KRAL DL3 Series, Operating Instructions Manual

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11 Maintenance
10.5 Recommissioning
Carry out the following measures during operation interruptions.
Scope of the operation interruption Measure
o Pump station shut down for longer period Depending on the pumped liquid
o
Pump station drained Close the pressure- and suction-side shut-off
devices.
o
Pump station dismantled Disconnect the motors from the power supply
and secure against being switched back on.
o
Pump station stored Observe measures for storing and preservation
Ä
Transportation, storage, Page 12.
Tab. 11: Measures during operation interruptions
Behaviour of the pumped li-
quid Duration of the operation interruption
Short Long
o
Solids sediment Flush the pump station. Flush the pump station.
o
Congealed/frozen
o
No corrosive burden
Heat or drain the pump sta-
tion.
Drain the pump station.
o
Congealed/frozen
o
Corrosive burden
Heat or drain the pump sta-
tion.
1. Drain the pump station.
2. Preserve the pump station.
o Remains liquid
o No corrosive burden
– –
o Remains liquid
o Corrosive burden
– 1. Drain the pump station.
2. Preserve the pump station.
Tab. 12: Measures depending on the behaviour of the pumped liquid
Drain the pump station via the pressure line, suction line, vent screws and screw plugs.
10.5 Recommissioning
10.5.1 Recommissioning the pump station
Carry out all the steps as for the commissioning process,
Ä
Commissioning, Page 20.
11 Maintenance
11.1 Dangers during maintenance
The following safety instructions must be observed strictly:
o
Have all work carried out only by authorized qualified personnel.
o
Before beginning work, let the pump station cool down slowly to the ambient temperature. Avoid
rapid temperature changes.
o
Pumped liquids can be hot, poisonous, combustible and caustic. Use corresponding protective
equipment.
o
Collect any discharging pumped liquid safely and dispose of it in an environmentally compatible
manner in accordance with the applicable local regulations.
o Ensure that the collection tank for discharging pumped liquids is sufficiently large.
o Observe the operating instructions and data sheets of the components.
Operating instructions OID 06en-GB Edition 2019-11 25