WARNING:
Never expose eyes or skin to UVC light from any source. Looking directly at the UVC light may cause permanent eye damage
or blindness.Never operate the Duo-2000 Air Purifying System out of the plenum. Avoid touching the glass portion of the lamp with your hands.
Page 8 of 12
P/N 46638600 09/18 Rev E
HONEYCOMB AND CARBON REPLACEMENT
If there is a need to replace the Pro-Cell honeycomb or carbon media, the subsequent procedure should be
followed.
WARNING:
WARNING:
Make sure power is disconnected from the unit before removing the unit.
Make sure power is disconnected from the unit before removing the unit.
NOTE: Wear disposable non-absorbent protective gloves prior to replacement procedure in case of accidental
breakage of glass.
1. Disconnect the Duo Model from any power source. Look through the round sight glass hole and verify the
UV lamp is off before removing the unit from the duct or Ductboard Adaptor Plate. There should be no
blue glow along the length.
2. Remove the (2) Phillips head screws on the left and right hand side of the front electrical cover and
remove the cover.
3. Detach the unit from the duct or Ductboard Adaptor Plate by removing the four sheet metal screws. Save
the sheet metal screws for reattaching the unit. Carefully slide unit out of duct.
4. Remove the lamp with the following steps. Disconnect the ballast from it by unplugging the connector, see
Figure 3. Loosen lamp clip and slide through the front end of the unit, see Figure 2. Be careful no to break
lamp.
5. Unscrew the end bracket by removing the hex screws, See Figure 7. Save the hex screws for reattaching
the end bracket. The end bracket is located on the opposite side of the Model than the power source.
6. With the end bracket taken off, the Pro-Cell honeycomb and carbon media can be slid out of the opening
in the back of the unit, see Figure 8. The honeycomb panel and the carbon media insert must be removed
together even if only one needs replacing.
6. Replace any removed pieces of either Pro-Cell honeycomb or carbon media with the specifi ed replacement
parts only. When sliding the replacement pieces back into the unit, check and make sure the Pro-Cell
honeycomb is placed on the inside while the carbon media is touching the outside side panel.
7. Once the replacements are slid all the way into the opening, attach the end bracket with previously
removed hex screws.
8. Carefully insert the lamp through the grommet on the front end of the unit. Re-attach the lamp clip by
tigthening down on the plastic end cap of the lamp. Re-attach ballast by plugging connector into the four
pins of the lamp. Use a cotton cloth with isopropyl alcohol and gently clean surface of lamp.
9. Insert Duo unit back into duct opening and attach to duct or Ductboard Adaptor plate using the four sheet
metal screws that were previously removed. The V shape of the Duo unit should face into the panel, see
Figure 5. Replace Front electrical cover and plug the quick connect power cord back into the unit.
10. Look through the round sight glass hole and verify the UV lamp is lit. There should be a blue glow along
the length. If the lamp is not lit, follow the Troubleshooting guide.