24
Settings
5.6.3. - Curve
The characteristic curve is used to control the heat dissipation of the heating circuit relative to the outdoor tempera-
ture.
The demand for heat is different due to differences in the type of building/insulation/type of heating/outdoor tem-
perature. For this reason the controller can make use of a normal straight curve (Setting simple) or a split curve
(Setting split).
In the simple setting the curve can be adjusted with the help of the graphic diagram. The slope is changed, and the
calculated reference
fl
ow temperature is displayed for -12 °C.
If the split mode is selected, the characteristic curve is adjusted in 3 steps. First the split point has to be set, after
that the standard slope and
fi
nally the steepness of the curve after the split. While adjusting the curve the steep-
ness of the slope and the calculated reference
fl
ow temperature for -12 °C outdoor temperature is displayed.
Settings range:
Characteristic curve : simple or split / Default: simple
Slope : 0.0...3.0 / Default: 0.8
Splitpoint at outdoor temp.: +10°C...-10°C
Angle: differs, depends on steepness and split point
Heat
in
g cir
cu
it
5.6.4. - Day correction
Parallel translation of the characteristic curve
The day correction produces a parallel translation of the heating characteristic during the daytime operating hours,
since depending on the outdoor temperature it is possible that the building may not be optimally heated with the set
characteristic. If the characteristic is not optimised, the following situation may occur:
in hot weather - the spaces are too cold
in cold weather - the spaces are too hot
In this case, one should gradually reduce the characteristic slope in steps of 0.2, each time raising the day correc-
tion by 2-4 °C.
This procedure can be repeated several times as needed.
Setting range: from -10°C to 50°C / default setting: 5 °C
The diagram shows the in
fl
uence of the selected charac-
teristic curve steepness (standard curve) on the calculated
reference
fl
ow temperature of the heating circuit. The correct
curve is appointed by setting the intersection point of the cal-
culated maximum
fl
ow temperature and the minimum outdoor
temperature.
Example:
Maximum calculated
fl
ow temperature 60°C at minimum
outdoor temperature according to heat demand calculation
-12°C.
The intersection results in a slope of 1.2.
5.6.5. - Night correction
Parallel translation of the characteristic curve
The night correction produces a parallel translation of the heating characteristic during the nighttime operating
hours. If a negative value is set for the night correction, the reference
fl
ow temperature is lowered accordingly
during the nighttime operating hours. In this manner, primarily at night, but also during the day when no-one is at
home, the room temperature is lowered, thus saving energy.
Example: A day correction of +5°C and a night correction of -2°C produces a reference
fl
ow temperature in night-
time operation that is 7°C lower.
Setting range: from -30°C to 30°C / default setting: -2°C
5.6.6. - Comfort temperature boost
Parallel translation of the characteristic curve
The comfort temperature boost is added to the set day correction. In this manner it is possible to carry out quick
heating and/or a higher temperature in the living spaces at a certain time each day.
Setting range: from 0°C to 15°C / default setting: 0°C = off
Caution
The following settings can be used for parallel translation of the characteristic curve for certain time
periods such as daytime and nighttime mode.
