Wilo Sub TWI 4 Serie Notice De Montage Et De Mise En Service page 34

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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.
• 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 a water/glycol mixture
at the factory. This ensures that the product is pro-
tected 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 Installing the Quick-Connect cable
On QC versions, the QC cable must be connected
before installing the unit in the operating area.
Caution: This work must be carried out in a dry
place. Ensure that both the plug and connection
socket do not contain any moisture. Moisture
penetration will destroy the cable and may dam-
age the unit!
34
• Insert the Quick-Connect plug into the Quick-Con-
nect socket on the connection cable of the unit.
• Pull the metal sleeve over the connection and screw
both cable ends together.
5.4.3 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
cooling can no longer be guaranteed. This would lead
to increased wear on the hydraulics. To prevent this, a
water guide shroud should be used when necessary, or
the product should be installed next to blind pipes.
Installation with flanged pipes
Use hoisting gear with sufficient lifting capacity. Place
two pieces of square timber across the well. The sup-
port clamp will later be placed on them, so they should
have sufficient bearing capacity. If the well opening is
narrow, a centering apparatus must be used, since the
product may not touch the sides of the well.
1 Place the submersible motor pump vertically and
secure it from falling over or slipping.
2 Attach the mounting brackets to the flange of the ris-
ing pipe, hang them on to the lifting gear and lift out
the first pipe.
3 Fasten the free end of the rising pipe to the discharge
port of the submersible motor pump. A seal must be
placed between the connections. Always insert the
bolts from below, so that the nuts can be screwed on
from above. Also, always tighten the bolts in a cross
pattern to avoid pressure on the seal from one side.
4 Fasten the cable with a cable clip slightly above the
flange. If the drilled hole is narrow, the flanges of the
rising pipes must be have notches for the cables to
pass through.
5 Lift up the unit with the pipe, move it over the well and
lower it until the support clamp on the rising pipe can
be loosely connected. When doing this, make sure that
the cable remains outside the support clamp, so that it
does not get squeezed.
6 Then let the support clamp rest on the pieces of square
timber that you put in beforehand. The system can
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