19 
Sometimes  it  will  be  necessary  to  clean 
accumulated ash from the glass surface; allowing 
this ash to remain on the glass for long periods can 
result in “etching” due to the acidity of the ash. The 
creosote which accumulates on the glass should 
burn off during hot res.
Never clean the glass while it is hot, and 
use abrasive substances. Wash the surface with 
cool water, and rinse thoroughly. You may wish to 
use a non-abrasive cleaner specically designed 
for use on stove glass. In any case, dry thoroughly 
before relighting your stove.
Like  all  ne  equipment,  your  TL300  requires 
some routine maintenance and inspection. Follow 
the  guidelines  in  this  section  to  assure  safe, 
efcient operation.
The stove’s exterior surface should be dusted 
periodically with a soft cloth. For more thorough 
cleaning, wait until the stove is cool before using 
a damp cloth to clean any blemishes.
To avoid a rust build-up on the inner surfaces 
of the controls, work the controls back and forth 
several times during the summer or any prolonged 
period  when you are not using your stove.
The  inside  of  the  fire  chamber  should  be 
examined  for  damage  to  the  refractory  lining 
material, grates, and casting. If any bricks have 
been  damaged,  replace  them  with  Harman 
replacement parts. Be sure that all air holes in the 
refractory  are  open.  The  Firedome  combustion 
package can be examined and/or cleaned  with 
the bricks removed. 
      
If  the stove’s glass is cracked or broken, you must 
replace it  before  operating  your  stove.   Remove 
pieces carefully. Replace glass only with Harman 
replacement glass; do not use substitutes.
To replace the glass panel, you will need to 
remove the door. To do this, open the door,  lift it 
straight up and place it on a soft surface.
Carefully  remove  damaged  glass,  gasket 
material, and hold down clips (set aside). 
Referring to the diagram, note how the various 
components of the door system t together. Lay the 
load door face down on the soft surface, and install 
the self adhesive 1/4"” gasket material around the 
front face of the glass. Note: this glass has a special 
IR coating on one side. This coating must be to the 
 of the stove. The coated side has a label 
on it and/or will show resistance on a ohm meter. 
Set the glass panel and gasket gently onto the 
door.  Install the hold down clips and tighten with 
bolts as shown. Reinstall door on stove.
 use any 
tools or re poker 
within this area.