en Shut-down/dismantling
30 WILO SE 2019-01
Due to their design, centrifugal pumps have rotating parts that are easily accessible.
Depending on the operating condition, sharp edges can develop on these parts. WARN-
ING!This can lead to cuts and limbs may be amputated and severed! Check the fol-
lowing at regular intervals:
ƒ Operating voltage (+/-10% of the rated voltage)
ƒ Frequency (+/-2% of the rated frequency)
ƒ Power consumption between individual phases (max.5%)
ƒ Voltage difference between the individual phases (max.1%)
ƒ Max. switching frequency
ƒ Minimum water submersion depending on the operating mode
ƒ Inlet: no air intake
ƒ Level control device/dry-running protection: Switching points
ƒ Quiet/low-vibration running
ƒ All gate valves open
Operation in the limit range
The pump can briefly be operated in the limit range (max. 15min/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:
ƒ Operating voltage (+/-10% of the rated voltage)
ƒ Frequency (+3/-5% of the rated frequency)
ƒ Power consumption between individual phases (max.6%)
ƒ Voltage difference between the individual phases (max.2%)
8 Shut-down/dismantling
8.1 Personnel qualifications
ƒ Operation/control: Operating personnel must be instructed in the functioning of the
complete system.
ƒ Electrical work: A qualified electrician must carry out the electrical work.
ƒ 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
ƒ Locally applicable accident prevention and safety regulations of trade associations.
ƒ Observe regulations for working with heavy loads and under suspended loads.
ƒ Provide the necessary protective equipment and make sure that the personnel wears
it.
ƒ Provide adequate aeration in closed rooms.
ƒ 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:
ƒ 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!
ƒ 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!
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