Weather-Compensated Control Unit - Viessmann VITODENS 200-W Installation And Service Instructions Manual

Function description
Constant temperature control unit
In the delivered condition, the set boiler
water temperature is 20 K above the set
DHW temperature (adjustable via coding
address "60" in group "DHW" (weather-
compensated control units) or group 3
(constant temperature control units).
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.

Weather-compensated control unit

14°C
Boiler temperature
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.
140
HC1
21°C
48 °C
(cont.)
The electronic temperature limiter inside
the burner control unit limits the boiler
water temperature.