Auxiliary Connections; Electrical Connections - SAER Elettropompe L Serie Manual De Empleo Y Mantenimiento

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For installations with support base:
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WARNING!
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CONNECTING THE PIPES
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WARNING!
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The suction inlet must be preceded by a straight section of pipe of length at least two times the diameter of the inlet itself.
The intake pipe must always be perfectly air tight and not positioned horizontally, but must always rise towards the pump in case of
suction operation. On the other hand, in the case of operation under water head, the intake pipe must always slope down towards the
pump. For this reason, any fitting cones 1 must be eccentric and oriented to avoid the formation of bubbles during priming or operation.
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WARNING!
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To adjust the flow rate, it is a good idea to install a shutter on the delivery pipe.
For over head installation, install a foot valve.
In any case, the diameter of the pipe must not be less than the diameter of the pump openings.
hermetic.
After having performed the controls listed, connect the pipelines to the pump.

AUXILIARY CONNECTIONS

WARNING!
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ELECTRICAL CONNECTIONS

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CHECKS ON THE ELECTRICAL SYSTEM
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Keep the manual for future reference - For more informations visit www.saerelettropompe.com
If you pump toxic or harmful liquids or at high temperatures, it is important to taken all necessary
precautions to avoid any loss and/or leakage that could cause damage to persons, animals, property or to
he environment.
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.
Check that the strength of the concrete foundations is appropriate and complies with current relevant
regulations.
The pump maximum working pressure can't be bigger than the PN pump nominal pressure.
Pipes must be suitable for the pump maximum working pressure.
Le tubazioni non devono trasmettere alla pompa sforzi superiori a quelli ammessi
The intake and delivery pipes must not transmit forces to the pumps/ electric pump 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, if necessary, expansion joints must be inserted in the appropriate
positions.
Pumps don't have to transmit vibrations to the pipes, therefore insert anti-vibration couplings both in suction
and delivery.
Install non return valve on the discharge side.
Install gate valve both in suction and discharge side.
In the first period of use the pipes release slags capable of damaging the seals of the pump: We recommend
cleaning of pipes, fittings, valves and so on before connecting the pump.
If necessary, insert a filter on the suction line: The filter must have a mesh less than 2 mm and a free
passage area of at least 3 times the area of the pipe section, in order to avoid excessive losses.
Verify the presence and proper installation of the necessary auxiliary connections.
The connection to the power grid must be done in the respect of the local and national standards of the
electric system of the place where the pump is installed.
Furthermore, respect the connection diagrams supplied with the motor and with the control panel.
Perform the earth connection before all the other connections.
Verify the correct operation of the electric equipment (control panel etc...).
Verify that the electrical system corresponds to the IEC 60204-1 standard and to the local and national
standards.
Verify:
- the existence of an earth connection,
- the presence of an omni-polar switch disconnector that can disconnect all the feeding cables to
insulate the motor in case of malfunction or small maintenance operations (the disconnection
device from the supply mains must be over-voltage III category)
- the presence of an emergency stop button.
- The presence of a residual current device (RCD) with rated residual operating current not exceeding
0,03 A.
- the presence of 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.
The feeding cable must have adequate section in order to avoid a voltage drop greater than 3 % of the
nominal voltage and to operate within the rated temperature.
The suction piping must be absolutely
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