Filling The Siphon With Water - Viessmann VITODENS 200-W WB2B Service Instructions For Contractors

Commissioning, inspection, maintenance
Further details regarding the individual steps
2. Activate the venting program via
coding address "2F:1".
Note
To call up code 1 and for setting the
coding address, see page 36.
For function and sequence of the
venting program, see page 96.
Whilst the venting program runs,
the display shows "EL" (constant
temperature control unit) or
"Entlüftung" (Venting) (weather-
compensated control unit).

Filling the siphon with water

10
(cont.)
3. Check the system pressure.
1. Pull off cap A downwards.
2. Undo union nut B and pull off
siphon C downwards.
3. Fill siphon C with water and refit it.
4. Push on cap A from below.