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Water treatment for small volume heating and cooling systems in residential dwellings (including apartments). Design, installation, handover and validation. Code of practice

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1 Scope

This British Standard gives recommendations for the design and installation of new build construction incorporating systems circulating water in sealed heating and cooling systems prior to their handover to developers.

This British standard gives recommendations for:

  • the design and preparation of pipework and plant, laying the foundations for stable water conditions;

  • the removal of construction related debris before the heat/cooling source is available;

  • validation methods and records to accompany the handover of new systems; and

  • good practices to promote the quality, longevity and efficiency essential for successful operation of the systems.

This British Standard is relevant to systems in an individual residential dwelling or within a commercial enterprise, residential development or indirectly connected to a district heating and cooling system. It applies to individual heating and cooling circuits in single or multiple residential premises with a maximum system volume of nominally less than 250 l.

This British Standard does not cover the lifetime maintenance of the systems, or remedial work or upgrades to operational systems. It also does not apply to commercial multiple residential premises served by one common circuit.

This British Standard is relevant to system designers, specifiers, installers, project managers and water treatment companies.

NOTE 1    For specialized closed circuits, such as those containing solar thermal panels and ground source heat pump loops, refer to the manufacturer’s instructions. See also BS 5918 (for solar thermal) and MIS 3005 [14] (for ground source heat pumps).

NOTE 2    For larger closed systems (>250 l) such as those found in commercial or municipal premises, or the primary/ secondary systems on residential developments, refer to BSRIA BG 29 Pre-Commission Cleaning of Pipework Systems [N1].

NOTE 3    Where cleaning is referred to in this document it is intended that it refers to the removal of manufacturing debris and residues, engineering residues, such as cutting swarf, solder and flux, and mill scale and incidental debris created during the construction of a system. For the removal of operational contaminants (e.g. limescale), see BS 7593.