Electrical System; Rotation Direction Monitoring; Level Control; Operation In Potentially Explosive Areas - Wilo EMU FA Serie Instrucciones De Instalación Y Funcionamiento

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• Electrical and mechanical adjustments must be
made by specialist staff.
• The pump is suitable for use under the specified
operating conditions.
• The work area of the pump is not a recreational
area and is to be kept free of people! No persons
are allowed in the work area during start-up or
operation.
• When working in shafts, a second person must be
present for safety reasons. Adequate ventilation
must be ensured if there is danger of poisonous
gases forming.

6.1. Electrical system

Connect the pump and install the power supply
cables as described in the "Installation" section
and in accordance with the VDE guidelines and
applicable national regulations.
The pump must be properly protected and
grounded.
Pay attention to the direction of rotation! If the
direction of rotation is incorrect, the pump will
not perform as specified and may be damaged.
Make sure all monitoring devices are connected
and have been tested.
ELECTRICAL hazard!
Electrical current can cause fatal injuries if not
handled correctly! All pumps with free cable
ends (i.e. without plugs) must be connected
by a qualified electrician.

6.2. Rotation direction monitoring

The pump is checked and adjusted in the factory
to ensure that the direction of rotation is correct.
The connection must be made according to the
wiring labels.
A test run must be performed under general op-
erating conditions!
6.2.1. Checking the direction of rotation
The direction of rotation must be checked with
a rotating field tester by a local electrician. For the
correct direction of rotation, a clockwise rotating
field must be available.
The pump is not approved for operation with
a counter-clockwise rotating field!
6.2.2. If the direction of rotation is incorrect
If the direction of rotation is incorrect for direct
start motors, 2 phases must be swapped. In the
case of star-delta motors, the connections of two
windings must be swapped, e.g. U1 with V1 and
U2 with V2.

6.3. Level control

The level control device is to be checked to en-
sure it is installed properly and the settings of the
switching points are to be inspected. For the re-
quired information please refer to the installation
and operating instructions for the level control
device, as well as the planning documentation.
58

6.4. Operation in potentially explosive areas

If the pump is labeled accordingly, it can be used
inside potentially explosive areas.
RISK of fatal injury due to explosive atmo-
sphere!
Pumps without Ex labeling may not be used
in potentially explosive areas! There is a risk
of fatal injury due to explosion! Check your
pump before use to verify that it has corre-
sponding approval:
• Ex symbol
• Ex-classification, e.g. II 2G EEx d IIB T4
• Also note the additional information in the
appendix!

6.5. Commissioning

Minor oil leakage in the mechanical shaft seal on
delivery is no cause for concern. However, it must
be removed prior to submersion in the fluid.
Keep out of the pump's work area. No persons
are allowed in the work area during start-up or
operation.
WARNING: Danger of crushing!
In portable installations, the pump can fall
over when it is switched on or during opera-
tion. Make sure that the pump is positioned
on a firm bearing surface and that the pump
base is mounted correctly.
If the pump falls over, it must be switched off
before setting it up again.
In the case of versions with plugs, note the IP
protection class of the plug.
6.5.1. Initial commissioning
The following points must be checked before the
initial commissioning phase:
• Inspecting the installation as described in the
"Installation" section.
• Performing an insulation check as described in the
"Maintenance" section.
• Checking the switching level of the level control
device
6.5.2. Before switching on
LETHAL explosion hazard
If the gate valves on the suction and pressure
side are closed during operation, the fluid in
the hydraulic housing will be heated up by the
pumping movement. Considerable pressure
is created in the hydraulic housing by the
heating. The pressure can cause the pump to
explode! Before switching on the unit, ensure
that all the slide valves are open and open any
closed slide valves.
Check the following:
• Cable guidance – no loops, slightly taut
• Check the temperature of the fluid and the im-
mersion depth – see technical data
COMMISSIONING
WILO SE 05/2014 v05 DIN A4