en
If you require a high level alarm (warning that the liquid level inside the basin is too high), you have to in-
stall an additional float switch and an audible or visual alarm. The float switch is normally electromecha-
nical type (see chapter 5.5). The related electric cord can be threaded through the seal on the cover,
alongside the pump’s power cord, or you can use one of the blind holes in the upper section of the basin
and one of the cable glands provided with the lifting station. Secure the float switch to a side wall of the
basin using one of the fastening brackets provided with the lifting station. It must be secured at a higher
point compared to the floats that control the pumps. Make sure that the seal is correctly positioned on
the outside to prevent spills from the basin. Adjust the cord, initially, so that the length that is free to
swing, including the float, is no longer than 260 millimeters. Later, when the unit is started for the first
time, the length of the cord can be adjusted based on the actual requirements of the system. An audible
or visual alarm with very low voltage can be connected to the Lowara control panel.
For further information, refer to chapter 12.
6.3 Initial start-up
At this stage, the on-off valve installed on the inlet pipe can remain closed. Fill the lifting station with clean
water. Open the on-off valve installed on the outlet pipe (connection to the public / private sewer) and
make sure that the pipes have a perfect seal and the pumps are operating properly.
The flow of liquid from the different users must not hinder the correct operation of the floats instal-
led in the basin.
Now you can open the on-off valve in the inlet pipe.
6.4 Checking the direction of rotation of the motor
The rotation direction for the single-phase electric pumps is pre-established. For the three-phase
pumps, you should check the direction of rotation during the first work cycle. After the hydraulic and elec-
trical connections have been set up, open the on-off valve installed on the pipe connecting to the sewer.
Fill the lifting station partially until the pump starts up. Wrong direction of rotation may be signalled by
the following conditions: the pump vibrates excessively or generates too much noise or is unable to drain
the basin in a short time.
In this case, disconnect the panel from the power supply and exchange two leads in the pump’s power
cord.
6.5 Product description
Directions for users
The SINGLEBOX and DOUBLEBOX lifting stations are composed of one or two electric pumps, one or
more floats and an electric panel (optional). This unit, after being installed and once the hydraulic and
electrical connections have been set up, is used to collect the effluent from bathrooms and other users
and convey it to the public / private sewer.
This lifting station is needed whenever the wastewater collection point is located at a lower level than the
public / private sewer to which it must be connected, so that the effluent cannot be conveyed to the
sewer system simply by gravity.
6.5.1 Operation
When the liquid inside the basin reaches the level corresponding to the closing of the contact in the
pump’s float switch, the pump starts up and gradually drains the basin. The pump is switched off when
the liquid drops to the minimum level corresponding to the opening of the contact in the float switch.
For systems with two pumps, the float switches are positioned so that the second pump is switched on
after the first one, but only if the latter is unable to deliver to the sewer the same volume of liquid that is
flowing in from the different users.
The system may be equipped with an additional float which is installed at a higher point compared to the
other float switches in the pumping station. This float is used to warn that the level of the liquid in the
basin is too high. In this case a command and control panel is also required.
For further information, refer to chapter 12.
Before using the equipment, read the manuals and store in a safe place.
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