Design Of The Heat Pump - Vaillant geoTHERM VWS Installation Instructions Manual

These different temperatures are produced in the coo-
lant 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. The coolant then
flows through the condenser, where it releases its heat
to the heating water by means of condensation. It flows
as a liquid to the expansion valve, where it expands sig-
nificantly and in so doing loses much of its pressure and
temperature. This temperature is now lower than the
brine/water flowing through the evaporator. The coo-
lant can thus take up more heat in the evaporator, tur-
ning into vapour in the process and flowing to the com-
pressor. The cycle starts again.
If required, the electric auxiliary heating can be swit-
ched 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. If condensate forms, this
collects in a pan (see Fig. 2.6, Item 11) and is led away
under the unit. Drop formation under the unit is thus
possible.
2.3

Design of the heat pump

The Vaillant geoTHERM heat pump is available in the
following models. The heat pump are, above all, diffe-
rent from each other in their output.
Type name
Brine water heat pumps (S0/W35)
VWS 61/2 230 V
VWS 81/2 230 V
VWS 101/2 230 V
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.
Installation instructions geoTHERM VWS 0020046310_01
Heating output (kW)
6.0
8,1
10.5
Description of the appliance 2
1
2
3
Fig. 2.4 Front view
Key to Fig. 2.4
1 Label with heat pump type designation
2 Operating panel
3 vrnetDIALOG mounting plate (behind the pillar cladding)
7