REMKO ETS300 - Manual (Page 9)

9
The potential equalisation of the piping
must take place in accordance with
DIN 50927.
This type of corrosion results
in the formation of corrosion cells.
Voltage is present in corrosion cells
between the anode and cathode
area. The processes are dependent
on oneanother, however, their separation
from one another can vary greatly.
Corrosion cells can appear as a result
of different potentials, as the case is with
contact corrosion. Different metals are
in conductive contact with one another
through an ion-conducting medium
(water).
All metal plug-in (built-in) components
with large metal surfaces (e.g. condenser
plug-in heat pumps, fin-tube heat
exchangers, electric heaters) must
be electrically insulated from the tank.
For the protection of the above-
mentioned plug-in (built-in) components
against the current-induced corrosion,
we recommend installing a defined
contact resistance of approx. 600 Ohm
(insofar as it has not already
been installed in the components
at the factory).
■ The hot water tanks may not
be transported with the fin-tube heat
exchanger installed.
■ The unit must be assembled on site.
■ For all connecting sockets, ensure
that the thread is fully engaged.
■ When installing a fin-tube heat
exchanger it must be absolutely
ensured that the corrosion protection
in the tank remains intact. Therefore,
when a fin-tube heat exchanger
is fitted, an appropriate external
current anode or magnesium anode
must be installed if the magnesium
anode is removed with the flange
plate from the tank.