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By cleaning the surfaces of the exchanger pipes, the best possible heat exchange is
always guaranteed.
Figure 4.5: Tie-rods
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The frequency with which to perform the scraping operations depends, as in
the case of cleaning the glass, on the intensity of use of the apparatus. In
normal usage conditions (eight hours a day), we recommend this operation
be performed at weekly intervals.
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The operations described in this paragraph are the same for the AIR version
and for the IDRO version.