UNI EN 777-3 : 2009

Foreword
1 Scope
2 Normative references
3 Terms and definitions
  3.1 System and its constituent parts
  3.2 Adjusting, control and safety devices
  3.3 System operation
  3.4 Gases
  3.5 Conditions of operation and measurement
  3.6 Country of destination
4 System classification
  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 Air-proving device in the common duct
  6.8 Prolonged performance
  6.9 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 F
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) Calculation example of the weighting
        factors for a system with several rates
Annex H (informative) NO[x] conversion calculation
Annex I (informative) National situations of countries whose
        national bodies are CEN associate members
Annex J (informative) An example of sampling plans
Annex K
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

Describes the requirements and test methods for the construction, safety, classification and marking of non-domestic gas-fired overhead radiant tube heaters incorporated into a multi-burner system (called system F and referred to in the body of the text as the "system") with each burner unit under the control of an automatic burner control system.