Maintenance, Service, and Troubleshooting 6-9
3. Tilt and lift off the cover
leaving the five loosened
screws in place.
Replacing the Inline Filters
There are two HEPA sheath flow filters in the classifier: one upstream and
one downstream of the sheath flow blower. Although the sheath flow
blower is powerful enough to overcome significant pressure drop due to
loaded filters, the filters may need periodic replacement.
Note: Inside the classifier, IN and OUT are etched onto the main flow
manifold to indicate the direction of flow. In addition, the filter
manifold has arrows showing filter direction. Match these indicators
to the flow direction shown on the filter label when reinstalling filters.
To change the filters in the sheath air line, follow these instructions:
1. Power off the classifier.
2. Remove the cover from the classifier (see Removing the Cover).
3. Locate the filter manifold. Using your fingers, remove the two #10
wing nuts and #10 knurled stainless steel nuts.
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