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Wet installation on floor support ring
Affix the floor support ring (available as an accessory) with
screws to the suction branch of the pump. Attach 90° con-
nection angle or arc to the pump's discharge nozzle; install
discharge line. Gate valves and swing check valves must
be fitted according to the local regulations, if appropriate.
The discharge line must be fitted free of tension; when
using a hose, ensure that the installation is kink-free.
Fix the pump on the handhold with a rope or chain and
lower down into the medium. In the event of muddy
ground, lay stones (or sim.) under the pump to prevent
sinking.
Wet installation with automatic coupling system
The following instructions are for the installation of the
original HOMA coupling system:
•
Determine the approximate position of the coupling
foot and the upper pipe bracket for the guide pipe;
use a plumb bob if necessary.
•
Check correct installation dimensions of the pump(s)
(see dimensional drawings in the annex).
•
Bore mounting holes for the pipe bracket on the inner
edge of the shaft opening. If this is not possible for
reasons of space, the pipe bracket can also be fitted
offset at an angle with a 90° bent angle bracket at the
underside of the shaft cover. Temporarily attach the
pipe bracket using 2 screws.
•
Align the coupling foot on the shaft floor, use plumb
bob from the pipe console; the guide pipes must
stand exactly perpendicular! Attach the coupling foot
to the shaft floor using heavy-duty anchors. Ensure
the exact horizontal position of the coupling foot!
Support the bearing surface accordingly if the shaft
floor is uneven.
•
Install the discharge line with fittings while de-ener-
gized according to known installation principles.
•
Place both guide pipes in the eyes on the coupling
foot and correspondingly cut the position of the pipe
bracket to measure. Unscrew pipe bracket, place the
spigots into the guide pipe and permanently attach
the bracket. The guide pipes must sit absolutely free
of play, as loud noises otherwise occur when operat-
ing the pump.
•
Clean shaft before commissioning solids (debris,
stones, etc.).
•
Install the coupling counter flange of the automatic
coupling system to the pump's discharge nozzles
(threaded or flanged connection). Ensure that the rub-
ber profile seal (as a seal against the coupling foot) is
installed tightly in its seat in the counter flange, so
that falling out when lowering the pump is excluded.
•
Attach chain to the pump's carrying handle or carry-
ing eyes. Guide pump between the guide pipes in the
shaft using the guide jaws of the coupling counter
flange. Lower the pump into the shaft. When the
pump is sitting on the coupling foot, it automatically
seals itself from the discharge line and is ready for
operation.
•
Hang the lowering chain on a hook at the shaft open-
ing.
•
Hang the motor connection cable of the pump into
the shaft with an appropriate length of strain relief.
Ensure that the cables cannot be bent or damaged.
32 | ENGLISH
Automatic float switch
If the water level increases to a determined maximum
level (switching point), the floating float automatically
switches the pump on. If the water level has sunk to a de-
termined minimum level (tripping point) due to pumping
down, the float switches the pump off.
The reacting distance, i.e. the water level difference be-
tween switching point and tripping point, can be deter-
mined individually.
For perfect functioning, please note the following infor-
mation:
•
The mountings as well as the length of the freely
moveable end of the float cable must be adjusted to
the desired switch level. Here it has to be ensured
that the switching point of the pump is below the
entrance pipe so that an obstruction of the pumping
medium can be avoided. The tripping point must be
above the upper edge of the pump casing so that no
air pockets can develop in the pump, which could
possibly require de-aerating of the pump.
•
Under no circumstances may the float with the cable
be simply thrown into the medium, since a correct
switch is only possible with a rotational movement of
the float around the mounting point of the cable. Pos-
sible consequences in the event of non-compliance
are flooding (the pump does not start)/destruction of
the pump due to a dry run (the pump does not switch
off).
•
When using separate floats for start of the pump,
stop of the pump and alarm, the switch levels have to
be chosen as described above. The alarm float should
switch approximately 10 cm above the switch point
of the pump, however always below the input.
Important: After each change of the mounting of the
•
float, a correct function of the float switch must be
checked with a test run.
5.3. Use of chains
Chains are used to lower/lift the pump into/out of the me-
chanical room. They are not designed for securing a float-
ing pump.
For use according the instructions follow these steps:
•
Fix one end of the chain to the provided eyelet/the
handle of the pump.
•
Fix the other end on the lifting device.
•
Tighten the chain and lift the pump slowly and in a
controlled manner.
•
Swing the pump subsequently over the mechanical
room and lower it carefully.
•
Lower the pump as far as the operation point and en-
sure a steady position of the pump.
•
Remove the chain from the lifting device and safe-
guard this on the chain guard, which is at the upper
edge of the mechanical room. This ensures that the
chain cannot fall into the mechanical room and does
not pose danger to anyone.
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