Compressor Performance At Max. Outside Temperature - Viessmann VITOTRONIC 200 Service Instructions Manual

Parameter group Internal hydraulics
730F Compressor performance at min. outside...
Note
Set "Compressor performance at min. outside tem-
perature 730F" higher than "Compressor perform-
ance at max. outside temperature 7310".

7310 Compressor performance at max. outside temperature

On heat pumps using compressors with output-
dependent control: Default compressor output.
In the starting phase, the compressor is regulated to a
constant output, in order to improve the control charac-
teristics of the output controller.
This output can be specified separately for minimum
and maximum outside temperature. Output values for
temperatures between these are calculated using lin-
ear interpolation.
7319 Cycle rate heating circuit pumps
In cyclical mode, the following circulation pumps start
and stop cyclically. This reduces the energy consump-
tion compared to constant operation.
All heating circuit pumps in heating systems with
■
buffer cylinder
■ Secondary pump in heating systems without buffer
cylinder
Cycling is only active if the outside temperature is
above 10 °C.
–
A B A
C
D
Fig. 58
A Circulation pump ON
Circulation pump OFF
B
ON duration for 1 cycle
C
Cycle time
D
7340 Operating mode secondary pump
Switching the secondary pump and type of speed con-
trol
230
!
t
(cont.)
Setting in %
Note
Set "Compressor performance at min. outside tem-
perature 730F" higher than "Compressor perform-
ance at max. outside temperature 7310".
Setting in %
The set value determines the number of cycles at
10 °C over a 24 h period. As the outside temperature
falls, the heat pump control unit increases the cycling
rate subject to the linear outside temperature. Below
10 °C the circulation pump is constantly running.
–
Note
At setting "0" cyclical mode is switched off.
Setting in %
!
!