Danfoss – 9
VUBMF102
2 .5
Regulation information
Heat production - calculating
The indoor temperature is adjusted by changing the heat pump’s heat curve, which is the
control computer’s tool for calculating what the supply temperature should be for water that
is sent out in the heating system. The supply temperature is calculated from the outdoor tem-
perature and two adjustable values: CURVE and ROOM. 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 exponentially as the outside 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.
CURVE
The control computer shows the value for CURVE by means of a graph in the display. You can
set the heat curve by adjusting the CURVE value. The CURVE value indicated which supply
temperature the heating system is to have at an outdoor temperature of 0°C.
Figure 4: Graph showing the set value 40 for CURVE .
At outdoor temperatures colder than 0°C, supply water hotter than 40°C is sent out to the
heating system and at outdoor temperatures greater than 0°C, supply water cooler than 40°C
is sent out.
Value for CURVE is 40...
Outdoor temperature
Supply temperature
...at zero degrees
Maximum supply
temperature
Summary of Contents for DHP-AL
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