Wilo Sub TWU 3 Série Notice De Montage Et De Mise En Service page 31

The water reserves in the diaphragm vessel prevent the
unit from starting until the activation point is reached
when at low water drainage levels.
4.4 Operating modes
4.4.1 Operating mode "S1" (continuous operation)
The pump can operate continuously at the rated load
without exceeding the maximum permissible tempera-
ture.
4.5 Technical data
General data
• Mains supply: see type plate
• Rated motor capacity P
• Max. pump head: see type plate
• Max. pump flow: see type plate
• Activation type: direct
• Liquid temperature: 3 to 40 °C
• Protection class: IP 58
• Isolation class: F
• Speed: see type plate
• Max. submersion: 150 m
• Starts per hour: max. 30
• Max. sand content: 50 mg/m³
• Discharge port: Rp 1
• Min. flow at the motor: 0.08 m/s
• Operating modes
• Submerged: S1
• Emerged: -
4.6 Type code
Example: Wilo-Sub TWU 3-0210-x
• TWU = Submersible motor pump
• 3 = Diameter of hydraulics (in inches)
• 02 = Nominal flow volume (in m³/h)
• 10 = Number of levels on hydraulics
1
• x = Version:
• None = Standard pump
• P&P/FC = Plug&Pump system with fluid control
• P&P/DS = Plug&Pump system with pressure switch-
ing
2
• x = Series generation
4.7 Scope of delivery
Standard pump:
• Unit with 1.8 m cable (from top edge of motor)
• Installation and operation manual
• AC version with start switching device and free cable
ends
• Three-phase version with free cable ends
Plug&Pump systems:
Wilo-Sub TWU...P&P/FC for domestic garden irriga-
tion in private green spaces:
• Unit with 30 m connection cable approved for use with
drinking water
• Switch box with capacitor, thermal motor protection
and on/off switch
• Wilo fluid control (FC); automatic flow/pressure moni-
tor with integrated dry-run protection
• 30 m holding/rigging cable
Installation and operating instructions Wilo-Sub TWU 3..., TWU 3-...-P&P
: see type plate
2
1 2
-x
• Installation and operation manual
Wilo-Sub TWU...P&P/DS for supplying water to pri-
vate households:
• 30 m connection cable approved for use with drinking
water
• Switch box with capacitor, thermal motor protection
and on/off switch
• Wilo pressure switching kit (0-10 bar), incl. 18 l dia-
phragm expansion tank, manometer, shut-off device
and pressure switch
• 30 m holding/rigging cable
• Installation and operation manual
4.8 Accessories (optionally available)
• Cooling jacket
• Switching devices
• Level sensors
• Motor cable kits
• Casting kit for motor cable extension
5 Installation
In order to prevent damage to the product or serious
injury during installation, the following points must be
observed:
• Installation work – assembly and installation of the
machine – may only be carried out by qualified per-
sons. The safety instructions must be followed at all
times.
• The machine must be inspected for transport damage
before carrying out any installation work.
5.1 General
In cases where pumping is made through longer dis-
charge pipes (especially on long ascents), attention is
drawn to pressure surges.
Pressure surges can lead to destruction of the unit/
system and noisy operation resulting from valve
knocking. This can be avoided by taking appropriate
measures (e.g. non-return valves with adjustable clo-
sure time or laying the discharge pipe in a special way).
After pumping water containing lime, flush out the
product with clean water in order to prevent encrusta-
tion and subsequent breakdowns.
If you are using level control, make sure that the mini-
mum water coverage is present. Air pockets in the
hydraulic housing or pipeline system must be avoided
at all costs and must be removed using a suitable ven-
tilation system. Protect the product from frost.
5.2 Types of installation
• Vertical stationary installation, submerged
• Horizontal stationary installation, submerged - only to
be used together with a cooling jacket!
5.3 The operating area
The operating area must be clean, free of coarse solids,
dry, frost-free and, if necessary, decontaminated. It
must also be suitable for the respective product. The
water supply must be sufficient for the maximum flow
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