Miele G 7883 Operating Instructions Manual page 28

Chemical processes and technology
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 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
– Where available use the "OEL"
programme.
– 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.