Page 11
Product Specication Manual - Osburn 1700-I
ENGLISH
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Figure 14: Position of the bottom
pieces (Low burn)
Figure 15: Position of the two top
pieces (Low burn)
Figure 16: Example low burn load (side
view)
Let the door ajar at 90° until the flames roll on top of the fuel (between 2:00 and 4:00 minutes)
and then close the door with the primary air control open. See picture below for rolling flame:
Close the primary air control by small increments (ex: 1/16 of an inch), from ½’’ to fully closed,
between 4 and 15 minutes after the loading period. Before closing further, make sure the flame
intensity is increasing or stable. Close the air control completely. Turn ON the blower at maximum
speed.
1.1.4 Medium 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 medium 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 medium burn test fuel.
For the loading, put 3 first pieces on the coal bed in an East-West orientation. Leave about 1
to 2 inches of air space between the rear firebrick and the first piece. The front (3rd) piece
should stand off from the steel andirons by approximately 1 inch. The 2 top pieces (fourth and
fifth) should be added on top of the first 3, slightly angled (10° from horizontal, top view). The
distance between the logs should be approximately 1 inch. See Figure 17 and 18 for an example
of medium burn load inside the firebox.
For optimal medium 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
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