3-90-00674R20_08/12
There is a 2" square exhaust tube on each side (lower
left and right corners) of the rebox. They can only be
seen with the cast heat exchanger covers removed.
Primary Air Inlets
Using the cleaning brush provided, clean these
tubes after every 1 ton of pellets are used.
These tubes are an important part of the heat
exchanger. Efciency will be lost if they are not
properly maintained. The right side tube is a straight
passage to the combustion blower chamber. The
Left side tube follows straight back then makes
a right turn, across the back, to the combustion
chamber. You will need to use the entire length of
the cleaning brush handle to properly clean this
tube.
The accordion heat exchanger surfaces are the
primary source of heat transfer into the room.
Therefore, it is very important to keep them clean
from yash and soot buildup.
• The heat exchanger surfaces should be cleaned
after approximately every 1 ton of pellets are used.
• Use the scraper provided to clean all the way
into the point.
• Note: An old paint brush works well to clean these
surfaces.
• Note: The unit “must be cold” before using
anything other than a wire brush.
• There are 2 primary air inlet holes on the rear
ange of the burnpot. They should be checked for
blockage and cleaned with a vacuum if necessary.
Note: The bottom of the ame guide has 2 notches
that match the holes.
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