Chemical Processes And Technology - Miele PG 8583 CD Operating Instructions Manual

Chemical processes and technology

In this section, you will find a description of the causes of common chemical reactions
which can occur between different types of soiling, process chemicals, and the
components of the machine, along with their remedies as necessary.
This section is intended as a guide. If unforeseen interactions occur during reprocessing or
if you have any queries on this subject, please seek advice from Miele.
General information
Problem
If elastomers (hoses and seals) and plastics
in the machine are damaged, for example
by swelling, shrinking, hardening or
brittleness of materials, tears and cracks,
components will not function correctly and
this generally leads to leaks.
A heavy build-up of foam during the
program sequence will impair the cleaning
and rinsing effect on the wash items. Foam
escaping from the wash cabinet can cause
damage to the machine.
When foam develops, the cleaning process
cannot be guaranteed to be standardized
and validated.
Corrosion to stainless steel in the wash
cabinet and to accessories has various
appearances:
- rust (red marks / discolouration)
- black stains / discolouration
- white stains / discolouration (etched
surface)
Corrosive pitting can lead to the machine
not being water-tight. Depending on the
application, corrosion can affect cleaning
and rinsing results (laboratory analysis) or
cause corrosion to (stainless steel) wash
items.
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How to resolve it
- Determine and remedy the causes of the
damage.
See also the information on "Associated
process chemicals", "Soiling", and
"Reaction between process chemicals and
soiling" in this section.
- Determine and remedy the causes of the
foam.
- Check the process used regularly to
monitor foaming levels.
See also the information on "Associated
process chemicals", "Soiling", and
"Reaction between process chemicals and
soiling" in this section.
- Determine and remedy the causes of
corrosion.
See also the information on "Process
chemicals", "Soiling", and "Reaction
between process chemicals and soiling" in
this section.