Miele PG 8504 Operating Instructions Manual page 46

Chemical processes and technology
Reaction between process chemicals and soiling
Problem
Natural oils and fats can be emulsified with
alkaline process chemicals. 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 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).
46
How to resolve it
Regular
– Select the
– Depending on application use de-foaming
agents that do not contain silicone oils.
– With a cold water connection use the
Extended
program (cold water pre-wash).
– With a hot water connection pre-treat the
load as necessary.
– Please observe the instructions of the
manufacturer of the process chemicals.
Extended
or program.