Wilo Sevio AIR P, Инструкция по установке и эксплуатации

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Installation and operating instructions Wilo-Sevio AIR P 25
SHUTDOWN/DISPOSAL English
3. The water level must reach up to approx. 10 cm
above the diaphragm.
4. For the clear water test a loadingwith air within
the recommended operational range must be
present. With insufficient loading, the aerators do
not work properly.
5. Leaks are marked by air bubbles. Leaks must be
fixed and defective components replaced.
• Before they can be replaced, the water must be
pumped out completely, so that no water may
penetrate the pipework.
• If several aerators within a line only work inter-
mittently, water may have penetrated.
6. After finalising the test, another test must be
performed after 24 h. Only if no faults are de -
tected during this test as well, the system may go
into operation.
After the second function test was passed suc-
cessfully as well, the operating space may be
flooded.
If commissioning is not possible, a water level
of > 1 m (if risk of frost < 2 m) must be ensured.
This is to protect the aerator from falling ob-
jects and the diaphragm from UV light.
An additional function test must be performed
before a later commissioning. Furthermore, the
respective maintenance measures according to
the section “Maintenance and repair” must be
considered from that point in time.
6.2. Before switching on
• Check the operating space, if it is flooded com -
pletely.
• If the commissioning was not executed com-
pletely, an additional function test must be
performed.
6.3. Commissioning the aeration
After the function test has been performed suc-
cessfully, the system can be put into operation.
The aeration system is switched on using a sepa-
rate operating point provided by the customer. By
default, there is only a distinction made between
the operating states on and off.
Additional operating states, such as intermittent
operation or temporal control must be discussed
individually.
6.4. After switching on
Regularly check for air bubble formation on the
fluid surface during operation. If one aerator or
whole aerator lines fail, you can recognise it by
the bubble appearance.
We also recommend checking the air intake into
the aeration system using a manometer in the in-
let pipe. Deposits (pressure increases) or defects
(pressure decreases) cause a change of pressure
in the inlet pipe.
Note that a pressure increase of 20 mbar requires
performing the maintenance measure “Cleaning
the diaphragm surface”. The max. permissible
pressure increase in the system is 50 mbar. Higher
deviations may damage the aerators.
7. Shutdown/disposal
• All work must be carried out with the greatest
care.
• The required protective equipment must be worn.
• When working in basins, it is essential to comply
with the corresponding local protective measures.
• During any work, a second person must be pre-
sent.
• Lifting equipment in perfect technical condition
and officially approved lifting gear must be used
for lifting and lowering complete aerator fields.
7.1. Temporary decommissioning
For this type of deactivation, the aeration system
remains installed and is ready for operation at any
time.
During standstill, a min. water level of > 1 m (dur -
ing danger of frost > 2 m) must remain in the op -
erating space to protect the diaphragm. Further-
more, it must be ensured that the temperature in
the operating space and of the fluid does not fall
below +5 °C.
Furthermore, during standstill times, a 10 minute
test run with a loading of 10 Nm³/h must be
performed daily.
7.2. Decommissioning for maintenance work and/or
storage
The system must be switched off and secured
against being switched on again without permis-
sion. The operating space must be drained com-
pletely and cleaned. Work on removal and storage
can then commence.
When draining the basin, we recommend to keep
the aeration system in operation. This prevents
foul odours and deposits on the bottom of the
basin.
DANGER due to toxic substances!
During work in an environment hazard-
ous to health, e.g., in sewage or wastewater
treatment plants, there is an increased risk
due to bacteria and viruses. To mitigate the
increased risk, heed the following points:
• Open wounds must be cleaned and treated
immediately!
• Eating and drinking is strictly prohibited!
• Appropriate protective equipment must be
worn!
• Disinfect persons and tools when leaving the
unit!
7.2.1. Removal
Removal is done in the reverse order to installa-
tion:
1. Disassembling aerator line
2. Disassembling aerator
3. Disassembling inlet pipe