Important Parameters; Heat Production - Calculating; Curve - Danfoss DHP-A Service Instructions Manual

9

Important parameters

9.1

Heat production - calculating

The indoor temperature is adjusted by changing the heat pump's heat curve, which is the control system's tool for
calculating what the supply temperature should be for water that is sent out in the heating system. The heat curve
calculates the supply temperature depending on the outdoor temperature. The lower the outdoor temperature,
the higher the supply temperature. In other words, the supply temperature of the water fed to the heating system
will increase linearly as the outdoor air temperature falls.
The heat curve will be adjusted in connection with installation. It must be adapted later on, however, to obtain a
pleasant indoor temperature in any weather conditions. A correctly set heat curve reduces maintenance and saves
energy.
9.2

CURVE

The control computer shows the value for CURVE by means of a graph in the display. The heat curve can be
changed by adjusting the CURVE value. The CURVE value indicates the supply temperature of the water that is
wanted to the heating system at an outdoor temperature of 0°C.
1
5 6
5
4 0
2 4
Figure 22. Graph showing the set value 40 for CURVE.
Position
1
2
3
4
5
28 – Service instructions VMGFC302
2 0 0
4
Description
Temperature (°C)
Maximum setpoint value
Outdoor temperature (°C)
0°C
Set value (standard 40°C).
2
3
-2 0