Miele G 7804 Operating Instructions Manual page 28

Chemical processes and technology
Soiling
Problem
The following substances can damage
elastomers (hoses and seals) and
plastics in the machine:
– oil, wax, aromatic and unsaturated
hydrocarbons,
– emollients,
– cosmetics, hygiene and care
products such as creams (analytical
applications).
The following substances can lead to a
heavy build-up of foam during washing
and rinsing:
– some disinfecting agents and
dishwashing detergents,
– reagents for analysis e.g. for
microtiter plates,
– cosmetics, hygiene and care
products such as shampoos and
creams (analytical applications),
– active foaming agents such as
tensides.
The following substances cause
corrosion to stainless steel in the wash
cabinet and on accessories:
– hydrochloric acid,
– other substances containing
chlorides such as sodium chloride
etc.,
– concentrated sulphuric acid,
– chromic acid,
– particles of iron and swarf.
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How to resolve it
– Refit the dishwasher with oil-resistant
elastomers.
– Depending on usage wipe the lower
door seal on the dishwasher
periodically with a lint-free cloth or
sponge.
Clean the wash cabinet and
accessories without a load using
programme B or C.
– When processing items, use
programmes B or C and dispense
additional powder cleaning agent on
the door.
– Thoroughly rinse items in water
beforehand.
– Select programme C (pre-cleaning
with cold or hot water).
– Depending on application use
de-foaming agents that do not
contain silicone oils.
– Thoroughly rinse items in water
beforehand.
– Place items drip dried into mobile
units, baskets and inserts and then
place these in the wash cabinet.