Operating Modes; Technical Data; Scope Of Delivery; Accessories (Optionally Available) - Wilo Sub TWU 4 Serie Instrucciones De Instalación Y Funcionamiento

is drained, then the unit starts up and refills the pipe
and diaphragm vessel.
The pressure switch regulates the water pressure by
starting the unit. The current pressure can be read on
the manometer.
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 30 °C
• Protection class: IP 68
• Isolation class: F
• Speed: see type plate
• Max. submersion: 200 m
• Starts per hour: max. 20
• Max. sand content: 50 mg/m³
• Discharge port:
• TWU 4-02... : Rp 1¼
• TWU 4-04... : Rp 1¼
• TWU 4-08... : Rp 2
• TWU 4-16... : Rp 2
• Min. flow at the motor: 0.08 m/s
• Operating modes
• Submerged: S1
• Emerged: -
4.6 Type code
Example: Wilo-Sub TWU 4-0207-x
• TWU = submersible motor pump
• 4 = diameter of the hydraulics in inches
• 02 = nominal flow volume in m³/h
• 10 = number of stages of the hydraulic system
1
• x = version:
• without = standard pump
• P&P/FC = as Plug&Pump system with FluidControl
• P&P/DS = as Plug&Pump system with pressure
switching
• QC = with QuickConnect cable connection
• GT = version for geothermal applications
2
• x = series generation

4.7 Scope of delivery

Standard pump:
• Unit with 1.5, 2.5 or 4 m cable (from motor upper edge)
• Installation and operation manual
• AC version with start-up device and free cable ends
• DC version with free cable ends
Installation and operating instructions Wilo-Sub TWU 4..., TWU 4-...-QC, TWU 4-...-P&P
: see type plate
2
1 2
-x
QC version:
• Unit with 1.5 m QuickConnect cable with free cable
ends
• Installation and operation manual
Plug&Pump systems:
Wilo-Sub TWU...P&P/FC for domestic garden irriga-
tion on private green spaces:
• Unit with 30 m connection cable approved for use with
drinking water
• Switch box with capacitor, thermic motor protection
device and on/off switches
• Wilo FluidControl (FC); automatic flow and pressure
monitors with integrated dry-run protection
• 30 m retaining/rigging line
• Installation and operation manual
Wilo-Sub TWU...P&P/DS for private water supplies for
single family homes and apartment houses:
• Unit with 30 m connection cable approved for use with
drinking water
• Switch box with capacitor, thermic motor protection
device and on/off switches
• Wilo pressure switching, 0-10 bar, incl. 18 l diaphragm
expansion vessel, manometer, stop valves and pres-
sure switches
• 30 m retaining/rigging line
• Installation and operation manual

4.8 Accessories (optionally available)

• Cooling jacket
• Switching devices
• Level sensors
• QuickConnect cable sets
• Motor cable kits
• Encapsulating set 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.
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