Chemical Processes And Technology; Chemical Reactions - Miele G 7825 Operating Instructions Manual

Chemical reactions

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 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
materials leading to 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 washer-disinfector.
Cleaning processes cannot be regulated
where there has been a build-up of foam.
Corrosion to stainless steel of the wash
cabinet and to accessories has various
appearances:
– rust formation (red spots / stains),
– black spots / stains,
– white spots / stains (smooth surface is
slightly corroded).
Corrosive pitting can lead to the washer-
disinfector 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.

Chemical processes and technology

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".
– Find and correct the cause of foaming.
– The process must be checked regularly in
order to detect any foaming.
See also the information on "Process
chemicals", "Soiling" and "Reactions
between processing chemicals and soiling".
– Find and correct the cause of corrosion.
See also the information on "Process
chemicals", "Soiling" and "Reactions
between processing chemicals and soiling".
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