BS EN 777-3:2009 Multi-burner gas-fired overhead radiant tube heater systems for non-domestic use. System F. Safety
BS EN 777-3 specifies 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.
BS EN 777-3 applies to systems intended for use in other than domestic dwellings, in which the supply of combustion air and/or the evacuation of the products of combustion is achieved by mechanical means.
BS EN 777-3 does not apply to:
- Systems designed for use in domestic dwelling
- Outdoor systems
- Systems of heat input in excess of 120 kW (based on the net calorific value of the appropriate reference test gas)
- Systems having a draught diverter between the exhaust fan and the flue duct
- Systems having fully pre-mixed gas and air burners in which either the gas and all the combustion air are brought together just before the level of the combustion zone; or the pre-mixing of the gas and all combustion air is carried out in a part of the burner upstream of the combustion zone.
- Systems that are designed for continuous condensation within the flue system under normal operating conditions
- Systems having combustion products evacuation ducts that are non-metallic.
Contents of BS EN 777-3:
- Foreword
- Scope
- Normative references
- Terms and definitions
- System classification
- Constructional requirements
- Operational requirements
- Test methods
- Marking and instructions
- Evaluation of conformity of POCEDs and their associated terminals
- National situations
- System F
- Equivalence rules
- Calculation of the mass flow rate of flue gases
- Identification of gas types in use in various countries
- Special national conditions
- Calculation example of the weighting factors for a system with several rates
- NOx conversion calculation
- An example of sampling plans
- Clauses of this European Standard addressing essential requirements or other provisions of
- EU Directives
- Clauses of this European Standard addressing the provisions of the EU Construction Products Directive
- Scope and relevant characteristics
- Procedure(s) for attestation of conformity of [construction products]
- CE marking and labelling
- Bibliography