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Slope of the characteristic heating curve
The characteristic curve is used to control the heat dissipation of the heating circuit re-
lative 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 flow temperature is displayed for
-12 °C.
If the split mode is selected, the characteristic curve is adjusted in 3 steps. First the stan-
dard slope has to be set, after that the split point and finally the steepness of the curve
after the split. While adjusting the curve the steepness of the slope and the calculated
reference flow 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
Settings Heating circuit
5.3 Curve
The diagram shows the influence of the
selected characteristic curve steepness
(standard curve) on the calculated re
-
ference flow temperature of the heating
circuit. The correct curve is appointed by
setting the intersection point of the calcu-
lated maximum flow temperature and the
minimum outdoor temperature.
Example:
Maximum calculated flow temperature
60°C at minimum outdoor temperature ac-
cording to heat demand calculation -12°C.
The intersection results in a slope of 1.2.