Labconco Biological Safety Cabinets 34610 Series - Manual (Page 17)

Chapter 3: Getting Started
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Exhaust System Requirements
The cabinet exhaust stack is sized to accept 10-inch (254 mm) stainless steel
ductwork. The exhaust system’s blower should be sized to handle the
exhaust volume of each cabinet, as shown in the QuickCharts, Appendix E.
The exhaust system must maintain a static pressure equal to or greater than
the system pressure, plus 1.5 inches (38 mm) of water for the Logic cabinet.
In order to get the maximum life out of the cabinet’s exhaust filter, the
system needs to be able to operate at an additional 2.0 inches (51 mm) of
vacuum, compared to the initial total system pressure.
NOTE: The exhaust system should be fitted with a backdraft damper
(Part #3858800) to prevent the reversing of airflow in the system.
LABCONCO MANUFACTURES EXHAUST BLOWERS AND A
BACKDRAFT DAMPER, WHICH ARE SUITABLE FOR MOST SINGLE
CABINET INSTALLATIONS. THE REMOTE BLOWER IS DISCUSSED
FURTHER IN APPENDIX D.
Drain Valve Installation
In order to prevent damage during shipping, the drain valve assembly has not
been installed. If desired, the valve should be installed after the Cabinet is in
its final location.
To install the valve assembly, follow these steps:
Note: The work surface is heavy. Use caution when handling it.
1. Lift the work surface out of the Biosafety Cabinet by lifting on the knobs
at the front of the work surface. Steady the work surface while pulling it
straight out the front of the cabinet.
2. Using a putty knife, remove and discard the stainless steel cover that is
sealed over the drain mounting holes. Scrape out remaining sealant that
is around the holes.
3. Apply a light coating of silicone sealant (user supplied) to the mounting
surface of the drain assembly. Attach the drain assembly under the
bottom of the cabinet as shown in Figure 3-4. Wipe off any excess sealant
from the cabinet bottom. Ensure that the center drain hole is
unobstructed.
4. Make sure the drain valve is in the closed position.
5. Reinstall the work surface.
6. Allow the silicone sealant to cure for at least eight hours before exposing
it to liquid.