Electrical System; Check The Direction Of Rotation; Level Control; Operation In Explosion Hazard Areas - Wilo EMU KS Serie Notice De Montage Et De Mise En Service

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.
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.
Installation and operating instructions Wilo-EMU KS.../KS...Ex
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.
6.2.3 Checking the rotation direction on units with CEE
plug and integrated phase inverter
Fig. 5: CEE plug with phase inverter
To function correctly, a clockwise rotating field must
be available.
When the CEE plug is plugged in, the lamp must not
light up. If the lamp lights up, the direction of rotation
is incorrect.
To correct the direction of rotation, you must push the
phase inverter into the plug with a suitable screw-
driver and turn it 180°.

6.3 Level control

Check the following points during level control:
• When using float switches, ensure that they can move
freely in the operating area!
• Check that the cable of the float switch is fixed cor-
rectly on the pressure pipe or wall.
• The water level must not fall below the minimum!
• The maximum starts per hour may not be exceeded!
Risk of fatal injury due to explosion!
The installed float switches may only be used in
explosion hazard areas when the unit is ex-
approved and the integrated switching device is
also permitted for use in explosion hazard areas
(e.g. DMS-Ex). The use of products which are not
ex-approved can result in explosions!

6.4 Operation in explosion hazard areas

The operator is responsible for defining the explosion
hazard area. Only products with ex-approval may be
used within an explosion hazard area. Attached
switching devices and plugs must be checked for use
in explosion hazard areas.
Products that are ex-approved are labeled on the type
plate as follows:
• Ex symbol: or FM
APPROVED
• Ex-classification, e.g. Ex d IIB T4
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