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NBN EN 777-4 : 2009
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The latest, up-to-date edition.
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MULTI-BURNER GAS-FIRED OVERHEAD RADIANT TUBE HEATER SYSTEMS FOR NON-DOMESTIC USE - PART 4: SYSTEM H - SAFETY
12-01-2013
Foreword
1 Scope
2 Normative References
3 Definitions
3.1 System and its constituent parts
3.2 Adjusting, control and safety devices
3.3 Operation of the system
3.4 Gases
3.5 Conditions of operation and measurement
3.6 Country of destination
4 Classification of Systems
4.1 Classification according to the nature of the gases
used (categories)
4.2 Classification according to the gases capable of
being used
4.3 Classification according to the mode of evacuation of
the combustion products
5 Constructional Requirements
5.1 General
5.2 Requirements for adjusting, control and safety devices
5.3 Ignition devices
5.4 Main burners
5.5 Pressure test points
5.6 Injectors
6 Operational Requirements
6.1 Soundness
6.2 Heat inputs
6.3 Limiting temperatures
6.4 Ignition, cross-lighting and flame stability
6.5 Pressure governor
6.6 Combustion
6.7 Prolonged performance
6.8 Measurement of oxides of Nitrogen, NO[x]
7 Test methods
7.1 General
7.2 Construction and design
7.3 Safety of operation
8 Marking and instructions
8.1 Marking of the system and the packaging
8.2 Instructions
8.3 Presentation
Annex A (informative) System H
Annex B (informative) National situations
Annex C (informative) Equivalence rules
Annex D (informative) Calculation of the mass flow rate
of flue gases
Annex E (informative) Identification of the type of gas
in use in the various countries
Annex F (normative) Special national conditions
Annex G (informative) Example of calculation of the
weighting factors for a system with several
rates
Annex H (informative) Calculations of conversions of NO[x]
Annex I (informative) National situations of countries
whose national bodies are CEN associate members
Annex ZA (informative) Clauses of this European Standard
addressing essential requirements or other
provisions of EU Directives
Bibliography
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