Xylem MIDIBOX SINGLEBOX PLUS DOUBLEBOX PLUS - Manual (Page 21)

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When there are 2 electric pumps, the float switches are adjusted so that the second pump starts after the first and only if the latter is
unable to send as much liquid to the sewer duct as the amount arriving from the various users.
During operation, make sure the electric pump cannot be unprimed. Make sure that the number of hourly start-ups is compatible
with the characteristics of the system components.
Check the system operates correctly and put it into service.
Close the cover or covers of the station, screwing them into place. If necessary, secure the cover to prevent unauthorised opening.
6.2.1 6.2.1 6.2.1 6.2.1 Operating capacity Operating capacity Operating capacity Operating capacity
Check that the speed of the liquid in the outlet piping is at least 0.7 m/s and less than 2.3 m/s.
6.3 6.3 6.3 6.3 Operation Operation Operation Operation
When the liquid in the tank reaches the level at which the contact of the float switch commanding the electric pump closes, the
pump starts and progressively drains the basin. The pump stops when the liquid reaches the minimum level and opens the float
switch contact.
When there are 2 electric pumps, the second pump starts after the first and only if the latter is unable to send as much liquid to the
sewer duct as the amount arriving from the various users.
There may be a float switch located above the other ones in the pumping station. This is used to signal the presence of an excessive
liquid level in the tank.
7. Maintenance, service and spare parts Maintenance, service and spare parts Maintenance, service and spare parts Maintenance, service and spare parts Information for maintenance personnel Information for maintenance personnel Information for maintenance personnel Information for maintenance personnel
Observe the following directions when performing maintenance on the product.
Before proceeding with any maintenance operations, make sure that all the connections (even those that are
potential-free) are voltage-free.
Maintenance operations may only be performed by skilled and qualified people.
Use suitable equipment and protective devices. Observe all accident prevention regulations. Lift and handle
the stations and electric pumps with care using suitable lifting equipment.
Read the operating instructions of the electric pump and of the electric panel, where applicable.
Always refer to current local and/or national regulations, laws and standards.
7.1 7.1 7.1 7.1 Routine maintenance Routine maintenance Routine maintenance Routine maintenance
Periodically check the internal status of the basin. To do this, unscrew the cover and remove it. Clean the basin at least once a year,
especially around the areas where the float switches are located.
7.2 7.2 7.2 7.2 Extraordinar Extraordinar Extraordinar Extraordinary maintenance y maintenance y maintenance y maintenance
In the lifting stations featuring PVC pipe fittings, the electric pump can be removed by unscrewing the ring nut located under the
cover of the station.
In lifting stations fitted with a descent device, remove the electric pump with the handle to which a rope or chain must be attached.
Do not use the electric power cable or float switch to lift and move the electric pump.
7.3 7.3 7.3 7.3 Spare parts Spare parts Spare parts Spare parts
Always specify the identification number of the lifting station and the relative code when requesting
technical information or spare parts from our Sales and Service Department.
Only use spare parts to replace any components. The use of unsuitable spare parts may cause malfunctions,
damage and injury.
WARNING