Vaillant geoTHERM VWS Series, Installation Instructions Manual

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Installation instructions geoTHERM VWS/VWW 0020057444_01
4.6 Requirements of the heating circuit
The heat pump is only suitable for connection to a
closed central heating installation. To ensure trouble-
free operation, the central heating installation must
have been installed by authorised specialists in compli-
ance with the applicable regulations.
A heat pump is suited to low temperature heating sys-
tems. The system must therefore be designed for low
flow temperatures (ideally around 30 to 35 °C). Further-
more, it must be ensured that power company outages
are bridged over.
EN 12828 requires the following the heating system in-
stallation:
– a filling valve, in order to fill the heating system with
water or be able to drain the water,
– a diaphragm expansion vessel in the return line of the
heating circuit,
– an overpressure safety valve (opening pressure 3 bar)
with pressure gauge (safety group) in the flow line of
the heating circuit, immediately after the appliance,
– an air/dirt separator in the return line of the heating
circuit.
To avoid energy losses in accordance with the Energy
Saving Order (EnEV) and to protect against freezing, all
connection lines must be provided with thermal insula-
tion.
The pipes must be dirt free - if necessary, flush them
thoroughly before filling.
a
Caution!
Risk of damage!
Do not add any antifreeze or corrosion
protection agents to the heating water,
as seals and other components can be
damaged as a result and this can lead to
water leaks.
In hydraulic installations that are predominantly
equipped with thermostatically or electrically controlled
valves, it is necessary to ensure a constant, adequate
flow through the heat pump. Regardless of the choice of
heating system, the nominal flow rate of heating water
must be ensured. This is guaranteed by a professionally
installed buffer cylinder.
4.7 Scope of delivery
3
2
1
6
5
4
7
8
12
9
13
14
10
11
Fig. 4.4 Checking the supplied material
For key, see Table 4.2.
The heat pump is delivered on a pallet in two packing
units.
• Check the heat pump and the separately packaged op-
erating console for any transport damage.
Assembly and installation 4