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Assembly and installation 4
Filling the heating and heat source systems 5
4.13
Fitting the VRC DCF outside temperature
sensor
Fit the sensor in accordance with the enclosed installation 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 associated 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 system 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 connections (sensors and pumps) are made directly on the
mixer module using a ProE plug.
For assembly of the VR 60 mixer module, see its enclosed installation instructions. Regarding installation see
Chapter 6.8.2.
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
Note!
The heat pump cladding sections are
only fitted after the filling and subsequent bleeding of the heating circuit.
Filling the heating circuit
a
Caution!
Malfunction!
Fill the heating circuit via the integrated
filling and draining valve, so that the heating circuit is completely bled.
If there is a DHW cylinder connected,
make sure that the 3-way valve is in the
centre position.
• 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 system.
• 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 approx. 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 recommend 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 region to region. Please find out about this from the authorities responsible.
Only the following brine media are authorised by Vaillant for operation of the heat pump:
– max. 30 % ethylene glycol/water
– max. 33 % propylene glycol/water
– potassium carbonate/water
– max. 60 % ethanol/water
Installation instructions geoTHERM VWS 0020046310_01
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