EN 525:2009

Foreword
1 Scope
2 Normative references
3 Terms and definitions
  3.1 Appliance and its constituent parts
  3.2 Adjustment, control and safety devices
  3.3 Appliance operation
  3.4 Gases
  3.5 Conditions of operation and measurement
  3.6 Marking of the appliance and packaging
4 Classification
  4.1 Classification of gases
  4.2 Classification of appliance
5 Construction and design requirements
  5.1 General
  5.2 Adjusting, control and safety devices
  5.3 Ignition devices
  5.4 Combustion and dilution air, pre-purge and
       post-purge
  5.5 Flame supervision system
  5.6 Start-gas flame establishment
  5.7 Main flame establishment
  5.8 Main burner
  5.9 Facility for remote control
  5.10 Thermostats and control of air temperature
  5.11 Gas pressure points
  5.12 Facilities for commissioning and testing
  5.13 Additional requirements for appliances designed
       for permanent outdoor installation
6 Operational requirements
  6.1 Soundness of the gas circuit
  6.2 Heat inputs
  6.3 Limiting temperatures
  6.4 Ignition, cross-lighting, flame stability
  6.5 Combustion
  6.6 Overheat cut-off device
  6.7 Air proving device(s)
  6.8 Weather resistance
7 Test methods
  7.1 General
  7.2 Automatic burner control systems (manually
       operated devices)
  7.3 Safety of operation
8 Marking and instructions
  8.1 General
  8.2 Description
  8.3 Data plate
  8.4 Other marking
  8.5 Marking on the packaging
  8.6 Profile plate
  8.7 Instructions
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
Annex B (normative) - Identification of symbols used
        for marking
      B.1 Designation of country of destination
      B.2 Category
      B.3 Supplementary transitional information
Annex C (informative) - Guidance for limitations of
        application of direct-fired air heaters in
        buildings
      C.1 Introduction
      C.2 General principles
      C.3 Safe operating emission levels
      C.4 Assessment of concentrations
      C.5 Case studies
Annex D (normative) - Special national conditions
      D.1 General
      D.2 Belgium
      D.3 Italy
Annex E (informative) - National solutions for countries
        whose national bodies are Affiliate Members
        of CEN
      E.1 Categories listed in the body of the standard
          and marketed in different countries
      E.2 Appliance supply pressures corresponding to
          the categories given in E.1
      E.3 Special categories marketed nationally or locally
      E.4 Gases and test pressures corresponding to the
          special categories given in E.3
Annex ZA (informative) - Relationship between this European
         Standard and the Essential Requirements of EU
         Directive 90/396/EEC (Gas Appliance Directive)
Bibliography

This European Standard specifies the requirements and test methods for the safety of non-domestic directgas-fired forced convection air heaters having fully automatic control systems, hereafter referred to as"appliances".This European Standard applies to appliances of Type A2 and Type A3 with heat input based on the netcalorific value of 300 kW or less fitted with integral burners intended for use other than in residential dwellings.It also applies to appliances designed for outdoor installation. For indoor appliances provision of the heated airmay be by means of ducting or may be directly into the heated space.This standard does not apply to:a) appliances intended for use in residential dwellings;b) portable or transportable forced convection appliances;c) appliances fitted with gas boosters;d) appliances fitted with air/gas ratio controls;e) appliances which incorporate a main burner having more than one section under a common burnercontrol, of which one or more sections may be extinguished whilst another section remains in operation.This European Standard is applicable to appliances which are intended to be type tested.NOTE Requirements for appliances which are not type tested would need to be subject to further consideration.