32
3.
Connect the fill hose to boiler drain & fill valve
A
in the heating flow. Either on the side or top of the
boiler depending on the connection set.
4.
Open shut-off valves
B
on the heating water side.
5.
Fit hose to air vent valve
C
. Route the hose into a
suitable container or drain outlet.
6.
Activate the filling function (see commissioning
assistant or following chapter).
7.
Fill the heating system via boiler drain & fill valve
A
. Minimum system pressure
>
1.0 bar (0.1 MPa).
Check the system pressure at pressure gauge
D
.
Indicator must be in the green band.
Note
Close air vent valve
C
and adjust system pres-
sure at boiler drain & fill valve
A
.
8.
Close boiler drain & fill valve
A
.
Activating the filling function
If the filling function is to be activated after commis-
sioning.
Tap the following buttons:
1.
and
OK
– press simultaneously for approx. 4 s,
then release.
2.
Use
/
to select
"Basic settings"
.
3. OK
4.
Use
/
to select
"Commissioning assistant"
.
5. OK
6.
/
for
"Next"
and
OK
until
"Filling"
appears.
7. OK
The filling function is activated. The display shows
the system pressure.
The filling function ends automatically after 20 min
or when you tap
OK
.
Venting the boiler
!
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.
Commissioning, inspection, maintenance
Filling the heating system
(cont.)
6130884
