Viessmann Vitotronic 200 Installation And Service Instructions For Contractors page 114

Function description
Control of the heating circuits
Example using the settings in the delivered condition
90
80
70
60
50
40
30
Fig. 48
Heating curve for operation at standard room tem-
A
perature
Heating curve for operation at reduced room tem-
B
perature
Reducing the heat-up time
During the transition from operation with reduced room
temperature to operation with standard room tempera-
ture, the boiler water or flow temperature will be raised
in accordance with the selected heating curve. The
boiler water or flow temperature increase can be auto-
matically raised.
114
(cont.)
10 5 0 -5 -10
Outside temperature in °C
A
B
-15 -20
The value and duration for the additional raising of the
boiler water temperature or set flow temperature can
be set in parameters "27" and "28" in the "Heating cir-
cuit..." group.