Miele G 7825 Operating Instructions Manual page 36

Chemical processes and technology
Soiling
Problem
The following substances can damage
elastomers (hoses and seals) and plastics in
the washer-disinfector:
– Oil, wax, aromatic and unsaturated
hydrocarbons,
– emollients,
– cosmetics, hygiene and skin care
products such as creams (analytical
applications).
The following substances can cause
excessive foaming during washing and
rinsing:
– agents such as disinfection agents etc.
– reagents for analysis, e.g. for
microtitration plates,
– cosmetics, hygiene and skin care
products such as shampoos and creams
(analytical applications).
– foaming substances in general, for
instance tensides.
The following substances can cause
corrosion of the stainless steel in the wash
cabinet and the accessories:
– hydrochloric acid,
– other substances containing chlorides
such as sodium chloride etc.,
– concentrated sulphuric acid,
– chromic acid,
– iron particles and shavings.
36
How to resolve it
– Depending on usage wipe the lower door
seal on the washer-disinfector periodically
with a lint-free cloth or sponge. Clean the
wash cabinet and accessories without a
load using the ORGANIC program (if
available).
– Prepare the load using the "OIL" program
(where this is available) or use a special
program that dispenses emulsifiers.
– Rinse the items with a sufficient quantity
of water before placing them in the
washer-disinfector.
– Select a wash program with one or more
short pre-rinses with cold or hot water.
– Depending on application use antifoaming
agents that do not contain silicone oils.
– Rinse the items with a sufficient quantity
of water before placing them in the
washer-disinfector.
– Let the load drip dry before putting it on
the carts, baskets and inserts and placing
in the washer-disinfector.