Catalytic Combustor Operation - HearthStone 8680 Owner's Manual

7) After closing the bypass door, allow the stove to
run on a high setting for around 20 minutes to
ensure the catalytic combustor stays in the active
range. This will also allow the fire to burn off any
residue on the door glass from any previous low-
burn fires
8) Use the primary air control to regulate the desired
rate of burn. Pull the handle towards you for a
higher burn rate, and push the handle towards the
stove for a lower burn rate. The air control does
not close completely.
Note: Always remember to open the bypass handle
before opening the front door. When opening the front
door to reload or re-arrange logs, it is advisable to
open the door just a crack, pause for a moment then
open the door completely. This procedure allows the
firebox to clear of smoke before the door is open fully.
In addition, reloading on a bed of hot, red coals
reduces smoking time and brings fresh fuel up to a
high temperature rapidly. During the refueling and
rekindling of a cool fire, or a fire that has burned down
to the charcoal phase, operate the stove at a medium
to high firing rate for about 10 minutes to ensure that
the catalysts reach approximately 600 °F. Once the
catalysts reach operating temperature, the bypass
handle can be closed. When reloading the stove, try
to keep an open path behind the Lower Primary Air
Opening (LPAO). It is helpful to leave a small valley
in the coal bed behind the LPAO to insure faster re-
lighting.
C C
ATALYTIC OMBUSTOR
The Green Mountain 80 uses a catalytic combustor to
ensure highly clean and efficient burns. The catalytic
combustor is made from a stainless steel corrugation
that is coated with a catalytic material. The catalytic
combustor becomes active around 500 ⁰F (260⁰C),
helping to burn up smoke and any remaining particles
that were not fully burned in the firebox. During the
startup of a cold stove, a medium to high firing rate
must be maintained for about 20 minutes. This
ensures that the stove, catalysts, and fuel are all
stabilized and at proper operating temperatures.
Even though it is possible to have gas temperatures
reach 500 °F (260⁰C) within 2 to 3 minutes after a fire
is started, if the fire is allowed to die down
immediately, it may go out or the combustor may stop
working. Once the stove and catalytic combustor heat
up, heat generated from burning smoke keeps the
catalysts warm and active as long as fuel remains in
the stove. You stove will burn the cleanest and most
efficiently when the catalysts are in the active range.
There should be little to no visible smoke from your
Hearthstone Quality Home Heating Products, Inc ®
O
PERATION
chimney when the catalysts are in the active zone and
fully functional.
B R
URN ATE
This wood heater has a manufacturer-set
minimum low burn rate that must not be altered.
It is against federal regulations to alter this
setting or otherwise operate this wood heater in
a manner inconsistent with operating
instructions in this manual
LOW BURN: Move the air control lever all the way
inward toward the stove. (See figure 13). This closes
the air shutter to its minimum opening. A low burn rate
over extended periods is not advisable as it can
promote the accumulation of creosote. Inspect the
venting system frequently if using low burn rates
consistently.
MEDIUM LOW BURN: With the primary air control in
the low position, pull the air control forward (a little
less than 1/4"). A medium-low burn rate is the typical
setting and is preferable if the stove is unattended. At
this burn rate, a little goes a long way.
MEDIUM HIGH BURN: With the primary air control in
the low position, pull the air control forward (a little
less than 1/2")
HIGH BURN: Completely open the primary air control
by moving it all the way outward toward the operator.
Fully load the firebox with wood on a bed of hot coals
or on an actively flaming fire. To minimize creosote
accumulation, run the stove on high once or twice
daily for 35 to 45 minutes to fully heat the stovepipe
and chimney.
CAUTION: Do not burn fuel other than cordwood in
your stove.
Figure 15 – Air Control Position
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Green Mountain 80 (Model 8680)