Terminology - Viessmann VITOTRONIC SPS Operating Instructions Manual

Appendix
Menu overview
(cont.)
Langs.
Lang.

Terminology

Application limits
The application limits define the temperature range in
which the compressor/system can be operated safely
and without any faults.
Power-OFF
At times of high electricity demand, your power supply
utility can send a signal which disables the heat pump.
While the heat pump remains disabled, "Power-OFF"
is displayed under "Operating info".
Once the power supply utility re-enables the heat
pump, it continues with the selected operating pro-
gram.
Heating curve/cooling curve
The heating/cooling characteristics of your heat pump
are affected by the selected heating curve/cooling
curve.
Cooling curve
15.0 °C
13.0 °C
10.0 °C
5.0 °C
5.0 °C
-8.0 °C
Fig. 2 Example
Set temperatures, cooling, day
A
Minimum set temperature (with very high outside
B
temperature)
Maximum set temperature (with very low outside
C
temperature)
32
0.0 °C 10.0 °C
Heating and cooling curves represent the relationship
between the outside temperature, room temperature
(set room temperature) and (heating circuit) flow tem-
perature.
■ Heating curve:
The lower the outside temperature, the higher the
flow temperature in the heating circuit.
■ Cooling curve:
The higher the outside temperature, the lower the
flow temperature in the cooling circuit.
In order to guarantee sufficient heat at any outside
temperature, the conditions of your building and your
heating system must be taken into consideration. For
this, you can adjust the heating curve.
You can also adjust the cooling curve for cooling
mode.
17.0 °C
25.0 °C
15.0 °C
12.0 °C
7.0 °C
20.0 °C
Set temperatures, cooling, night
D
Outside temperatures
E