Checking The Direction Of Rotation (For Three-Phase Motors); Electrical Connections - Espa Viginox Serie Manual De Instrucciones

WARNING! The pump should not be run dry! It should be put fully into the liquid to be pumped.
Slurping for long periods should be avoided.
The length of the power cable on the electropump limits the maximum depth of immersion at
which the pump may be used.

8 ELECTRICAL CONNECTIONS

CAUTION! ALWAYS FOLLOW THE SAFETY REGULATIONS!
8.1 The electrical installation must be carried out by an authorized and competent elec-
trician who assumes all the responsibilities.
8.2. Ensure that the mains voltage is the same as shown on the plate of the motor to be fed
and be sure TO MAKE A GOOD GROUND CONNECTION.
8.3. The electropump, both the single-phase and the three-phase version is supplied with an
electric cable. If the power cable is damaged in any way it must be replaced, not repaired.
• It is advisable to connect the pump to a dedicated power line.
• Upstream from the pump, fit a suitably sensitive magnetothermal differential switch.
• Switch off the power upstream from the system before making the electrical connection.
• Single-phase motors are provided with built-in thermal overload protection and may be co-
nected directly to the mains.
Warning: If the motor is overloaded it stops automatically. Once it has cooled down it
starts again automatically without requiring any manual intervention.
•Three-phase pumps must be protected with motor protectors suitably calibrated
according to the values on the data plate of the pump to be installed.
•Connect the pump cable to the electric panel, ensuring that the following parts
correspond:
SINGLE PHASE
Yellow-green
Brown LI
Blue N
• Before making a test start, check the water level inside the well.
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8.4 CHECKING THE DIRECTION OF ROTATION (for three-phase motors)

Viginox
Fig. 2
CAUTION! ALWAYS FOLLOW THE SAFETY REGULATIONS
The direction of rotation must be checked each time a new installation is carried out.
Proceed as follows:
1. Place the pump on a flat surface;
2. Start the pump and stop it immediately;
3. Carefully observe the kick-back on starting, looking at the pump from above. If the direction of rota-
tion is correct, the upper cap will turn counter-clockwise as indicated by the arrows in the drawing
(Fig. 2).
If it is not possible to check as described above because the pump is already installed, check as
follows:
1. Start the pump and observe the water flow rate.
2. Stop the pump, switch off the power and invert two phases on the supply line.
3. Restart the pump and check the water flow rate again.
4. Stop the pump.
The correct direction of rotation is the one that gives the higher flow rate.
9 START-UP
9.1•Turn the differential magnetothermal switch upstream from the pump to position I (ON)
and wait until the water comes out of the delivery pipe.
• If malfunctions are found, disconnect the pump from the power supply, turning the differential
magnetothermal switch to position 0 (OFF) and consult the chapter 13 on "TROUBLESHOOTING".
• The pump may be started and stopped:
- Manually by means of the differential magnetothermal switch upstream from the system.
- Automatically when water level rises, for versions with a float switch.
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