Energy-Efficient Operation; Setting A Heating Curve On The Basis Of The External Temperature - Dimplex WPM 2006 plus Instructions De Montage Et De Service

7

7 Energy-Efficient Operation

If heating operation is carried out on the basis of the external
temperature, the heating controller calculates a return set
temperature from the set heating characteristic curve and the
current external temperature.
The heating curve should be set to the maximum calculated
return temperature of the heating system. By using the buttons
Hotter (⇑) and Colder (⇓), the heating curve can be shifted
upwards or downwards in parallel according to customer
requirements to attain the actually desired room temperatures.
Regulation via return temperature
Regulating a heat pump heating system via the return
temperature offers the following advantages:

7.1 Setting a Heating Curve on the Basis of the External Temperature

The heating curve must be adjusted - separately for heating
circuit 1 and 2 / 3 - to suit the respective building and local
conditions so that the desired room temperature is also attained
when the external temperatures vary. If the external temperature
rises, the return set temperature is lowered, thus ensuring
energy-efficient operation of the heating system.
Make selections in the menu "Settings – Heating circuit 1/2/3
– Control by – External temperature". The desired heating
curve can be set in the following menu item "Heating curve –
End point".
1) In the menu "Settings- Heating curve end point", enter the
maximum required return temperature at an external
temperature of –20 °C. The aim is to attain an average
constant room temperature
temperatures vary.
Fig. 7.1: Setting options for the heating curve
EN-22
even if the external
1) Long runtimes for the heat pump with all of the circulated
heating volume heated according to need.
2) Measuring of disturbance variables in the heating system
(e.g. passive solar gain).
3) A reduction in the temperature spread at a constant return
temperature results in lower flow temperatures and thus in
more efficient operation.
NOTE
The heating curve should be set as high as necessary and as low as
possible!
2) All heating characteristic curves intersect at an external
temperature of +20 °C and a return temperature of +20 °C.
This means that at this operating point no more heat output
is required. The indicator bar (buttons Hotter ⇑ and Colder ⇓)
can be used to shift the operating point between 5 °C and
30 °C along the axis marked by a slope. This shifts the entire
heating curve by a constant amount of 1 K per indicator bar
unit upwards or downwards in parallel. The user can make
this setting according to his/her individual temperature
requirements.
3) Each heating curve is limited in an upward direction by the
value set in "Settings – Heating circuit 1/2/3 – Heating curve
maximum". In a downward direction, each heating curve is
limited by the value 15 °C (air HP) or 18 °C (brine or water
HP).