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BS EN 656:2000

Current
Current

The latest, up-to-date edition.

Gas-fired central heating boilers. Type B boilers of nominal heat input exceeding 70 kW, but not exceeding 300 kW
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

09-29-2006

This standard specifies the requirements and test methods concerning, in particular the construction, safety, fitness for purpose, and rational use of energy, as well as the classification and marking of gas-fired central heating boilers that are fitted with atmospheric burners, fan assisted atmospheric burners or fully premixed burners, and are hereafter referred to as “boilers”.

This standard applies to boilers of type B, as listed in 4.2:

  • of the low-temperature type;

  • that use one or more combustible gases of the three gas families at the pressures stated in Tables 14 and 15;

  • that have a nominal heat input (net CV basis) exceeding 70 kW, but not exceeding 300 kW, including modular boilers;

  • where the temperature of the heat transfer fluid does not exceed 105 °C during normal operation;

  • where the maximum operating pressure in the water circuit does not exceed 6 bar.

  • of the standard type possibly producing condensation in certain circumstances;

The standard applies to boilers designed for sealed water systems or for open water systems.

The standard does not contain all the requirements necessary for boilers:

  • intended to be installed in the open or in living rooms;

  • permanently fitted with more than one flue outlet;

  • where the combustion circuit is sealed with respect to the room where the boiler is installed;

  • of the condensing type;

Text deleted

  • intended to be connected to a common flue having mechanical extraction;

  • fitted with a forced draught burner in accordance with EN 676;

  • producing hot water for domestic purposes.

This standard only covers type testing.

Committee
GSE/29
DevelopmentNote
Partially supersedes BS 5978-1(1989), BS 5978-2(1989) and BS 5978-3(1989). Supersedes 92/72662 DC. (08/2005) Supersedes 05/30142216 DC (10/2006)
DocumentType
Standard
Pages
120
PublisherName
British Standards Institution
Status
Current
Supersedes

11/30229801 DC : 0 BS 6644 - SPECIFICATION FOR THE INSTALLATION OF GAS-FIRED HOT WATER BOILERS OF RATED INPUTS BETWEEN 70 KW (NET) AND 1.8 MW (NET) (2ND AND 3RD FAMILY GASES)
BS 6644(2005) : 2005 SPECIFICATION FOR INSTALLATION OF GAS-FIRED HOT WATER BOILERS OF RATED INPUTS BETWEEN 70 KW (NET) AND 1.8 MW (NET) (2ND AND 3RD FAMILY GASES)
BS 6644:2011 Specification for the installation and maintenance of gas-fired hot water boilers of rated inputs between 70 kW (net) and 1.8 MW (net) (2nd and 3rd family gases)
03/310868 DC : DRAFT JUNE 2003 BS 6644 - SPECIFICATION FOR INSTALLATION OF GAS-FIRED HOT WATER BOILERS OF RATED INPUTS BETWEEN 70KW (NET) AND 2MW (GROSS) (2ND AND 3RD FAMILY GASES)

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