Construction And Function; Installation - oventrop Regusol Installation And Operating Instructions For The Specialised Installer

5 Construction and function

5.1 Summary and functional description
Installed in the return pipe of the solar circuit, the
solar station is designed for the connection of the
storage cylinder and the collector.
The return line of the solar station features a ball valve
with integrated check valve, to prevent gravity
circulation when the pump is switched off. The safety
group featuring a safety valve, a draining ball valve
and a connection for an expansion tank is connected
to the lateral coupling of the ball valve.
The circulation pump installed in the return line is
especially suitable for use in solar circuits.
The flow measuring and regulating device/VFD sensor
allows a fine setting of the volume flow. In general,
the required volume flow depends on the number of
collectors or the equipment of the solar plant.
The flow measuring and regulating device/VFD sensor
can be shut off completely. The solar pump can be
replaced after isolation of the flow measuring and
regulating device/VFD sensor and the pump ball valve.
In comparison with the pump circuit, the transmission
station features an integrated supply line with addi -
ti o nal isolating ball valve with check valve.
Thermometers are included in the handles of the ball
valves.
The transmission station with deaerator is equipped
with a vent pot for the deaeration of the heat transfer
medium.
5.2 Markings
• CE marking on the pump:
CE marking
• Markings on the body:
OV Oventrop

6 Installation

The pipework has to be flushed thoroughly before
installation of the solar station.
NOTICE
The solar station has to be installed vertically
(flow direction of the pump "upwards" to
the collector)
This installation position provides a good
optical display of the thermometers, pressure
gauge and flow measuring and regulating
device.
The functions of the mechanical flow
measuring and regulating device, deaerator
and the safety valve are only guaranteed
when vertically installed
Observe warning advice under paragraph 2
(safety notes)
18
CAUTION
• Do not use any greasing agents or oils
for the installation, as these can destroy
the seals. Any dirt particles or grease or
oil residues must be flushed out before
the solar station is installed.
• When choosing the operating fluid, the
latest technical status has to be
considered (e.g. VDI 2035).
• Do not use any solvents for flushing the
system, as these can cause damage to
plastic parts, such as pump impellers.
• Please protect against external forces
(e.g. impacts, vibrations etc.).
After installation, check all installation points for
leaks.
NOTICE
The difference in density between cold and
hot heat transfer liquid entails a gravity
circulation in the solar circuit
In exceptional cases, check valves can be
opened by strong self-circulation.
Gravity circulation is minimised by installing
a siphon-like pipe loop (see illustr. 6.1) near
the storage cylinder
Alternatively, the installation of an additional
electric isolation device which is activated
parallel to the pump and only opens under
working conditions is recommended.
Siphon
Illustr. 6.1 System illustration