Stamoclean CAT430
Maintenance
Hauser
25
7
Maintenance
7.1
Maintenance activities
All maintenance activities that have to be carried out during normal operation are described below.
7.1.1
Cleaning the filter elements
1.
Please switch the controller off first (middle switch on the connection box) and then pull the
entire filter unit out of the water by the plastic rope.
2.
Hang the chain up on the rail or another suitable place so that you prevent the filter unit from
falling back into the basin.
3.
Now wash down the filter membranes with a water hose. The cleaning effect can be seen
when the brownish coating dissolves from the bright membrane surface.
"
Caution!
It is best to use a garden hose with a spray nozzle to wash down the filter elements. If a firehose is
used, set the stream somewhat wider in order to avoid damaging the filter elements.
4.
If no water supply is available, a high-pressure cleaner with water canister can also be used to
wash down.
5.
After washing down, check whether the membrane is damaged.
6.
Finally, lower the filter unit back into the basin by the chain. Ensure that the filter elements
are completely under the water level again.
Normally, no chemicals are required for cleaning the filter elements. At measuring points with a
high grease and protein content, however, it can be necessary to treat the membranes from time to
time with a mixture of 200 ml (6.8 fl.oz.) 30% H
2
O
2
, 1 l (34 fl.oz.) water and 30 ml (1 flo.oz.)
concentrated HCl.
#
Warning!
Highly corrosive!
Be sure to wear protective gloves and protective goggles when handling hydrochloric acid (HCl) and
hydrogen peroxide (H
2
O
2
).
1.
Wash the filter elements down first with water.
2.
Then spray the solution onto the filter elements with a plastic watering can with spraying
nozzle.
3.
Repeat the procedure three times at intervals of 5 minutes.
"
Caution!
Ensure that the filter membranes do not dry out because otherwise they will be irreparably
destroyed!
4.
Then wash the filter elements down again with water and lower the filter unit into the basin
again by the rope.
The time interval between two rinses depends to a great extent on the condition of the wastewater.
It can be assumed that the service life of a normal working sewage treatment plant is at least 6
weeks, if the operating time of the pump compared to the values in the table in chapter "Local
operation/Cycle times" is not considerably increased. In summer, however, it can even be a number
of months.
7.1.2
Storage of filter elements
The membrane of new PES filter elements and of all used filter elements must be kept wet.
Use the optional transportation box (--> accessories) to store filter elements safely.
