IVT Greenline HC 22 - Heat Curve Hysteresis and Time Factor; Heat Curve Hysteresis and Time Factor Settings

Settings
6 720 645 504 (2011/04) en
61
B Turn the menu dial to change the value.
Fig. 49
B Press the dial to save or use to return without
saving.
B Use to leave the curve setting window and return
to the menu.
B If Yes at Use temperature from circuit with highest
temperature set the heat curve for Circuit 1 to a low
value, i.e. 22 °C.
Fig. 50
> Heat curve hysteresis heat pump x
>> Maximum
B Set how big the maximum hysteresis for the flow
temperature can be.
>> Minimum
B Set how big the minimum hysteresis for the flow
temperature can be.
>> Time factor
B Select how long the compressor should be on or off
in heating mode.
Higher set values result in fewer compressor starts
and stops, which achieves higher economy. However,
more pronounced temperature fluctuations in the
heating system may result than with lower values.
Example
With the factory settings, hysteresis is changed, as
follows:
When the flow falls below the set point value with half
the hysteresis, there is heating demand and when it
exceeds the set point value with half the hysteresis, the
heating demand is met.
Recommendations:
B Increase the value of the right point if it
feels too cold at low outdoor
temperatures.
B Increase the value of curve at 0 °C if it
feels a little cold at outdoor temperatures
around 0.
B Increase or decrease the value of the
curve equally at the right and left points
to fine adjust the heat (the curve is offset
parallel).
6 720 614 789-22.3I
6 720 617 644-08.1I
Factory setting 16.0K
Lowest value The value in Minimum
Highest value 30.0K
Tab. 55 Maximum hysteresis
Factory setting 4.0K
Lowest value 2.0K
Highest value The value in Maximum
Tab. 56 Minimum hysteresis
Factory setting 20.0
Lowest value 1.0
Highest value 30.0
Tab. 57 Time factor
Time Hysteresis
At start/stop for
heating demand
16K
2 min 14K
5 min 12K
10 min 10K
14 min 9K
20 min 8K
Tab. 58 Hysteresis