DOCUMENT NO: M40 ISSUE NO: 3 ISSUE DATE: 11/07/18
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FILTER REPLACEMENT
DURING THE PRE-FILTER AND MAIN FILTER REPLACEMENT PROCEDURE, SUITABLE
PROTECTIVE CLOTHING (FACE-MASK, GLOVES AND SAFETY GLASSES) MUST BE WORN
PRE-FILTER REPLACEMENT
(SAFELAB RECOMMENDS THAT THE PRE-FILTER IS REPLACED EVERY THREE MONTHS)
1.
With the cabinet switched on, raise the hinged front window.
2.
Measure and take note of the distance from the front edge of the upper baffle to
the inside top of the fume cupboard and remove the thumbscrews supporting the
front of the upper baffle and allow in it fold down flat against the rear baffle.
3.
Undo and remove the thumbscrews retaining the pre-filter clamp frame a little and
remove the pre-filter by folding the front edge away from you so that it is folded
in half, withdraw it, then place and seal it directly into a plastic bag for disposal.
4.
Locate the new pre-filter on the clamp frame, raise into position, and replace and
tighten the retaining thumbscrews.
5.
Raise the upper baffle and refit the thumbscrews. Adjust to give the same distance
from the inside top as before.
6.
Lower the front window.
