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10.3 Curve Menu 5.3 = Slope of the characteristic heating curve
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 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 nally the steepness
of the curve after the split. While adjusting the curve the steepness of the slope
and the calculated reference 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 steepnes and split point
The diagram shows the influence of the selected characteristic curve
steepness (standard curve) on the calculated reference ow temperature of
the heating circuit. The correct curve is appointed by setting the intersection
point of the calculated maximum ow temperature and the minimum outdoor
temperature.
Example:
10. Settings HC (continued)
Settings Heat circuit Menu 5
10 10
Maximum calculated ow temperature
60°C at minimum outdoor temperature
according to heat demand calculation
-12°C.
The intersection results in a slope of
1.2.
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