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5.2 Adjusting the indoor temperature
The indoor temperature is adjusted by changing the heat curve, which is the control system’s tool for calculat-
ing the heating demand, the integral value. The integral value is determined by comparing the actual tempera-
ture of the heating system's supply line with the calculated value, the setpoint value. The heating requirement
is calculated from the current outdoor temperature and heat curve setting.
The heat curve will be adjusted in connection with installation. It may be adapted later on, however, to obtain a
pleasant indoor temperature in any weather conditions. A correctly set heat curve reduces maintenance and
gives energy efficient operation.
There are two ways of adjusting the heat curve, partly in the HEATING sub-menu, partly with the ROOM value.
Adjusting CURVE
A typical heat curve is shown below. When the outdoor temperature is 0°C the heat pump control tries to make
the temperature in the supply line 40°C. At hotter or colder outdoor temperatures than 0°C the set point that
the control regulates against is lowered or raised respectively. When you increase the CURVE value, the heat
curve will become steeper and when you decrease the CURVE value, the heat curve will become flatter. This is
the most energy and cost efficient way to set the indoor temperature and should therefore be used for long
term temperature settings.
4
2 0 0 -2 0
2 4
4 0
5 6 2
3
1
5
1. Supply temperature (°C)
2. Maximum setpoint value
3. Outdoor temperature (°C)
4. 0°C
5. Set value (standard 40°C)
The following parameters can be adjusted in the HEATING menu:
Parameter Description
CURVE If the CURVE value is increased, the heat curve will become steeper and if the value is de-
creased, it will become flatter. Raise or lower as necessary to obtain as even indoor tempera-
ture as possible.
MIN Lowest set point for supply temperature.
MAX Highest set point 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 high-
er than, the set heat stop value. (Default value is 17°C)
User Guide iTec Eco
Thermia AB AWIE01UG102
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