Doc no: M18 Issue no: 07 Created: 24/08/2009
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Appendix I.
Fitting or Replacing the Main Carbon Filter
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Switch off the cabinet and disconnect power supply
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Reduce the sash to its lowest opening.
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Unscrew the main front cover panel by removing the Allen screws to expose the main
filter housing aluminium cover plate, ensuring that the lighting plug is disconnected. If
possible have an assistant support the cover while this is done.
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Loosen screws and remove cover plate by sliding it up and out of the keyhole slots.
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Carefully unpack the new Activated Carbon or HEPA filters
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Remove the old carbon or HEPA filters and immediately place them into the plastic
bags - seal and tape them for secure disposal.
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Place the replacement filters as required into the filter location.
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Ensure that the knurled nuts are securing the filters are fastened securely.
Good filter seating is essential for optimum performance.
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Replace the both the front cover panels and tighten down the screws with a 3mm
Allen Key, ensuring the light plug is reconnected.
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Following filter replacement it is recommended that the filter monitoring procedure
detailed in the Operational Safety Manual is performed. This ensures correct seating
and that satisfactory workstation performance has been verified.
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Written records of filter monitoring are a legal requirement under
COSHH.
