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SECTION 6—PREVENTIVE MAINTENANCE
29
Cleaning the Heat Exchanger
 DANGER
To prevent electrical shock, ALWAYS disconnect concentrator from electrical outlet 
before servicing.
NOTE: For this procedure, refer to FIGURE 6.6.
1. Unplug unit.
CAUTION
Use care not to deform heat exchanger when installing, removing or cleaning.
3. Remove excess dirt using compressed air or vacuum.
4. Reinstall cabinet. Refer to Cabinet on page 23.
FIGURE 6.6   Cleaning the Heat Exchanger 
Heat Exchanger