Viessmann VITOLIGNO 300-C Operating Instructions Manual page 49

Vitoligno 300-C Operating
Terminology
(continued)
Outdoor temperature
Factory settings: Slope = 1.4 and shift = 0.
A Changing the slope: The steepness of the heating
curve changes
B Changing the shift: The heating curves are shifted
in parallel in a vertical direction
Actual temperature
Current temperature at the time of the scan; e.g. actual
DHW 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
periods, the rooms are heated to the standard room
temperature.
Standard room temperature
When you are in the house during the day, set the
standard room temperature (see page 18).
Open flue operation
The combustion air is drawn from the room where the
boiler is installed.
Balanced flue operation
The combustion air is drawn from outside the building.
Reduced heating mode
When you are out or during the night, you can heat the
rooms in reduced heating mode (setback mode). Set the
periods using the time program for central heating. During
these periods, the rooms are heated to a reduced room
temperature.
Maintenance
49