Greenfield Installation and Operations Stove
Page 31
Stoves connected to
Vertical Vent
systems should use reduced damper settings. Close the
damper a 1/16” – 1/8” to compensate for the natural draft of the vertical chimney.
Procedure for adjusting the damper for burning Grains and Cherry Pits -
When burning
Corn, wheat, rye & Distiller’s Grain the burn pot should be
“Balanced
”. This means the fuel that
is being fed into the burn pot rapidly turns into glowing coals. If you see a lot of unburned fuel in
the pot, an adjustment may be needed. In an unbalanced pot, the corn, wheat or rye will quickly
stick together and prevent the proper flow of combustion air. The pot will overload and the fire
will go out.
Conditions indicating Inadequate or Excessive Draft
When burning Corn, Wheat, Rye or Distiller’s grain the effects of inadequate and excessive draft
will be the same. The pot will overload (see point 3 below) and the fire will go out. The rule of
thumb is to make small adjustment to open the damper if the vent is horizontal and to make small
adjustments to close the damper if the vent terminates above the roof.
1.
Balanced
burn pot. This means the fuel rapidly turns into red-hot coals once it is in the pot.
2.
Lag time
. This is the time it takes for the corn to start burning and the burn pot to become
balanced. Corn will tend to stick together in a clump in the burn pot if the corn feeds in faster
than it’s burning.
3.
Overloaded
burn pot. If the corn forms a clump in the burn pot it chokes off the airflow
and the pot will overload and slowly the fire will die out.
Set the damper according to the list “Initial Damper Settings” on the previous page.
a.
Once the Stove is burning, leave the control board on the #1 setting for ½ an hour. This will
allow the Stove to warm up before any adjustments to the damper are made. After ½ an hour,
look in the burn pot to see if the burn pot is balanced. The Stove should be burning fine and an
adjustment is most likely not needed. Make note of any damper changes you make at each heat
level for future reference.
b.
Advance the heat setting to #2 and let the Stove burn at this setting for ½ an hour. Check
the burn pot to see if it is balanced. Most likely the Stove will be burning fine at this point.
c.
Advance the heat setting to #3 and let the Stove burn at this setting for ½ an hour. Check
the burn pot to see if it is balanced.
Remember:
Look at the coals in the pot, not at what the
flame looks like. Most likely the damper will not need to be adjusted.
d.
Advance the heat setting to #4 and let the Stove burn at this setting for ½ an hour. Check to
see if the pot is balanced. This is where a damper adjustment
might
need to be made. As the
heat setting reaches the higher settings the
“Lag time”
can become too long if the air isn’t
adjusted correctly. If you notice that the coals are being covered up with unburned fuel, adjust
the damper to give it more air by sliding the damper control 1/16” only
