8
water solutions
EN
BoxPRO – Translation of original instructions
control devices and to connect the control panel to the main power
supply line.
Installers are also urged to inspect the terrain to ensure that the correct
type of concrete is chosen for filling.
Check the concrete specifications ANNEXED.
10.Preparation
Generally, the pipelines and valves are pre-installed in the lifting sta-
tion.
In some cases, depending on the delivery method, some parts of the
system might be packed separately and placed inside the tank.
In this case, remove all packs from the inside before starting installa-
tion.
11. Pit
The pit inside which the lifting station is to be installed must be large
enough to allow it to be positioned easily and connected to the draina-
ge system without difficulty.
When deciding how deep to dig the pit, bear in mind that a concrete
plinth at least 300 mm thick will be laid underneath the lifting station,
and that the bottom of the tank must be at least 1 metre below the
lowest point of the intake pipeline
(FIG. 5)
.
12. Positioning
Before placing the lifting station inside the pit, open the holes for pas-
sage of the intake pipeline and wiring duct.
This must be done using a core drill. Jig saws or similar tools should
to be used as they might damage the shape of the connection, leading
to leaks.
Then proceed as follows:
•
Pour concrete into the bottom of the pit and level it with a suitable
tool to create the supporting plinth for the lifting station (at least 300
mm thick);
•
Wait for the plinth to set (at least 24 hours);
•
Lower the lifting station into the pit and position it on the concrete
plinth;
•
Check that the lifting station is perfectly level and that the intake and
outlet connections are in line with their respective pipelines;
•
Build formwork around the lifting station for construction of the con-
crete wall 200-250 mm from the outside wall of the tank;
•
Connect the intake pipeline to its connection using a piece of piping
long enough to reach through the formwork (at least 300 mm);
(FIG.
6)
•
Connect the Ø110 mm electrical wiring ducts to the fittings in the top
of the tank. The ducts must also pass through the formwork. If the
wiring ducts are difficult to fit, alternative pathways can be created
by making a hole in the neck of the tank. The alternative ducts must
be correctly sealed at the point where they join the wall of the tank
to prevent leaks.
•
Check again that the lifting station is vertical and the pipelines cor-
rectly connected.
•
At this point, pour water into the tank (about 600 mm) to hold the
system stable.
•
Then pour the concrete into the framework to a level about 500 mm
above the plinth.
•
Next add more water to the tank, proceeding in alternation so that
the level of the water is always above that of the concrete
(FIG. 7)
.
•
Wait at least 1 hour between successive layers of concrete to allow
each layer to set sufficiently. Longer setting times may be necessary
depending on weather conditions.
•
The concrete walls must be 200-250 mm thick and the concrete
must be compacted carefully to prevent the formation of air pockets.
Do not allow the needle vibrator to come into the contact with the
sides of the tank for long, to avoid damage to the structure.
warning
!
An air content of 10% inside the concrete may reduce its maxi-
mum strength by as much as 50%.
It is important to make sure that the pit remains dry during installation
and that the concrete walls have set correctly (normally 7 days).
If aquifers are present, a pump must be used to keep the pit dry.
13. Lifting and handling the pump(s)
NEVER handle or lift the pump by the power supply or float
switch cables.
Models weighing 25 kg or less can be lifted and moved around by
hand, using the handle on the top.
For models weighing more than 25 kg and in all cases where the cor-
rect, natural posture cannot be maintained, the unit must be lifted and
handled by means of a rope or chain fixed to the handle on the top of
the pump, with suitable machinery.
14. Installing the pump(s)
The lifting station is equipped with a bottom coupling device which
allows the pump to be connected to the drainage system quickly and
brought easily back to the surface without having to move the tank.
•
Fix the sliding flange to the pump’s outlet port with the screws pro-
vided;
•
Connect a rope or chain of suitable size to the handle on the top of
the pump;
•
Lower the pump into the tank, sliding the flange connected to the
outlet port along the guide pipes until it mates with the bottom cou-
pler
(FIG. 8)
;
•
Hang the free end of the lifting rope or chain on the hook provided.
15. Checking the impeller rotation direction
(three-phase models only)
Before making the definitive electrical connection to three-phase mo-
dels, make sure the impeller rotation direction is correct.
The pump carries a sticker, shown in FIG. 9, which indicates the cor-
rect impeller rotation direction (green arrow) and the relative kickback
direction (red arrow).
Proceed as follows:
•
place the pump on dry, level ground, laying it flat on one side; if
necessary, use wooden wedges to hold it in place.
•
temporarily connect the yellow-green wire to the system ground
connector and then connect the power supply wires to the contactor;
•
make sure there are no people or objects within a distance of at
least 1 metre of the pump;
•
turn on the start switch for a few moments;
•
watch the impeller as it stops through the intake port or strainer, and
check that it turns anticlockwise.
•
If the pump has feet or an intake strainer impeding the view of the
impeller, proceed as follows:
•
place the pump vertical on dry, level ground;
•
secure the pump by tying a suitably sized chain or rope to the handle
on the top to prevent it from falling over after the kickback.
•
temporarily connect the yellow-green wire to the system ground
connector and then connect the power supply wires to the system;
•
make sure there are no people or objects within a distance of at
least 1 metre of the pump;
•
turn on the start switch for a few moments;
•
check that the impeller turns anticlockwise by making sure that the
kickback is in the direction of the red arrow shown on the label affi-
xed to the pump.
If the pump is rotating in the wrong direction, invert two of the three
power supply wires in the contactor and try again, repeating the ope-
rations described.
Once the connection which provides the correct rotation direction has
been obtained, MARK the precise order in which the wires have been
connected to the system, REMOVE the temporary electrical connec-
tions and install the pump in the planned position.
Make the definitive electrical connection, connecting the yellow-green
wire to the ground first, followed by the other wires.
16. Top access hole cover
Lifting stations require a cover for the access hole at the top, which
must be chosen as appropriate to the type of load expected.
Covers may be suitable for either pedestrian or vehicle traffic.
The cover is fitted complete with the relative frame.
Before starting installation, make sure that the frame and cover match
correctly and that once closed the cover will rest securely on every
point of the frame.
warning
!
The frame must be totally supported by the concrete platform that
