Venting The Heating System; Setting The Time And Date (If Required) - Only For Weather-Compensated Control Units; Language Selection (If Required) - Only For Weather-Compensated Control Units - Viessmann VITOPEND 200 Installation And Service Instructions Manual

Further details regarding the individual steps
5. Close the boiler fill & drain
valve A.

Venting the heating system

1. Start the control unit.
2. Activate the venting program via
coding address "2F:1".
Note
To call up coding level 1 and for
setting the coding address, see
page 50.
For function and sequence of the
venting program, see page 105.
Whilst the venting program runs,
the display shows "EL" (Vito-
tronic 100) or "Venting" (Vito-
tronic 200).
Setting the time and date (if required) – only for weather‐
compensated control units
Note
During commissioning, or after prolonged time out of use, it may be necessary
to set the time and date, if the time flashes in the display.
Press the following keys:
1. a/b for the current time.
2. d
as confirmation; "Date" is
displayed.
Language selection (if required) – only for weather‐compen-
sated control units
Initial start-up, inspection, maintenance
(cont.)
6. Close the shut‐off valves on the pri-
mary side.
3. Check the system pressure.
3. a/b for the current date.
4. d
to confirm.
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