Hearthstone Quality Home Heating Products, Inc
® Green Mountain 40 (Model 8640)
19
Figure 13 – Bypass Open
CATALYST THERMOMETER:
The catalyst
thermometer monitors the downstream temperature
of the catalysts, and indicates when the stove is in
the active range for the catalysts. When the stove is
in the “active” range, the bypass handle should be
closed. When the stove is in the “Inactive” range, the
bypass handle should be opened until the stove
heats up. If the thermometer is in the “Too Hot”
range, keep the door closed, fully close the air
control, and allow the stove to cool down until the
thermometer falls into the “Active” Range. Once the
catalyst thermometer has reached the active range,
heat generated from burning smoke keeps the
catalysts warm and active as long as fuel remains in
the stove. The Green Mountain 40 typically operates
in the 800
⁰
F to 1300
⁰
F range.
Figure 14 – Catalyst Thermometer
C
HOOSING
F
IREWOOD
Burn only natural firewood (known as cordwood) in
the Green Mountain 40 Model 8640 Wood Heater.
This stove is not designed to burn other fuels.
•
CAUTION: DO NOT USE CHEMICALS OR
FLAMMABLE FLUIDS TO START THE FIRE. DO
NOT USE CHARCOAL, PELLETS, COAL,
ARTIFICIAL LOGS OR ANY OTHER MATERIALS
AS FUEL; THEY ARE NOT SAFE. DO NOT BURN
GARBAGE OR FLAMMABLE FLUIDS.
•
THE USE OF UNAUTHORIZED FUEL SUCH AS
COAL COULD PRODUCE HIGH LEVELS OF
CARBON DIOXIDE IN THE LIVING SPACE. AT
HIGH LEVELS CARBON DIOXIDE COULD RESULT
IN PERSONAL INJURY OR DEATH.
The quality of your firewood directly affects heat
output, duration of burn and performance of your
stove. Softwoods generally burn hotter and faster,
while hardwoods burn longer and produce better
coals. Density and moisture content are two critical
factors to consider when purchasing wood.
The following is a list of some wood species and
their relative BTU (British Thermal Unit) content. The
higher the BTU content, the longer the burn.
Firewood with higher BTUs is generally ideal for a
wood stove.
Burn untreated wood only. Other materials such as
wood preservatives, metal foils, coal, plastic,
garbage, sulphur, or oil may damage the catalysts.
Wood Heat Value: Sorted By Btu Content
Common Name
Lb/ cord
MBTU/ cord
High
Osage Orange (Hedge)
4,728
32.9
Hickory, Shagbark
4,327
27.7
Hop Hornbeam (Ironwood)
4,267
27.3
Beech, Blue (Ironwood)
3,890
26.8
Birch, Black
3,890
26.8
Locust, Black
3,890
26.8
Hickory, Bitternut
3,832
26.7
Locust, Honey
3,832
26.7
Apple
4,100
26.5
Mulberry
3,712
25.8
Oak, White
4,012
25.7
Medium High
Beech, European
3,757
24
Maple, Sugar
3,757
24
Oak, Red
3,757
24
Ash, White
3,689
23.6
Birch, Yellow
3,689
23.6