Measuring The Anode Earth Current With An Anode Tester; Checking The Magnesium Anode; Replacing The Magnesium Anode - Viessmann VITOCAL 222-S Installation And Service Instructions Manual

Cleaning the DHW cylinder
8x
1.
Fig. 51

Measuring the anode earth current with an anode tester

1. Remove cover and pull earth cable
See Fig. in chapter "Cleaning the DHW cylinder".

Checking the magnesium anode

We recommend replacing the magnesium anode once
it has been reduced to a diameter of 10 to 15 mm.

Replacing the magnesium anode

Note
If the magnesium anode needs to be replaced, a main-
tenance-free impressed current anode (accessories)
can be used.
(cont.)
!
A B
2.
from tab : 2. Connect the tester (measuring range up to 5 mA) in
A B
series across tab
Anode pro-
tective cur-
rent
> 0.3 mA
< 0.3 mA
Magnesium anode removal: See Fig. in chapter
"Cleaning the DHW cylinder"
Commissioning, inspection, maintenance
Please note
A short circuit between the magnesium anode
and the internal indirect coil negates the protec-
tive effect of the magnesium anode. This leads
to corrosion damage on the DHW cylinder.
Before connecting the electrical cables, check
the resistance across terminals
resistance is significantly less than infinity, check
whether the magnesium anode is touching the
internal indirect coil.
and earth cable
B
Magnesium anode
Function OK
Visual inspection required: See
chapter "Checking the magnesium
anode".
and . If the
A B
.
A
55