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BS EN 777-4:2009

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Multi-burner gas-fired overhead radiant tube heater systems for non-domestic use System H. Safety
Available format(s)

Hardcopy , PDF

Superseded date

11-07-2019

Language(s)

English

Published date

04-30-2009

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
      A.1 General
      A.2 Categories listed in the body of the
          standard and marketed in different
          countries
      A.3 Appliance supply pressures corresponding
          to the categories given in A.2
      A.4 Special categories marketed nationally or
          locally
      A.5 Test gases corresponding to the special
          categories given in A.4
      A.6 Gas connections in the various countries
      A.7 Flue connections in the various countries
Annex B (informative) - System H
Annex C (informative) - Equivalence rules
      C.1 Conversion to categories within a restricted
          Wobbe Index range
      C.2 Conversion to categories within an identical
          Wobbe Index range
      C.3 Conversion to categories within a wider
          Wobbe Index range
Annex D (informative) - Calculation of the mass flow rate
        of flue gases
      D.1 Flue gas mass flow rate
      D.2 Quantity of air in the flue gas
      D.3 Flue gas excess air ratio (lambda)
      D.4 Quantity of water vapour in the flue gas
      D.5 Quantity of Nitrogen in the flue gas
      D.6 Quantity of Oxygen in the flue gas
      D.7 Dry quantity of flue gas
      D.8 Quantity of carbon dioxide in the flue gas
Annex E (informative) - Identification of gas types in use
        in various countries
Annex F (normative) - Special national conditions
      F.1 General
Annex G (informative) - Example of calculation of the
        weighting factors for a system with several rates
      G.1 Appliance rates
      G.2 Weighting of Q[pi],% = 20
      G.3 Weighting of Q[pi],% = 40
      G.4 Weighting of Q[pi],% = 60
      G.5 Weighting of Q[pi],% = 70
      G.6 Total weighting
Annex H (informative) - Calculation of conversions
        of NO[X]
      H.1 NO[X] emission conversion factors
      H.2 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
      J.1 Sampling plans
      J.2 Inspection levels and procedures
Annex K (informative) - Flue determination
      K.1 General conditions of test
      K.2 Test conditions
      K.3 Test procedure
      K.4 Accuracy of measurement
      K.5 Calculation of Flue Loss
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
      ZB.1 Scope and relevant characteristics
      ZB.2 Procedure(s) for attestation of conformity of
           [construction products]
      ZB.3 CE marking and labelling
Bibliography

Describes the requirements and test methods for the construction, safety, classification and marking of non-domestic gas-fired overhead radiant tube systems incorporating two or more burner units with each burner under the control of an automatic burner control system, and operated by a single fan providing a single flue outlet, called system H and referred to in the body of the text as the "system".

This European Standard specifies the requirements and test methods for the construction, safety, classification and marking of non-domestic gas-fired overhead radiant tube systems incorporating two or more burner units with each burner under the control of an automatic burner control system, and operated by a single fan providing a single flue outlet, called system H and referred to in the body of the text as the “system??. This standard is applicable to Type B52 systems (see 4.3) intended for use in other than domestic dwellings, in which the supply of combustion air and the evacuation of the products of combustion is achieved by mechanical means. This standard is applicable only to such systems that have fully pre-mixed gas/air burners. This standard is not applicable to: a) systems designed for use in domestic dwellings; b) outdoor systems; c) systems of heat input in excess of 120 kW (based on the net calorific value of the appropriate reference test gas); d) systems having a draught diverter; e) systems that are designed for continuous condensation within the flue system under normal operating conditions; f) systems having combustion products evacuation ducts that are non-metallic. This standard is applicable 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. NOTE Requirements for systems which are not intended to be type tested would need to be subject to further consideration. Requirements concerning the rational use of energy have not been included in this European Standard.

Committee
GSE/20
DevelopmentNote
Supersedes 92/78219 DC (10/2001)
DocumentType
Standard
Pages
114
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

Standards Relationship
NEN EN 777-4 : 2009 Identical
SN EN 777-4 : 2009 Identical
NBN EN 777-4 : 2009 Identical
NS EN 777-4 : 2009 Identical
I.S. EN 777-4:2009 Identical
NF EN 777-4 : 2009 Identical
UNE-EN 777-4:2009 Identical
UNI EN 777-4 : 2009 Identical
DIN EN 777-4:2009-09 Identical
EN 777-4:2009 Identical

BS 6896:2011 Specification for installation and maintenance of gas-fired overhead radiant heaters for industrial and commercial heating (2nd and 3rd family gases)
BS 6896:2005 Specification for installation of gas-fired overhead radiant heaters for industrial and commercial heating (2nd and 3rd family gases)
10/30218901 DC : 0 BS 6896 - SPECIFICATION FOR INSTALLATION OF GAS-FIRED OVERHEAD RADIANT HEATERS FOR INDUSTRIAL AND COMMERCIAL HEATING (2ND AND 3RD FAMILY GASES)

93/68/EEC : 1993 AMD 2 1998 COUNCIL DIRECTIVE 93/68/EEC OF 22.7.93 AMENDING DIRECTIVES 87/404/EEC, 88/378/EEC, 89/106/EEC, 89/336/EEC, 89/392/EEC, 89/686/EEC, 90/384/EEC, 90/385/EEC, 90/396/EEC, 91/263/EEC, 92/42/EEC AND 73/23/EEC
EN 1859:2009+A1:2013 Chimneys - Metal chimneys - Test methods
ISO 7005-2:1988 Metallic flanges — Part 2: Cast iron flanges
ISO 6976:2016 Natural gas — Calculation of calorific values, density, relative density and Wobbe indices from composition
ISO 274:1975 Copper tubes of circular section — Dimensions
EN 10226-2:2005 Pipe threads where pressure tight joints are made on the threads - Part 2: Taper external threads and taper internal threads - Dimensions, tolerances and designation
EN 60584-2:1993 Thermocouples - Part 2: Tolerances
EN 60730-2-9:2010 Automatic electrical controls for household and similar use - Part 2-9: Particular requirements for temperature sensing controls
89/106/EEC : 1988 COUNCIL DIRECTIVE OF 21 DECEMBER 1988 ON THE APPROXIMATION OF LAWS, REGULATIONS AND ADMINISTRATIVE PROVISIONS OF THE MEMBER STATES RELATING TO CONSTRUCTION PRODUCTS
ISO 7005-3:1988 Metallic flanges Part 3: Copper alloy and composite flanges
EN 416-1:2009 Single burner gas-fired overhead radiant tube heaters for non-domestic use - Part 1: Safety
EN ISO 3166-1:2014 Codes for the representation of names of countries and their subdivisions - Part 1: Country codes (ISO 3166-1:2013)
EN 161:2011+A3:2013 Automatic shut-off valves for gas burners and gas appliances
EN ISO 228-1:2003 Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation (ISO 228-1:2000)
EN 437:2003+A1:2009 Test gases - Test pressures - Appliance categories
EN 125:2010+A1:2015 Flame supervision devices for gas burning appliances - Thermoelectric flame supervision devices
EN 126:2012 Multifunctional controls for gas burning appliances
EN 60584-1:2013 Thermocouples - Part 1: EMF specifications and tolerances
CEN/TR 1749:2014 European scheme for the classification of gas appliances according to the method of evacuation of the combustion products (types)
CR 1404:1994 Determination of emissions from appliances burning gaseous fuels during type-testing
EN 60335-2-102:2016 Household and similar electrical appliances - Safety - Part 2-102: Particular requirements for gas, oil and solid-fuel burning appliances having electrical connections
EN 60730-2-1 : 97 AMD 11 2005 AUTOMATIC ELECTRICAL CONTROLS FOR HOUSEHOLD AND SIMILAR USE - PART 2-1: PARTICULAR REQUIREMENTS FOR ELECTRICAL CONTROLS FOR ELECTRICAL HOUSEHOLD APPLIANCES
ISO 3166-1:2013 Codes for the representation of names of countries and their subdivisions Part 1: Country codes
EN 60335-1:2012/A13:2017 HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES - SAFETY - PART 1: GENERAL REQUIREMENTS (IEC 60335-1:2010, MODIFIED)
EN 298:2012 Automatic burner control systems for burners and appliances burning gaseous or liquid fuels
ISO 7005-1:2011 Pipe flanges — Part 1: Steel flanges for industrial and general service piping systems
EN 60529:1991/AC:2016-12 DEGREES OF PROTECTION PROVIDED BY ENCLOSURES (IP CODE) (IEC 60529 EDITION 2.2 CORRIGENDUM 2:2015)
EN ISO 6976:2016 Natural gas - Calculation of calorific values, density, relative density and Wobbe indices from composition (ISO 6976:2016)
EN 10226-1:2004 Pipe threads where pressure tight joints are made on the threads - Part 1: Taper external threads and parallel internal threads - Dimensions, tolerances and designation
EN 88-1:2011+A1:2016 Pressure regulators and associated safety devices for gas appliances - Part 1: Pressure regulators for inlet pressures up to and including 50 kPa
ISO 228-1:2000 Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designation
EN 60730-1:2016 Automatic electrical controls - Part 1: General requirements
1990/396/EEC : 1990 COUNCIL DIRECTIVE OF 29 JUNE 1990 ON THE APPROXIMATION OF THE LAWS OF THE MEMBER STATES RELATING TO APPLIANCES BURNING GASEOUS FUELS
EN 257:2010 Mechanical thermostats for gas-burning appliances

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