Setting The Time And Date (If Required) - For Constant Temperature Control Units; Venting The Boiler - Viessmann VITODENS 200-W Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps
Setting the time and date (if required) - for constant temperature
control units
The time and date need to be reset dur-
ing commissioning or after prolonged
time out of use. After starting the system,
the display flashes the time ( ).
Press the following keys:
1. / for the required time.

Venting the boiler

B
1. Close the shut-off valves on the heat-
ing water side.
2. Connect the drain hose between top
valve B and a drain outlet.
10
(cont.)
2. OK to confirm; the new time unit is
saved,
3. / for the required date.
4. OK to confirm; the new date is
saved.
A
3. Open valves A and B, and vent at
mains pressure until no sound of
escaping air can be heard.
appears.