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8
MAINTENANCE
8.1
CLEANING
Substances with a distict polar character, such as alcohols, concentrated mineral acids, formic acid, phenol,
m-cresol, tetrahydrofuran, pyridine, dimethylformamide and mixtures of chloroform and methanol must
not be in the cleaning water.
These substances can chemically attack the plastic parts, which can lead to brittleness or even fractures.
These kinds of cleaners must therefore not be used!
8.2
WARRANTY AND SERVICES
Regular inspection and routine servicing are indispensable in order to continue to achieve a successful pro-
cess for many years after the unit is put into service.
In the building services sector this is covered by DIN EN 806-5.
A maintenance contract is the best way to ensure a good operating function beyond the warranty period.
Wherever possible, the regular servicing work and supply with consumables and wearing materials, etc.
should be carried out by the specialist trade or the factory’s customer service department.
Use only clear, clean drinking water to clean the housing and the transparent filter
bowl.
Domestic all-purpose cleaners and glass cleaners, solvents, solvent vapours, lac-
quers and alcoholic cleansing agents lead to brittleness and formation of surface
cracks or even fracture of the plastic parts.
In order to comply with the legal warranty claim, it is necessary that backwashing
takes place according to the existing operating conditions (see chapter 7.4
“BACKWASHING INTERVAL”).
DIN EN 13443-1 specifies that backwashing must take place at least every six
months.
However, we recommend to carry out backwashing every two months!
Further, an annual check of the set discharge pressure at the pressure gauge
(visual check) when no water is flowing and at the peak flow (large amount drawn
off) is necessary.
