EN
Version 1.0 / 2023-06 5 / 52
In the case of being installed a fibre housing, whether buried or half-buried, sufficient air flow should be guaranteed
to generate correct ventilation that prevents the maximum interior temperature from exceeding 40ºC.
7.2 Assembling the Piping
We recommend the installation of cut-off valves in both pump suction and impulsion so that the pump may
be removed from the installation without having to empty the whole circuit first.
The suction piping should be at least the same diameter as the pump connection, and it is also recommended that
the impulsion piping should also be the same diameter as the pump connection.
The suction piping should be assembled with a slight inclination towards the pump to prevent air pockets forming
inside.
It is very important that both the suction and impulsion piping are independently supported and correctly fixed in
place so that the pump does not have to support their weight, nor the vibration produced by the water flow through
them. In a situation where a long length of impulsion piping is used, we recommend the installation of a check valve
to prevent the water hammer produced by the return of the water causing any damage when the pump stops.
If flexible piping is employed, it should be the non-compressible type.
When making the connections to the pump, totally clean connections should always be used, with the thread in
perfect conditions and leak-tightness should be obtained only using Teflon tape, (glues or similar products should
not be employed). These connections should be slowly tightened, with special care not to strip the internal thread
of the pump by over-tightening.
8 ELECTRICAL CONNECTION
Before carrying out any maintenance on the electrical part of the motor, it should be disconnected from
the electricity supply.
System protection should be based on a differential breaker (Ifn = 30 mA). A GOOD EARTH CONNECTION MUST
BE MADE WHENEVER POSSIBLE. The earth terminal must be connected to the yellow/green conductor of the
supply cable. An earth conductor that is longer than the phase conductors must also be used to prevent it from
being the first to disconnect if pulled.
All our single-phase motors incorporate thermal protection that will disconnect the pump if the motor temperature
increases due to an overload and will then connect the electricity supply again once the temperature has dropped
to within normal levels again.
For three-phase versions, the user should provide appropriate protection in accordance with current regulations.
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