27
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). Mini-
mum system pressure > 1.0 bar (0.1 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
For function and details of the fill program, see
page 128.
6.
Close boiler drain & fill valve
A
.
Activating the filling function
Weather-compensated control unit
Constant temperature control unit
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
.
Service menu
1. Press
OK
and
å
simultaneously for approx. 4 s.
2. Select "
4
" and confirm with
OK
.
"ON"
flashes.
3. Activate the filling function with
OK
.
"bF on"
is shown constantly.
4. Ending filling function:
Press
ä
.
Filling the DHW cylinder on the DHW side
Fig. 18
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
Selecting the language - only for weather-compensated control units
At the commissioning stage, the display is in German
(factory setting).
Extended menu:
1.
å
2.
"Einstellungen"
Commissioning, inspection, maintenance
Filling the heating system
(cont.)
5773 216 GB
Summary of Contents for B2TA
Page 101: ...101 Parts lists Overview of assemblies 5773 216 GB Components ...
Page 107: ...107 Parts lists Hydraulics 5773 216 GB Components ...
Page 118: ...118 0004 0002 0005 0006 0001 0003 Fig 77 Parts lists Miscellaneous 5773 216 GB Components ...
Page 142: ...142 5773 216 GB ...
Page 143: ...143 5773 216 GB ...