Filling; Emptying - Würth IVT LATENTO XXL 500 Notice De Montage

Calibration
During calibration, keep the button pressed with the system switched off until
"RESET" appears in the display. Then press the button briefly again so that an
"X" appears under the "J". After the display has gone out again, calibration is
automatically completed. After calibration, the display initially indicates an empty
tank even when it is full. As after battery replacement, a slight increase in filling
level will lead to the correct filling level being indicated again.

6.5 Filling

After installation the filling level & temperature display must be calibrated (see
chapter 6.4)!
Fill the LATENTO XXL with drinking water via the filling and draining valve. Open
the cover for the optional E-heating rod to allow the air displaced by the filling
process to escape.
When using the E-heating rod:
Screw the heating rod as far out of the thread as necessary to allow displaced air
to escape.
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.

6.6 Emptying

If the LATENTO needs to be emptied, this can also be done via the fill/drain cock
on the storage tank cover.
The fill/drain cock is provided on the inside of the storage tank with an immer-
sion tube that reaches up to the tank bottom. This allows the LATENTO to be
emptied using a hose or via gravity (siphon principle) or via a pump.
To do so, as during filling, the cover for the optional electric heating rod must be
opened or the electric heating rod must be unscrewed from the thread, to avoid
the formation of a vacuum inside the storage tank.
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