Viessmann VITORONDENS 200-T Service Instructions Manual page 11

Further details regarding the individual steps
■ Combustion residues may create thin,
yellow-brown surface discolouration
as well as hard deposits that may only
become visible after removing the soot
deposits. Use slightly acidic, chloride-
free cleaning agents based on phos-
phoric acid to remove surface disco-
louration and hard deposits (e.g. Antox
75 E *1 )
■ Remove loose deposits from the heat
exchanger; flush the heating surface
thoroughly with water.
Heating surface of the heat exchanger
A
A Water hose
Generally, heat exchangers are cleaned
with the aid of a water hose from the
boiler front through to the hot gas flues.
1. Remove contamination from the con-
nector using a vacuum cleaner.
*1 Manufacturer: Hebro Chemie GmbH, Rostocker Strasse 40, D-41199 Mönchen-
gladbach
Commissioning, inspection, maintenance
(cont.)
Cleaning agent manufacturer's
details
2. Thoroughly flush the heating surface
with water.
Note
In the case of severe contamination (e.g.
through incorrect burner adjustment),
remove the heat exchanger to clean the
boiler.
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