Vaillant geoTHERM VWS, Operating Manual

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Operating Manual geoTHERM VWS/VWW 0020051578_01
Floor protection circuit for all hydraulics without
buffer cylinder (e.g. in hydraulic plans 1 and 3)
If the measured flow temperature in the underfloor
heating circuit continuously exceeds a specific value for
more than 15 minutes, the heat pump switches off and
issues the error message 72. When the heating flow
temperature falls below this value again and the error
has been reset the heat pump switches back on.
a
Caution!
Danger of damage to the floor.
Set the value for the floor protection
circuit ensuring that it is not high
enough to damage the floor as a result
of excessively high temperatures.
Phase monitoring
The sequence and existence of phases (clockwise rotat-
ing field) on the 400 V voltage supply are continuously
monitored during commissioning and operation. If the
sequence is not correct or if a phase breaks down, the
heat pump is switched off due to the error to avoid
damage to the compressor.
Freezing protection function
The outlet temperature of the heat source is constantly
measured. If the heat source outlet temperature falls
below a specific value, the compressor temporarily
shuts off with the error message 20 or 21. If these er-
rors occur three times in a row there is a fault-induced
shutdown.
For the geoTHERM VWS heat pumps you can set the
value (Default setting -10 °C) for the freezing protection
in the installation assistant A4.
For the geoTHERM VWW heat pumps a default value of
+4 °C is set. This value cannot be changed.
3.4 Design of the heat pump
The types of heat pump available are listed below. The
heat pumps are, above all, different from each other in
their output.
Type name Heating output (kW)
Brine-to-water heat pumps (B0/W35)
1)
VWS 220/2 21.6
VWS 300/2 29.9
VWS 380/2 38.3
VWS 460/2 45.9
Water-water heat pumps (W10/W35)
2)
VWW 220/2 29.9
VWW 300/2 41.6
VWW 380/2 52.6
VWW 460/2 63.6
Table 3.1 Type summary
1)
Thermal heating output with a brine temperature of 0 °C and
heating flow temperature of 35 °C
2)
Thermal heating output with a water temperature of 10 °C and
heating flow temperature of 35 °C
2
1
3
Fig. 3.3 Front view VWS/VWW
Key to Fig. 3.3
1 Label with heat pump type designation
2 Operating
panel
3 Serial number
Equipment and functional description 3
GB