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ELETTROPOMPE

The connection to the power grid must be done in the respect of the national standards of the electric system of the country where the pump is installed.

Verify that the pump’s flow rate and head correspond to the required characteristics.
Before connecting the pipes to the relative openings, make sure that the rotating part of the pump turns freely and is not hindered. In case of problems
please contact our technical assistance servicing.

MG1 series of pumps: the useful output power provided by the engine must be above the power absorbed by the pump.

ATTACH THE PUMP/ELECTROPUMP TO THE GROUND

The electric pumps can be positioned with horizontal, sloping or vertical axis always with the motor upwards. The operatine characteristics of the catalogue and
label are to be understood for continuous service and with clear water (specific weight = 1000 kg/m3) with a max manometric suction height of approximately 1,5
m. For higher manometric heights and up to a max of approximately 6-7 m., the characteristics decrease in the various delivery data.

The pump/electropump must be installed as close as possible to the suction point of the liquid.

Make sure that the pump’s support surface is solid and even (so that it rests on all the feet) and that the load capacity of the surface is adequate for the
weight shown on the plate. Verify that the surrounding area is sufficient for ventilation and allows movement in the case of maintenance.
Check that the strength of the concrete foundations is appropriate and complies with current relevant regulations.
The pumps must be fixed through the pump body support and, if there, of the motor.

CONNECTING THE PIPES

The NPSH value available in the lifting system must always be greater than the NPSH value of the electropump in order to avoid cavitation.

The intake and delivery pipes must not transmit forces to the pumps/electropumps due to their own weight and/or heat expansion, at the risk of possible
liquid leaks or breaking the pump. For this reason, the pipes must be supported by anchorages and expansion joints must be inserted in the appropriate
positions.

- The intake pipe must always be perfectly air tight and not positioned horizontally, but must always rise towards the pump (fig. 3a). On the other hand, in the case
of operation under water head, the intake pipe must always slope down towards the pump (fig. 3b). For this reason, any fitting cones 1 must be eccentric and oriented
as shown in the figure to avoid the formation of bubbles during priming or operation.
- It is a good idea to protect the pump by inserting a filter on the intake pipe; especially during the initial period of operation, the pipes release slags capable of
damaging the pump seals. The filter must have a mesh less than 2 mm and a free passage area of at least 3 times the section area of the pipe so as to avoid
excessive losses of head.
- To adjust the flow rate, it is a good idea to install a shutter on the delivery pipe.

Install a non-return valve on the delivery pipe

- To achieve the good operation of the pump, we recommend mounting a foot valve.
The diameter of the pipe must be such that the speed of the liquid never exceeds 1,5 - 2 m/s at intake and 3 – 3,5 m/s at the delivery. In any case, the diameter of
the pipe must not be less than the diameter of the pump openings. The suction piping must be absolutely hermetic and for the catalogue data it must have the
following minimum diameters (pipes of smaller diameters reduce the delivery values):

By way of example, observe the following typical installations:
fig. 4a pump with autoclave
fig. 4b pump for transfer and runoff
fig. 4c pump for a sprinkler irrigation plant
fig. 4d pump with intake under water head
(1 Pump / 2 Non-return valve / 3 Shutter /4 Autoclave / 5 Foot valve / 6 Transfer tank / 7 Sprinkler irrigation plant / 8 Feed tank / 9 Manometer)

Electrical connection

Before executing any operation, turn off the power and prevent it from being reconnected.

The electropumps are not provided with an electrical panel. The user is responsible for realizing and installing it.

The connection to the power grid must be done in the respect of the national standards of the electric system of the country where the pump is installed.

For three-phase pumps and for pumps without integrated protection device: use a thermal protection device adjusted on a maximum absorbed current not higher
than 5% the current stated in the label and with an operating time lower than 30 seconds.

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