Chemical Processes And Technology - Miele PLW 8616 Operating Instructions Manual

In this section you will find a description of the causes of common chemical reactions
which can occur between different types of soiling, chemical agents 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 (seals and hoses) and plastic
components in the machine are damaged,
this can lead to, for example, swelling,
shrinking, hardening or brittleness of mater-
ials, causing tears and cracks to develop.
Components cannot function correctly and
this generally leads to leaks.
A heavy build-up of foam during the pro-
gramme sequence will impair the cleaning
and rinsing effect on the load. Foam escap-
ing from the wash chamber can cause
damage to the machine.
When foam develops, the cleaning process
is not standardised and can not be valid-
ated.
Corrosion to stainless steel in the wash
chamber and to accessories can give them
a different appearance:
- Rust (red marks/discolouration)
- Black marks/discolouration
- White marks/discolouration (etched sur-
face)
Corrosive pitting can lead to the machine
not being water-tight. Depending on the ap-
plication, corrosion can affect cleaning and
rinsing results (laboratory analysis) or cause
corrosion to stainless steel load items.

Chemical processes and technology

Measures
- Determine and remedy the cause 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 cause of the
foam build-up
- Check the process used regularly to mon-
itor foaming levels
See also the information on "Process
chemicals", "Soiling" and "Reaction
between process chemicals and soiling" in
this section.
- Determine and remedy the cause of cor-
rosion
See also the information on "Process
chemicals", "Soiling" and "Reaction
between process chemicals and soiling" in
this section.
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