Catalytic Combustor Operation - HearthStone Green Mountain 40 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
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 40 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
Hearthstone Quality Home Heating Products, Inc ®
that the catalysts reach
O
PERATION
little to no visible smoke from your 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 3/8")
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
22
Green Mountain 40 (Model 8640)