21
Installation instructions geoTHERM VWS/VWW 0020051574_01
When using ground water as a heat source, the quality
of the water must be investigated before installation. To
this end, a water sample must be examined in the labo-
ratory and, using the aids provided by Vaillant for as-
sessing ground water quality (tables, calculation soft-
ware), a decision made as to whether the ground water
can be used as a heat source. In the event of poor
ground water quality, it may be necessary to use a
VWS heat pump with a customer-side intermediate heat
exchanger (for more details, see Vaillant PLI geoTHERM,
No. 877959).
• Install the heat source pipes and all their associated
components.
• Provide all the pipes with vapour-proof thermal insula-
tion. The accessory kit contains the insulating mat
provided for the thermal insulation of the connection
plate.
4.11
Fitting the VRC DCF outside temperature
sensor
Fit the sensor in accordance with the enclosed installa-
tion instructions.
4.12
Installing the VR 80/VR 90 remote control
unit
If you install several heating circuits, you can connect a
separate VR 80 or VR 90 remote control unit for each
of the first eight circuits. It allows the operating mode
and target room temperature to be set, and takes into
account the actual room temperature measured by the
built-in room sensor, if necessary.
It is also possible to adjust the parameters for the asso-
ciated heating circuit (timer programme, heating curve
etc.) and to select the special functions (party, etc.).
In addition, it is possible to query the heating circuit and
to display service and fault messages.
For assembly of the VR 80 or VR 90 remote control
unit, see the corresponding installation manual provid-
ed. Regarding installation see Chap. 6.8.1.
4.13
Installing the VR 60 mixer module
With the mixer module, you can expand the control sys-
tem of the heating installation by two mixer circuits.
You can connect a maximum of six mixer modules.
A unique bus address is set on the mixer module by
means of a rotary switch. The setting of the heating
programme and all the required parameters is carried
out from the operating console. All heating circuit con-
nections (sensors and pumps) are made directly on the
mixer module using a ProE plug.
For assembly of the VR 60 mixer module, see its en-
closed installation instructions. For installation informa-
tion, see Chap. 6.8.22.
5
Filling the heating and heat source
systems
The heating circuit and the brine circuit (VWS only)
must be filled before the heat pump can be put into op-
eration.
5.1
Filling the heating circuit
• Open all the thermostatic valves in the heating sys-
tem.
• Connect a filling hose to a water tap.
• Attach the free end of the filling hose to the filling
valve (see Fig. 2.6, Pos.
5
).
• Open the filling valve.
• Turn the water tap on slowly and fill with water until
the pressure gauge indicates a system pressure of ap-
prox. 1.5 bar.
• Close the filling valve and detach the hose.
• Bleed the system again at the points provided.
• Re-check the water pressure in the system (repeat the
filling process if necessary).
Assembly and installation 4
Filling the heating and heat source systems 5
