Labconco Purifie Horizontal Clean Benches 3970424 - Manual (Page 39)

Chapter 6: Maintaining Your Vertical Clean Bench
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Motorized Impeller Replacement
The motorized impeller must be replaced as a complete unit. When the motorized
impeller is replaced, the capacitor should also be replaced. See Appendix A for
Replacement Parts Diagram. See Figure 6-3 for an isometric view of the motorized
impeller plenum assembly. The HEPA filter rests below the motorized impeller
assembly.
Do NOT contact blower wheel while still in motion.
NE PAS être en contact avec la roué du ventilateur tant qu’il est
en marche.
1. Unplug the enclosure from the electrical outlet.
2. Remove HEPA filter per the HEPA filter removal procedure outlined earlier 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. The 3' and 4' enclosures have two
motorized impellers.
4. Remove four screws in each motorized impeller.
ATTENTION: High-speed blower. Never operate impeller
with housing off.
5. Replace each capacitor with a new one of equal voltage and capacity.
6. Reassemble each new motorized impeller by reversing the assembly steps.
7. Perform a HEPA filter leak check.
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