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

Constant temperature control unit
DHW heating with gas fired combi boilers
If the flow switch detects that hot
water is being extracted (> 3 l/min)
then the burner, circulation pump and
3-way valve are switched on or chan-
ged over. The burner modulates
according to the DHW outlet tempera-
ture and is limited by the temperature
limiter (82 °C) on the boiler side.
DHW heating with a gas fired boiler
The burner, the circulation pump and
the three-way valve are started or
changed over if the cylinder tempera-
ture lies 2.5 K below the set cylinder
temperature.

Weather-compensated control unit

Control and display elements
A Pressure gauge
B Fault indicator (red)
Function description
(cont.)
In the delivered condition, the set boil-
er water temperature is 20 K higher
than the set DHW temperature (adjus-
table via coding address "60"). The
burner will be switched OFF and the
circulation pump run-on time will
begin, if the actual cylinder tempera-
ture exceeds the set cylinder tem-
perature by 2.5 K.
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