Hydraulic Connections - Tallas D-ECONCEPT Instrucciones De Instalación Y Mantenimiento

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Earth connection must be ensured.
The system cannot support the weight of the piping which must therefore be provided with other kind of
support.
It is always good practice to position the system as close as possible to the liquid to be pumped.
The system must be operated only when positioned horizontally and resting stably on its rubber feet.
In case of fixed installation, make sure the position selected ensures access and visibility to the command and control
panel (6-Fig.1).l
In case of fixed installation, make sure sufficient space is provided to allow for routine maintenance of the built-in filter
(Sect. 9.2).
In case of fixed installation, fit an On/Off valve on the suction side as well as the delivery side. This makes it possible to
easily close the line upline and/or downline of the system for any maintenance and cleaning or for shutdown periods.
In case of fixed installation, the use of an expansion tank is recommended, to be connected on the delivery piping, so as to
make the system elastic and protect it from water hammer. The capacity of the expansion tank is not binding (1 litre is
sufficient), the recommended precharge is 1 bar less than the set point.
If the water is particularly loaded with foreign bodies and the number of cleaning operations on the built-in filter is to be
reduced, install an additional external filter at the system infeed to stop the impurities.
The installation of a filter on intake causes a decrease of the system's hydraulic performance proportional
to the loss of load caused by the filter itself (generally the greater the filtering power, the greater the fall in
performance).
2.1

Hydraulic connections

The system ensures the declared performances only if piping with diameter not less than those of the openings of the
system (1") are used at the inlet and outlet.
With reference to its position with respect to the water to be pumped, the installation of the system may be defined
"above head" or "below head". In particular the installation is defined "above head" when the pump is placed at a level
higher than the water to be pumped (e.g. pump on the surface and water in a well); vice versa it is "below head" when
the pump is placed at a level lower than the water to be pumped (e.g. overhead cistern and pump below).
If the installation is of the "over head" type, install the suction pipe from the water source to the pump in such a way as to
avoid the formation of goosenecks or siphons. Do not place the suction pipe above the pump level (to avoid the
formation of air bubbles in the suction pipe). The suction pipe must draw at its entrance at a depth of at least 30cm below
the water level and must be watertight along its whole length, as far as the entrance to the electropump. For suction
depths of over four metres or with long horizontal stretches it is advisable to use an intake hose with a diameter larger
than that of the intake aperture of the pump. If the suction pipe is made of rubber or flexible material, always check that it
is of the reinforced vacuum-resistant type to avoid shrinkage due to suction.
If the installation is of the "positive suction head" type, avoid "goosenecks" and siphons in the suction piping and make
sure it is water-tight.
The suction and delivery ducts must be connected to the system by means of the threads provided: 1 inch male thread
on swivel connector made of technopolymer.
When making the connection airtight by adding material (e.g. Teflon, hemp,...) make sure you avoid
excessive use of the gasket. under the action of a suitable tightening torque (e.g. long-handle pipe
wrench), the excess material may exert abnormal forces on the technopolymer connector, damaging it
permanently.
The swivel connectors make it easier to install the system.
2.2 Loading Operation
Installation above head and below head
Installation "above head" (par. 2.1): remove the Filler cap (3-Fig.1) by unscrewing it manually or using the tool provided,
also remove the breather cap (5-Fig.1) using a screwdriver or the tool provided; then fill the system with clean water
through the filler port (approx. 1 liter). As soon as the water starts flowing through the bleeding port, carefully screw the
cap back on, top up further through the filler port and screw the filler cap back on until it comes to a mechanical stop. It is
recommended to fit the non-return valve at the end of the suction pipe (foot valve) so as to be able to fill it quickly too
during the loading operation. In this case the quantity of water necessary for the loading operation will depend on the
length of the suction pipe
Installation "below head" (par. 2.1.): if there are no check valves between the water deposit and the system (or if they are
open), it loads automatically as soon as it is allowed to let out the trapped air. Then slacken the breather cap (5-fig.1)
enough to release the trapped air; this allows the system to get filled completely. Supervise the operation and close the
bleeding port as soon as the water flows out (it is advisable to provide an On/Off valve in the suction piping section and
use it to control the filling operation with the cap open). Alternatively, if an On/Off valve is present on the suction piping,
the filling operation can be carried out in a manner similar to that described for the suction lift installation.
ENGLISH
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