Lennox Hearth Products Winslow PI40 Installation And Operation Manual page 6

FUEL
The use of unapproved, dirty, wet and / or high salt
content fuel will void the warranty!
This insert is designed to burn wood pellet fuel. In addition, a corn/wood
pellet mixture, with a maximum of 50 percent corn can be burned. Burning
any other fuel that is not approved for use with this appliance will void
the appliance warranty. IMPORTANT: The corn/wood mix needs to be
mixed evenly before being put in the pellet stove hopper.
Wood Pellet Specifications
This appliance has been designed to burn wood residue pellets with up
to 2% ash content. Dirty fuel will adversely affect the performance of the
stove. Any questions regarding pellet fuel can be answered at the Pellet
Fuels Institute (PFI), www.pelletheat.org.
Pellet fuel is made from sawdust and scrap wood from many different
species of wood. Pellets are either 1/4" or 5/16" in diameter and vary
in length. The PI40 insert will burn either diameter pellets. Pellets made
from hardwoods contain more ash than those made from softwoods.
Minerals from ash and sand in the pellets form clinkers under the extreme
temperatures in the Burn-Pot. Try burning various brands of pellets until
you find one that burns with minimum ash and clinkers. Once you find
a pellet brand that burns well, continue using this brand. High ash fuel
increases the frequency of stove cleaning. Fuel with an excessive moisture
content may jam the auger assembly.
Clinkering - Silica (or sand) in the fuel, along with other impurities, can
cause clinkering. A clinker is a hard mass of silica formed in the burning
process. Clinkering is a function of the fuel, (not the stove), but adversely
affects the performance of the stove by blocking off the air passages in
the Burn-Pot. Even P.F.I. approved pellet fuel may tend to clinker. See
Maintenance for more information on cleaning.
Pellet Fuel Storage -
• Store your wood pellets in a dry place to prevent them from absorb-
ing excess moisture.
• Do Not store your wood pellets within the clearance zone of the
stove.
• Do Not store your wood pellets in a place that would block access
to refueling the hopper.
6
CAUTION
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Wood pellets manufactured to the pellet fuels institute (P.F.I.) certification
standard are available in two grades, Standard and Premium. The primary
difference between the two is the ash content of the pellets.
The P.F.I. specification for standard grade & premium grade residential
pellet fuel is as follows:
• CHLORIDES (Salt): Less than 300 p.p.m. to avoid stove and vent
rusting.
• BULK DENSITY: 40 lb. / Cu. Ft. minimum
• MOISTURE CONTENT: 8% maximum
• ASH CONTENT: < 2% maximum (standard grade) < 1% maximum
(premium grade)
• FINES: 0.5% maximum through a 1/8" screen
• BTU CONTENT: There are a number of variations in pellet fuels that are
not included in PFI standards. For example, BTU (heat value) content
may range from just under 8,000 to almost 9,000 Btu, depending upon
species and region of the country and other variables.
Corn Fuel Specifications
Use only clean-shelled corn with a moisture content less than 15% and
approximate fuel value of 7000 BTU/lb (16,200 kJ/kg). Do not attempt
to burn corn with higher moisture content or burn lesser grade fuels.
Do not burn other types of agricultural pellets or by-products (alfalfa,
cherry pits, olive pits, nut shells, etc.) as they are not permitted to be
burned in these appliances.
Shelled corn can be burned in the PI40 pellet insert when it is mixed with
wood pellet fuel. The mixture can contain a maximum of 50 percent corn.
Burning corn may create more ash than wood pellets and may necessitate
the need to clean the Burn-Pot and glass more frequently.
Store corn in a tight container and use methods to ensure the corn does
not become rain soaked or absorb moisture from damp or wet sources.
This will also prevent rodents from becoming a problem. Do not store
corn within stove installation clearances.
NOTES:
• Corn with excessive grain dust must be screened, by sifting with
3/16" mesh screening. Large pieces of cob may plug the auger.
• When changing from burning all wood pellets to burning a corn
and wood pellet mix, the draft adjuster may need to be adjusted to
achieve proper combustion.
Do not burn treated seed corn! Seed corn is treated
with chemical pesticides that are harmful or fatal
if swallowed. Burning treated corn will void your
warranty!
WARNING