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Control unit operation
Navigation in the control unit menu
A
Buffer drawing
Boiler
Buffer
Heating
DHW
B
Select with
Fig. 14
Boiler operating phase display
A
Dialogue line
B
The selected menu point is highlighted in white.
Boiler operating phases
The following operating phases are shown in line
After heat up, they are run through in sequence:
Operating phases:
Heat up
■
■
Load operation
■
Residual heat utilisation
■
Buffer drawing
Heat up
After charging and igniting the fuel, the boiler starts up.
Load operation
The boiler enters control mode in this phase. For this,
the air dampers are constantly regulated to the respec-
tive set value.
20
(
.
A
Dialogue line
provides the necessary instructions.
B
The fuel in the boiler is completely combusted. At the
same time, the generated heat is transferred to the
heating circuits and the heating water buffer cylinder.
Residual heat utilisation
After fuel burnout, the boiler is still warm. During this
phase, the residual heat of the boiler water is used to
supply the heating circuits and for DHW heating. When
the temperature of the boiler water is no longer suffi-
cient for this, the required heat is drawn from the heat-
ing water buffer cylinder.
Buffer drawing
The heat for the heating circuits and DHW heating
comes exclusively from the heating water buffer cylin-
der.
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