Viessmann VITOSOL 100-F Service Instructions Manual page 10

Commissioning, inspection, maintenance
Further details regarding the individual steps
03. Connect hoses of flushing and filling
facility N to drain valve G and fill
valve K.
04. Fill the container of flushing and fill-
ing facility N with heat transfer
medium.
05. Open drain valve G and fill
valve K.
06. Start the fill pump of flushing and fill-
ing facility N.
10
(cont.)
07. Observe the fluid level in the con-
tainer and top up with heat transfer
medium if necessary to prevent any
air entering the solar circuit. Leave
the fill pump of flushing and filling
facility N running until no more air
bubbles rise to the top of the con-
tainer (at least 20 to 30 min).
Note
Briefly open shut-off valve F
towards the end of the flushing proc-
ess: Using a screwdriver, turn the
slot on the adjusting screw above
the flow indicator to the vertical posi-
tion. Any air that remains in the
return is eliminated.
08. Close drain valve G. Leave the fill
pump of flushing and filling
facility N running until the required
charge pressure is reached.
Notes on residual ventilation
Even after thorough ventilation,
some dissolved air will still remain in
the heat transfer medium. This will
be released as the temperature
rises, and will be discharged via air
separator E.
09. Close fill valve K; stop the fill pump
of flushing and filling facility N.
The pressure must not drop for at
least 30 minutes.
10. Open shut-off valve F: Using a
screwdriver, turn the slot on the
adjusting screw above the flow indi-
cator to the vertical position.