Miele PG 8581 Operating Instructions Manual page 42

Chemical processes and technology
Soiling
Problem
The following substances can lead to heavy
build-up of foam during washing and
rinsing:
- some disinfection agents, cleaning
detergents, etc.
- active foaming agents such as surfactants
The following substances can cause
corrosion to stainless steel in the wash
cabinet and the accessories:
- hydrochloric acid
- other substances containing chlorides,
such as sodium chloride
- concentrated sulfuric acid
- chromic acid
- particles of iron and shavings
Reaction between process chemicals and soiling
Problem
Soiling containing high protein levels, such
as blood, can cause a heavy build-up of
foam when processed with alkaline process
chemicals.
Non-precious metals such as aluminum,
magnesium, and zinc can release hydrogen
when processed with very acidic or alkaline
process chemicals (oxyhydrogen reaction).
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How to resolve it
- Thoroughly rinse items in water
beforehand.
- Select a cleaning program with at least
one short pre-rinse in cold or hot water.
- Thoroughly rinse items in water
beforehand.
- Put the drip-dry items to be washed into
the mobile units, baskets, modules, and
inserts and start a reprocessing program
as soon as possible after placing in the
wash cabinet.
How to resolve it
- Select a cleaning program with at least
one short pre-rinse in cold water.
- Please observe the process chemical
manufacturer's instructions.