Baker SterilGARD SG303 Operator's Manual

Contents

Baker SterilGARD SG303 Operator's Manual Manual pdf 27 page image

25Replacing the HEPA FiltersWhen the certifier can no longer set the cabinet air flows to within 5 FPM of the nominal set point byadjusting the speed control or the damper, the filters must be replaced. If the filters are damaged, theywill also need to be replaced.Before any seal panels are removed, the cabinet should be decontaminated. Please see “DecontaminationProcedure” in Section III Proper Cabinet Use for specifics on decontamination. The filters are sure tohave collected microorganisms and other potentially harmful particles generated in the work area duringtheir lifetime, and maintenance personnel should not allow themselves to be exposed. It should also beremembered that a specific gaseous decontamination may work against microorganisms, but not againstchemical agents. Where chemicals are present, consult an industrial hygienist or other qualified person.A chemically contaminated filter must be handled with caution. Clothing and/or breathing apparatusshould be used to protect personnel as necessary to reduce the hazard. It is advisable to seal thecontaminated side of the filter by taping a plastic sheet or cardboard over the face before removal. Thisshould minimize the number of particles shaken loose from the filter. Once removed, the filter shouldimmediately be sealed in a chemical hazard bag and then disposed of safely in accordance withenvironmental regulations.After filter replacement has been completed, the cabinet and the room should be cleaned anddecontaminated in a manner consistent with the nature of the hazardous material. The cleaning materials,along with the protective gear and clothing, should be properly disposed.HEPA filters are very easily damaged, and you will want to use great care in handling so as to avoidinjury to the filter media and gasket surfaces. When installing the new filters, it is a good idea to tape apiece of cardboard over the filter media to give protection against dropped wrenches or misdirectedfingers. Of course, you'll need to make sure that the cardboard is removed before the access panels arere-installed. Inspect the filters carefully before and after installation. A broken or damaged filter isworthless.For detailed instructions on changing the filters, see the following two sections.Changing FiltersWarning!Decontaminate the unit before changing filters.1. Lower the sash to the fully closed position.2. Disconnect the tygon tube from the back of the mag gauge and lift off the outer closure panel.3. Remove the canopy locking fasteners inside the inner closure panel and then lower the canopy.4. Remove the front dress panel by removing the two bolts at the top and loosening the two bolts at thebottom.