Miele G 7883 Operating Instructions Manual page 27

Soiling
Problem
The following substances can
damage elastomers (hoses and
seals) and plastics in the lab washer:
– 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 on accessories:
– Hydrochloric acid,
– other substances containing
chlorides such as sodium chloride
etc.,
– concentrated sulphuric acid,
– chromic acid,
– Particles of iron and swarf.
Chemical processes and technology
How to resolve it
– Refit the lab washer with oil resistant
elastomeres, provided by Miele Ser-
vice.
– Depending on usage wipe the lower
door seal on the lab washer
periodically with a lint-free cloth or
sponge.
Clean the wash cabinet and
accessories without a load using the
ORGANICA programme.
– Prepare the load
using the "OEL" programme (where this
is available) or use a special
programme that dispenses emulsifiers.
– Thoroughly rinse items in water
beforehand.
– Select a cleaning programme with at
least one short pre-rinse in 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.
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