36
!
Please note
To prevent appliance damage,
Do not vent the boiler via the safety valve on the
heating water side.
1.
Close shut-off valves
B
on the heating water side.
2.
Open air vent valve
C
and fill valve
A
in the heat-
ing flow. Vent (flush) under mains pressure until no
more air noise is audible.
3.
Close air vent valve
C
and fill valve
A
. At the
same time, adjust operating pressure
>
1.0 bar
(0.1 MPa).
Note
Call up the pressure indicator in the "System
overview" menu point. See operating instructions.
4.
Open shut-off valves
B
on the heating water side.
5.
Remove drain hose from air vent valve
C
and
keep safe.
Venting the heating system
Fig. 27
1. Check whether the air vent screw in quick-action
air vent valve
A
of the heating circuit pump is
open.
2. Close the gas shut-off valve. Switch the appliance
on.
3. Activate venting function (see following steps).
4. Call up the pressure display with "System over-
view".
Check the system pressure.
Activating the venting function
Tap the following buttons:
1.
2. "Service"
3. Enter password "viservice".
4. Use to confirm.
5. "Service functions"
6. "Air vent valve"
Commissioning, inspection, maintenance
Venting the boiler
6151778
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