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3. Maintenance, Cleaning, Diagnosis
3.3 Stand-by
We recommend to keep the furnace head closed at all times. If the furnace head is open, there is a risk that the insulation
absorbs humidity and water droplets form by condensation during firing. This negatively affects the vacuum performance
and, consequently, the firing results. The furnace may only be transported with the furnace head closed.
Cleaning of the heating elements
The cleaning program (see Chapter 2.2.4.7) restores the chipped off oxide / protective layer on the heating elements. If no
even protective layer on the heating elements is noticeable after the cleaning firing, it may be necessary to run the cleaning
program several times in a row. The firing chamber must be empty for that purpose. Clean the firing chamber before
running the cleaning program.
Large parts of the protective layer on the left heating element have
chipped off. The heating element on the right side is in a sound,
stable condition and shows an intact oxide / protective layer. The
cleaning program must be repeated until the surface is free from
contamination and appears glassy.
Symbolic figure
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