Viessmann Vitovalor PT2 Installation And Service Instructions For Contractors page 153

Control functions
(cont.)
Example using the settings in the delivered condition
90
80
70
60
50
40
30
Fig. 113
Heating curve for operation at standard room tem-
A
perature or comfort room temperature
Heating curve for operation at reduced room tem-
B
perature
Reducing the heat-up time
During the transition from operation at reduced room
temperature to operation at standard room tempera-
ture or comfort room temperature, the flow tempera-
ture will be raised in accordance with the selected
heating curve.
10 5 0 -5 -10
Outside temperature in °C
A
B
-15 -20
The value and duration of the additional increase in the
set flow temperature is adjusted in parameters 424.3
and 424.4.
Function description
153