Labconco Nexus 533 0 Series User Manual page 71

The following tools are required to change the HEPA filter:
•
Phillips screwdriver
•
7/16" nut driver or socket and ratchet
1. The diffuser(s) must be removed. Locate and remove the 4 screws (8 screws for the
8FT units) as shown in Figure 8-3 using a phillips screwdriver. Save this hardware.
2. Tilt the top of the diffuser down (see Figure 8-3) and pull straight out of the clean
bench. Service fixtures installed along the side wall(s) may need to be removed prior
to removing the diffuser and HEPA filter.
3. Using a 7/16" nut driver or socket and ratchet, loosen the bolts trapping the HEPA
filter as shown in Figure 8-4. Do this on all clamps on both ends of the clean bench.
4. Using a 7/16" nut driver or socket and ratchet, remove the bolts and washers holding
the clamps in place. The left-hand clamps are shown in Top and Bottom Detail of
Figure 8-4. Be careful the filter does not tip towards the servicer when the top
clamps are removed. Save clamps and all removed hardware as it will be reinstalled
later.
Remove and
save screws
Tilt Forward and
pull out diffuser
71
Figure 8-3
Remove and
save screws