Viessmann VITOLIGNO 300-C Operating Instructions Manual page 20

Central heating
Changing the heating curve
Heating characteristics
The living space is too cold during
spring/autumn and during the heating
season.
The living space is too hot during
spring/autumn and during the heating
season.
The living space is too cold during
spring/autumn, but warm enough during
the heating season.
The living space is too hot during
spring/autumn, but warm enough during
the heating season.
Press the following keys:
1. for "Extended menu".
å
2. / to select "Heating".
| ~
3. to confirm.
d
4. / to select "Heating circuit 1" (HC1), "Heat-
Ù Ú
ing circuit 2" (HC2), "Heating circuit 3"
(HC3) or "Heating circuit 4" (HC4).
5. / for "Heating curve".
| ~
6. to confirm.
d
7. / for "Slope"
| ~
or "Level".
8. to confirm.
d
9. / for the required value.
| ~
Heating curve
100°C
23°C
55°C
41°C
20 10 0
Slope
Change with
Fig.18
20
(cont.)
Measures
Adjust the heating curve level to the
next highest value (e.g. +3).
Adjust the heating curve level to the
next lowest value (e.g.
Set the heating curve slope to the next
lower value and the level to a higher
value.
Set the heating curve slope to the next
higher value and the level to a lower
value.
HC1
81°C
68°C
-10 -20 -30
1.5
(
3).
−
10. to confirm.
d
11. until the standard display is shown.
ä
Note
Setting the heating curve slope or level too high or too
low will not result in damage to your heating system.
For technically-minded system users
■ Heating curves illustrate the relationship between the
outside temperature and the flow temperature. Sim-
plified: The lower the outside temperature, the higher
the flow temperature.
The illustrated heating curves apply with the following
settings:
■ Heating curve level = 0
A different value for level shows a curve which is off-
set in parallel to the vertical.
■ Standard room temperature = approx. 20 °C
In the delivered condition, the slope is set to 1.4, and
the level to 0.
Example
Slope 1.4
Level 3 K
Slope 1.4
Level -3 K
Slope 1.3
Level 3 K
Slope 1.5
Level -3 K