1 Scope
This European Standard specifies the requirements and test methods for the construction,
the safety and the rational energy usage of an assembly made up of a boiler body complying
with EN 303‑11) and a forced draught gas burner complying with EN 676, using combustible gases, hereafter referred to as a “boiler”.
This European Standard applies to standard boilers and low-temperature boilers with a nominal heat output not exceeding 1 000 kW and
with a water temperature at normal operation not exceeding 105 °C.
This European Standard does not contain all the necessary requirements for:
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— assemblies designed as units;
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— condensing boilers ;
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— boilers intended to be installed in the open;
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— boilers permanently fitted with more than one flue outlet;
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— boilers fitted with a draught diverter;
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— boilers intended to be connected to a common flue having mechanical extraction.
This European Standard does not apply to living-space dedicated boilers (see 3.6).
If the boiler body has already been tested with a liquid fuel burner, in accordance
with EN 303‑1, EN 303‑2 and EN 304, only the tests described in Annex G need to be performed.
In the case of a range of boilers, see Annex F.
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This European Standard only covers type testing.