Adjusting The Indoor Temperature - Danfoss DHP-A User Manual

User Guide
5.2

Adjusting the indoor temperature

The indoor temperature is adjusted by changing the heat pump's heat curve. This curve is the control system's
tool for calculating the correct supply temperature of water for the heating system. The heat curve is a graph
that compares the outdoor temperature with the supply temperature. A colder outdoor temperature results in
more heat being supplied to the heating system. The heat curve will be adjusted during installation. It must be
adapted later on, however, to obtain a pleasant indoor temperature in any weather condition. A correctly set
heat curve reduces maintenance and saves energy.
There are two ways of adjusting the heat curve. Using the HEAT CURVE sub-menu or by using the ROOM value.
A typical heat curve is shown below. At an outdoor temperature of 0°C the supply temperature should be 40°C.
At outdoor temperatures colder than 0°C, supply water hotter than 40°C is sent out to the radiators. At outdoor
temperatures greater than 0°C, supply water cooler than 40°C is sent out. When the CURVE value is increased,
the heat curve will become steeper and when the value is reduced, it will become flatter.
This is the most energy-efficient and cost-efficient way to set the indoor temperature; it should therefore be
used for long-term temperature settings.
1
5 6
5
4 0
2 4
2 0
The following parameters can be adjusted:
Parameter Description
CURVE If the CURVE value is increased, the heat curve will become steeper; if the value is reduced, it will
become flatter. Raise to increase indoor temperatures, reduce to lower indoor temperatures.
MIN Lowest setpoint for supply temperature.
MAX Highest setpoint for supply temperature.
CURVE 5 Used to adjust the heat curve at an outdoor temperature of +5°C.
CURVE 0 Used to adjust the heat curve at an outdoor temperature of 0°C.
CURVE -5 Used to adjust the heat curve at an outdoor temperature of -5°C
HEAT STOP This function stops all production of heat when the outdoor temperature is equal to, or higher
than, the heat stop value currently set.
Danfoss Heating Solutions
Domestic heat pumps
2
3
0 -2 0
4
1 Supply temperature (°C)
2 Maximum setpoint value
3 Outdoor temperature (°C)
4 0°C
5 Set value (standard 40°C)
VUGFE102
15