Viessmann VITOTRONIC 100 Operating Instructions Manual page 55

Terminology
Factory settings: slope = 1.4 and level =
0.
110
+20
Outside temperature in °C
A Changing the slope:
The steepness of the heating curve
changes.
B Changing the level:
The heating curves are shifted in
parallel in a vertical direction.
Heating circuit
A heating circuit is a sealed circuit
between the boiler and radiators, in
which the heating water circulates.
A heating system may comprise several
heating circuits. For example, one heat-
ing circuit for the rooms occupied by you
and one heating circuit for the rooms of
a separate apartment.
Heating circuit pump
Circulation pump for the circulation of the
heating water in the heating circuit.
(cont.)
3.5
1.4
A
B
0.2
-20
Actual temperature
Current temperature at the time of the
scan; e.g. actual DHW temperature.
Mixer
A mixer mixes the water heated in the
boiler with the cooled water returning
from the heating circuit. The water,
heated to the right temperature in line
with demand, is delivered to the heating
circuit by the heating circuit pump. The
control unit adjusts the heating circuit
flow temperature via the mixer to the var-
ious conditions, e.g. different outside
temperature.
Night setback
See "Reduced heating mode".
Standard heating mode
When you are in the house during the
day, you can heat the rooms in standard
heating mode. Set the periods using the
time program for central heating. During
these times, the rooms are heated to the
standard room temperature.
Standard room temperature
Set the standard room temperature
when you are at home during the day
(see chapter "Setting the room temper-
ature").
Open flue operation
The combustion air is drawn from the
room where the boiler is installed.
Appendix
55