ENGLISH
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8 - ELECTRICAL CONNECTION
Warning: always observe the safety regulations!
Rigorously respect the electrical diagrams that appear inside the junction box and those
that appear in this manual.
8.1- Electrical connections must be carried out by an expert electrician with the necessary
requirements established by current regulations. The requisites of the electricity company must be
respected.
In the case of three-phase motors with a star-triangle start, it must be ensured that the switching time
between the start and the triangle is as short as possible.
8.2-
Before accessing the terminal box to make the pump work, make sure the power supply is turned off.
8.3-
Check the mains voltage before making any connection. If it corresponds to that on the plate, connect the
wires to the terminal plate giving priority to the ground wire.
8.4- Make sure the ground installation is in a correct state and that a suitable connection can be
carried out.
8.5-
The pumps must always be connected to an exterior switch.
8.6-
Motors must be protected with adequate motors suitably calibrated in relation to the current on the plate.
9- PLACEMENT IN SERVICE
9.1- Before starting up the pump, make sure that:
- The pump is correctly purged, and that the body of the pump is completely full of water. The reason is
that the pump should begin to work correctly without air, and that the seal device (mechanical seal)
should be totally hermetic. Dry operation causes irreparable damage to the mechanical seal and the rest
of the pump.
- All moving parts are armoured with the safety systems;
- The electrical connection has been carried out as above.
10- START-UP
10.1-
In the event of suction on loading:
- Completely open the door valve in the uptake, while keeping the drive valve almost closed, allowing the pump
body to fill completely, and open the purge stopper located on the rear of the drive body until all of the air has
been removed from the installation.
manual V-nox 2010_A5 21/12/10 11:00 Página 15
