Fitting The Vrc Dcf Outside Temperature Sensor; Fitting The Vr 90 Remote Control Unit; Installing The Vr 60 Mixer Module; Filling The Heating And Heat Source Systems 5 - Vaillant geoTHERM VWS Installation Instructions Manual

4.13 Fitting the VRC DCF outside temperature
sensor
Fit the sensor in accordance with the enclosed installati-
on manual.
4.14

Fitting the VR 90 remote control unit

If you install several heating circuits, you can connect a
separate VR 90 remote control unit for each of the first
six 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 90 remote control unit, see its
enclosed installation instructions. Regarding installation
see Chapter 6.8.1.
4.15

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 enc-
losed installation instructions. Regarding installation see
Chapter 6.8.2.
Installation instructions geoTHERM VWS 0020046310_01

Filling the heating and heat source systems 5

5 Filling the heating and heat source
systems
The heating circuit and the brine circuit must be filled
before the heat pump can be put into operation.
h
5.1

Filling the heating circuit

a
• If there is a DHW cylinder connected, set the 3-way
valve (see Fig. 2.6, Item 16) to the centre position.
• 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, Item 8).
• 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).
5.2

Filling the brine circuit

The brine fluid consists of water mixed with a heat
transfer fluid concentrate. As an additive we recom-
mend propylene glycol (alternative: ethylene glycol)
with corrosion-inhibiting additives. A DN 40 collector
hose has a capacity of approx. 1 litre per continuous
metre.
The brine fluids that may be used differ greatly from re-
gion to region. Please find out about this from the aut-
horities responsible.
Only the following brine media are authorised by Vail-
lant for operation of the heat pump:
– max. 30 % ethylene glycol/water
– max. 33 % propylene glycol/water
– potassium carbonate/water
– max. 60 % ethanol/water
Assembly and installation 4
Note!
The heat pump cladding sections are
only fitted after the filling and subse-
quent bleeding of the heating circuit.
Caution!
Malfunction!
Fill the heating circuit via the integrated
filling and draining valve, so that the he-
ating circuit is completely bled.
If there is a DHW cylinder connected,
make sure that the 3-way valve is in the
centre position.
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