Wilo Sub TWU 3 HS Serie Notice De Montage Et De Mise En Service page 39

INSTALLATION
9. Place two scantlings over the well shaft. Lower
the unit until the supporting clamp is in resting on
the scantlings.
10. Disassemble the mounting bracket from the
discharge pipe and fit the well closure (e.g. well
cover) on the discharge pipe.
WARNING: Danger of crushing!
During installation, the entire weight of the
unit is borne by the lifting equipment and the
bearer cable may be under tension. This can
result in severe crushing! Before disassem-
bling the mounting bracket, make sure that
the bearer cable is NOT under tension!
11. Fasten the lifting equipment to the well closure
and hoist the entire unit (consisting of the pump,
piping and well closure).
12. Disassemble the supporting clamp, remove the
scantlings and lay the power supply cable through
the well closure to the outside.
13. Place the unit on the well and fasten the well
closure.
14. Fit the discharge pipeline to the tap on the well
closure and lay the power supply cable to the
switchbox.
Installing piping for deep wells
Long piping is needed for deep wells. With
lengths of 10 m or more, impermissible bending
tension may occur when lifting the piping and it
may become damaged.
To prevent this, the piping must be installed suc-
cessively in short lengths.
To do this, the individual sections (recommenda-
tion: max. 3 m) are lowered into the borehole and
installed one after the other. This way, longer
piping can be installed for deep wells without any
problems.
NOTE:
Metallic pressure pipes must be integrated in
the potential equalisation in accordance with
the locally applicable regulations and recog-
nized rules of technology:
• Since the external frequency converter has
an insulating effect, note that the pipeline
upstream and downstream of the frequency
converter as well as the pump unit are integrat-
ed into the potential equalization.
• Note the extensive, impedance connection of
the contacts!
Installing flexible piping
The pump can also be used with flexible piping
(e.g. hoses). In this case, the piping is fitted to the
pressure connection and then lowered into the
borehole together with the pump.
Note:
• Nylon or stainless steel guys are used to lower the
pump.
• The guy must have sufficient bearing capacity for
the complete system (pump, piping, cable, water
column).
Installation and operating instructions Wilo-Sub TWU 3-...-HS (High Speed)
• The guy must be fastened to the suspension
points (eyelets) provided on the pressure port
for that purpose. If these suspension points are
not available, an intermediate flange containing
suspension points must be installed.
DANGER due to improper fixation.
The guy must not be wound around the pres-
sure port or affixed to the piping. This could
result in slipping or the piping might become
separated. There is an increased risk of injury!
Always fasten the guy to the prescribed sus-
pension points!
5.3.3 Horizontal installation of the pump
This installation method is only permissible in
conjunction with a cooling jacket. The pump is
installed directly in the water tank/reservoir and
flanged onto the discharge pipeline. The cool-
ing jacket's supports have to be installed at the
specified distance in order to prevent bending of
the unit. For more information, see the installa-
tion and operating instructions for the cooling
jacket in question.
The connected piping must be self-supporting,
i.e. it must not be supported by the unit.
In the case of horizontal installation, the pump
and piping are installed separately. Make sure
that the pressure connection for the pump and
the pressure connection for the piping are at the
same height.
1. Drill the mounting holes for the support into the
floor of the operating space (tank/reservoir). See
the relevant instructions for information about
the anchor bolts, distances between holes and
size of holes. Pay attention to the required tight-
ness of screws and anchors.
2. Fasten the supports to the floor and move the
pump into the correct position using suitable
hoisting gear.
3. Fasten the pump to the supports with the fixation
material provided. Make sure that the rating plate
faces upwards!
4. Once the pump has been firmly installed, the pipe
system can be mounted or a pipe system installed
previously can be attached. Make sure that the
pressure connections are at the same height.
5. Connect the discharge pipe to the pressure con-
nection. The threaded connection must be sealed.
Make sure that the pipe system was installed
vibration-free and stress-free (if necessary, use
elastic adaptors).
6. Lay the cable in such a way that it does not pose
a danger to anyone (maintenance personnel, etc.)
at any time (during operation, during mainte-
nance work, etc.). The power supply cables must
not be damaged. The electrical connections must
be carried out by an authorised expert.
English
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