Filling The Siphon With Water; Setting The Time And Date (If Required) - Only For Weather-Compensated Control Units; Language Selection (If Required) - Only For Weather- Compensated Control Units - Viessmann Vitodens 333 Service Instructions Manual

Further details regarding the individual steps

Filling the siphon with water

Setting the time and date (if required) – only for weather-
compensated control units
Note
During commissioning, or after a prolonged time out of use, it may be necessary
to reset the time and date, if the time flashes in the display.
Press the following keys:
1. a/b for the current time.
2. d
to confirm; "Date" is dis-
played.
Language selection (if required) - only for weather-compen-
sated control units
Press the following keys:
1. c "Select a heating circuit" will
be displayed.
2. d to confirm; wait approx. 4 s.
Initial start-up, inspection, maintenance
(cont.)
1. Remove the retaining clip and
siphon A.
2. Fill the siphon with water.
3. Fit the siphon A and secure with
the retaining clip.
3. a/b for the current date.
4. d
to confirm.
3. c Press again.
4. b for the required language.
5. d to confirm.
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