IVT Optima 1000 Assembly, Commissioning And Maintenance Manual page 17

Fine-tune the heat cur ve
The heat curve can also be fi ne-tuned. Fine-tuning means that you offset
the heat curve in parallel. Fine-tuning is done from the menu display Temp.
fi ne-tune. The diagram for fi ne-tuning shows how the dashed line has been
offset upwards in parallel. This means the heating has been fi ne-tuned in a
positive direction and the heat pump will be instructed to maintain a higher
temperature on the return, which also gives a higher temperature on the
water to the radiators.
Return temperature (ºC)
In warm weather (above +5
If you are not satisfi ed with the indoor temperature when it is warmer than
+5ºC outdoors, you should offset the curve in the menu Temp. fi ne-tune.
This is what to do:
1. Press the Heat button in the initial menu.
2. Turn the menu dial clockwise until you reach the menu Temp. fine-
tune.
Temp. Þ ne-tune
-10° 0,0° 10°
Return Adjust
3. Press the Adjust button.
4. Turn the menu dial clockwise to increase the heating and anti-clockwise
to lower it.
(Adjust in small increments, 0.5-1.0 units (degrees) is usually enough.)
5. Save the new value by pressing the Save button.
By using the menu dial on the control panel
the selected curve has been moved up so the
heat pump produces more heat.
Outdoor temperature (ºC)
O C):
17
Basic functions (Customer level 1)