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9. FIRST START-UP
Before starting up the electropump check that in the tank system there is no residue or other
material that could harm the correct operation of the system.
In this phase you can leave the interception valve in the inlet pipe closed and fill the lifting station with clean
water. Open the interception valve in the delivery pipe and check that the pipes are tightened and perfectly
sealed and that the electropump is working correctly. Check also that the electropump is primed. Open the
interception valve in the inlet pipe and check that the station is working correctly.
The flow of liquid coming from the various utilities must not prevent the correct operation of the
floats present in the container.
In the case of a three-phase electropump, check that the impeller is turning in the correct direction. Check
also the electropump manual. Check that the levels of float intervention are correct, and if necessary adjust
them to suit the actual needs of the system. When there are two electropumps, the floats must be adjusted
so that the second pump starts after the first and only if the first is not able to send to the sewer duct as
much liquid as arrives from the various utilities. Check that the electropump cannot become unprimed during
operation. Check that the number of starts per hour is compatible with the characteristics of the system
components. Check that the system is working correctly and put it into service. Close the cover or covers of
the station, screwing them into place. If necessary, fix the cover in its seat in such a way as to prevent
unauthorised opening of the cover (see chapter 5.7).
9.1 Operating flow rate
It must be guaranteed that the speed of the liquid in the delivery pipe is at least 0.7 m/s and lower than 2.3
m/s.
9.2 Operation
When the liquid in the tank reaches the level corresponding to the closure of the float contact that commands
the electropump, the pump starts and gradually empties the container. The electropump stops when the
liquid reaches the minimum level corresponding to the opening of the float contact. When there are two
electropumps, the floats must be adjusted so that the second pump starts after the first and only if the first is
not able to send to the sewer duct as much liquid as arrives from the various utilities. There may be a float
placed higher than the others in the pumping station, its function is to indicated the presence of an
abnormally high level of the liquid in the tank.
10. MAINTENANCE
After starting up the plant, it is advisable to inspect and clean it, especially the no return valve, about every
three months. This interval may be increased after the first inspections have given a favourable outcome.
Clean the pump accurately, removing any foreign bodies stuck in the intake grille and check that the float
moves freely. If necessary, remove the pump from the tank.
It is recommended to clean the system at least once a year with running water, operating the pump
repeatedly.
