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eLibrary > 23/30480279 DC 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 >

23/30480279 DC 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, 2023

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23/30480279 DC 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, 2023

30480279_Form 36
30480279_text [Go to Page]
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols [Go to Page]
3.1 Terms and definitions [Go to Page]
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
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)
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
3.2 Symbols
4 System design and installation [Go to Page]
4.1 Accessibility and maintainability [Go to Page]
4.1.1 Location and labelling
4.1.2 Isolation of plant and equipment
4.1.3 Air vents and drain points
4.1.4 Flushing connections
4.2 Protection for sensitive plant and terminal units [Go to Page]
4.2.1 Sensitive plant and terminal units
4.2.2 Bypasses for terminal units
4.2.3 Flushing facilities for chilled beams, radiant panels and FCUs
4.2.4 Flushing facilities for underfloor heating systems
4.2.5 Flushing facilities for radiators [Go to Page]
4.2.5.1 General
4.2.5.2 Radiators
4.2.6 Flushing facilities for trench heating or cooling
4.2.7 Flushing facilities for radiant panels and chilled beams/panels
4.3 Heating and cooling sources flushing facilities [Go to Page]
4.3.1 Boilers and heat pumps
4.3.2 HIU and CIU
4.4 Dynamic flushing flow measurement
4.5 Use of strainers
4.6 Dosing facilities
4.7 Drainage facilities
5 Materials of construction
6 Filling/flushing water supply
7 Initial filling of systems and expansion vessels [Go to Page]
7.1 Filling
7.2 Pressure testing
8 Make-up water to systems that are in operation [Go to Page]
8.1 General
8.2 System fill water supply
8.3 Sealed systems
8.4 Open vented recirculating systems
9 Microbiological control prior to cleaning
10 Pre-commission cleaning methodologies [Go to Page]
10.1 Introduction
10.2 Temporary pumps [Go to Page]
10.2.1 Temporary pump arrangement
10.2.2 Pre-works planning
10.3 Flushing and cleaning [Go to Page]
10.3.1 General
10.4 Water quality specifications
11 Validation of water condition [Go to Page]
11.1 General
11.2 Validation criteria
11.3 Sampling and analysis plan
11.4 Water quality parameters
12 Mothballing/maintaining water quality until handover
13 Handover documents
Annex A (informative) Guide to materials used for installation [Go to Page]
A.1 Introduction
A.2 Copper
A.3 Plastic
A.4 Mild steel
A.5 Thin-walled carbon steel
A.6 Stainless steel
A.7 Aluminium
A.8 Brass
Annex B (informative) Methods suitable for cleaning new systems [Go to Page]
B.1 Mains pressure flushing
B.2 Powerflushing
B.3 Gravity flushing
B.4 Recirculation filtration
B.5 Chemical cleaning of pipework
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 [Go to Page]
B.8.1 General
B.8.2 Biocides
B.8.3 Inhibitor [Go to Page]

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23/30480279 DC 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, 2023

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