable guards
EN 1044, Brazing — Filler metals
EN 1057, Copper and copper alloys — Seamless, round copper tubes for water and gas in sanitary and
heating applications
EN 1088:1995+A2:2008, Safety of machinery — Interlocking devices associated with guards — Principles for
design and selection
EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 1: Steel flanges
EN 1092-2, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 2: Cast iron flanges
EN 1092-3, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories PN
designated — Part 3: Copper alloy flanges
EN 1254-1, Copper and copper alloys — Plumbing fittings — Part 1: Fittings with ends for capillary soldering
or capillary brazing to copper tubes
EN 1254-4, Copper and copper alloys — Plumbing fittings — Part 4: Fittings combining other end connections
with capillary or compression ends
EN 1854, Pressure sensing devices for gas burners and gas burning appliances
EN 10204, Metallic products — Types of inspection documents
EN 10220, Seamless and welded steel tubes — Dimensions and masses per unit length
EN 10305-1, Steel tubes for precision applications — Technical delivery conditions — Part 1: Seamless cold
drawn tubes
EN 10305-2, Steel tubes for precision applications — Technical delivery conditions — Part 2: Welded cold
drawn tubes
EN 10305-3, Steel tubes for precision applications — Technical delivery conditions — Part 3: Welded cold
sized tubes
EN 10305-4, Steel tubes for precision applications — Technical delivery conditions — Part 4: Seamless cold
drawn tubes for hydraulic and pneumatic power systems
EN 10305-5, Steel tubes for precision applications — Technical delivery conditions — Part 5: Welded and cold
sized square and rectangular tubes
EN 10305-6, Steel tubes for precision applications — Technical delivery conditions — Part 6: Welded cold
drawn tubes for hydraulic and pneumatic power systems
EN 13611:2007, Safety and control devices for gas burners and gas burning appliances — General
requirements
EN 15035, Heating boilers — Special requirements for oil fired room sealed units up to 70 kW
EN 15036-1:2006, Heating boilers — Test regulations for airborne noise emissions from heat generators —
Part 1: Airborne noise emissions from heat generators
EN 50156-1:2004, Electrical equipment for furnaces and ancillary equipment — Part 1: Requirements for
application design and installation
prEN 267:2012 (E)
EN 60204-1: 2009 Safety of machinery - Electrical equipment of machines - Part 1: General requirements
(IEC 60204-1:2005, A1:2008, modified)
EN 60335-2-102:2005, Household and similar electrical appliances — Safety — Part 2-102: Particular
requirements for gas, oil and solid-fuel burning appliances having electrical connections
(IEC 60335-2-102:2004, modified)
EN 60529, Degrees of protection provided by enclosures (IP code) (IEC 60529:1989)
EN 60730-1, Automatic electrical controls for household and similar use — Part 1: General requirements
(IEC 60730-1:1999, modified)
EN 61310-1, Safety of machinery — Indication, marking and actuation — Part 1: Requirements for visual,
auditory and tactile signals (IEC 61310-1:2007)
EN 62061 Safety of machinery - Functional safety of safety-related electrical, electronic and programmable
electronic control systems (IEC 62061:2005)
EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions,
tolerances and designation (ISO 228-1:2000)
EN ISO 1127, Stainless steel tubes — Dimensions, tolerances and conventional masses per unit length
(ISO 1127:1992)
EN ISO 4871, Acoustics — Declaration and verification of noise emission values of machinery and equipment
(ISO 4871:1996)
EN ISO 6806, Plastics hoses and hose assemblies for suction and low-pressure discharge of petroleum
liquids — Specification (ISO 6806:1992)
EN ISO 9606-2, Qualification test of welders — Fusion welding — Part 2: Aluminium and aluminium alloys
(ISO 9606- 2:2004)
EN ISO 9606-3, Approval testing of welders — Fusion welding — Part 3: Copper and copper alloys
(ISO 9606-3:1999)
EN ISO 9606-4, Approval testing of welders — Fusion welding — Part 4: Nickel and nickel alloys
(ISO 9606-4:1999)
EN ISO 9606-5, Approval testing of welders — Fusion welding — Part 5: Titanium and titanium alloys,
zirconium and zirconium alloys (ISO 9606-5:2000)
EN ISO 11688-1:1998, Acoustics — Recommended practice for the design of low-noise machinery and
equipment — Part 1: Planning (ISO/TR 11688-1:1995)
EN ISO 12100:2010, Safety of machinery - General principles for design - Risk assessment and risk reduction
(ISO 12100:2010)
EN ISO 13849-1, Safety of machinery — Safety-related parts of control systems — Part 1: General principles
for design (ISO 13849-1:2006)
EN ISO 13857, Safety of machinery — Safety distances to prevent hazard zones being reached by upper and
lower limbs (ISO 13857:2008)
EN ISO 15609-1, Specification and qualification of welding procedures for metallic materials — Welding
procedure specification — Part 1: Arc welding (ISO 15609-1:2004)
EN ISO 15609-2, Specification and qualification of welding procedures for metallic materials — Welding
procedure specification — Part 2: Gas welding (ISO 15609-2:2001)
prEN 267:2012 (E)
EN ISO 15609-3, Specification and qualification of welding procedures for metallic materials — Welding
procedure specification — Part 3: Electron beam welding (ISO 15609-3:2004)
EN ISO 15609-4, Specification and qualification of welding procedures for metallic materials — Welding
procedure specification — Part 4: Laser beam welding (ISO 15609-4:2009)
EN ISO 15609-5, Specification and qualification of welding procedures for metallic materials — Welding
procedure specification — Part 5: Resistance welding (ISO 15609-5:2004)
EN ISO 15612, Specification and qualification of welding procedures for metallic materials — Qualification by
adoption of a standard welding procedure (ISO 15612:2004)
EN ISO 15614-7, Specification and qualification of welding procedures for metallic materials — Welding
procedure test — Part 7: Overlay welding (ISO 15614-7:2007)
EN ISO 15614-11, Specification and qualification of welding procedures for metallic materials — Welding
procedure test — Part 11: Electron and laser beam welding (ISO 15614-11:2002)
EN ISO 23553-1, Safety and control devices for oil burners and oil-burning appliances — Particular
requirements — Part 1: Shut-off devices for oil burners (ISO 23553-1:2007, including Cor 1:2009)
ISO 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances
and designation
ISO 1129, Steel tubes for boilers, super heaters and heat exchangers — Dimensions, tolerances and
conventional masses per unit length
ISO 3183, Petroleum and natural gas industries — Steel pipe for pipeline transportation systems
ISO 8217, Petroleum products — Fuels (class F) — Specifications of marine fuels
ISO 9329-1, Seamless steel tubes for pressure purposes — Technical delivery conditions — Part 1: Unalloyed
steels with specified room temperature properties
ISO 9330-1, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 1: Unalloyed
steel tubes with specified room temperature properties
ISO 9330-2, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 2: Electric
resistance and induction welded unalloyed and alloyed steel tubes with specified elevated temperature
properties
ISO 9330-3, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 3: Electric
resistance and induction welded unalloyed and alloyed steel tubes with specified low temperature properties
ISO 9330-4, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 4: Submerged
arc-welded unalloyed and alloyed steel tubes with specified elevated temperature properties
ISO 9330-5, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 5: Submerged
arc-welded unalloyed and alloyed steel tubes with specified low temperature properties
ISO 9330-6, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 6:
Longitudinally welded austenitic stainless steel tubes
ISO 23552-1, Safety and control devices for gas and/or oil burners and gas and/or oil appliances — Particular
requirements — Part 1: Fuel/air ratio controls, electronic type
prEN 267:2012 (E)
3 Terms and definitions
For the purposes of this document the terms and definitions of EN ISO 12100:2010 and the following apply.
3.1 General definitions
3.1.1
forced draught burner
burner in which the total air for combustion is supplied by means of a fan
3.1.2
automatic forced draught burner
burner that is fitted with an automatic ignition, flame monitoring and burner control devices where the ignition,
flame monitoring and the on/off switching of the burner occurs automatically
NOTE The heat input of the burner can be adjusted during operation either automatically or manually.
3.1.3
semi-automatic oil burner
burner that differs from the fully automatic burner only in that start-up of the burner is initiated manually by the
operating personnel and there is no automatic recycling after switching off the burner
3.1.4
dual-fuel burner
burner in which both gaseous and liquid fuels can be burnt either simultaneously or in succession
3.1.5
industrial application
forced draught burner utilization and operation in industrial environment
EXAMPLE industrial application in:
 the extraction,
 growth,
 refining,
 processing,
 production,
 manufacture or
 preparation of materials, plants, livestock, animal products, food or artefacts.
3.2 Fuel mass flow rate and performance
3.2.1
mass flow rate
constant mass of fuel consumed during a period of time
NOTE Mass flow rate is expressed in kilograms per hour (kg/h).
3.2.1.1
maximum mass flow rate
mass of fuel consumed during a period of time at the highest mass flow rate stated by the manufacturer
NOTE Maximum mass flow rate is expressed in kilograms per hour (kg/h).
prEN 267:2012 (E)
3.2.1.2
minimum mass flow rate
mass of fuel consumed during a period of time at the lowest mass flow rate indicated by the manufacturer
NOTE Minimum mass flow rate is expressed in kilograms per hour (kg/h).
3.2.2
heat input
Q
F
quantity of energy used in unit time corresponding to the volume or mass flow rates, the calorific value used
being either the net or gross calorific value
NOTE 1 Burners with fixed heat input or single stage burners have a single heat input.
NOTE 2 Range-rated burners have a maximum heat input and a minimum heat input declared by the manufacturer.
NOTE 3 Heat input is expressed in kilowatts (kW) or in kilograms/hour (kg/h) multiplied with the net calorific value (e.g.
11,86 kW h/kg).
3.2.2.1
maximum heat input
Q
Fmax
highest value of the heat input declared by the manufacturer
NOTE Maximum heat input is expressed in kilowatts (kW).
3.2.2.2
minimum heat input
Q
Fmin
lowest value of the heat input declared by the manufacturer
NOTE Minimum heat input is expressed in kilowatts (kW).
3.2.2.3
start heat input
Q
s
input of the burner during start-up position as a function of the maximum heat input
NOTE Start heat input is expressed in percent (%).
3.2.2.4
nominal heat input
Q
FN
value of the heat input declared by the manufacturer
NOTE 1 Fixed heat input burners have a single nominal heat input.
NOTE 2 Range-rated burners can be adjusted between the maximum nominal heat input and the minimum nominal
heat input stated by the manufacturer.
NOTE 3 Nominal heat input is expressed in kilowatts (kW).
3.3 Combustion chamber, burner head and test rig
3.3.1
combustion chamber
part of the appliance in which the combustion takes place
prEN 267:2012 (E)
3.3.2
pressure in the combustion chamber
p
F
pressure or depression, relative to atmospheric pressure, prevailing in the combustion chamber
NOTE Pressure in the combustion chamber is expressed in kilopascals (kPa).
3.3.3
length of the combustion chamber
l
distance between the face of the nozzle or the fuel outlet and the rear wall of the test flame tube or
combustion chamber
NOTE Length of the combustion chamber is expressed in metres (m).
3.3.4
diameter of the combustion chamber
d
inner diameter of the combustion chamber around the flame tube of the burner
NOTE The diameter of the combustion chamber is measured in metres (m).
3.3.5
burner head
mixing device consisting of an atomizing system and other components for the mixing of air and fuel
EXAMPLE Stabilizing disc, blast tube.
3.3.6
test rig
combustion chamber defined by the manufacturer
NOTE In the case where the manufacturer has not defined a combustion chamber, the test is carried out on test rigs
with the test flame tubes according to 5.3.
3.3.7
burner flame tube
device which hosts the mixing device and the root of the flame
3.3.8
test flame tube
cylindrical part of the test rig where the combustion takes place
3.4 Composition of the gaseous combustion products
3.4.1
content of carbon dioxide (CO )
ratio of the volume of carbon dioxide to the total volume of dry gaseous products in which it is present
NOTE The carbon dioxide content is expressed as a percentage volume fraction.
3.4.2
content of oxygen (O )
ratio of the volume of oxygen to the total volume of dry gaseous products in which it is present
NOTE The oxygen content is expressed as a percentage volume fraction.
3.4.3
content of carbon monoxide (CO)
ratio of the volume of carbon monoxide to the total volume of dry gaseous products in which it is present
prEN 267:2012 (E)
NOTE The carbon monoxide content is expressed as a volume fraction, in units of millilitres per cubic metre (ml/m3)
for measuring purposes and in milligrams per kilowatt hour (mg/kWh) related to inferior calorific value (Hi) for calculation
purposes and declaring values.
3.4.4
content of nitrogen oxides (NOx)
ratio of the combined volume of nitrogen oxides to the total volume of dry gaseous products in which they are
present
NOTE The nitrogen oxides content is expressed as a volume fraction, in units of millilitres per cubic metre (ml/m3) for
measuring purposes and in milligrams per kilowatt hour (mg/kWh) related to inferior calorific value (Hi) for calculation
purposes and declaring values.
3.4.5
content of unburned hydrocarbons
ratio of the volume of unburnt hydrocarbons to the total volume of dry gaseous products in which they are
present
NOTE It is expressed in millilitres per cubic metre (ml/m3), calculated as C3H8.
3.4.6
smoke number
sample reference, the shade of which is closest to that of the test mark
NOTE See Annex A.
3.4.7
excess air ratio
λλ
λλ
ratio between the effectively introduced quantity of air and the theoretically required quantity of air
3.5 Adjusting, control and safety devices
3.5.1
flame detector device
device by which the presence of a flame is detected and signalled
NOTE It can consist of a flame sensor, an amplifier and an element for signal transmission. These parts, with the
possible exception of the actual flame sensor, can be assembled in a single housing for use in conjunction with a
programming unit.
3.5.2
automatic burner control system
system which comprises at least a programming unit and all the elements of a flame detector device
NOTE The various functions of an automatic burner control system can be in one or more housings.
3.5.3
programming unit
programming unit reacts to signals from control and safety devices, gives control commands, controls the
start-up sequence, supervises the burner operation and causes controlled shut-down, and if necessary safety
shut-down and non-volatile lock-out
NOTE The programming unit follows a predetermined sequence of actions and always operates in conjunction with a
flame detector device.
3.5.4
safe-start check
procedure employing a protection circuit or circuits, to establish whether or not a fault in a safety system or a
flame simulating condition exists prior to start-up
prEN 267:2012 (E)
3.5.5
controlled shut-down
process by which the power to the fuel shut-off valve(s) is immediately removed before any other action takes
place, e.g. as a result of the action of a controlling function
3.5.6
non-volatile lock-out
safety shut-down condition of the system, such that a recycling can only be accomplished by a manual reset
of the system and by no other means
3.5.7
safety shut-down
process which is effected immediately following the response of a safety device or the detection of a fault in
the automatic burner control system and which puts the burner out of operation by immediately removing the
power to the fuel shut-off valve(s) and the ignition device
NOTE Safety shut-down can also occur as a result of an interruption/decrease of the power supply.
3.5.8
safety shut-off device
device that automatically cuts off the fuel supply
3.5.9
ignition-restoration
process by which, following loss of flame signal, the ignition device will be switched on again without total
interruption of the fuel supply
3.5.10
recycling
process by which, after a safety shut-down, a full start-up sequence is automatically repeated
3.5.11
pressure switch
switch which compares the actual value of a pressure with the desired value, gives a signal when the actual
value exceeds or drops below the desired value and initiates the shut-off sequence
3.5.12
ignition device
means (flame, electrical ignition or other means) used to ignite the main burner, or the pilot burner if
applicable
3.5.13
remote reset
manual reset after a lock-out carried out from a location different from the safety related device
NOTE The connection between the place of reset and the safety related device on the application can be by
electrical or electronic circuit. It
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