Page
14
Annual Maintenance
To maintain optimal performance, complete this maintenance procedure every 18
months, every 6800 hours of operation, or as indicated by maintenance monitoring
devices (magnehelic gauge shows “CHANGE HEPA” or UV status light is not
illuminated).
Supplies required: (no tools required)
• Service key
• Operator's key
• Pre-filter (Part #: 14-6010)
• HEPA main filter (Part #: 14-6009)
• UV light bulb* (Part #: 09-6005)
• 7/16-inch wrench or ratchet (for models purchased prior to Feb. 1996)
• Three sealable plastic bags for disposal of old pre-filter, HEPA filter, and UV
light bulb**
• Spray disinfectant (15% bleach solution or medically acceptable spray)
• Clean, soft cloths
• Personal protection
•
Note:
Be sure to replace the UV light bulb on an annual basis. Even if the bulb still
lights, it loses intensity (and thus effectiveness) after about 8,000 hours of operation.
Annual Maintenance Procedure:
1. Put on an appropriate facial respirator, gown, and gloves. Observe all other
pertinent safety measures and protocols.
2. If the unit is running, insert the operator's key in the key switch and turn the key to
the OFF position and tag out.
3. Unplug the power cord from the electrical outlet.
4. Use the service key to unlock the four service locks on the front panel. Insert the
service key into each lock, push in against the spring, and turn the key 90°.
5. Remove the front panel.
6. Remove the old pre-filter as follows: Pull down on the pre-filter’s top edge to release
it from the tab, then pull it out as shown in the illustration. As you pull the pre-filter
out, slip the plastic disposal bag over the top of it. Work the bag down over the pre-
filter as it is being removed.
7. Promptly close and seal the plastic disposal bag.
