Vertical Installation - Wilo Sub TWU 3 Série Notice De Montage Et De Mise En Service

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rate on the unit so that dry running and/or air entry is
prevented.
When installed in wells or bore holes, ensure that the
unit does not come into contact with the walls. There-
fore, ensure that the outer diameter of the submers-
ible motor pump is always smaller than the inner
diameter of the well or bore hole.
When working in containers, wells or bore holes, a sec-
ond person must always be present for safety reasons.
If there is danger of poisonous or asphyxiating gases
forming, the necessary countermeasures must be
taken!
It must be ensured that hoisting gear can be fitted
without any trouble, since this is required for assembly
and removal of the product. It must be possible to
reach the product safely in its operating and storage
locations using the hoisting gear. The machine must be
positioned on a firm foundation. For transporting the
product, the load-carrying equipment must be secured
to the appropriate fastening points.
Electric power cables must be laid out in such a way
that safe operation and trouble-free assembly/disman-
tling are possible at all times. The product must never
be carried or dragged by the power supply cable. When
using switching devices, the corresponding protection
class must be observed. Switching devices must always
be mounted in such a way that they are protected from
flooding.
The structural components and foundations must be of
sufficient stability in order to allow the product to be
anchored securely and functionally. The operator or the
supplier is responsible for the provision of the founda-
tions and their suitability in terms of dimensions, sta-
bility and strength!
Use guide and deflector plates for the pumped liquid
intake. If the water jet reaches the surface of the
water, air will be introduced into the pumped liquid.
This will lead to unfavorable current and pumping con-
ditions for the unit. As a result of cavitation, the prod-
uct does not run smoothly and is subjected to
increased wear.
5.4 Installation
Danger of falling!
When installing the product and its accessories,
work is sometimes performed directly at the
edge of the well or basin. Carelessness and/or
wearing inappropriate clothing could result in a
fall. There is a risk of fatal injury! Take all neces-
sary safety precautions to prevent this.
The following information must be observed when
installing the product:
• This work must be carried out by a qualified person and
electrical work must be carried out by an electrician.
• Suitable fastening devices must always be used when
transporting the unit, never the power supply cable.
The fastening device must always be secured to the
fastening points, using shackles when necessary. Fas-
tening devices must be technically approved.
32
• Check that the available planning documentation
(installation plans, layout of the operating area, intake
ratios) is complete and correct.
Products of this type must always be submerged
during operation to attain the necessary cooling.
Always make sure that the minimum water cov-
erage is guaranteed!
Never let the machine run dry. We recommend
that dry-run protection be installed. If fluid levels
deviate dramatically, a dry-run protection must
be installed.
Check whether the cross section of the cable
used is sufficient for the required cable length
(see the catalog and planning documents or con-
sult Wilo customer service for more information).
• Please observe all regulations, rules and legal require-
ments for working with and underneath heavy sus-
pended loads.
• Wear appropriate protective clothing/equipment.
• Please also observe the applicable national accident
prevention regulations and trade association safety
provisions.
• The coating is to be examined before installation. If
defects are found, these must be rectified before
installation.
5.4.1 Motor filling fluid
The motor is already filled with oil at the factory. This
ensures that the product is protected from frost up to
-15 °C.
The motor is designed to that it cannot be filled from
the outside. Filling of the motor must be carried out by
the manufacturer. The filling level must be checked
after a long period in storage (> 1 year)!

5.4.2 Vertical installation

Fig. 2: Installation
1 Unit
2 Rising pipe
3 Switching device
4 Check valve
5 Well head
6 Minimum water level
7 Level sensors
With this type of installation, the product is installed
directly on the rising pipe. The installation depth is
determined according to the length of the rising pipe.
Do not place the product 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 product should not be installed level
with the filter pipe. Sand and other solids may be
pumped through the suction flow, meaning the motor
8 Support clamp
9 Mounting bracket
10 Cable clamp
11 Power supply line
12 Flange
13 Dry-run protection
WILO SE 10/2011 V4.1WE