Harman TL300 - The Combustion Process

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Dry Seasoned Wood Only! Save These InstructionsHarman® • TL300 Owner's Manual_R25 • 2007 -___ • 08/15
D. The Combustion Process
Combustioninthereboxispreciselycontrolledandisbest
explained in two parts.
Duringawoodre,combustionairentersatthebottomfront
of the stove where it travels upward through channels at either
side of the front door. From the manifold located above the
frontdoor,itisdirectedintothereboxasasheetofairowing
between the glass and the wood. This concept helps to keep
the glass clean, while providing the oxygen needed to sustain
burning. This is what is known as "Primary Combustion".
Additional air enters at the bottom rear of the stove body.
Some of this air enters through holes in the rear bricks where
itisusedtorevitalizethereattherearoftherebox.The
remainder is delivered into the "Firedome Plus" combustion
package where the "Secondary Combustion", or re-burning
of the smoke, occurs.
During combustion, the burning of wood proceeds through
several stages. The initial or evaporation stage is where
the moisture in the wood is driven off in the form of steam.
A second stage is where the volatile gases contained in the
wood are released and burned. This represents most of the
wood'sheatingcapacity.Thenalstageisthecharcoalstage
where the charcoal burns the remaining heat content in the
wood fuel. Ash remains after the burning is complete. Within
theprimaryreboxtwoormoreofthesestagesofcombustion
are occurring at once.
Always be sure to provide adequate ventilation to the room
where the appliance is located, to prevent air starvation.
In tight construction, consider installing outside air to the
appliance.
Grates
The unique grate system consists of one atbottomgrate,
and two front andirons. The bottom grate has slots which
allow the ash to fall into the ash pan by passing a poker back
and forth across the grate. The andirons keep the fuel from
coming into direct contact with the glass, and keep hot coals
and embers from spilling out while reloading. Never build a
redirectlyagainsttheglass.
The grates and andirons must remain in place at all
times. Do not tamper with or change the conguration
of this grate system.
C. Burning as a Fireplace
This appliance has been tested and approved for burning as
anopenreplace.Todoso,asparkscreen(Harmanpart#
3-40-06960; Cozy Screen) must be installed over the front
door opening. The by-pass damper must be kept in the open
position.
TheCozyScreencanbeusedfromthestartofareorcan
beusedwithanexistingone.Whenstartingarewiththe
Cozy Screen, smoke spillage may occur until it develops a
draftstrongenoughtopullallsmokebackintotheue.
DO NOT LEAVE THE APPLIANCE UNATTENDED WITH
THE DOOR OPEN!
Load only small amounts of wood at a time.