English
4
WILO SE 10/2021
3 Transport and interim storage
Immediately after receiving the product:
• Check the product for damage in transit.
• If damage is found, the necessary procedures
involving the forwarding agent must be taken
within the specified period.
CAUTION! Danger of material damage!
The product may be damaged if it is not trans-
ported and stored correctly.
• For transport, the pump may only be lifted or
carried using the brackets intended for that pur-
pose. The cable should never be used for lifting!
• The pump must be protected from moisture,
frost, heat, direct sunlight and mechanical dam-
age during transport and interim storage.
• Firmly seal the pump pressure port to avoid con-
tamination.
• During transport and interim storage observe
that the freezing point of the motor fluid
is -8 °C.
• Protect all electricity supply cables from kink-
ing, damage and the penetration of moisture.
• Store the pump horizontally on a solid, level sur-
face.
4 Intended use
Wilo-Sub TWI submersible pumps are suitable for
pumping clean or slightly muddy water not con-
taining long fibrous and abrasive components.
They are used for the following applications:
• for boreholes and cisterns,
• for pumping and distributing secondary hot water
for:
• domestic use (potable water supply)
• agriculture (irrigation, sprinkling)
• industry (pressure boosting etc.)
NOTE: Follow the locally applicable regulations for
the intended application.
The pumps are only installed flooded (immersed)
and can be installed horizontally and vertically
with cooling jacket pipe.
CAUTION! Danger of material damage! Pumping
materials which are not approved can lead to
damage to the product.
The pumps are not suitable for water containing
coarse contaminants such as fibres or flammable
liquids or for use in potentially explosive areas.
Correct use of the pump/installation also includes
following these instructions.
Any use over and beyond these is considered to be
incorrect use.
5 Product information
5.1 Type key (standard versions)
5.3 Scope of delivery (standard versions)
• Submersible motor pump
• Integrated non-return valve
• Connecting cable
• 1.5 m, 2.5 or 5 m long, detachable connecting
cable (4x1.5 mm²) for 4" motors or
• 4 m long connecting cable (4x4 mm²)
for 6" motors
• 230 V incl.:
• Switchbox with capacitor
• Integrated thermal motor protection
• On/Off switch
NOTE: Electrical connections are prepared at the
works.
• Installation and operating instructions
5.4 Accessories (optional):
• Non-return valve on the borehole output
• Dry-running protection system: Float switch or
electrode
• WILO-ER switchgear (motor prot water-
level monitoring)
• Motor cable: as kit (incl. plug) or by the meter
(without plug)
Example:
WILO-Sub TWI 4.01-09-B EM
TWI
Submersible pump
4 or 6
Minimal diameter:
4" and 6" borehole diameters
Pump diameter max. 98 mm for 4",
max. 152 mm for 6"
.01
Rated volume flow rate (m³/h)
-09
Number of pump stages
-B
Pump generation
EM
EM = Single-phase 1~230 V (50 Hz/60 Hz)
with soft starter
DM = Three-phase current 3~400 V (50 Hz),
3~480 V (60 Hz)
SD = Three-phase current, star-delta-start
(6" motors only)
5.2
Technical data
50 Hz
60 Hz
Permissible fluid compo-
nents:
max. sand content 50 g/m³
Mains voltage:
1~230 V (4"),
3~400 V
(4", 6")
1~230 V (4")
3~480 V
(4", 6")
Protection class:
IP 68
Max. volume flow:
4" = 20 m³/h
6" = 78 m³/h
4" = 25 m³/h
6" = 97 m³/h
Max. delivery head:
4" = 320 m
6" = 410 m
4" = 340 m
6" = 520 m
Pressure port:
1¼", 1½", 2" for 4" hydraulics
2½", 3" for 6" hydraulics
Permissible fluid tempera-
ture range:
+3 to 30 °C
Max. submersion depth:
350 m
Max. switching frequency:
20/h
