55
1.
8x
B
A
2.
Fig. 51
!
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
A
and
B
. If the
resistance is significantly less than infinity, check
whether the magnesium anode is touching the
internal indirect coil.
Measuring the anode earth current with an anode tester
1.
Remove cover and pull earth cable
A
from tab
B
:
See Fig. in chapter "Cleaning the DHW cylinder".
2.
Connect the tester (measuring range up to 5 mA) in
series across tab
B
and earth cable
A
.
Anode pro-
tective cur-
rent
Magnesium anode
> 0.3 mA
Function OK
< 0.3 mA
Visual inspection required: See
chapter "Checking the magnesium
anode".
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.
Magnesium anode removal: See Fig. in chapter
"Cleaning the DHW cylinder"
Commissioning, inspection, maintenance
Cleaning the DHW cylinder
(cont.)
5700 562 GB
