63
2.
Connect the tester (measuring range up to 5 mA)
in series across tab
A
of protective magnesium
anode and earth cable
B
.
Anode earth
current
Protective magnesium anode
> 0.3 mA
Function OK
< 0.3 mA
Visual inspection required: See
chapter "Testing the protective
magnesium anode".
3.
Insert thermal insulation
C
, ensuring it is imper-
meable.
Testing the protective magnesium anode
We recommend replacing the protective magnesium
anode once it has been reduced to a diameter of 10 to
15 mm.
Replacing the protective magnesium anode
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
Fig. in chapter "Cleaning the DHW cylinder"). If
the resistance is significantly less than infinity,
check whether the protective magnesium anode
is touching the indirect coil.
Commissioning, inspection, maintenance
Measuring the anode earth current with an anode…
(cont.)
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