Electrical System; Check The Direction Of Rotation - Wilo Sub TWU 3 Série Notice De Montage Et De Mise En Service

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The following constraints must be adhered to and
monitored:
• Type of installation
• Operating mode
• Minimum water coverage / max. submersion
If the machine has not been operated for an
extended period, these constraints must also be
checked and any discovered faults rectified.
This manual must always be kept either by the product
or in a place specially reserved for it, where it is accessi-
ble for the entire operating personnel at all times.
In order to prevent damage or serious injury when
starting up the product, the following points must
always be observed:
• The product may only be started up by qualified,
trained persons. The safety advice must be followed at
all times.
• All persons working on or with the product must have
received, read and understood this operating and
maintenance manual.
• All safety devices and emergency cut-outs are con-
nected and have been checked to ensure that they
work properly.
• Electrical and mechanical settings must be made by
specialist staff.
• The product is suitable for use under the specified
operating conditions.
• The work area of the product is not a recreational area
and is to be kept free of people! No persons are allowed
in the work area during switching on and/or during
operation.
• A second person must be present when working in
shafts. Adequate ventilation must be ensured if there
is danger of poisonous gases forming.

6.1 Electrical system

The product is connected and the power supply cables
installed in terms of the "Installation" chapter as well as
the VDE guidelines and the applicable national regula-
tions.
The product is protected and grounded properly.
Pay attention to the direction of rotation. If the direc-
tion of rotation is incorrect, the unit will not perform as
specified and can sustain damage.
All monitoring devices are connected and have been
checked to ensure that they work properly.
Beware of electrical current!
Electrical current can cause fatal injuries if not
handled correctly! All products with free cable
ends (i.e. without plugs) must be connected by a
qualified electrician.

6.2 Check the direction of rotation

The product is checked and adjusted in the factory to
ensure that the direction of rotation is incorrect. The
connection must be made according to the wiring code
information.
36
Before submerging, the product must be checked to
ensure that the rotation direction is correct.
A test run should only be performed under gen-
eral operating conditions. Switching on a unit
that has not been submerged is strictly forbid-
den!
6.2.1 Checking the rotation direction
The rotation direction must be checked with a rotat-
ing field tester by a local electrician. For the correct
rotation direction, a clockwise rotating field must be
available.
The product is not approved for operation with a
counter-clockwise rotating field.
6.2.2 If the direction of rotation is not correct
When using Wilo switching devices
Wilo switching devices are designed so that the con-
nected products are driven in the right direction. If the
rotation direction is wrong, 2 phases/leads of the
mains supply to the switching device must be replaced.
With switching devices provided by the customer:
If the rotation direction is wrong, with direct start
motors, 2 phases must be swapped. In the case of
star-delta start-up motors, the connections of two
windings must be swapped e.g. U1 with V1 and U2
with V2.
6.3 Adjusting the level-control device
For correct adjustment, please see the installation and
operation manual for the level control device.
Please observe the information on the minimum
water coverage of the product!
6.4 Adjusting the Plug&Pump system
6.4.1 TWU...P&P/FC (Economy 1)
The fluid control is preset at the factory.
6.4.2 TWU...P&P/DS (Economy 2)
Specifying the activation and deactivation pressure
The required activation and deactivation pressure must
be specified before the system can be set.
For details on the minimum and maximum values, see
the overview below:
Activation pressure Deactivation
Unit
TWU 3-0115 Min. 1.5 bar
TWU 3-0123 Min. 2 bar
TWU 3-0130 Min. 3 bar
The following values are preset at the factory:
• Activation pressure: 2 bar
• Deactivation pressure: 3 bar
pressure
Max. 5 bar
Max. 7.5 bar
Max. 9 bar
WILO SE 10/2011 V4.1WE