68
2.
Connect the tester (measuring range up to 5 mA)
in series across tab
B
and earth cable
A
.
Anode earth
current
Protective magnesium anode
> 0.3 mA
Function OK
< 0.3 mA
Visual inspection required: See
chapter "Testing the protective
magnesium anode".
Testing the protective magnesium anode
We recommend replacing the magnesium anode once
it has been reduced to a diameter of 10 to 15 mm.
Replacing the protective 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"
!
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
(see
Fig. in chapter "Cleaning the DHW cylinder"). If
the resistance is significantly less than infinity,
check whether the magnesium anode is touch-
ing the internal indirect coil.
Commissioning, inspection, maintenance
Measuring the anode earth current with an anode…
(cont.)
51
17 700 GB
