Filling The Dhw Cylinder On The Dhw Side - Viessmann Vitodens 222-F Installation And Service Instructions Manual

Filling the heating system
5. If the control unit was already on before filling:
switch the control unit ON and activate the filling
function (see next chapter). Then switch the control
unit OFF again.
Activating the filling function
Tap the following buttons:
1. "Menu"
2. "Service"
3. Enter "viservice" password.

Filling the DHW cylinder on the DHW side

Fig. 21
Commissioning, inspection, maintenance
(cont.)
6. Close boiler drain & fill valve
4. "Service functions"
5. "Filling"
6. Activate the filling function with "Yes".
The filling function ends automatically after 20 min
or when you tap OK.
1. The lever on valve
2. Open the on-site DHW supply and a DHW draw-off
point.
3. Once air stops coming out of the DHW draw-off
point, the DHW cylinder is completely filled.
A .
must be in the "left" position.
B
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