Labconco XPert Weigh Boxes 5220331 - Manual (Page 38)

Chapter 6: Maintaining Your Glove Box
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Motorized Impeller Replacement
The motorized impeller must be replaced as a complete unit. See Appendix A
for replacement parts diagram.
1. Unplug the motorized impeller from the electrical outlet. Refer to
Appendix A for replacement parts.
2. Remove the hose connecting the exhaust HEPA filter to the motorized
impeller.
3. Remove the motorized impeller and support braces from the light and the
rear sheet metal façade.
4. Reassemble the new motorized impeller by reversing the steps above.
WARNING: High-speed blower. Never operate impeller
with housing off.
Speed Control Replacement
1. Disconnect the power and remove the cover behind the front control
panel where the speed control is located.
2. Remove the two fasteners holding the speed control. Refer to Appendix
A for replacement parts.
3. Disconnect all wires leading to the speed control. Connect wires on new
speed control in the same position as the old speed control.
4. Reassemble to the system in the same position and with the same
fasteners that were removed earlier.
Ionizer Fan Maintenance
1. To maintain optimum neutralization efficiency and operation, the ionizer
fan should be cleaned on a regular basis with the alcohol cleaners
provided or a swab wet with isopropyl alcohol.
2. The input power must be turned OFF before the unit is opened up for
maintenance.
3. The emitter electrodes (ionizer points) should be cleaned with the alcohol.
4. Unscrew the four screws on the back of the unit and remove the screen to
clean the emitter electrodes.
5. After cleaning, reinstall by reversing the steps above.
6. See Appendix D for additional information.
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