Viessmann VITOCROSSAL 200 Instructions Manual page 65

Water quality requirements
(cont.)
Where chemicals are used as part of the
corrosion protection, we recommend
that the manufacturer of the chemicals
issues a certificate of suitability of the
additives with regard to the boiler mate-
rials and the materials of the other heat-
ing equipment components. We recom-
mend you refer questions of water qual-
ity/treatment to an appropriate specialist.
Further details can be found in VDI
Directive 2035-2 and EN 14868.
65