Viessmann VITOTRONIC 300 Operating Instructions Manual page 29

Operating program
For information on the operating programs, see
page 19
Time program
Further information can be found in chapter
"Terminology" in the Appendix.
Setting a time program
Factory setting: One time phase from 00:00 to 24:00 h
for every day of the week
Tap the following buttons:
1. "Menu"
2. "Heating"
3. "Heating circuit 1", "Heating circuit 2" or "Heat-
ing circuit 3" as the required heating circuit
Heating curve
Further information can be found in chapter
"Terminology" in the Appendix.
Setting the heating curve
Factory setting:
■ "Slope": 1.4
■ "Level" of the heating curve: 0
Tap the following buttons:
1. "Menu"
2. "Heating"
3. "Heating circuit 1", "Heating circuit 2" or "Heat-
ing circuit 3" as the required heating circuit
4. "Heating curve"
5. +/ for the required value for "Slope" or "Level"
–
6. Press OK to confirm
Example: Changing the heating curve slope to 1.5
A graph clearly shows the change in the heating curve
as soon as you alter the value for the slope or level.
(cont.)
Central heating — Multi boiler system control
4. "Time program heating"
5. Press OK to confirm
Procedure for setting a time program, see page 19
Note
When adjusting the setting, bear in mind that your
heating system requires some time to heat the rooms
to the required temperature.
Heating circuit 1 heating curve
Flow temperature
100
75
23 °C 64 °C
50
50 °C
25
36 °C
0
20 10 0 -10
Outside temperature
Fig. 28
Depending on various outside temperatures (shown on
the horizontal axis), the assigned set flow tempera-
tures for the heating circuit are highlighted white.
Slope Level
91 °C
78 °C
1.5 . 1
-20 -30
OK
29