Fumigation Procedure – 2.6
Switch off the cabinet fans by pressing the green button ‘A’ on the control panel.
For re-circulating type safety cabinets, a fumigation extract kit (Optional Kit) should be
fitted to the cabinet discharge. Ensure the manual damper or blanking plate is fitted
and fully closed, this prevents any fumigant leakage from the cabinet discharge during
fumigation. For cabinets connected to a duct system proceed as follows:
Fill the formalin vaporiser with the correct amount of Formalin (see section 2.5
for quantities) and screw on the aluminium cap – finger tight, having checked
the gasket in the cap is undamaged. If the vaporiser is free standing, place on
the cabinet work tray, plug into the cabinet internal socket and switch on.
Press the DOWN button on the control panel and drive the sash to the fully
closed position. Fumigation wedges are provided with each cabinet, these are
used to help provide additional pressure from the glass to the seal during
fumigation. The image shown below shows the fitting positions for the
fumigations wedges.
Now press the fumigation button `E’ and the display will show `FUMIGATION
IN PROGRESS’. A countdown timer will be shown directly below in minutes
e.g. `285 MINS`. During the first hour of the fumigation cycle the internal fans
(downflow fans) will cycle for 20 seconds at 20 minute intervals, this ensures
formaldehyde is well dispersed within the cabinet and through the HEPA
filters.
Warning
The cabinet should be left for a minimum of 6 hours, preferably overnight.
Note: Once the ‘fumigate’ button has been activated DO NOT SWITCH CABINET ON
until the cycle has been completed.
On completion the cabinet will display `FUMIGATION COMPLETE` and `READY TO
VENT`. When ready, press the fumigation button to exit the fumigation cycle and then
press the green button `A` to purge the cabinet of formaldehyde gas.
Ensure all laboratory personnel are aware that the
fumigation is taking place; appropriate warning
notices should be put on all doors entering the
laboratory and on the cabinet being fumigated.
To Next Page
Loading...
Need help?
General
