Labconco FilterMatPortable Exhausters 3970024 - Manual (Page 36)

32
Chapter 5: Maintaining Your FilterMate
Product Service 1-800-522-7658
Determination of when to Replace
HEPA Filters
The HEPA filters in the FilterMate gradually accumulate airborne
particulate matter and powders from the enclosure and room. The
rate of accumulation will depend upon the cleanliness of the room
air, the amount of time the enclosure is operating, and the nature of
work being done in the enclosure. In typical installations and
usage, the HEPA filters will last two to five years before requiring
replacement. Replace HEPA filters when face velocity drops
below the recommended 60-80 fpm velocity, and the speed control
is adjusted to full speed.
Install a New HEPA Filter with the
Bag-In/Bag-Out Procedure
See Figures 3-3, 3-4, 3-5 and 5-1 for the Bag-In/Bag-Out
Procedure. For your safety, wear appropriate personal protective
equipment during the change of HEPA filters. (Consult your
Safety Officer before performing filter changes).
1. With the FilterMate OFF, remove the rear cover panel
supported by four screws.
2. Remove the retaining strap on the bag and extend it out.
The retaining strap provides an extra level of safety while
running even though the FilterMate is under negative
pressure.
3. Loosen the two filter clamp bolts securing the HEPA filter.
4. Place both arms in the rear gloves of the bag, and carefully
draw the HEPA filter out of the FilterMate. Rest the HEPA
filter on the floor, table or cart. Remove arms from bag
gloves.
5. Create two seals between the FilterMate bag access port
and the old HEPA filter. Seals can be heat sealed or sealed
with tie wraps. Cut off the bag between the two seals and
leave the bag stub on the access port to the FilterMate.
6. Place the new HEPA filter in the new bag. Then place the
new bag and new HEPA filter over the old bag stub and
onto the FilterMate access port.
7. Carefully remove the old bag stub using the single glove
near the access port. Reattach the retaining strap on the
perimeter of the new bag at the FilterMate access port.
Draw the old bag stub into the single glove and turn the
HEPA
HEPA