39
4.
Fill the heating system via boiler drain & fill valve
A
in the heating return (depending on the connec-
tion set either on the side or above the boiler).
■
Minimum system pressure
>
1.0 bar (0.1 MPa).
■
Permissible operating pressure 3.0 bar (0.3 MPa).
Note
If the control unit was not switched on prior to filling
the system, then the servomotor of the diverter
valve will still be in its central position and the sys-
tem will be completely filled.
5.
If the control unit was already on before filling
began:
Switch the control unit ON and activate the fill pro-
gram (see next chapter).
Note
If the control unit was not switched on prior to filling
the system, then the servomotor of the diverter
valve will still be in its central position and the sys-
tem will be completely filled.
6.
Close boiler drain & fill valve
A
.
Activating the filling function
Service menu
1. Press
OK
and
å
simultaneously for approx. 4 s.
2.
"Service functions"
3.
"Filling"
Filling function is enabled.
4. Ending filling function:
Press
OK
or
ä
.
Filling the cylinder on the DHW side
Fig. 29
1.
The lever on valve
B
must be in the "left" position.
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.
Switching on the power supply and the ON/OFF switch
Changing the language
At the commissioning stage, the display is in German
(factory setting).
Extended menu:
1.
å
2.
"Einstellungen"
3.
"Sprache"
4. Select the required language with
/ .
Commissioning, inspection, maintenance
Filling the heating system
(cont.)
5773 238 GB
