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Chapter 6: Maintaining Your Filtered Enclosure
• Measure of Line Voltage and Current
• Smoke Test to determine proper airflow patterns
• Lighting Intensity Test (when appropriate)
• Noise Level Test (when appropriate)
• Vibration Test (when appropriate)
Fluorescent Light Replacement
1. Disconnect the power.
2. Locate the small light reflector located under the control
panel shown in Figure 6-2 and Figure 6-3.
3. Remove the light reflector support by removing two
Phillips screws on the bottom of the light reflector.
4. Rotate and remove the old fluorescent lamp.
5. Reinstall the new fluorescent lamp and light reflector in
reverse order.
6. Power the unit up and try the new fluorescent lamp.
Motorized Impeller Replacement
The motorized impeller must be replaced as a complete unit.
When the motorized impeller is replaced, the capacitor may also be
replaced. See Appendix A for Replacement Parts Diagram. See
Figure 6-5 for an isometric view of the motorized impeller plenum
assembly. The HEPA filter rests on top of the motorized impeller
assembly.
1. Wear appropriate personal protective equipment to
decontaminate the filtered enclosure and then unplug from the
electrical outlet.
2. Remove HEPA filter per the HEPA filter removal procedure
outlined in this chapter.
3. Consult the wiring diagram in Appendix C of the manual and
disconnect all the wires of the motorized impeller. Be sure to
connect wires on the new motor in the same way the old motor
was wired.
4. Remove four screws in the motor bracket that hold motor
bracket to the supports with the vibration isolation mounts.
Remove the motor and bracket.
WARNING: High-speed blower. Never operate
impeller with housing off.
5. Replace the capacitor with a new one of equal voltage and
capacity.
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XPERT
FILTERED
BALANCE
SYSTEM