Harman®  •  Accentra 52i Owner’s Manual_R8  •  2013 -___  •  07/1420 3-90-00574c
Figure 5.5
Removing the Center Medallion
1.  Lift up on the 2 bottom corners of the medallion until it is 
higher than the top of the ame guide.
2.  Pull the bottom edge of the medallion front approximately 
1 inch.
3.  Pull downward on the corners of the medallion until the 
top is released from the retainer that keeps the top aligned 
when in place. Figure 5.4.
Note: The heat exchanger covers will tilt to the front when 
the center medallion is removed.
Removing the Heat Exchanger Covers
1.  Remove  cleanout  plate  assembly  by  pulling  up  on  the 
latch located at the bottom right corner of rebox. Figure 
5.5
2.  Remove  the  heat  exchanger  cover  by  lifting  it  upward 
about 1/2 inch and  move  the  bottom  edge  front  until  it 
sits at on the rebox bottom.
3.  Rotate the right side of the heat exchanger  toward the 
door  opening  until  you  are  able  to  remove  the  heat 
exchanger from the rebox.
4.  Tip  the  top  of  the  heat  exchanger  toward  the  door 
opening until it can be lifted up and out. Figure 5.5a
Lifting tab
Figure 5.4
Figure 5.5a
1
st
 - UP ↑
2
nd
 - OUT
3
rd
 -  DOWN ↓
Flame Guide
Latch
F. Heat Exchanger Maintenance
Cleaning the Heat Exchanger
With the Heat Exchanger covers removed you can now clean 
the Heat Exchanger surface. 
Using the scraper provided run the straight edge along the 
at  surface  of  the  Heat  Exchanger  removing  any  carbon 
deposits or ash build-up. Figure 5.6.
Figure 5.6
Figure 5.7
After the Heat Exchanger has been scraped, use the dust 
brush supplied to remove any remaining y-ash from the Heat 
Exchanger  as  well  as  other  areas  throughout  the  rebox. 
Figure 5.7.
Scrape the heat exchanger free of Fly-Ash and carbon build-up
1.5”
38.1mm
Brush the rebox free of remaining Fly-Ash.