Viessmann Vitoligno 250-S Installation And Service Instructions For Contractors page 29

Adjusting the heating curves
Example for outside temperature
A Underfloor heating system, slope 0.2 to 0.8
Low temperature heating system, slope 0.8 to 1.6
B
Heating system with a boiler water temperature in
C
excess of 75 °C, slope 1.6 to 2.0
Adjusting the set room temperature
Individually adjustable for each heating circuit.
Standard room temperature
26°C
110
A
20°C
C
-20°C
B
E
D
Fig. 25 Adjusting the standard room temperature
from 20 to 26 °C
Flow temperature in °C
A
Outside temperature in °C
B
Set room temperature in °C
C
Heating circuit pump Off
D
E Heating circuit pump On
Reduced room temperature
110
A
14°C
3°C
C
B -20°C
D E
Fig. 26 Adjusting the reduced room temperature
from 3 to 14 °C
Flow temperature in °C
A
B Outside temperature in °C
Set room temperature in °C
C
Heating circuit pump Off
D
Heating circuit pump On
E
(cont.)
14 °C:
−
The heating curve is offset along the set room temper-
ature axis. With the heating circuit pump logic function
enabled, the curve modifies the starting and stopping
characteristics of the heating circuit pump.
Press the following keys in the standard menu:
1.
2.
3.
4.
5.
6.
7.
Press the following keys in the standard menu:
1.
2.
3.
4.
5.
6.
7.
8.
Commissioning, inspection, maintenance
/ For "Heating".
| ~
To confirm.
d
/ For selecting the heating circuit.
Ù Ú
/ For "Set room temp".
| ~
To confirm.
d
/ For the required temperature.
| ~
To confirm.
d
For "Extended menu".
å
/ For "Heating".
| ~
To confirm.
d
/ For selecting the heating circuit.
Ù Ú
/ For "Set red room temp".
| ~
To confirm.
d
/ For the required temperature.
| ~
To confirm.
d
29