Chemical Processes And Technology - Miele PG 8593 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, processing 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 processing, or if
you have any queries on this subject, please seek advice from Miele.
General notes
Problem
If elastomers (seals and hoses) and plastic
components in the machine are damaged
for example, by swelling, shrinking,
hardening or brittleness of materials or the
development of tears and cracks,
components can then not function correctly
and this generally leads to leaks.
Heavy foaming during a program affects
cleaning and rinsing results. Foam escaping
from the wash cabinet can cause damage
to the machine.
Cleaning processes cannot be regulated
where there has been a build-up of foam.
Corrosion to stainless steel in the wash
cabinet and to accessories has various
appearances:
– rust formation (red spots / discolouration),
– black spots / stains,
– white spots / discolouration (etched
surface).
Corrosive pitting can lead to the machine
not being water-tight. Depending on
application corrosion can influence cleaning
and rinsing results (laboratory analysis) or
cause corrosion to stainless steel items in
the cabinet.
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How to resolve it
– Find and correct the causes of the
damage.
See also the information on "Process
chemicals", "Soiling" and "Reactions
between processing chemicals and soiling".
– Establish the cause of the foam and
rectify it.
– Check the process used regularly to
monitor foaming levels.
See also the information on "Process
chemicals", "Soiling" and "Reactions
between processing chemicals and soiling".
– Establish the cause of the corrosion and
rectify it.
See also the information on "Process
chemicals", "Soiling" and "Reactions
between processing chemicals and soiling".