Viessmann VITOCAL 111-S - Cleaning the DHW Cylinder

67
Note
If the protective magnesium anode needs to be
replaced, a maintenance-free impressed current anode
(accessories) can be used.
For removal of the protective magnesium anode: See
diagram in chapter "Cleaning the DHW cylinder".
!
Please note
A short circuit between the protective magne-
sium anode and the indirect coil negates the
protective effect of the magnesium anode. This
leads to corrosion damage on the DHW cylinder.
Before connecting the electrical cables, check
the resistance across terminals
A
and
B
(see
diagram in chapter "Cleaning the DHW cylin-
der"). If the resistance is significantly less than
infinity, check whether the protective magnesium
anode is touching the indirect coil.
Draining the appliance on the DHW side
A
B
C
Fig. 63
A
Operation
B
Drain the drinking water circuit in the appliance
excluding the DHW cylinder via the cold water
connection
C
Drain the drinking water circuit in the appliance
and the DHW cylinder via the DHW connection.
The cold water connection remains filled.
1. Connect the hose to the drain valve and route it
into a suitable container or drain outlet.
Note
Ensure adequate ventilation in the DHW pipework.
2.
Turn drain valve from lever position
A
to lever
position
B
or
C
as required.
Cleaning the DHW cylinder
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.
Commissioning, inspection, maintenance
Replacing the protective magnesium anode
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