Product Description; Intended Use And Fields Of Application - Wilo SUB TWU 3- -HS Série Notice De Montage Et De Mise En Service

PRODUCT DESCRIPTION

fixation of accessories and piping, the duty point,
immersion depth, etc.
We recommend that the operator should take an
additional measurement at the workplace once
the unit is running at its duty point and under all
operating conditions.
CAUTION: Wear ear defenders!
According to applicable laws and regula-
tions, ear protection must be worn if the
sound-pressure level is 85 dB(A) or more!
The end-user must make sure that this is
complied with!
2.8. CE marking
The CE mark is found on the rating plate and the
rating plate is attached to the motor housing.
3. Product description
The pump is manufactured with great care and is
subject to constant quality controls. Trouble-free
operation is guaranteed if it is installed and main-
tained correctly.

3.1. Intended use and fields of application

ELECTRICAL hazard
When using the pump in swimming pools or
other basins that can be entered, there is
a risk of electrocution. Note the following:
• Use is strictly forbidden if there are people in
the basin!
• If there are no people in the basin, protec-
tive measures must be taken according to
DIN EN 62638 (or the appropriate national
regulations).
DANGER due to explosive fluids!
Pumping explosive fluids (e.g. petrol, paraffin,
etc.) is strictly prohibited. The pumps are not
designed for these fluids!
The submersible pumps are suitable for:
• For water supply from boreholes, wells and rain-
water storage tanks
• For domestic water supply, sprinkling and irriga-
tion
• For pumping water without long-fibre and abra-
sive constituents
The submersible pumps must not be used for
pumping:
• Wastewater
• Sewage/faeces
• Untreated sewage
The intended use includes complying with these
instructions. Any other use is considered to be
outside the intended use.
3.1.1. Pumping potable water
When used to pump potable water, the local
guidelines/laws/regulations must be checked to
Installation and operating instructions Wilo-Sub TWU 3/High Speed
establish whether the pump is suitable for this
application.
3.2. Set-up
The Wilo-Sub TWU 3-...-HS is a submersible
pump that is immersed in a stationary installation,
either vertically or horizontally, and operated via
a frequency converter.
Fig. 1.: Description of the submersible pump
1 Cable
2 Suction piece
3 Motor housing
Fig. 2.: Description of the external frequency converter
1 Inlet
2 Pressure connection
3.2.1. Hydraulics
Multistage hydraulics with radial impellers in
sectional construction. The hydraulics housing
and the pump shaft are made of stainless steel
and the impellers are made of polycarbonate.
The connection on the pressure side is designed
as a vertical threaded flange with a female thread
and integrated non-return valve.
The pump is not self-priming, i.e. the fluid must
flow in either automatically or with supply
pressure and a minimum coverage must be
ensured at all times.
3.2.2. Motor
The motors used are all oil-filled three-phase
AC motor for direct starting on the frequency
converter. The motor housing is made of stainless
steel and has a shaft connection for 3" hydraulics.
The motor is cooled by the pumped fluid.
Therefore, the motor must always be operated
immersed. The limit values for maximum fluid
temperature and minimum flow velocity must be
adhered to.
The connection cable has free cable ends, is
longitudinally watertight and is connected to the
motor by a detachable plug.
3.2.3. Frequency converter
The frequency converter is either enclosed as an
external component (TWU 3-...-HS-ECP) or it is
integrated in the motor (TWU 3-...-HS-I).
Like the motor, the frequency converter is cooled
by the fluid. To do this, the external frequency
converter must be installed in the ascending pipe.
The internal frequency converter is cooled by the
surrounding fluid.
4 Hydraulic housing
5 Pressure connection
Internal frequency
6
converter
Control panel and
3
display
English
33