Installation and operating instructions Wilo-Sevio AIR
65
START-UP
English
5.
In the third step, the water level must be increased to approx. 10 cm above the flange
connection of the air distributor / intake pipe. Check the air distributor as well as the
intake connection for tightness. Leaky spots must be fixed.
6.
To complete the test, check the drainage line. To do this, open the valve on the drainage
line. If the aerator system is tight, only air or an air/water mixture may escape.
7.
After the test is complete, a retest must be conducted after 24 hours. The system can
only be placed into operation if this test also results in no faults.
After the second function test is completed successfully, the operating area must be
flooded.
If it is not yet possible to place the system into operation, provision must be made
to ensure a water level >1 m. In this way the disc aerators are protected from falling
objects and the membranes are protected from UV light.
Before the system is placed into operation at a later point in time, an additional function
test must be conducted. The relevant maintenance measures in accordance with the
“Maintenance” section must be taken into account starting at this point.
6.2.
Before switching on
•
Check the operating area to ensure that it is completely flooded.
•
If the start-up procedure was not yet conducted in full, an additional function test must
be conducted.
6.3.
Starting up the aeration
After the function test has been successfully conducted, the system can be placed into
operation. For this the aeration is switched on using a separate, customer-provided
control station. It is standard that a differentiation is only made between the operation
-
al states of On and Off.
Additional operational states such as intermittent operation or time-based control must
be arranged on an individual basis.
6.4.
After switching on
During operation, check the formation of air bubbles on the surface of the liquid on a
regular basis. If individual aerators or entire aerator groups fail, you can recognize this
from the appearance of the bubbles.
We also recommend checking the air inclusion into the aeration system using a ma
-
nometer in the intake line. The pressure in the intake line changes due to deposits (the
pressure increases) or defects (the pressure falls).
Note that when there is a pressure increase of 20 mbar, the maintenance measure
“Cleaning the membrane surface” must be carried out. The highest permitted pressure
increase in the system is 50 mbar. Higher deviations can damage the disc aerators.
Summary of Contents for Wilo-Sevio AIR
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