Page 10
Product Specication Manual - Osburn 1700-I
ENGLISH
3, stacked in the middle, in an East-West orientation. Let the door open at 90 degrees between
one minute and one minute and 30 seconds. Close the door, start the blower at maximum
speed, and let burn until the weight is down to target.
X
X
Figure 11: Position of the bottom
pieces (High burn)
Figure 12: Position of the two top
pieces (High burn)
Figure 13: Example high burn load
(side view)
For optimal loading of a high fire, take small to medium size fuel pieces (between 2- and
3-inches cross section dimensions approximately) on the bottom and use medium to large size
fuel pieces (3.5 to 4.5 inches of cross section dimensions approximately) on top. To make sure
combustion is equal, put the biggest piece on top of the first three, at the front of the firebox.
See an example of high burn load in the Figure 13 above.
1.1.3 Low burn rate
After the high fire, if there is visible yellow flame, close the air control. When the charcoal bed
weight is between 14 and 17% of the low fire load weight, turn off the blower, open the door,
stir the coals slightly, just enough to have a level plane coal bed, and let the door remain slightly
open for 1 minute before loading the low burn test fuel.
For the loading, put 3 first pieces on the coal bed in an East-West orientation. Leave approximately
1 inch of air space between the rear firebrick and the first piece. There should be air space
between all pieces. The front (3rd) piece may contact the steel andirons. The 2 top pieces (fourth
and fifth) should be added on top of the first 3, slightly angled (10° from the 3 wood pieces at
the bottom). The distance between the logs should be approximately 1 inch. See Figure 14 and
15 for an example of low burn load inside the firebox.
For optimal low fire load, use medium to large size fuel pieces (between 4- and 5.5-inches cross
section dimensions approximately) on the bottom and use small to medium size fuel pieces (2.5
to 4 inches cross section dimensions approximately) on top. To make sure combustion is equal,
put the smallest piece on top of the first three, at the back of the firebox (see Figure 16 for an
example of low burn load).
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