7
Installation instructions geoTHERM VWS/VWW 0020051574_01
These different temperatures are produced in the cool-
ant circuit by means of a compressor (
2
) and an expan-
sion valve (
4
), which are situated between the evapora-
tor and the condenser. The coolant flows in vapour form
from the evaporator into the compressor, where it is
compressed. This causes the pressure and temperature
of the coolant vapour to rise sharply. After this process
it flows through the condenser, where it releases its
heat to the heating water by condensation. It flows as a
liquid to the expansion valve, where it expands signifi-
cantly and in so doing loses much of its pressure and
temperature. This temperature is now lower than that
of the brine which flows through the evaporator. The
coolant can thus take up more heat in the evaporator,
turning into vapour in the process and flowing to the
compressor. The cycle starts again.
If required, the electric auxiliary heating can be
switched in by means of the integrated controller.
To prevent the formation of condensate in the interior
of the unit, the pipes of the heat source circuit and the
coolant circuit are insulated. Should condensate appear,
however, it is collected in a basin inside the unit (see
Fig. 2.7) and fed away underneath it. Drop formation
under the unit is thus possible.
2.3
Design of the heat pump
The Vaillant geoTHERM heat pump is available in the
versions listed below. The heat pump are, above all, dif-
ferent from each other in their output.
Type name
Heating output (kW)
Brine/Water Heat Pumps (B0/W35)
VWS 220/2
21,6
VWS 300/2
29,9
VWS 380/2
38,3
VWS 460/2
45,9
Water-to-water heat pumps (W10/W35)
VWW 220/2
29,9
VWW 300/2
41,6
VWW 380/2
52,6
VWW 460/2
63,6
Table 2.2 Type summary
You can read the type designation of the heat pump
from the sticker (see Fig. 2.4, Item
1
) on the pillar frame.
The heat pump is designed to implement all current
electrical supply tariffs.
2
3
1
4
Fig. 2.4 Front view VWS/VWW
Key to Fig. 2.4
1 Label with heat pump type designation
2 Operating
panel
3 vrnetDIALOG mounting plate (behind the pillar cladding)
4 Serial
number
Description of the appliance 2
