Adapting the appliance to the heating system
Installation instructions geoTHERM 0020051574_04
81
9
Display shown
Description
Factory setting
Auxiliary heater
C7
Aux on peak rate
>NO
Aux on during CH
no CH
Aux on during DHW
no CH
Aux heater on at
-600° min
>Select
¯
Aux on peak rate:
If you set wiring diagram 2, this
menu item also appears in the top line. If you
set “YES”, auxiliary heating operation is enabled
during the aux. on peak rate.
i
This setting has precedence over the set-
tings for “Aux on during CH” and “Aux on
during DHW”. The set auxiliary heating
permanently ensures the heating up of the
heating water and hot water up to the set
target values.
If the internal additional electric heating
has been hydraulically integrated as auxil-
iary heating (factory setting), this may
lead to high energy costs. (Not applicable
for VWS/VWW ..0/2)
NO
Auxiliary heater
C7
Hysteresis aux. heating.
5 K
>Select
Auxiliary heating hysteresis:
Forced switching on of the auxiliary heating if:
Actual flow temperature < target flow tempera-
ture minus hysteresis
Forced switching off of the auxiliary heating if:
Actual flow temperature > target flow tempera-
ture plus hysteresis
After 15 minutes, compressor mode applies for
all system hydraulics. The amount of time until
the auxiliary heating can start can be read from
Menu D3.
5 K
Cooling
C8
Flow temperature
22 °C
Cooling Hours
>Select
Only if external passive cooling is installed,
VWS only:
Flow temperature:
Display of target flow tempera-
ture. The value can be changed.
b
Caution:
Risk of damage caused by fall in
temperature below thawing point
and formation of condensation.
Adequate cooling is guaranteed even
at a cooling mode flow temperature of
20 °C.
>
Do not set the cooling mode flow
temperature too low.
Cooling Hours:
Brine pump operating hours in cooling
mode.
20°C
9.6. Menu C: Set parameters for the heating system
