Specification for installation and maintenance of gas-fired water-heating appliances of rated input not exceeding 70 kW net

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

30-06-2010

Publisher

British Standards Institution

This British Standard specifies requirements for the selection, installation, inspection, commissioning and maintenance of gas-fired water-heating appliances, which have a rated heat input not exceeding 70kW, based on net calorific value. It applies to water-heating appliances utilizing 1st, 2nd or 3rd family gases designed to operate in the condensing or non-condensing mode for the supply of hot water for domestic purposes in domestic dwellings or domestic dwellings in commercial premises. This standard does not apply to: water-heating appliances with a rated input of over 70kW; hot water supply systems in multiple dwellings supplied from a central source. NOTE1 Groups of water-heating appliances with individual ratings of less than 70kW but with a maximum aggregate input of 70kW may be installed to this Standard but specialist advice on the system design, installation and control needs to be sought from the appliance manufacturer. It does not cover the detailed design and installation of the whole hot water distribution system, which was specified in BS5449. NOTE2 With the publication of EN12828, EN12831 and EN14336, BS5449 has been withdrawn. These European standards, which have now been adopted as British Standards, are not aligned to UK design and installation practices; they cover commercial as well as domestic heating systems and exclude hot water. Consequently, they have been amended to include national annexes covering all the relevant material from BS5449. This standard applies to water-heating appliances which carry a CE mark and also to previously used water-heating appliances which do not carry the CE mark (see 5.3.1). NOTE3 In this standard, heat input is expressed in terms of net calorific values (CV), unless stated otherwise. The ratio of gross to net heat input is approximately 1.11:1 for natural gas, 1.09:1 for propane, and 1.08:1 for butane. NOTE4 It is essential that persons carrying out the installation of any gas appliance be competent to do so (see Clause4). NOTE5 Some parts of this standard might be appropriate for the installation of pool and spa water-heating appliances. The manufacturer’s instructions may advise which parts are not appropriate.

Committee	GSE/30
DevelopmentNote	Supersedes BS 5546(2000) & 09/30166542 DC. (06/2010)
DocumentType	Standard
Pages	68
PublisherName	British Standards Institution
Status	Current
Supersedes	09/30166542 DC : 0 BS 5546:2000

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