Vaillant geoTHERM Installation Instructions Manual page 94

9 Adapting the appliance to the heating system
Parameters
Max. heating time
Max. DHW load time
Compressor hyster.
Compressor starts
Max. CH return temp.
Perm. temperature spread
Brine pump pre-run
9.10 Parameters which can only be set with vrDIALOG
94
Description
20 min Max. heating time = Maximum time after which the
40 min
Max. DHW load time = Time after which the opera-
Compressor hyster.:
Forced switch-on of the compressor when:
Current flow temperature < Setpoint flow temperature
- Hysteresis
Forced switch-off of the compressor when:
Current flow temperature > Setpoint flow temperature
+ Hysteresis
Compressor starts/h: Maximum possible number of
46 °C Max. CH return temp.: Setting the limit of the return
This function is intended to avoid unnecessary, short-
time compressor operation.
Perm. temperature spread: Max. permissible differ-
If 20 K has been set, the function is deactivated.
Brine pump pre-run: Time period by which the brine
operation mode switches back to cylinder charg-
ing mode when there is still a parallel demand
present for DHW.
tion mode switches from cylinder charging
mode to heating mode when a parallel demand
for heating is present.
compressor starts per hr (3 - 5).
temperature for compressor operation.
ence between brine inlet and outlet tempera-
ture. An error message appears and the com-
pressor switches off if it is exceeded.
pump switches on before the compressor.
Installation instructions geoTHERM 0020051574_04
Factory setting
20 min.
40 min.
7 K
3
46 °C
20 K
1 min.