Cleaning The Dhw Cylinder; Checking And Replacing The Protective Magnesium Anode (If Required) - Viessmann Vitodens 222-F Installation And Service Instructions For Contractors

Commissioning, inspection, maintenance

Cleaning the DHW cylinder

Note
According to EN 806, a visual inspection and (if neces-
sary) cleaning must be carried out no later than
2 years after commissioning, and as required there-
after.
Fig. 38
1. Drain the DHW cylinder.
2. Remove the flange cover.
3. To prevent contaminants entering the pipework,
separate the DHW cylinder from the pipework.
4. Remove loose deposits with a high pressure
cleaner.
!
Please note
When cleaning the inside,
only use plastic cleaning utensils.

Checking and replacing the protective magnesium anode (if required)

Check the protective magnesium anode. If it is discov-
ered that the anode has degraded to 10 to 15 mm Ø,
we recommend replacing the protective magnesium
anode.
46
8x
2.
5. Use a chemical cleaning agent to remove hard
deposits that cannot be removed with a high pres-
sure cleaner.
!
Please note
Never use hydrochloric acid
based cleaning agents.
6. Flush the DHW cylinder thoroughly after cleaning.