144
48 °C
Boiler temperature
HC1
14°C
21°C
Heating mode
The control unit determines a set boiler
water temperature subject to outside
temperature or room temperature (if a
room temperature-dependent remote
control is connected) and to the slope/
level of the heating curve.
The determined set boiler water temper-
ature is transferred to the burner control
unit. From the set and actual boiler water
temperatures, the burner control unit cal-
culates the modulation level and regu-
lates the burner accordingly.
The electronic temperature limiter inside
the burner control unit limits the boiler
water temperature.
DHW heating
The burner and the circulation pump for
cylinder heating are started if the cylinder
temperature lies 2.5 K below the set cyl-
inder temperature.
In the delivered condition, the set boiler
water temperature is 20 K higher than
the set DHW temperature (adjustable via
coding address "60" in group
"DHW"
/
3
).
The burner will be switched off and the
circulation pump run-on time will begin,
if the actual cylinder temperature
exceeds the set cylinder temperature by
2.5 K.
Function description
Weather-compensated control unit
5623 520 GB
