UNI EN 777-4 : 2009
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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MULTI-BURNER GAS-FIRED OVERHEAD RADIANT TUBE HEATER SYSTEMS FOR NON-DOMESTIC USE - PART 4: SYSTEM H - SAFETY
24-08-2022
12-03-2009
Foreword
1 Scope
2 Normative references
3 Terms and definitions
3.1 System and its constituent parts
3.2 Combustion circuit
3.3 Adjusting, control and safety devices
3.4 System operation
3.5 Gases
3.6 Conditions of operation and measurement
3.7 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 regulator
6.6 Combustion
6.7 Prolonged performance
6.8 Measurements of oxides of Nitrogen, NO[x]
7 Test methods
7.1 General
7.2 Construction and design
7.3 Safety of operation
7.4 Other pollutants
8 Marking and instructions
8.1 Marking of the system and the packaging
8.2 Instructions
8.3 Presentation
9 Evaluation of conformity of POCEDs and their associated
terminals
9.1 General
9.2 Type testing
9.3 Factory production control (FPC)
Annex A (informative) National situations
Annex B (informative) System H
Annex C (informative) Equivalence rules
Annex D (informative) Calculation of the mass flow rate
of flue gases
Annex E (informative) Identification of gas types in use
in 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) Calculation of conversions of NO[x]
Annex I (informative) National situations of countries whose
national bodies are CEN associate members
Annex J (informative) An example of sampling plans
Annex K (informative) Flue determination
Annex ZA (informative) Clauses of this European Standard
addressing essential requirements or other provisions
of EU Directives
Annex ZB (informative) Clauses of this European Standard
addressing the provisions of the EU Construction
Products Directive
Bibliography
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