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 VULCAN “V” SERIES OWNERS MANUAL 

Copyright 2005                                                                     

Dansons Group Inc.

 

 
CLINKERS are those solid, glassy or porous accumulations that may result from burning some types of wood 
pellets. Clinkers are formed in the bottom of the burn grate and if left undisturbed will accumulate and shut off the 
combustion air.  As clinkers grow and shut off combustion air the fire becomes orange/brown and lazy.  Pellets may 
build up in the burn grate. The firebox and window becomes sooty. Exhaust gases may become smoky.  
 
VULCAN “V” SERIES  appliances come complete with a “SUPER” grate.  These grates reduce the amount of 
clinkers formed by lower quality pellets.  The “Super Grate” is a stationary grate that allows more air flow through 
the bottom.  If ashes are quickly blown out of the grate they cannot easily stay in one spot, heat up to the melting 
point and fuse into a clinker.  Clinkers form when pellets are of such poor quality their ashes contain minerals that 
easily melt under high firebox temperatures, are not blown out of the grate, and stay there until larger and larger 
clinkers are produced.   

 

Since wood and the methods of handling wood used in making pellets can vary from plant to plant and year to year 
some clinkering must always be expected.  Stove owners without a “SUPER” grate must remove clinkers manually, 
some times several times a day.  Stove owners using a “SUPER” grate and quality pellets may experience days or 
even weeks of burning without the need to remove any clinkers from the grate. 

 
 
 
 

FINES 

 
FINES in pellets are pieces of sawdust that were not properly formed or are the results of pellets breaking down 
from handling, transporting and/or storage.  Fines adversely affect the operations and heat production of a pellet 
shop and home heater and greatly increase the requirements for daily and periodic cleaning.  Fines cause pellets to 
feed slower thus reducing the amount of heat produced at any given heat control setting. 
 
NOTE:  It is much easier to remove fines from pellets before they are placed in the stove than it is to service your 
stove for a plugged hopper, jammed auger and plugged exhaust system.  Pellets with excessive sawdust may be 
screened to remove most of the fines.  Pellet screeners may be built or purchased from most pellet stove Dealers. 

 
The Pellet Fuel Institute, standards for residential quality pellets are: 

 
 

Length   

  

 1

.5 inches, maximum. 

 Diameter 

 

 

.235 to .350 inches, (approx. 1/4" to 3/8"). 

 

Fines: 

   

.2# maximum per 40# bag. 

 

Salts: 

   

.005 % by weight, maximum. 

 

Ash Content:  

         - Premium Quality 

 

.75% by weight, maximum, (.3# per 40# of pellets.) 

         - Standard Quality 

 2

.5% by weight, maximum, (1# per 40# of pellets.) 

 

 
Check with your Authorized VULCAN “V” SERIES  Dealer, on the quality of pellets in your local area and for 
information on what can be expected from the various local brands. 
 
NOTE:  Since Dansons Group Inc. or Canadian Comfort Industries has no control over the quality of pellets that 
you use, we assume no liability caused by the quality of wood pellets used.