Vaillant geoTHERM Installation Instructions Manual page 95

Parameters
Temp. fault detection after
Next service due
Aux heater on at
9.10 Parameters which can only be set with vrDIALOG
Installation instructions geoTHERM 0020051574_04
Adapting the appliance to the heating system
Description
Temp. fault detection
If the setpoint for the flow temperature of a heating
circuit is not reached after the preset time, a corre-
sponding error message appears in the display and
the error is stored in the error list (display of the last
ten errors).
This function can be switched on or off.
Acceleration mode
With Next service due ON, the time steps for the inte-
gral energy balance are changed from 1 min. to 1 sec.
and the energy balancing is thereby accelerated by a
factor of 60. The minimum run time of 4 min. and the
minimum off time of 5 min of the compressor are not
changed.
Aux heater on at
This value is only relevant for the direct heating
mode and when an external auxiliary heating system
has been enabled for the heating mode. It specifies
the value of the energy integral below which the aux-
iliary heating system to the compressor is connected.
This value is relative to the energy integral start
value for the compressor, i.e. for standard values, the
switch-on threshold for the auxiliary heating system
is:
-120 °min. - 600 °min. = -720 °min.
The auxiliary heating system is switched off if the
flow target temperature at VF2 is exceeded by 3 K.
9
Factory setting
OFF
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