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
Ope...
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