26
Venting the boiler
1.
Close the shut-off valves on the heat-
ing water side.
2.
Remove cover panel
A
.
3.
Connect the drain hose on valve
B
with a drain.
4.
Open air vent valve
B
and fill valve
C
in the heating return and vent
using mains pressure (flush) until no
more air noise can be heard.
5.
Close valve
B
and fill valve
C
in the
heating return, and open the shut-off
valves on the heating water side.
Venting the heating system
1.
Close the gas shut-off valve and
switch the control unit ON.
2.
Activate venting program (see next
steps).
Note
For function and sequence of the
venting program, see page 138.
3.
Check the system pressure.
Activating venting function with
weather-compensated control unit:
1.
Press
OK
and
simultaneously for
approx. 4 s.
2. "Service functions"
3. "Venting"
4.
Ending venting function:
Press
OK
or .
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5457 552 GB