Fujitsu WSYA050ML3 Design & Technical Manual page 74

• Heating curve
All time programs can be reset to factory settings. Each time program has its own programing line
for this reset action. In this case, individual settings will be lost.
HC1
720
721
– Heating curve slope
Based on the heating characteristic, the controller computes the flow temperature setpoint which
will be used for controlling the flow temperature in consideration of atmospheric conditions. Dif-
ferent setting can be used to adapt the heating characteristic so that the heating capacity, and
therefore the room temperature, will match the individual needs. The colder outdoor tempera-
ture, the greater extent to which the slope will modify the flow temperature. In order words, the
slope should be corrected if the room temperature shows a difference when the outdoor temper-
ature is low, but not when it is high.
• Increase the setting:
The flow temperature is increased mainly when the outdoor temperatures are low.
• Decrease the setting:
The flow temperature is lowered mainly when the outdoor temperatures are low.
WARNING
The heating curve is adjusted in relation to a room temperature setpoint of 20°C. If the room
temperature setpoint is modified, the flow temperature setpoint is automatically recomputed.
This will not modify the setting and amounts to automatically adapting the curve.
70
60
50
40
30
20
20.0
– Heating curve displacement
The curve displacement (offset) modifies the flow temperature in general and even manner over
the full range of outdoor temperature. In other words, the displacement should be corrected
when the room temperature is generally too high or too low.
3-4. Heating circuit 1 and 2 functions
Line
HC2
1020 Heating curve slope
1021 Heating curve displacement
15.0 10.0
Outodoor temperature (°C)
Function
Heating curves
2
1.75
1.5
1.25
1
5.0 0.0 -5.0
- (03-16) -
0.75
0.5
0.25
-10.0 -15.0
3. Function table
-20.0