HTC 80 iD, Manual

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Machine description HTC 80 iD
8 1.1
3.3 Dust extractor
When the air enters the vacuum tank (pos 2 Figure 3-1, page 8 ) the speed reduces,
so the remaining dust in the airflow falls down into the Longopac. The airflow then
passes a first filter step that consists of a number of sock filters that sit in the filter
holder (pos 1 Figure 3-1, page
8 ).
To obtain a degree of cleanliness that complies with HEPA13, the airflow passes
through 2 HEPA filters (pos 5 Figure 3-3, page
10 ) before it passes the side duct fan
(pos 2 Figure 3-3, page 10 ) and streams out through the exhaust (pos 5 Figure 3-2,
page 9 ). A hose can be connected to the exhaust to lead the exhaust air away, for
example to reduce noise and any smells (Connection of hoses to the dust extractor,
page
19 ).
To prevent the Longopac from being sucked into the vacuum cleaner, it is equipped with
a pair of dust covers that close during operation. These sit in the bottom of the vacuum
cleaner on a level with the Longopac holder (pos 3 Figure 3-1, page
8 ).
To prevent too great a negative pressure in the vacuum system, there is a negative
pressure limit valve (pos 6 Figure 3-3, page
10 ) mounted in the HEPA filter holder
(pos 7 Figure 3-3, page 10 ).
Figure 3-1. The front of the dust extractor