Danfoss DHP-AX User Manual page 12

3.4.3 ROOM
If you wish to increase or reduce the indoor temperature, change the ROOM value.
The difference between changing the ROOM value and the CURVE value is that
the system's heat curve does not become steeper or flatter if the ROOM value is
changed, which the curve becomes if the CURVE value changes, instead the entire
heat curve is moved by 3°C for every degree change of the ROOM value. The reason
that the curve is adjusted 3°C is that an approximate 3°C increase in supply tem-
perature is usually needed to increase the indoor temperature 1°C.
Supply temperature
Figure 6: Changing the ROOM value changes the heat curve upwards or downwards.
The relationship of the supply temperature to outdoor temperature will not be
affected. The supply temperature will be increased or reduced by the same number
of degrees all along the heat curve. I.E. the entire heat curve rises or drops instead
of the curve gradient changing.
This method of adjusting the indoor temperatures can be used for a temporary raise
or drop. For long term increases or reductions of the indoor temperature, the heat
curve is adjusted instead.
DHP-AX – 12 VUBMI102
Maximum supply tem-
perature
Outdoor temperature