en – Translation of the Original Instructions
32 e-SV series – Additional Installation, Operation and Maintenance Instructions
5.3.1 Wrong rotation direction
1. Disconnect the power supply.
2. Invert two of the three wires of the power supply cord.
5.4 Start-up
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
NOTICE:
Check that the shaft can turn smoothly.
1. Check that all the operations indicated in Filling - Priming on page 30 and in Rotation sense
check (three-phase motors) on page 31 have been completed correctly.
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 - 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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