Wilo TWI 5 - Pump Application; Product Overview; Technical Characteristics; Pump and Motor Design

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Handle the pump carefully so as not to damage
the unit prior to installation.
4. Application
CAUTION! Possible damage of the pump.
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Series TWI5 submersible pumps are suitable for
the application areas following:
• For not very deep wells, tank, cistern.
• Pumping and water distribution for:
domestic use (potable water supply)
a
gricultural use (watering, irrigation),
•
Pumped liquids: non polluted, potable, cold, rain
w
aters.
T
he pump is not suitable for continuous use, e.g.
f
or the operation of fountains.
(Continuous operation > 2 hrs reduces the life-
time of the pump).
The pump must not be used for emptying swim-
ming pools.
5. Product
5.1 Type key
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Pump family
SE - Lateral suction
Nominal flow in m3/h
Number of stages
EM - Single phase 230V
DM - Tree phase 400V
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B - index of technical evolution
5.2 Technicals characteristics
• Maximum operating pressure: 10 bar
• Suction pressure (SE version): 0,1 to 4 bar
• Liquid temperatures max.: 40 °C
• Power P1: see nameplate
• Current: see nameplate
• Speed of rotation: see nameplate
• Protection index motor: IP68
• Protection index switchbox (single phase): IP54
• Insulation class: 155
• Frequency: 50 Hz
• Voltage Single phase: 230V (± 10 %)
Tree phase: 400V (± 10 %)
• Cable length: 20m
• Max. starts per hour: 40
• Maximum immersion depth.: 20m
• Solid part size.: 2mm
• Maximum sand content: 50g/m3
Outline and pipe connections: (See Fig. 1)
5.3 Scope of Supply
• Single phase pump with connecting cable
(H07RN-F) and switchbox with 2 m mains cable
and shock-proof plug,
or three phase pump with connecting cable
(H07RN-F) and a three cable end.
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• Carrying rope 20m.
• Installation and operating instructions.
• Security instructions.
5.4 Accessories
Accessories must be ordered separately.
• Insulation valve
• Non return valve
• Control box and protection
• Circuit breaker
• Float switch
• Overflow sound alarm
• Fluid control
• Pressure switch
• Floating suction filter:
- suction coarse strainer,
- suction fine strainer
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For specifications and descriptions of acces-
sories, see catalogue/data sheet.
5.5 Product description (Fig. 2, 3, 4, 5, 6 and 7)
1. Non return valve
2. Valve
3. Float switch
4. Control box (single-phase)
5. Carrying rope
6. Fluid control
7. Supply cable
8. Float in low position
9. Float in high position
10. Pressure switch
11. Connection box (three phase)
12. Floating suction filter
13. Venting hole (Ø3 mm)
14. Suction strainer
5.6 Design of pump and motor
The submersible pump is based on multi-stage
and centrifugal design.
All parts in contact with the flow medium are of
corrosion-resistant material.
The electric motor is protected of the hydraulic
part pump by two mechanicals seal and a oil
chamber for maintained the tightness of the
motor.
The pumps are supplied with a carrying rope.
The pump base contains a suction strainer.
The SE type model are fitted with a suction sup-
port to allow the connection of floating or fixed
suction filters, with 4 vibration absorbers for
installation on the ground.
The single-phase motor pumps (EM) are deliv-
ered ready for connection with a switchbox. It
contains:
• Over current protection with manual reset,
• Motor capacitor,