Harman® • P42i Owner’s Manual • 2023 -___ • 03/23
14
8742-900A
After the Heat Exchanger has been scraped, use the dust
brush supplied to remove any remaining fly-ash from the Heat
Exchanger as well as other areas throughout the firebox.
Figure 2.5.
Figure 2.5
Brush the firebox free of remaining Fly-Ash.
Figure 2.6
Cleaning the Burn Pot
-
• Vigorously scrape the top holed surface and sides of the
burn pot down to auger tube, as suggested in the Daily/
Weekly Maintenance Section.
• Use the supplied allen wrench to remove any build-up that
may have accumulated in the holes of the burn pot grate.
Simply push the allen wrench down through each hole
ensuring it is clear of any build-up paying attention not to
damage the igniter element in the process. Figure 2.6.
Disconnect the power to the unit before removing
cover.
DANGER
• Loosen the (2) wing thumb screws on the lower front angle
of the burn pot. Figure 2.7
• Lift off the clean-out cover to open the bottom clean-out
chamber. Figure 2.8
• Clean ash buildup from inside the chamber while cover
is off. Use the scraper to tap on the top front edge of the
burn pot. This will help knock pieces of ash, loosened by
the scraping process, down through the holes. It also helps
knock ash buildup from the igniter element and bracket.
Clean Ash Accumulation
Figure 2.8
Figure 2.7
Wing Thumb Screws
