Installation instructions geoTHERM VWS/VWW 0020051574_01
70
Parameters
Description
Factory setting
Minimum flow temp.
Maximum flow temp.
Minimum/Maximum temperature:
Setting the limiting temperatures (min. and max.) that the
heating circuit can request.
Together with the maximum temperature, the value for
the floor protection switching is also calculated (max. HK
temp. + Compr. hyst 2K).
15°C
43 °C
Pre-loading time
Pre-loading time:
To take account of the inertia of the underfloor heating,
you can manually set a pre-heat before the start of the
programmed heating time.
0 hrs.
Max. heating time
20 min.
Max DHW loading time 40 min.
Max. heating time
= Maximum time after which the oper-
ation mode switches back to DHW loading mode when
there is still a parallel demand present for DHW.
Max. DHW load time:
= Maximum time after which the
operation mode switches back to heating mode, when
there is a parallel demand for heating.
20 min
40 mins
Compressor hyster.
Compressor hysteresis: (only for hydraulic plans 1 and 3)
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 tempe
Hysteresis
7K
Compressor starts/h
Comp. starts/h: Maximum of allowable compressor starts
per hour. (3-5).
3
Max. CH return temp. HK
46 °C
Max. CH return temp. HK: Sets the return temperature
limits for compressor operation. This function should pre-
vent unnecessary short-term operation of the compres-
sor.
46 °C
Delta T. T3-T7
Delta T. T3-T7
: Max. permissible difference between the
heat source inlet and outlet temperatures. An error mes-
sage appears and the compressor switches off if it is ex-
ceeded.
The function is deactivated if 20K is set.
20K
Brine pump pre-run
Brine pump pre-run:
Interval by which the brine pump
switches on ahead of the compressor.
1 min
Temperature fault detection after
Temp. fault detection:
If the setpoint for the flow tem-
perature of a heating circuit is not reached after the pre-
set time, a corresponding 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.
Off
Next service due
Quick test. With
"Next service due"
ON, the time inter-
vals for the energy balance integral are changed from 1
minute to 1 second and the energy balancing is thus accel-
erated by a factor of 60. The minimum run time of 4 min-
utes and the minimum off time of 5 minutes for the com-
pressor are unchanged.
—
Table 8.7 Parameters that can be set with vrDIALOG 810/2
(cont.)
8 Controller
