Siemens AVS75.39 Series User Manual page 54

Heating curve
Heating curve slope
Heating curve
displacement
Heating curve adaption
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Siemens
Building Technologies
Line no.
HC1 HC2 HC3
720 1020 1320
721 1021 1321
726 1026 1326
The heating curve generates the flow temperature setpoint, which is used to
maintain a certain flow temperature depending on the prevailing weather
conditions.
The heating curve can be adjusted with a number of settings, thus matching heat
output and room temperature to individual needs.
As the heating curve slope is raised, the flow temperature increases the quicker
the lower the outside temperature or, in other words, if the room temperature is not
correct at low outside temperatures but correct at higher outside temperatures, the
heating curve slope requires readjustment.
Increasing the setting:
Decreasing the setting:
The set heating curve is based on a room temperature setpoint of 20 °C. If the
room temperature setpoint is adjusted, the heating curve adapts automatically to
the new value.
Parallel displacement of the heating curve is used to change the flow temperature
evenly across the entire outside temperature range or, in other words, if the room
temperature is always too high or too low, a readjustment must be made via
parallel displacement.
With this function the controller automatically adapts the heating curve to
prevailing conditions.
To assure this function, following must be observed:
A room sensor must be connected.
"Room influence" must be set to a value between 1 and 99.
There should be no thermostatic radiator valves in the reference room (mounting
location of room temperature sensor) (if such valves are present, they must be
set to their fully open position).
User manual RVS43.345
The settings in detail
Operating line
Heating curve slope
Heating curve displacement
Heating curve adaption
Raises the flow temperature, especially when outside
temperatures are low.
Lowers the flow temperature, especially when outside
temperatures are low.
CE1U2354en_021
2013-09-02