Operating instructions

E-13
English
Energy-efficient Operation 7.1
7.1.1 Setting examples
A heat distribution system (e.g. underfloor heating) is
dimensioned for a maximum flow temperature at a particular
standard external temperature. This is dependent on the location
of the heat pump and, in Germany, lies between -12 and -18 °C.
The max. return temperature that is set on the heating controller
must be entered for an external temperature of -20 °C. This is
done by entering the maximum return temperature for the given
standard external temperature in Fig. 7.2 on p. 13. The setting at
-20 °C can be read using the curves.
NOTE
Step 1:
Adjust the heating curve to suit the respective building and local
conditions by setting the gradient (heating curve end point).
Step 2:
Set the desired temperature level via a parallel shift of the heating curve
upwards or downwards (indicator bar).
Fig. 7.2: Heating curves to calculate the max. return set temperature
Underfloor heating
35 °C/28 °C
Radiators
55 °C/45 °C
Standard external air temperature in °C
-12 -14 -16 -12 -14 -16
Required flow temperature
(at standard design temperature)
35 °C 35 °C 35 °C 55 °C 55 °C 55 °C
Temperature spread flow/return-flow
7°C 7°C 7°C 10°C 10°C 10°C
Required return temperature
(at standard design temperature)
28 °C 28 °C 28 °C 45 °C 45 °C 45 °C
Setting for end point
of heating curve
30 °C 29 °C 29 °C 48 °C 47 °C 46 °C
Example 1 Example 2
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