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Page 12 USSC
10. Install grate frame (if not already installed): Lay
the first grate frame on the side supports and slide
to the back of the unit. Then install the second
grate frame to the front as shown in the picture
above. The smooth ends of the frames should be
together in the middle. For the model 30A, insert
the half grate frame in the middle of the front and
rear frames.
12. Installing Firebrick: Place 5 bricks on each side
(10 brick total). The bricks tuck under firebox seem.
For the 30A model, use six(6) full brick and 1 half
brick per side. (12 full and 2 half brick total)
9. Installing collar to top: To install hot air attaching
collar, simply bend all tabs right angle under
shroud. This may be possible with thumbs, if not,
remove top and use small hammer.
CAUTION: Any hot air plenum connection to a fur-
nace must be constructed of metal.
Installing Grates: Install grates together, slip shaker
lug into hole and place grates into frame. Grate
arch faces upward. Check out grate rotation by
placing shaker handle on grate lug (3/4"). Grates
should rotate freely.
NOTE: Grates are designed to withstand high tem-
peratures, however, should you overfire the fur-
nace you may fuse or melt grates. This happens
if furnace receives too much air caused by leav-
ing the ash and feed doors open, draft fan cover
wide open, and hot coals or ashes are excessive
in ash pan.
11.
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