164
DHW
Fuel cell
Information
48 °C
Heating
Boiler water temperature
Select with
(
Fig. 125
Heating mode
The control unit determines a set boiler water tempera-
ture subject to outside temperature or room tempera-
ture (if a room temperature-dependent remote control
is connected) and to the slope
/
level of the heating
curve.
The determined set boiler water temperature is trans-
ferred to the burner control unit. From the set and
actual boiler water temperatures, the burner control
unit calculates the modulation level and regulates the
burner accordingly.
The electronic temperature limiter inside the burner
control unit limits the boiler water temperature.
Heating the DHW loading cylinder from cold
The heating circuit pump is switched ON and the 3-
way diverter valve will be changed over, if the cylinder
temperature sensor captures a temperature lower than
the defaulted set value.
■
The cylinder loading pump is switched ON if the
boiler water temperature
≥
set cylinder temperature.
■
The burner is switched ON if the boiler water temper-
ature
≤
set cylinder temperature, and the cylinder
loading pump is switched ON when the required
boiler water temperature is reached.
The loading cylinder is heated up to the set cylinder
temperature. Heating stops when the specified temper-
ature has been reached at the cylinder temperature
sensor.
After loading has stopped, the cylinder loading pump
and the 3-way diverter valve remain on for a further
30 s.
Operating the fuel cell module
The fuel cell module is switched to power generation
according to the heat-up condition of the integral heat-
ing water buffer cylinder and the energy manager
defaults. Heating energy generated during operation is
directed to the heating water buffer cylinder.
If the energy manager is enabled, the fuel cell module
starts to best meet the power demand. Start times will
depend, among other things, on the consumption pat-
tern in the household mains.
If the energy manager is disabled, the fuel cell module
starts solely on the basis of heat demand.
The regeneration phase of the fuel cell module com-
mences after expiry of the daily maximum runtime.
The fuel cell module process allows just one starting
procedure for power generation in any 24 hour period.
If the maximum return temperature on the fuel cell
module has been reached, the module shuts down.
Reheating when DHW is drawn off
When DHW is drawn off, cold water enters the lower
section of the loading cylinder.
Function description
Control unit
5775 636 GB
Functions
Содержание C3TB
Страница 44: ...44 3 5 1 2x 2 4 7 6 Fig 43 Installation sequence Fitting the front panels 5775 636 GB Installation ...
Страница 48: ...48 14 Fig 47 Installation sequence If required for easier handling Dismantling cont 5775 636 GB Installation ...
Страница 136: ...136 Troubleshooting Repairs gas condensing module cont 5775 636 GB Diagnosis ...
Страница 143: ...143 Parts lists Heat cell assembly 5775 636 GB Components ...
Страница 148: ...148 0001 0001 0003 0003 0002 0002 0004 Fig 118 Parts lists External connection assembly 5775 636 GB Components ...
Страница 154: ...154 0006 0003 0005 0001 0002 0004 Fig 121 Parts lists Miscellaneous assembly 5775 636 GB Components ...
Страница 160: ...160 Parts not shown 0009 PCB IU100 B30 Parts lists Fuel cell assembly 5775 636 GB Components ...
Страница 161: ...161 Parts lists Fuel cell assembly cont 5775 636 GB Components ...
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