Manual

Chapter 4: High Performance Features & Safety Precautions

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12. Speed Control (Integral Blower Models Only) regulates the speed of the

motorized impeller and is used by the certifier to validate and adjust the

inflow velocity. It is located behind the upper light assembly. See Figures

4-2 and Figure 3-4.

13. Space-Saving Design increases effective laboratory workspace, because

the impeller and carbon filter are self-contained on integral blower models.

On remote blower models, the interior space is increased to 23" interior

depth vs. 17.19" for integral blower models. See Figure 4-1.

14. Sash. The sash is constructed of 1/4 inch tempered safety glass. It pivots

up for loading and cleaning. See Figures 4-1 and 4-2.

15. Control Panel. The control panel, which is located above the sash,

contains the control switches and the electronics. See Figures 4-1 and 4-2.

16. Lamp Ballast (Not Shown) for the fluorescent lamp is located behind the

control panel.

17. Accessory Work Surface is dished and contoured to fit the dimensions of

the enclosure to contain spills. For histology/pathology applications, a wet

chemistry work surface is available with a sink and valves. See Chapter 7.

18. Carbon Filters (for Integral Blower Models Only) are necessary on

integral blower models. Carbon filters are designed to remove small

amounts of noxious fumes and chemicals. The carbon filters are supported

behind the perforated baffle. Two carbon filters are required. Carbon

filters are listed in Chapter 7. See Figure 4-2 and Figure 6-4.

19. Accessory Exhaust Connection Kits (For Remote Blower Models Only)

are available to duct to the outside. The exhaust connection allows the

operator additional protection from hazardous fumes or vapors and should

always be used if carbon filters capacity are not appropriate for your

application. See figures in Chapter 3 and Chapter 7 to order.

20. Utility Shelves (not shown) allow the user to hold utensils and printers on

shelves inside the enclosure. See Chapter 7.

Safety Precautions

1. Although the enclosure has been engineered to maintain optimum operator

safety, caution should always be used while working. Prior to using the

enclosure, check to make sure that the exhaust blower is operating and that

air is entering the enclosure at its specified face velocity. The use of an

airflow monitor is recommended to alert the user to a problem with airflow.

2. Use good housekeeping in the enclosure at all times. Clean up spills

immediately. Periodically clean enclosure interior.

3. Do not overload the work surface with apparatus or work material. The safe

operation of the enclosure is based upon having proper airflow through the

structure. Do not place large objects directly on the work surface. Instead,

elevate the object 3/4" on blocks to allow a flow of air under the object and

into the rear baffle exhaust slots. Ensure blocks are level and secured in place.