21
Settings Heat circuit
The characteristic curve is used to control the heat dissipation of the heating circuit
relative to the outdoor temperature.
The demand for heat is different due to differences in the type of building/insulation/
type of heating/outdoor temperature. 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
standard slope has to be set, after that the split point and
fi
nally the steepness of the
curve after the split. While adjusting the curve the steepness of the slope and the cal-
culated 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
The diagram shows the in
fl
uence of the selected characteristic 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 calculated maxi-
mum
fl
ow temperature and the minimum outdoor temperature.
Example:
Maximum calculated
fl
ow temperature 60°C at minimum outdoor temperature accord-
ing to heat demand calculation -12°C.
The intersection results in a slope of 1.2.
5.1.3. - Curve
Example:
Maximum calculated
fl
ow temperature
60°C at minimum outdoor temperature ac-
cording to heat demand calculation -12°C.
The intersection results in a slope of 1.2.