Vaillant geoTHERM exclusive, Руководство по установке

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Installation instructions for geoTHERM exclusive VWS 0020051614_00
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4.6 Requirements of the heating circuit
a
Caution!
Danger of falling below the dew point and
condensate formation!
All the pipes of the heating circuit must
be insulated leak-proof against vapour
diffusion.
Radiator heatings are not suitable for
the operation with a Vaillant heat pump
geoTHERM exclusive.
a
Caution!
Danger of falling below the dew point and
condensate formation!
The heating flow temperature must not
be set too low in the cooling mode. Ade-
quate cooling function is also guaranteed
in a flowtemperature of 20 °C.
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.
4.7 Requirements for the domestic hot water
cylinder
4.7.1 Cold water pipe pressure
The performance of unvented domestic hot water cylin-
der depends on the available water pipe pressure and
the percolation rate. In order to attain the optimal
power of the integrated domestic hot water cylinder of
the geoTHERM heat pump, an appropriate cold water
pipe must be available, i.e. the measured static line
pressure must be at least 2.0 bar. A corresponding flow
rate of at least 20 - 25 l/min should be available.
h
Note!
The mains water pressure is reduced
during periods of high water consump-
tion. Make sure that the measurements
are carried out this time.
Example:
The available percolation rate of mixed water of 40 °C
is 25 l/ min (15 l/min hot water of 60 °C from the do-
mestic hot water cylinder with 10 l/min cold water of
10 °C) if the measured static cold water line pressure is
2 bar and the available percolation rate is 30 l/min.
The domestic hot water cylinder operates satisfactorily
as well during a water line pressure below 2 bar, but at
a reduced percolation rate. The unvented domestic hot
water cylinder should not be installed if the water line
pressure is below 1 bar. You can obtain information on
alternative hot water supply systems from Vaillant Ltd.
To keep the friction losses at a minimum, a minimum di-
ameter of 22 mm is recommended for the cold water
pipe in the building; however, a satisfactory power can
still be obtained with a 15 mm line.
4 Assembly and installation