Miele PG 8583 Operating Instructions Manual page 48

Chemical processes and technology
Soiling
Problem
The following substances cause corrosion
to stainless steel in the wash cabinet and to
accessories:
– hydrochloric acid,
– other substances containing chlorides
such as sodium chloride etc.,
– concentrated sulphuric acid,
– chromic acid,
– particles of iron and swarf.
Reaction between chemical agents and soiling
Problem
Natural oils and fats can be emulsified with
alkaline chemical agents. This can lead to a
heavy build-up of foam.
Soiling containing high protein levels such
as blood can cause a heavy build-up of
foam when processed with alkaline
chemical agents.
Non-precious metals such as aluminium,
magnesium and zinc can release hydrogen
when processed with very acidic or alkaline
chemical agents (oxyhydrogen reaction).
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How to resolve it
– Thoroughly rinse items in water
beforehand.
– Drip dry items to be processed and then
place into their mobile units, baskets,
modules and inserts. Start the programme
as soon as possible after placing them in
the machine.
How to resolve it
Oil programme
– Use the
– This special programme dispenses
emulsifiers (pH neutral) in the pre-rinse.
– Depending on application use de-foaming
agents that do not contain silicone oils.
– Select a cleaning programme with at least
one short pre-rinse in cold water.
– Please observe chemical agent
manufacturer's instructions.
.