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Aeration

Air pump

Checking the air pump
The air pumps (V1-V2) supply the
aerators/stage 1 and 2 with air.
Note!
For maintenance and other work
on the air pump, observe the
information in the operating
instructions of the air pump
(Annex 1).
After the air pump has been switched
on, the substrate in stage 1 and 2 must
move evenly (after the running-in
phase has elapsed). Small dead spots
in the corners do not matter.
For checking, detach the transparent
connecting hose (see illustration) to the
pump.
If no or only little air current can be
noticed, check whether the sponge in
the pump is soiled and clean it if
necessary (to do so, remove the cover
of the pump).
Further possible sources of malfunction
are the air hoses (check the
connections are in order) and the
aerators in tanks 1 and 2. Check the
aerators and if necessary dismantle
and clean them.
Replacing the air pump:
Switch off the main switch.
Disconnect the connecting plug.
Detach the air hose.
Replace the air pump.
Fit the new pump in reverse order.
Check the function.
22
Operating Manual AC 3000-13500
Warning!
Mortal danger! Mains voltage
Before opening the air pump,
switch off the main switch and
disconnect the connecting
plug!
Make sure that the supply
voltage cannot be
inadvertently restored.
1
Air pump
2
Connecting hose
300108/AV/Draft

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