Harman Stove Company XXV, Installation & Operating Manual

2

XXV Pellet Stove

3-90-00684R22_04/13

Fuel and Fuel Storage

Pellet  fuel  quality  can  fluctuate  from  manufacturer  to 

manufacturer, and even from bag to bag. 
Hearth & Home Technologies recommends using only fuel 

that is certified by the Pellet Fuels Institute (PFI).

Fuel Material

•  Made from sawdust and/or other wood by-products

•  Shelled field corn (when mixed with wood pellets)

•  Source material typically determines ash content

higher ash content Material

•  Hardwoods with high mineral content

•  Bark and leaves as source material

•  "Standard" grade pellets, corn and other biomass

lower ash content Material

•  Softwood; pine, fir, etc.

•  Materials with lower mineral content

•  "Premium" grade pellets

Shelled field corn

•  Must be 15% moisture content or less

•  Must be clean and free of debris

•  Must be mixed with wood pellets. (Up to 50%)

•  Stalk  parts,  excessive  fines  and  cob  remnants  may 

cause feed system jams or blockage

CAUTION! Do not burn fuel that contains an additive; 

(such as soybean oil) 

•  May cause hopper fire

•  Damage to product may result
Read  the  list  of  ingredients  on  the  packaging.  If  you  are 

buying field corn, the only ingredient listed should be field 

corn.

WARNING! Risk of Chemical Poisoning!

Do 

NOT

 burn treated seed corn

•  Chemical pesticides are harmful or fatal if swallowed

•  Burning treated seed corn will void the product warranty

clinkers

Minerals  and  other  non-combustible  materials,  like  sand, 

will turn into a hard glass-like substance when heated. 
Trees from different areas will vary in mineral content. For 

this  reason,  some  fuels  will  produce  more  clinkers  than 

others.

Moisture

.125Always burn dry fuel. Burning fuel with high moisture 

content takes energy to dry and tends to cool the appliance 

thus, robbing heat from your home. Damp pellet fuel could 

turn back into sawdust which does not flow properly through 

the feed system.

cautiOn

Tested and approved for use with wood pellets and a 

mixture of shelled field corn and wood pellets ONLY. 

Burning of any other fuel will void your warranty.

nOtice

Hearth & Home Technologies is not responsible for 

stove  performance  or  extra  maintenance  required 

as a result of using fuel with higher ash or mineral 

content.

Fuel Specifications

Size

•  Pellets  are  either  1/4  inch  or  5/16  inch  (6-8mm)  in 

diameter

•  Length should be no more than 1-1/2 inches (38mm)

•  Pellet  length  can  vary  from  lot  to  lot  from  the  same 

manufacturer 

Performance

•  Higher ash content requires more frequent maintenance.

•  "Premium" grade pellets will produce the highest heat 

output.

•  Burning  pellets  longer  than  1-1/2  inches  (38mm)  can 

cause inconsistent feeding and/or ignition.

We recommend that you buy fuel in multi-ton lots whenever 

possible.  However,  we  do  recommend  trying  different 

brands  prior  to  purchasing  multi-ton  lots,  to  ensure  your 

satisfaction.

CAUTION!

 Attempting to burn fuels such as charcoal has 

the potential of generating Carbon Monoxide which is 

DEADLY. Never burn fuels other than those listed on the 

appliance safety label.

When changing from wood pellets to a corn/pellet mixture, 

the FEED ADJUSTER will likely need adjusted to a lower 

setting. When under maximum demand, ensure there is no 

unburned fuel being pushed into the ash pan.

Storage

•  Wood pellets should be left in their original sealed bag 

until ready to use, to prevent moisture.

•  Shelled  corn  should  be  stored  in  a  tightly  sealed 

container to prevent moisture and to deter pests

•  Do not store fuel within the specified clearance areas, 

or in a location that will interfere with routine cleaning 

and maintenance procedures.