Fill the system with water until the segment display of the filling level indicator is
at "OPT". Since the filling level sensor is only located in the topmost 40 cm of the
LATENTO, it takes some time for the filling level to be indicated on the display. Put
the display into filling mode during filling! With the system switched off, keep the
button pressed until the word "LONG" appears in the display. The display then
remains switched on for about 15 minutes.
After filling, close the KFE valve and the cover for the E-heating rod again.
7. Avoiding heat losses
You can operate the system as economic as possible also by avoiding heat-losses.
Aside from insulating all hot-water carrying pipes and fittings, there are further
measures possible to avoid heat-losses:
Circulation pipes will always cause heat-losses!
Planning the tap connections favourably, a one-family house can do without
circulation pipes.
In case circulation pipes should really be necessary, a circulation pump and a
circulation control unit should be installed. Using the circulation control, the cir-
culation pump will only be switched on if required (e.g. switch in the bathroom,
short opening of the hot water, etc.) and only when the temperature in the
pipelines has dropped below a defined value. In addition, the running time of
the circulation pump should be set to a very short time.
The pump operating as circulation pump should be as small as possible.
Heat-losses are caused through circulations too. By installing heat siphons
into all hot water pipes (DHW, heating and solar), the micro circulation
can be reduced.
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