Wilo Rexa CUT, Installation And Operating Instructions Manual

Page: 49 / 384

Installation and operating instructions Wilo-Rexa CUT 49
DECOMMISSIONING/DISPOSAL English
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.
6.6. Conduct during operation
BEWARE of the macerator!
The pump is equipped with a macerator. When
coming into contact with the blade, limbs
may be crushed or be amputated! Never reach
directly into the macerator.
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.
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.
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!
Lifting gear and equipment must be in
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 oper -
ating space 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
must be unplugged (do not pull the cable!). Work
on removal, maintenance and storage can then
commence.
BEWARE of poisonous substances!
Pumps that pump liquids hazardous to health
must always be decontaminated before un-
dertaking any other work. Otherwise, there
is a risk of fatal injury! Wear the necessary
physical protection equipment!
BEWARE of burns!
The housing parts can heat up to well above
40 °C. There is a risk of burns! After switch -
ing it off, let the pump cool down to ambient
temperature.
7.3. Removal
7.3.1. Portable wet well installation
Pumps in portable wet well installation can be
lifted out of the pit once they have been discon-
nected from the mains and the pressure pipe has
been drained. It may be necessary to dismantle
the hose first. It may be necessary to use a suita -
ble lifting device.