Chemical Processes And Technology - Miele PG 8591 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
Efficacy
If elastomers (hoses and seals) and plastics
in the cleaning 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
programme sequence will impair the
cleaning and rinsing effect on the load
items. Foam escaping from the wash
cabinet can cause damage to the cleaning
machine.
When foam develops, the cleaning process
cannot be guaranteed to be standardised
and validated.
Corrosion to stainless steel in the wash
cabinet and to accessories can have
various appearances:
- Rust (red marks/discolouration)
- Black marks/discolouration
- White marks/discolouration (etched
surface)
Corrosive pitting can lead to the cleaning
machine not being water-tight. Depending
on the application, corrosion can affect
cleaning and washing results or cause
corrosion of (stainless steel) load items.
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Measures
- Determine and remedy the causes of the
damage.
See also the information on "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 "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.