Harman Stove Company OAKLEAF 1-90-797000 - Manual (Page 25)

25 Dry Seasoned Wood Only!
Oakleaf Woodburning Stove
Save These Instructions 3-90-798_R9
C. the Combustion process
Combustion in the Harman Oakleaf is precisely
controlled and is best explained in two parts.
During a wood fire, 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 firebox as a sheet of air flowing
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 fire at
the rear of the firebox. The remainder is delivered
into the "Firedome" 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 final 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 firebox
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.
3. grates
The Harman Oakleaf's unique grate system
consists of one flat 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 fire directly against the glass.
The grates and andirons must remain in
place at all times. do not tamper with or
change the configuration of this grate
system.
SECONDARY AIR
THRU BRICK
SECONDARY AIR FLOW
SECONDARY AIR ENTERING
EXHAUST STREAM
SECONDARY AIR THRU
RAMP BRICK
EXHAUST STREAM
PRIMARY AIR FLOW
PRIMARY & SECONDARY AIR FLOW
2. doors
Your stove has a large glass-paneled door for loading
and fire viewing, a separate smaller door for removing
ashes and a top loading door.
Front Door
Before opening, always check for wood, embers, or
ash that may be ready to fall out of the door.
To open the glass door, open the bypass damper first,
then turn the handle clockwise and pull out; to close
the door, push the door closed with the handle in the
open position, then turn, counter-clockwise, to engage
the latch.
Ash Door
To open the ash door, lift up the handle and pull out.
Close the door by pushing in and pushing the handle
all the way down.
Top Load Door
To open the top load door, open the bypass damper
and then lift to open the top load door.
All doors must be closed while the stove is in normal
operation, and the gaskets routinely examined for wear
and replaced when necessary. Good door seals are
important for maintaining control of the stove. Never
operate with the ash door open. Operating the stove with
the ash door open, or with a door inadequately sealed,
could create a serious overfiring condition (discussed
later in this section).
The glass used in your Oakleaf is manufactured to
exact standards to withstand the high heat of the fire,
but like all glass, it must be treated with common sense
and care. Never abuse the glass by slamming the door
shut or striking the glass with a heavy object. If the
glass is broken or damaged, do not operate the stove
until it has been replaced
(See instructions in the Maintenance section.)