BS EN 777-2:2009 Multi-burner gas-fired overhead radiant tube heater systems for non-domestic use. System E. Safety
BS EN 777-2 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 with each burner unit under the control of an automatic burner control system.
BS EN 777-2 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 777-2 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.
BS EN 777-2 applies 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.
Contents of BS EN 777-2:
- 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 E
- Equivalence rules
- Calculation of flue gas mass flow rate
- 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
- Flue determination
- 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
- Bibliography
