OPERATOR'S MANUAL - The Baker Company Blog

366D000M 1/4/2011A chemically contaminated filter must be handled with caution. Clothing and/or breathing apparatus shouldbe used to protect personnel as necessary to reduce the hazard. It is advisable to seal the contaminated side ofthe filter by taping a plastic sheet or cardboard over the face before removal. This should minimize the numberof particles shaken loose from the filter. Once removed, the filter should immediately be sealed in a chemicalhazard bag and then disposed of safely in accordance with environmental 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, alongwith the protective gear and clothing should be properly disposed.HEPA filters are very fragile, and you will want to use great care in handling so as to avoid damage to thefilter media and gasket surfaces. When installing the new filters, it is a good idea to tape a piece of cardboardover the filter media to give protection against dropped wrenches or misdirected fingers. Of course, you'll needto make sure that the cardboard is removed before the access panels are re-installed. Inspect the filters carefullybefore and after installation. A broken or damaged filter is worthless.For detailed instructions on changing the filters, see the following two sections.Accessing the down flow and exhaust filtersWARNINGOnly qualified technicians should perform this procedure.Decontaminate the cabinet before changing the filters.1. Decontaminate the cabinet and disconnect power.2. Close the viewscreen.3. Pull the bottom edge of the vertical dress panel out away from the cabinet. (Note: some models may havehardware fastening the panel to the front plate, remove as required.) Hinge the dress panel standoff downand lower the vertical panel on to it. Unplug tygon tube from the back of the magnehelic gauge. Firmlygrip the bottom edge of the vertical dress panel with both hands, slide the panel to the right and lift thepanel off the cabinet.4. Remove the light canopy locking fasteners inside the sloped dress panel and lower the canopy. Make surethe canopy support cables on each end are secured.5. Loosen the four lock nuts holding the electrical mounting board and carefully lift the board off. Lay itface down inside the light canopy. (No electrical connections should need to be disconnected)6. Disconnect the cable to the Sash Level Sensor then remove the two screws at the top of the sloped dresspanel. Lift the panel off the cabinet.7. Loosen each of the (10) 3/8” hex head bolts holding the front access panel. Be careful not to damage orlose the seal washer on each bolt when removing them. Remove the access panel. Be careful not todamage the panel gasket.8. You now have direct access to change the down flow and exhaust filters. (See Figure 18)38