Installation and operating instructions Wilo-Rexa FIT
43
DECOMMISSIONING/DISPOSAL
English
• Clean the pump sump of coarse contaminants
•
Open all slide valves on the pressure side
•
The following points must also be checked for dry
well installation:
•
Clean the piping on the suction side – flush
with clean water to prevent deposits forming
clogging.
•
Open all slide valves on the pressure and suc
-
tion sides
If the slide valves on the suction and pressure
sides are closed during operation, the fluid
in the hydraulics housing is heated up by the
pumping movement. This heating creates
strong pressure in the hydraulics housing.
The pressure can result in the pump exploding.
Before switching on the pump, ensure that all
the slide valves are open and open any closed
slide valves.
6.4.2. Switch on/off
The pump is switched on and off using a sepa
-
rate operating point (on/off switch, switchgear)
provided by the customer.
During the start-up procedure, the rated current
is temporarily exceeded. After the start-up pro
-
cedure is finished, the current must not exceed
the rated current again.
If the motor does not start up, it must be
switched off without delay. Before switching it on
again, wait for the specified start pause and make
sure to rectify the fault.
6.5. Safety rules during operation
When operating the pump, always follow the
locally applicable laws and regulations for work
safety, accident prevention and handling elec-
trical machinery. To help ensure safe working
practice, the responsibilities of employees should
be clearly specified by the operator. All personnel
are responsible for ensuring that regulations are
observed.
Due to their design, centrifugal pumps have
rotating parts that are easily accessible. Depend-
ing on the operating condition, sharp edges can
develop on these parts.
WARNING: Danger of crushing and amputation
of limbs!
Sharp edges can form on the rotating parts in
the hydraulics. These can result in crushing
and amputation of limbs. Never reach into the
hydraulics when the machine is in operation.
The following must be checked at regular inter
-
vals:
•
Operating voltage (permissible dev/-
5% of the rated voltage)
•
Frequency (permissible dev/- 2 % of
the rated frequency)
• Current consumption (permissible deviation
between phases is a maximum of 5%)
• Voltage difference between the individual
phases (max. 1%)
• Switching frequency (see technical data)
•
Avoid air entry in the inlet, a deflector plate
should be fitted if necessary
• Minimum water submersion
• Switching points for level control device or
dry-running protection
• Smooth running
• All slide valves must be open.
If the slide valves on the suction and pressure
sides are closed during operation, the fluid
in the hydraulics housing is heated up by the
pumping movement. This heating creates
strong pressure in the hydraulics housing.
The pressure can result in the pump exploding.
Make sure that all slide valves are open during
operation.
7. Decommissioning/disposal
• All work must be carried out with the greatest
care.
• Proper protective clothing is to be worn.
• When carrying out work in basins and/or tanks,
the respective local protection measures must be
observed. A second person must be present for
safety reasons.
•
Only lifting equipment that is in a technically
perfect condition and load-carrying equipment
that has been officially approved may be used for
lowering and raising the pump.
RISK of fatal injury due to malfunctions!
Load-carrying and lifting equipment must
be in a perfect technical condition. Work
may only commence if the lifting equipment
has been checked and found to be in perfect
working order. If it is not inspected, fatal
injuries may result.
7.1. Temporary decommissioning
For this type of deactivation, the pump remains
installed and is not cut off from the electricity
supply. In the event of temporary decommission
-
ing the pump must remain completely immersed
so that it is protected from frost and ice. Ensure
that the temperature of the fluid and in the col
-
lector tank does not fall below +3 °C.
This ensures that the pump is always ready for
operation. For extended downtime, a regular
(monthly to quarterly) 5 minute function test
should be carried out.
CAUTION!
Only perform function runs under the proper
operating and usage conditions. Never run
the machine dry! This can result in irreparable
damage!
7.2. Decommissioning for maintenance work or
storage
The system must be switched off and the pump
must be disconnected from the mains by an
electrician and secured against being switched
on again without permission. Pumps with plugs
