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BSI 23/30480279 DC 2023

BSI 23/30480279 DC 2023

$13.70

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

Published By Publication Date Number of Pages
BSI 2023 49
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PDF Catalog

PDF Pages PDF Title
1 30480279_Form 36
3 30480279_text
7 Introduction
1 Scope
8 2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.1.1 2-port control valve
3.1.2 batch work
3.1.3 boiler
3.1.4 chemical cleaning
3.1.5 chilled beam
9 3.1.6 cleaning
3.1.7 cooling interface unit (CIU)
3.1.8 cooling system
3.1.9 dead-leg
3.1.10 dynamic flushing
3.1.11 flash corrosion
3.1.12 flow measuring device
3.1.13 heat interface unit (HIU)
3.1.14 heating system
3.1.15 filtration cleaning
3.1.16 flushing rig
3.1.17 foul water drainage
3.1.18 lock shield valve (LSV)
10 3.1.19 open vented recirculating system
3.1.20 practical completion
3.1.21 pre-commission water treatment
3.1.22 premises
3.1.23 pressure independent control valve (PICV)
3.1.24 radiant panel
3.1.25 sealed system
3.1.26 terminal unit
3.1.27 thermostatic radiator valve (TRV)
3.1.28 total viable count (TVC)
3.1.29 trench heating
3.1.30 water treatment
11 3.2 Symbols
4 System design and installation
4.1 Accessibility and maintainability
4.1.1 Location and labelling
4.1.2 Isolation of plant and equipment
4.1.3 Air vents and drain points
12 4.1.4 Flushing connections
4.2 Protection for sensitive plant and terminal units
4.2.1 Sensitive plant and terminal units
4.2.2 Bypasses for terminal units
15 4.2.3 Flushing facilities for chilled beams, radiant panels and FCUs
4.2.4 Flushing facilities for underfloor heating systems
16 4.2.5 Flushing facilities for radiators
4.2.5.1 General
4.2.5.2 Radiators
18 4.2.6 Flushing facilities for trench heating or cooling
19 4.2.7 Flushing facilities for radiant panels and chilled beams/panels
21 4.3 Heating and cooling sources flushing facilities
4.3.1 Boilers and heat pumps
4.3.2 HIU and CIU
22 4.4 Dynamic flushing flow measurement
4.5 Use of strainers
23 4.6 Dosing facilities
4.7 Drainage facilities
5 Materials of construction
24 6 Filling/flushing water supply
25 7 Initial filling of systems and expansion vessels
7.1 Filling
26 7.2 Pressure testing
8 Make-up water to systems that are in operation
8.1 General
8.2 System fill water supply
27 8.3 Sealed systems
28 8.4 Open vented recirculating systems
9 Microbiological control prior to cleaning
10 Pre-commission cleaning methodologies
10.1 Introduction
10.2 Temporary pumps
10.2.1 Temporary pump arrangement
29 10.2.2 Pre-works planning
10.3 Flushing and cleaning
10.3.1 General
30 10.4 Water quality specifications
31 11 Validation of water condition
11.1 General
11.2 Validation criteria
11.3 Sampling and analysis plan
33 11.4 Water quality parameters
34 12 Mothballing/maintaining water quality until handover
35 13 Handover documents
38 Annex A (informative) Guide to materials used for installation
A.1 Introduction
A.2 Copper
A.3 Plastic
39 A.4 Mild steel
40 A.5 Thin-walled carbon steel
A.6 Stainless steel
41 A.7 Aluminium
A.8 Brass
Annex B (informative) Methods suitable for cleaning new systems
B.1 Mains pressure flushing
42 B.2 Powerflushing
43 B.3 Gravity flushing
B.4 Recirculation filtration
44 B.5 Chemical cleaning of pipework
45 B.6 Flushing of terminal units
B.7 Flushing of boilers, HIU and CIU and bringing them on-line
B.8 Final dosing of circuits after cleaning
B.8.1 General
B.8.2 Biocides
46 B.8.3 Inhibitor

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BSI 23/30480279 DC 2023
$13.70