OM0303
Rev 5 July/2021
Page 49 of 108
7.2 LED Lamp Replacement
The two (T8) LED lamps are cool white and placed external to the cabinet to aid maintenance and minimize heat build-up
within the cabinet. The B70 life rating of the lamp is 50,000 hours based on 80,000 switching cycles.
To replace a lamp, it is necessary to remove the lamp assembly.
1. Switch Cabinet Light Switch off.
2. Remove the screws at each upper side of the Control Center and allow the Control Center to rotate down, resting
on the safety straps.
3. The lamp is now directly exposed for replacement.
4. The lamp is removed by displacing the lamp to one side against the compressible lamp holder and lifting out the
lamp.
5. Reverse the procedure to reinstall the lamp assembly being careful not to pinch the safety straps, cable or tubing
during closure of the control center.
7.3 Primary HEPA Filter Prefilter Replacement
The primary HEPA prefilters under normal usage and barring an accident (a puncture), do not need replacement until the
efflux velocity cannot be maintained or the access inflow velocity cannot be maintained at 100 LFPM (.51 m/s) (min.). This
may permit the average downflow velocity to be as low as 55 LFPM (.27 m/s), as long as no point falls below 20% of the
average downflow velocity.
If the above airflow requirements cannot be maintained use the following procedure to replace the primary HEPA
prefilters.
Sliding window should never be opened unless interior is known to be free of
hazardous drug residue or appropriate precautions are taken per facility Standard
Operating Procedures (SOP’S).
NOTE
: Cabinet should be on and running throughout the filter replacement process.
1. Using appropriate PPE, surface decontaminate or clean cabinet workzone interior including both sides of the
worktray.
2. Remove worktray from cabinet and be sure window is at nominal work height.
3. Remove protective screen from primary HEPA prefilter that is going to be replaced and set aside within workzone.
4. Bend and collapse the protective screen then discard the protective screen by inserting it into the used filter that is
to be replaced.
CAUTION
!
Summary of Contents for LabGard NU-581-400E
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