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BSI 21/30408387 DC:2021 Edition

BSI 21/30408387 DC:2021 Edition

$13.70

BS 8693 Water treatment for small volume closed systems in residential dwellings (including apartments) – Design, installation, handover and validation – Code of practice

Published By Publication Date Number of Pages
BSI 2021 47
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PDF Catalog

PDF Pages PDF Title
1 30408387_Form 36.PDF
3 30408387_Text.pdf
7 1 Scope
2 Normative references
8 3 Terms, definitions and symbols
3.1 Terms and definitions
3.1.1 2-port control valve
3.1.2 batch work flushing
3.1.3 cooling interface units (CIU)
3.1.4 cooling system
3.1.5 dead-leg
3.1.6 heating system
3.1.7 heat interface units (HIU)
3.1.8 flushing rig
9 3.1.9 foul water drainage
3.1.10 lock shield valve (LSV)
3.1.11 open vented closed system
3.1.12 practical completion
3.1.13 premises
3.1.14 pressure independent control valve (PICV)
3.1.15 sealed system
3.1.16 terminal unit
3.1.17 thermostatically controlled radiator valve (TRV)
3.2 Symbols
11 4 System design and installation
4.1 General
4.2 Accessibility and maintainability
4.2.1 Location and labelling
4.2.2 Isolation of plant and equipment
4.2.3 Air vents and drain points
4.2.4 Flushing connections
12 4.3 Protection for sensitive plant and terminal units
4.3.1 Sensitive plant and terminal units
4.3.2 Bypasses for terminal units and plant items
14 4.3.3 Flushing facilities for chilled beams, radiant panels and FCUs
4.3.4 Flushing facilities for underfloor heating systems
15 4.3.5 Flushing facilities for radiators
4.3.5.1 General
4.3.5.2 Radiators
18 The use of additional full bore isolation valves local to the TRV and LSV (see Figure 6) to enable the temporary removal of the TRV and LSV before linking the flow and return, or the installation of an appropriately positioned flushing bypass below t…
4.3.7 Flushing facilities for radiant panels and chilled beams/panels
20 4.4 Heating and cooling sources flushing facilities
4.4.1 Boilers and heat pumps
4.4.2 HIU and CIU
21 4.5 Dynamic flushing flow measurement
22 4.6 Use of strainers
4.7 Dosing facilities
4.8 Drainage facilities
5 Materials for installation
23 6 Filling/flushing water supply
24 7 Initial filling of systems and expansion vessels
7.1 Filling
25 7.2 Pressure testing
8 Make-up water to systems that are in operation
8.1 General
8.2 System fill water supply
26 8.3 Sealed systems
27 8.4 Open vented systems
9 Microbiological control prior to cleaning
10 Cleaning methodologies
10.1 Introduction
10.2 Temporary pumps
10.2.1 Temporary pump arrangement
28 10.2.2 Pre-works planning
10.3 Flushing and cleaning
10.3.1 General
29 10.3.2 Cleaning using mains pressure flushing
30 10.3.3 Cleaning using powerflushing
31 10.3.4 Cleaning using gravity flushing
10.3.5 Filtration cleaning
33 10.3.6 Chemical cleaning of pipework
10.4 Flushing of terminal units
10.5 Flushing of boilers, HIU and CIU and bringing them on-line.
34 11 Final dosing of circuits after cleaning
11.1 General
11.2 Biocides
35 11.3 Inhibitor
11.4 Water quality specifications
12 Validation of water condition
12.1 General
12.2 Validation criteria
36 12.3 Sampling and analysis plan
38 12.4 Water quality parameters
39 13 Mothballing/maintaining water quality until handover
14 Handover documents
41 Annex A (informative) Guide to materials used for installation
A.1 Introduction
A.2 Copper
42 A.3 Plastic
43 A.4 Mild steel
A.5 Thin walled carbon steel
44 A.6 Stainless steel
A.7 Aluminium
A.8 Brass

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BSI 21/30408387 DC
$13.70