en
Shut-down/dismantling
38
WILO SE 2019-01
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Inlet: no air intake.
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Level control device/dry-running protection: Switching points
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Quiet/low-vibration running
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All gate valves open
Operation in the limit range
The pump can briefly be operated in the limit range (max. 15 min/day). During operation
in the limit range, expect relatively large deviations from the operating data.
NO-
TICE! Continuous duty in the limit range is prohibited! The pump is exposed to high
wear and there is a greater risk of failure!
The following parameters apply during operation in the limit range:
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Operating voltage (+/-10 % of the rated voltage)
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Frequency (+3/-5 % of the rated frequency)
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Power consumption between individual phases (max. 6 %)
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Voltage difference between the individual phases (max. 2 %)
8
Shut-down/dismantling
8.1
Personnel qualifications
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Operation/control: Operating personnel must be instructed in the functioning of the
complete system.
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Electrical work: A qualified electrician must carry out the electrical work.
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Installation/dismantling: The technician must be trained in the use of the necessary
tools and fixation materials for the relevant construction site.
8.2
Operator responsibilities
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Locally applicable accident prevention and safety regulations of trade associations.
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Observe regulations for working with heavy loads and under suspended loads.
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Provide the necessary protective equipment and make sure that the personnel wears
it.
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Provide adequate aeration in closed rooms.
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Take immediate countermeasures if there is a build-up of toxic or suffocating gases!
8.3
Shut-down
The pump is deactivated during decommissioning, but remains installed. This ensures
that the pump is always ready for operation.
‡
To protect the pump from frost and ice, always immerse the pump completely in
the fluid.
‡
The temperature of the fluid must always be above +3 °C (+37 °F).
1. Switch off the pump at the operating point.
2. Secure the operating point against being switched on again by unauthorised per-
sons (e.g. lock main switch).
▶ The pump is out of operation and can now be dismantled.
If the pump remains installed after decommissioning, observe the following:
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Ensure that the prerequisites for decommissioning are maintained for the complete
period of decommissioning. If these prerequisites cannot be guaranteed, dismantle
the pump after decommissioning!
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For an extended period of decommissioning, carry out a 5-minute function test at
regular intervals (monthly to quarterly).
CAUTION! A function test may only be car-
ried out under the applicable operating conditions. A dry run is not permitted!
Non-compliance can result in irreparable damage!
8.4
Removal
DANGER
Danger due to fluids hazardous to health!
If the pump is used in fluids hazardous to health, decontaminate the pump after dis-
mantling and before carrying out any other work! There is a risk of fatal injury! Ob-
serve the specifications in the work regulations! The operator must make sure that
the personnel have received and read the work regulations!
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