Wilo SUB TWU 3 Notice De Montage Et De Mise En Service page 38

English
Do not place the motor on the bottom of the pit,
as this can lead to tension and mud accumulation
in the motor. If the motor becomes blocked with
mud, the heat discharge can no longer be ensured
and the motor may overheat.
Additionally, the pump should not be installed
level with the filter pipe. Sand and other solids
may be pumped through the suction flow, mean-
ing the motor cooling can no longer be guaran-
teed. This would lead to increased wear on the
hydraulics. To prevent this, a water guide shroud
should be used when necessary, or the pump
should be installed next to blind pipes.
NOTE:
The following information must be observed
when installing pipes with threaded connec-
tions:
• The threaded pipes must be screwed tight to
each other without leaks. This means the pipe
ends must be wound with oakum or Teflon tape.
• When screwing the pipes together, make sure
that they are in line, so that the thread is not
damaged.
• Note the direction of rotation on the unit.
Use pipes with the correct thread (right or
left-handed) so that the pipes cannot become
unscrewed by accident.
• The threaded pipes must be secured against
accidental loosening.
1. Screw the individual pipes together.
2. Fit the pipeline on the discharge port of the
pump.
3. Run the power supply cable along the pipeline.
Always fasten the cable above and below a pipe
connection with a cable clip.
4. At the last pipe, fit a mounting bracket at the
discharge port and a support clamp below the
discharge port.
Make sure that the cable is not damaged by
the support clamp. The cable must always run
outside the support clamp!
5. Attach the lifting device at the mounting bracket
and raise the complete unit.
6. Swing the unit over the borehole and lower it
slowly.
Make sure that the cable and the sides of the
well do not become damaged!
7. Place two pieces of square timber over the well
opening. Lower the unit until the support clamp
is resting on the pieces of timber.
8. Remove the mounting bracket from the discharge
pipe and fit the well cover (e.g. well head) on the
discharge pipe.
BEWARE of dangerous crush injuries!
During assembly, the lifting device bears the
entire weight and the suspension cable can
be under tension. This can lead to serious
crush injuries! Before removing the mounting
bracket, ensure that the suspension cable is
NoT taut!
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9. Fit the lifting device at the well cover and raise
the complete unit (consisting of the pump, pipe-
line and well cover).
10. Take off the support clamp, remove the timber
and feed the power supply cable outside through
the well cover.
11. Place the unit on the well and fasten the well
cover.
12. Fit the discharge pipe to the tapping point at the
well cover and run the power supply cable as far
as the switching unit.
Fitting pipelines for deep wells
Long pipelines are needed for deep wells. If the
pipeline is 10 m or longer, excessive bending
tension may occur when it is lifted, which can
damage the pipeline.
To prevent this, the pipeline must be fitted in
short lengths one behind the other.
The individual sections (max. 3 m recommended)
are lowered into the borehole and fitted one after
the other. This also allows longer pipelines for
deep wells to be assembled without difficulty.
Fitting flexible pipelines
The pump can also be used with flexible pipelines
(e.g. hoses). In this case, the pipeline is fitted
on the discharge port and then lowered into the
borehole complete with the pump.
When doing so, the following must be
remembered:
• Restraining ropes made of nylon or stainless
steel are used to lower the pump.
• The restraining rope must have sufficient
load-bearing capacity for the complete systems
(pump, pipeline, cables, water column).
• The restraining rope must be attached to the
fastening points on the discharge port (eyelets)
designed for this. If these fastening points are not
available, an intermediate flange which has these
points must be fitted.
DANGER if fixed incorrectly.
The restraining rope must not be wound
round the discharge port or fixed to the pipe-
line. it could slip off or the pipe could break
off. This can cause severe injuries! Always fix
the restraining rope to the specified fastening
points!
5.4.3. Horizontal installation of the pump
This installation type is only permitted when
used together with a cooling jacket. The unit is
installed directly in the water tank/reservoir/con-
tainer and flanged onto the discharge pipe. The
cooling jacket supports must be mounted at the
distances specified to prevent the unit from dis-
torting. Further information can be found in the
operating instructions for the particular cooling
jacket.
The connected pipeline must be self-support-
ing, i.e. it may not be supported by the unit.
INSTALLATION
WILO SE 12/2012 Ed.03 DIN A4