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- Chemical changes in the untreated system water
Suitable chemicals and their use should be discussed with a specialist water treatment
company prior to carrying out any work (environmental aspects, health aspects). The
specification of the system and manufacturers recommendations must be taken into
account, along with the age and condition of the system. New systems should be flu-
shed thoroughly to remove all traces of flux, debris, grease and metal swarf generated
during installation. Care to be taken with old systems to ensure any black metallic iron
oxide sludge and other corrosive residues are removed, again by thoroughly flushing,
ensuring that the system is drained completely from all low points.
NOTE:
Please ensure that the new boiler plant is not in circuit when the flushing takes
place, especially if cleansing chemicals are used to assist the process.
IMPORTANT:
Under no circumstances is the boiler to be operated with cleaning che-
micals in the system
.
To Summarise:
- Minimise water loss
- Prevent pumping over in open vented systems
- Provide adequate air venting at all high points
- Maximum chlorine content of 200 mg/l
Take advice on the suitability of inhibitors for use with aluminium
MAX pH of 8.5 when using additives (max. pH of 9 without additives)
If water treatment is used, we recommend the following products:
‘Copal
’ manufactured by
Fernox Manufacturing Company Ltd.
Britannia Works
Clavering
Essex, CB1L 4QZ
Tel No: 0179 955 0811
Fax No: 0179 955 0853
or: Sentinal ‘X100
’ manufactured by
BetzDearborn Ltd
Sentinal
Foundry Lane
Widnes
Cheshire WA8 8UD
Tel No: 0151 424 5351
Fax No: 0151 420 5447
For the correct dosage and for further information on water treatment or system clea-
ning we advise direct contact with either of the above companies.
