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Water Quality
Filling the System
90
Vitocal 100-AW AM2V Installation, Service and Operating
Water quality
Treatment for Vitocal 100 AW feed water should
be considered in areas of known problems, such as
where a high mineral content and hardness exist.
In areas where freezing might occur, an antifreeze
may be added to the system water to protect the
system. Please adhere to the specifications given
by the antifreeze manufacturer.
Do not use automotive silicate based antifreeze.
Please observe that an antifreeze/water mixture
may require a backflow preventer within the
automatic water feed and influence components
such as diaphragm expansion tanks, radiation, etc.
Maximum antifreeze content is 50% for the Vitocal
100 AW.
Do not use sulphur-containing Vitocal feed water.
Check pH-level after some operating time. It should
be in the range from 8.2 to 9.5. If it is not, please
take appropriate measures. Total permissible
hardness of the fill and top-up water - 70 ppm.
Do not use antifreeze other than specifically made
for hot water heating systems. System also may
contain components which might be negatively
affected by antifreeze. Check total system
frequently when filled with antifreeze. Advise
system operator/ultimate owner that system is
filled with a glycol mix. The heating contractor
must provide a SDS (Safety Data Sheet) for the
antifreeze used to the system operator/ultimate
owner.
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