SIST EN 777-4:2009
Multi-burner gas-fired overhead radiant tube heater systems for non-domestic use - Part 4: System H - Safety
Multi-burner gas-fired overhead radiant tube heater systems for non-domestic use - Part 4: System H - Safety
This European Standard specifies the requirements and test methods for the construction, safety, classification and marking of non-domestic gas-fired overhead radiant tube systems incorporating two or more burner units with each burner under the control of an automatic burner control system, and operated by a single fan providing a single flue outlet, referred to in the body of the text as the "system". This standard is applicable to Type B22 systems (see 4.3) intended for use in other than domestic dwellings, in which the supply of combustion air and the evacuation of the products of combustion is achieved by mechanical means. This standard is applicable only to such systems that have fully pre-mixed gas/air burners. This standard is not applicable to: - systems designed for use in domestic dwellings; - outdoor systems; - systems in which the heat input of an individual burner unit exceeds 120 kW (based on the net calorific value of the appropriate reference test gas); - systems having a draught diverter. This European Standard is applicable to systems which are intended to be type tested. Requirements for systems which are not intended to be type tested would need to be subject to further consideration. Requirements concerning the rational use of energy have not been included in this European Standard.
Gas-Systeme-Heizstrahler - Dunkelstrahlersysteme mit mehreren Brennern mit Gebläse für gewerbliche und industrielle Anwendung - Teil 4: System H - Sicherheit
Diese Europäische Norm enthält die Anforderungen und Prüfmethoden für Bauausführung, Sicherheit, Klassifizierung und Kennzeichnung für Dunkelstrahler als Bestandteil eines Systems mit mehreren Brennern (genannt System H und im folgenden Text als System bezeichnet), wobei jede einzelne Brennereinheit von einem Gasfeuerungsautomaten überwacht wird.
Diese Europäische Norm gilt für Systeme der Arten B52 (siehe 4.3), die für gewerbliche und industrielle Anwendung vorgesehen sind und bei denen die Zufuhr der Verbrennungsluft und/oder die Abführung der Verbrennungsprodukte mit mechanischen Mitteln erfolgt. Diese Norm gilt nur für Systeme mit Brennern mit kompletter Gas- und Luftvormischung.
Diese Europäische Norm gilt nicht für:
a) Systeme, die für eine Verwendung in Wohnungen gedacht sind;
b) Systeme, die für eine Verwendung im Freien gedacht sind;
c) Systeme mit einer Wärmebelastung über 120 kW (bezogen auf den Heizwert des jeweiligen Normprüfgases);
d) Systeme mit einer Strömungssicherung;
e) Systeme, die für kontinuierliche Kondensation im Abgassystem bei normalen Betriebsbedingungen ausgelegt sind;
f) Systeme mit Abgassystem aus nichtmetallenen Werkstoffen.
Diese Norm ist anwendbar für Systeme, die für eine Typprüfung vorgesehen sind. Sie enthält auch Anforderungen an die Entwicklung von Übereinstimmung einschließlich Fertigungskontrolle, aber diese Anforderungen gelten nur für POCEDs und deren dazugehörende Windschutzeinrichtungen.
ANMERKUNG Anforderungen an Systeme, die nicht für eine Typprüfung vorgesehen sind, benötigen weitere Überlegungen.
Anforderungen an die rationelle Verwendung von Energie sind in dieser Europäischen Norm nicht enthalten.
Tubes radiants suspendus a multi-bruleurs utilisant les combustibles gazeux a usage non-domestique - Partie 4 : Systeme H - Sécurité
La présente Norme européenne définit les exigences et les méthodes d'essai relatives a la construction, la sécurité, la classification et le marquage des tubes radiants suspendus utilisant les combustibles gazeux, a usage non domestique, intégrés dans un systeme a multi-bruleurs, chaque bruleur élémentaire étant équipé d'un systeme automatique de commande et de sécurité, comprenant un seul ventilateur et une évacuation unique des produits de combustion, appelé systeme H et désigné dans le corps du texte par le "systeme".
La présente norme s'applique aux systemes de Type B52 (voir 4.3), destinés a un usage autre que dans des locaux domestiques ou l'arrivée en air comburant et l'évacuation des produits de combustion sont assurées par des moyens mécaniques. Cette norme ne s’applique qu’aux systemes avec bruleurs a prémélange total.
La présente norme ne s'applique pas :
a) aux systemes conçus pour des locaux domestiques ;
b) aux systemes utilisés en plein air ;
c) aux systemes dont le débit calorifique d'un bruleur élémentaire dépasse 120 kW (sur le pouvoir calorifique inférieur du gaz de référence approprié) ;
d) aux systemes disposant d'un coupe-tirage antirefouleur ;
e) aux systemes conçus pour une condensation continue dans le systeme d'évacuation dans des conditions de fonctionnement normales ;
f) aux systemes équipés de conduits d'évacuation des produits de combustion non métalliques.
La présente norme est applicable aux systemes qui sont destinés a subir des essais de type. Elle comprend également des exigences relatives a l’évaluation de la conformité, y compris le contrôle de fabrication en usine, ces dernieres exigences ne s’appliquant toutefois exclusivement qu’aux POCED et leurs terminaux associés.
NOTE Les exigences pour les systemes qui ne sont pas destinés a subir des essais de type doivent faire l'objet d'une attention particuliere.
(...)
Stropna cevna sevala z več plinskimi gorilniki za nestanovanjske prostore - 4. del: Sistem H - Varnost
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 777-4:2009
01-julij-2009
1DGRPHãþD
SIST EN 777-4:1999
SIST EN 777-4:1999/A1:2002
SIST EN 777-4:1999/A2:2002
SIST EN 777-4:1999/A3:2003
6WURSQDFHYQDVHYDOD]YHþSOLQVNLPLJRULOQLNL]DQHVWDQRYDQMVNHSURVWRUHGHO
6LVWHP+9DUQRVW
Multi-burner gas-fired overhead radiant tube heater systems for non-domestic use - Part
4: System H - Safety
Gas-Systeme-Heizstrahler - Dunkelstrahlersysteme mit mehreren Brennern mit Gebläse
für gewerbliche und industrielle Anwendung - Teil 4: System H - Sicherheit
Tubes radiants suspendus a multi-bruleurs utilisant les combustibles gazeux a usage
non-domestique - Partie 4 : Systeme H - Sécurité
Ta slovenski standard je istoveten z: EN 777-4:2009
ICS:
97.100.20 Plinski grelniki Gas heaters
SIST EN 777-4:2009 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 777-4:2009
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SIST EN 777-4:2009
EUROPEAN STANDARD
EN 777-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2009
ICS 91.140.40 Supersedes EN 777-4:1999
English Version
Multi-burner gas-fired overhead radiant tube heater systems for
non-domestic use - Part 4: System H - Safety
Tubes radiants suspendus à multi-brûleurs utilisant les Gasgeräte-Heizstrahler Dunkelstrahlersysteme mit
combustibles gazeux à usage non-domestique - Partie 4 : mehreren Brennern mit Gebläse für gewerbliche und
Système H - Sécurité industrielle Anwendung - Teil 4: System H - Sicherheit
This European Standard was approved by CEN on 24 January 2009.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 777-4:2009: E
worldwide for CEN national Members.
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SIST EN 777-4:2009
EN 777-4:2009 (E)
Contents Page
Foreword . 4
1 Scope. 5
2 Normative references . 5
3 Terms and definitions . 6
3.1 System and its constituent parts . 6
3.2 Combustion circuit . 8
3.3 Adjusting, control and safety devices . 9
3.4 System operation . 10
3.5 Gases. 13
3.6 Conditions of operation and measurement. 14
3.7 Country of destination . 14
4 Classification of systems . 15
4.1 Classification according to the nature of the gases used (categories) . 15
4.2 Classification according to the gases capable of being used . 15
4.3 Classification according to the mode of evacuation of the combustion products . 17
5 Constructional requirements . 17
5.1 General . 17
5.2 Requirements for adjusting, control and safety devices . 22
5.3 Ignition devices . 26
5.4 Main burners . 27
5.5 Pressure test points . 27
5.6 Injectors . 27
6 Operational requirements . 28
6.1 Soundness . 28
6.2 Heat inputs . 28
6.3 Limiting temperatures . 28
6.4 Ignition, cross-lighting and flame stability . 29
6.5 Pressure regulator . 29
6.6 Combustion . 29
6.7 Prolonged performance. 30
6.8 Measurements of oxides of Nitrogen, NO . 31
x
7 Test methods . 31
7.1 General . 31
7.2 Construction and design . 38
7.3 Safety of operation . 39
7.4 Other pollutants . 53
8 Marking and instructions . 56
8.1 Marking of the system and the packaging . 56
8.2 Instructions . 60
8.3 Presentation . 64
9 Evaluation of conformity of POCEDs and their associated terminals . 64
9.1 General . 64
9.2 Type testing . 64
9.3 Factory production control (FPC) . 65
Annex A (informative) National situations . 67
A.1 General . 67
A.2 Categories listed in the body of the standard and marketed in different countries . 67
2
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SIST EN 777-4:2009
EN 777-4:2009 (E)
A.3 Appliance supply pressures corresponding to the categories given in A.2 . 69
A.4 Special categories marketed nationally or locally . 71
A.5 Test gases corresponding to the special categories given in A.4 . 75
A.6 Gas connections in the various countries . 76
A.7 Flue connections in the various countries . 78
Annex B (informative) System H . 79
Annex C (informative) Equivalence rules . 80
C.1 Conversion to categories within a restricted Wobbe Index range . 80
C.2 Conversion to categories within an identical Wobbe Index range . 80
C.3 Conversion to categories within a wider Wobbe Index range. 81
Annex D (informative) Calculation of the mass flow rate of flue gases . 82
D.1 Flue gas mass flow rate. 82
D.2 Quantity of air in the flue gas . 82
D.3 Flue gas excess air ratio (λ) . 83
D.4 Quantity of water vapour in the flue gas . 83
D.5 Quantity of Nitrogen in the flue gas . 83
D.6 Quantity of Oxygen in the flue gas . 83
D.7 Dry quantity of flue gas . 84
D.8 Quantity of carbon dioxide in the flue gas . 84
Annex E (informative) Identification of gas types in use in various countries . 86
Annex F (normative) Special national conditions . 87
F.1 General . 87
Annex G (informative) Example of calculation of the weighting factors for a system with
several rates . 88
G.1 Appliance rates . 88
G.2 Weighting of Q = 20 . 88
pi,%
G.3 Weighting of Q = 40 . 88
pi,%
G.4 Weighting of Q = 60 . 88
pi,%
G.5 Weighting of Q = 70 . 89
pi,%
G.6 Total weighting . 89
Annex H (informative) Calculation of conversions of NO . 90
x
H.1 NO emission conversion factors. 90
x
H.2 NO Conversion — Calculation . 91
x
Annex I (informative) National situations of countries whose national bodies are CEN
associate members . 93
Annex J (informative) An example of sampling plans . 94
J.1 Sampling plans . 94
J.2 Inspection levels and procedures . 95
Annex K (informative) Flue determination . 96
K.1 General conditions of test . 96
K.2 Test conditions . 96
K.3 Test procedure . 96
K.4 Accuracy of measurement . 98
K.5 Calculation of Flue Loss. 98
Annex ZA (informative) Clauses of this European Standard addressing essential
requirements or other provisions of EU Directives . 101
Annex ZB (informative) Clauses of this European Standard addressing the provisions of
the EU Construction Products Directive . 104
ZB.1 Scope and relevant characteristics . 104
ZB.2 Procedure(s) for attestation of conformity of [construction products] . 106
ZB.3 CE marking and labelling . 109
Bibliography . 111
3
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SIST EN 777-4:2009
EN 777-4:2009 (E)
Foreword
This document (EN 777-4:2009) has been prepared by Technical Committee CEN/TC 180 “Domestic
and non-domestic gas fired air heaters and non-domestic gas fired overhead radiant heaters”, the
secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2009, and conflicting national standards
shall be withdrawn at the latest by September 2009.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such
patent rights.
This document supersedes EN 777-4:1999.
This revision modifies EN 777-4:1999. It has been prepared to incorporate requirements for
combustion products evacuation ducts, POCEDs, supplied as an integral part of the system to
support the EU Directive 89/106/EEC on construction products under mandate M/105. To this end the
systems within the scope of this standard are now defined as Type B rather than Type B .
52 22
Furthermore, the opportunity presented by this revision has been taken to update the standard in
respect to EN 437:2003.
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 EC Directive(s).
For relationship with EC Directive(s), see informative Annexes ZA and ZB, which are integral parts of
this document.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
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 and the United Kingdom.
4
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SIST EN 777-4:2009
EN 777-4:2009 (E)
1 Scope
This European Standard specifies the requirements and test methods for the construction, safety,
classification and marking of non-domestic gas-fired overhead radiant tube systems incorporating two or
more burner units with each burner under the control of an automatic burner control system, and
operated by a single fan providing a single flue outlet, called system H and referred to in the body of the
text as the “system”.
This standard is applicable to Type B systems (see 4.3) intended for use in other than domestic
52
dwellings, in which the supply of combustion air and the evacuation of the products of combustion is
achieved by mechanical means. This standard is applicable only to such systems that have fully pre-
mixed gas/air burners.
This standard is not applicable to:
a) systems designed for use in domestic dwellings;
b) outdoor systems;
c) systems of heat input in excess of 120 kW (based on the net calorific value of the appropriate
reference test gas);
d) systems having a draught diverter;
e) systems that are designed for continuous condensation within the flue system under normal
operating conditions;
f) systems having combustion products evacuation ducts that are non-metallic.
This standard is applicable to systems which are intended to be type tested. It also includes requirements
concerning the evaluation of conformity, including factory production control, but these requirements only
apply to POCEDs and their associated terminals.
NOTE Requirements for systems which are not intended to be type tested would need to be subject to
further consideration.
Requirements concerning the rational use of energy have not been included in this European Standard.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the editions cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 88-1:2007, Pressure regulators and associated safety devices for gas appliances - Part 1:
Pressure regulators for inlet pressures up to and including 500 mbar
EN 126:2004, Multifunctional controls for gas burning appliances
EN 161:2007, Automatic shut-off valves for gas burners and gas appliances
EN 257, Mechanical thermostats for gas-burning appliances
EN 298:2003, Automatic gas burner control systems gas burners and gas burning appliances with or
without fans
5
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SIST EN 777-4:2009
EN 777-4:2009 (E)
EN 437:2003, Test gases - Test pressures - Appliance categories
EN 10226-1:2004, Pipe threads where pressure tight joints are made on the threads – Part 1: Taper
external threads and parallel internal threads - Dimensions, tolerances and designation
EN 10226-2:2005, Pipe threads where pressure tight joints are made on the threads – Part 2: Taper
external threads and taper internal threads - Dimensions, tolerances and designation
EN 60335-1:2002, Household and similar electrical appliances – Safety - Part 1: General
requirements
EN 60335-2-102:2006, Household and similar electrical appliances – Safety - Part 2-102: Particular
requirements for gas, oil and solid-fuel burning having electrical connections
EN 60529:1992, Degrees of protection provided by enclosures (IP code)
EN 60584-1:1995, Thermocouples — Part 1: Reference tables
EN 60584-2:1993, Thermocouples — Part 2: Tolerances
EN ISO 228-1:2003, Pipe threads where pressure-tight joints are not made on the threads - Part 1:
Dimensions, tolerances and designation (ISO 228-1:2000)
EN ISO 3166-1:2006, Codes for the representation of names of countries and their subdivisions –
Part 1: Country codes (ISO 3166-1:2006)
EN ISO 6976:2005, Natural gas - Calculation of calorific values, density, relative density and Wobbe
index from composition (ISO 6976:1995 including Corrigendum 1:1997, Corrigendum 2:1997 and
Corrigendum 3:1999)
ISO 7005-1:1992, Metallic flanges - Part 1: Steel flanges
ISO 7005-2:1988, Metallic flanges - Part 2: Cast iron flanges
ISO 7005-3:1988, Metallic flanges - Part 3: Copper flanges and composite flanges
CR 1404:1994, Determination of emissions from appliances burning gaseous fuels during type testing
3 Terms and definitions
For the purposes of this standard the following terms and definitions apply.
3.1 System and its constituent parts
3.1.1
overhead radiant tube heater
gas fired appliance intended for installation above head level which is designed to heat the space
beneath by radiation by means of a tube or tubes, heated by the internal passage of combustion products
3.1.2
multi-burner systems
those radiant tube heater systems which employ two or more burner units with each unit incorporating
independent flame monitoring.
NOTE The units may be located in one or more sections of tubing. One or more fans may be used to assist in the
evacuation of products of combustion or the supply of combustion air
6
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SIST EN 777-4:2009
EN 777-4:2009 (E)
System H: system in which individual units without fans are connected to a common duct with a fan. One
or more burner units are situated in each branch tube (see Annex B).
3.1.3
branch tube
for the purposes of this part, a tube in which one or more burner units is/are situated and which only
contains the products of combustion generated by this, or these, burners
3.1.4
common duct
duct which receives products of combustion from two or more branch tubes for the purposes of
evacuation to the outside
3.1.5
individual burner unit
unit comprising a main burner and, if appropriate, an ignition burner. In addition, such components which
are necessary to ignite the burner(s), monitor the flame and control the gas supply to the burner(s) are
included in the unit
3.1.6
inlet connection
part of the system intended to be connected to the gas supply
3.1.7
mechanical joint
means of ensuring the soundness of an assembly of several parts e.g. metal to metal joints, conical
joints, toroidal sealing rings (“O” rings), flat joints without the use of liquids (e.g. pastes and tapes)
3.1.8
gas circuit
part of the burner unit that conveys or contains the gas between the burner unit gas inlet connection and
the burner(s)
3.1.9
restrictor
device with an orifice, which is placed in the gas circuit so as to create a pressure drop and thus reduce
the gas pressure at the burner to a predetermined value for a given supply pressure and rate
3.1.10
gas rate adjuster
component allowing an authorised person to set the gas rate of the burner to a predetermined value
according to the supply conditions
NOTE 1 Adjustment can be progressive (screw adjuster) or in discrete steps (by changing restrictors).
NOTE 2 The adjusting screw of an adjustable regulator is regarded as a gas rate adjuster.
NOTE 3 The action of adjusting this device is called “adjusting the gas rate”.
NOTE 4 A factory sealed gas rate adjuster is considered to be non-existent.
3.1.11
setting an adjuster
immobilizing a gas rate adjuster by such means as e.g. a screw, after the gas rate has been adjusted by
the manufacturer or installer
7
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SIST EN 777-4:2009
EN 777-4:2009 (E)
3.1.12
sealing an adjuster
term applied to any arrangement in respect of the adjuster such that any attempt to change the
adjustment breaks the sealing device or sealing material and makes this interference apparent
NOTE 1 A factory sealed adjuster is considered to be non-existent.
NOTE 2 A regulator is considered to be non-existent if it has been factory sealed, i.e. by the system
manufacturer in a position such that it is not operational in the range of the normal supply pressure corresponding
to the system category.
3.1.13
putting an adjuster or a control out of service
adjuster or a control (e.g. of temperature or pressure) is said to be “put out of service” if it is put out of
action and sealed in this position; the burner unit then functions as if this device has been removed
3.1.14
injector
component that admits the gas into a burner
3.1.15
main burner
burner that is intended to ensure the thermal function of the system and is generally called the burner
3.1.16
ignition device
means (e.g. flame, electrical ignition device or other device) used to ignite the gas at the ignition burner or
at the main burner
NOTE This device can operate intermittently or permanently.
3.1.17
ignition burner
burner whose flame is intended to ignite another burner
3.1.18
fully pre-mixed gas/air burner
pre-aerated burner system in which gas is mixed in a pre-determined and adjustable ratio with all of the
air necessary for combustion
3.1.19
aeration orifice
device in a burner unit enabling a volume of combustion air to enter the burner or point of combustion
consistent with the gas flow through the gas orifice and variable with downstream negative pressure
3.1.20
primary aeration adjuster
device enabling the primary air to be set at the desired value according to the supply conditions
3.1.21
system aeration adjuster
one or more devices enabling the air flow condition within a branch tube or common duct to be set to
design values
3.2 Combustion circuit
3.2.1
combustion chamber
enclosure inside which combustion of the air-gas mixture takes place
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SIST EN 777-4:2009
EN 777-4:2009 (E)
3.2.2
flue outlet
part of a Type B system that connects with a flue to evacuate the products of combustion
3.2.3
draught diverter
device placed in the combustion products circuit to reduce the influence of flue-pull and that of down-
draught on the burner performance and combustion
3.2.4
POCED
combustion products evacuation duct that is intended to be used only with a specific appliance/system;
this duct being either supplied with the appliance/system or specified in the manufacturer's instructions
3.3 Adjusting, control and safety devices
3.3.1
automatic burner control system
system comprising at least a programming unit and all the elements of a flame detector device
NOTE The various functions of an automatic burner control system may be in one or more housings.
3.3.2
programming unit
device which reacts to
...
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