Viessmann VITOCROSSAL CI, Operating Instructions Manual

Page: 20 / 48

20
Setting the time program for central heating
Factory setting: One time phase from 06:00 to 22:00 h
for every day of the week
Extended menu:
1.
2.
"Heating"
3. / for the required heating circuit if necessary
4.
"Heating time program"
5. Set the required time phases.
To see how to set a time program, see page 14.
Note
When adjusting the setting, bear in mind that your
heating system requires some time to heat the rooms
to the required temperature.
Heating curve
Further information can be found in chapter
"Terminology" in the appendix.
Setting the heating curve
Factory setting:
■ "Slope" : 1.4
■ Heating curve "level" : 0
Extended menu:
1.
2.
"Heating"
3. / for the required heating circuit if necessary
4.
"Heating curve"
5. "Slope" or "Level"
6. Set the required value.
Note
If you press ? , you will be given tips on how to set
the heating curve.
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.
Heating curve
Change with
(
HC1
Slope
1.5
100°C
20 10 0
-10
-20 -30
41°C
55°C
68°C
81°C
23°C
Fig. 13
Depending on various outside temperatures (shown on
the horizontal axis), the assigned set flow tempera-
tures for the heating circuit are shown highlighted in
white.
Stopping central heating
For the preferred heating circuit For all heating circuits
Standard menu
1. / for the operating program:
■
"Only DHW" (no central heating)
or
■
"Standby mode" (frost protection active)
2. OK
Extended menu
1.
2.
"Heating"
3. / for the required heating circuit if necessary
4.
"Heating program"
5. "Only DHW" (no central heating)
or
"Standby mode" (frost protection active)
Central heating
Time program
(cont.)
5814953