20 
When  wood  is  burned  slowly,  it  produces  tar 
and other organic vapors, as well as soot, which 
combine with expelled moisture to form creosote. 
The  creosote  vapors  condense  in  the  relatively 
cool chimney ue (associated with a slow burning 
re). As a result, creosote accumulates on the ue 
lining. When ignited, this creosote can result in an 
extremely hot re.
The  FireDome  on  the  TL300  cuts  creosote  to 
almost nothing 
The chimney should be inspected at least once 
every two months during the heating season to see if 
any creosote build-up has occurred. Checking your 
chimney and chimney connector more frequently, 
especially while you are getting used to your stove, 
is recommended.  To inspect this system, let the 
stove cool. Using a ashlight and mirror, check the 
interior of the chimney connector, and the chimney 
itself. If a signicant layer of creosote or soot has 
accumulated (1/8" or 3 mm) it should be removed 
to reduce the risk of a chimney re.
To  clean  deposits  from  the  surface  of  the 
connector, use a stiff wire brush after dismantling 
the  connector  assembly.    To  clean  the  chimney, 
use  a  specially  designed  brush  sized  to  t  your 
particular  flue  opening,  or  call  an  established 
chimney cleaning service.
At  the  end  of  the  heating  season,  perform  a 
thorough examination of your chimney system, and 
have it repaired if necessary.
After the stove has been in operation for awhile, 
the damper gasket may compress and allow the 
damper handle to move from the open to the closed 
position without the added ramp tension needed 
to keep the damper held in the closed position.
• After the stove has cooled off, remove the stove 
pipe from the stove collar and close the damper.
•  Using  a  ashlight,  look  into  the  collar. About 
midpoint of the damper plate on the backside you 
will see the adjustment bolt for the ramp tension. 
(See gure on right.)
• You will need (2) 7/16 " wrenches. Use one to hold 
the bolt still while using the other to loosen the nut.
• Turn the bolt inward (clockwise facing the head) 
approximately 1/4 turn and retighten the locknut.
•  Now  open  and  close  the  damper  to  check  for 
proper tension on the damper lever while moving 
into the closed direction. 
• If the tension is incorrect, readjust the bolt.         
Gaskets  are  used  at  strategic  positions  when 
building  the  Harman  TL300  for  controlling  the 
path  that  incoming  and  outgoing  air  and  gases 
take  through  the  stove.  You  must  check  these 
gaskets from time to time and replace them when 
necessary.  The  gaskets  are  made  of  berglass 
of  different  sizes  (obtainable  from  your  Harman 
dealer) and  some are  xed in place  with a  high 
temperature stove gasket cement.  To change a 
gasket, rst remove the worn berglass and clean 
the area with a wire brush.  Also clean any other 
surfaces that come into contact with the gasket. 
Place a small bead of cement in the area under the 
gasket if required, then press new gasket material 
into the channel; do not overlap the ends. Seat the 
gasket rmly by applying pressure when possible; 
for example, after changing the door gasket, close 
the  door. Allow  the  cement  to  dry  before  using 
your stove.
Gaskets are located:
•  On the doors to provide airtight closure.
•  Between the damper and the damper frame.
•  Rear cover
•  Rear housing
Loosen nut
Turn bolt inward 1/4 
turn.