en - Original instructions
e-SV series - Installation, Operation and Maintenance Manual 29
2. Invert two of the three wires of the power cable in the terminal box of the motor or in the
control electric panel.
3. Connect the power supply.
4. Start the pump unit.
5. Check the direction of rotation through the coupling protection, or through the motor
cover.
6. Stop the pump unit.
5.4 Start-up
NOTICE:
It is prohibited to operate the unit with the discharge side on-off valve closed or at zero flow
rate: this can cause the liquid to overheat and damage the unit.
NOTICE:
If there is a risk of the unit running at a flow rate below the minimum expected, install a
bypass circuit.
NOTICE:
Check that the shaft can turn smoothly.
1. Check that all the operations in the Filling, Priming and Checking the direction of rotation
(three-phase motors) sections have been carried out properly.
2. Shut off the discharge on-off valve almost completely.
3. Fully open the suction on-off valve.
4. Start the unit.
5. Gradually open the discharge on-off valve until half open.
6. Wait a few minutes and then fully open the discharge on-off valve.
After the start-up procedure, with the pump unit in operation, check that:
No liquid is leaking from the unit or pipes
The maximum pressure of the unit at the discharge, determined by the available suction
pressure, must not exceed the maximum pressure (PN)
The current absorbed is within the rated limits (calibrate the thermal overload protection of
the motor)
There is no unwanted noise or vibrations
At zero flow rate, the pressure at the discharge corresponds to the expected nominal
pressure
No vortexes can occur at the end of the suction pipe, at the point of the foot check valve
(suction lift installation).
NOTICE:
If the units does not deliver the required pressure, repeat the operations in Filling and Priming.
WARNING:
After startup, run the unit for a few minutes with several users open in order to wash the inside
of the system.
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