EN 677:1998

Foreword
1 Scope
2 Normative references
3 Definitions
    3.1 condensing boiler
    3.2 condensate
    3.3 nominal condensing output
    3.4 maximum allowable working temperature
4 Constructional requirements
    4.1 Materials in contact with condensate
    4.2 Removal of condensate
    4.3 Control of the combustion products temperature
    4.4 Chemical composition of the condensate
5 Operational requirements
    5.1 General
    5.2 Verification of the nominal condensing output
    5.3 Formation of condensate
    5.4 Temperature of combustion products
    5.5 Combustion
    5.6 Efficiencies
6 Test methods
    6.1 General
    6.2 Verification of the nominal condensing output
    6.3 Formation of condensates
    6.4 Temperature of combustion products
    6.5 Combustion
    6.6 Efficiencies
7 Marking
    7.1 Data plate
    7.2 Instructions
Annex A (normative) Correction for the determined efficiency
in the low water temperature test of condensing boilers
Annex B (informative) Special national conditions
Annex C (informative) A-deviations
Annex ZA (informative) Clauses of this European Standard
addressing essential requirements or other provisions of
EU Directives

This European standard applies to gas-fired central heating boilers, which are declared by the manufacturer to be "condensing boilers": - of types B (excluding appliances without a fan) and C, - using one or more gases corresponding to the three gas families, and - for which the nominal heat input is less than or equal to 70 kW. This European standard only covers type testing. This European standard completes or modifies the standards EN 297, prEN 483 and EN 625, hereafter called "boiler standards". It specifies supplementary requirements for condensing boilers.