Step 4: Insert the filter seal locking handle into the locking channel so that the locking
handle support tab protrudes completely through the hole in the locking handle.
Step 8: Again, repeat the process on the left and right hand side panels of the FAH
housing until each row of half-cassettes is locked in position at both sides. As before,
the handle on the left hand side of the panel always rotates downwards and the handle
on the right hand side of the panel always rotates upwards.
Step 5: Making sure that the locking handle is hooked behind the front flange of the
locking handle support tab and cannot slip off, rotate the locking handle downwards so
that the face of the handle engages the web of the channel forcing it against the
cassettes and pushing them into the housing to compress the face gasket.
Step 7: Now, repeat the process on the right hand side of the center vertical cassette
support panel. The handle on the right hand side of the panel rotates upwards.
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Step 6: Rotate the locking handle until it is completely seated with the handle in the
vertical position. The locking handle is self positioning and cannot be over-rotated.
