Viessmann Vitocell 100-W Installation And Service Instructions For Contractors page 15

Cleaning the inside of the DHW cylinder
B
1x
7x
C
Fig. 7
1. Drain the DHW cylinder on the DHW side.
!
Please note
Material losses may result if the DHW cylin-
der is drained with the aid of a vacuum
pump and the air vent valve stays closed.
Open the air vent valve during draining.
2. Remove earth cable A
ket .
C
Checking and replacing the protective magnesium anode
Check the protective magnesium anode.
If 10-15 mm: Replace the protective magnesium
7 ≤
anode.
A
, flange cover B and gas-
Commissioning, inspection, maintenance
(cont.)
3. Disconnect the DHW cylinder from the pipework to
prevent cleaning agents and contaminants from
entering the pipework.
4. Remove loose deposits with a high pressure
cleaner.
!
Please note
Pointed or sharp cleaning tools will damage
the cylinder interior.
Only use plastic cleaning equipment to clean
the inside.
5. Use a chemical cleaning agent to remove hard
deposits that cannot be removed with a high pres-
sure cleaner.
!
Please note
Cleaning agents containing hydrochloric acid
will attack the DHW cylinder material.
Never use such cleaning agents.
Danger
Cleaning agent residues can cause poison-
ing.
Always observe the information provided by
the cleaning agent manufacturer.
6. Fully drain all cleaning agent.
7. Flush the DHW cylinder thoroughly after cleaning.
Note
A chain anode (accessories) is available for tight
spaces.
15