Heating mode
The control unit determines a set boil-
er water temperature subject to the
outside temperature or room tempera-
ture (if a room temperature-dependent
remote control is connected) and the
slope/level of the heating curve. The
determined set boiler water tempera-
ture is transferred to the burner con-
trol unit.
From the set and actual boiler water
temperatures, the burner control unit
calculates the modulation level and
regulates the burner accordingly.
The boiler water temperature will be
limited:
&
to 76 °C by the temperature control-
ler inside the burner control unit.
&
to 84 °C by the electronic tempera-
ture limiter inside the burner control
unit (during DHW heating to 85 °C).
&
to 100 °C by the temperature limiter
in the safety chain (interlocks the
burner control unit).
DHW heating
The burner, circulation pump and
three-way valve are started or chan-
ged over if the flow switch detects that
water is drawn off (>3 l/min).
The burner modulates to reach the
DHW outlet temperature and is limited
on the boiler side by the temperature
limiter (85°C).
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