Heatmor 200X - Firebox Door Function and Maintenance; Firebox Door Principles and Operation; Firebox Door Seal Maintenance

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Firebox Door
Principles of the Firebox Door
The rebox door is water cooled to prevent warping of
the door. It also acts like a water jacket, absorbing heat
from the re, and placing that energy into the water. Being
water cooled, the front of the rebox door will never be
hotter than the water. The cold outside atmospheric air is
drawn over the warm surface of the rebox door, by the
combustion blowers, which is then warmed and forced
into the rebox as warmed combustion air. This lessens
the time needed for the interior of the rebox to reach that
high smoke burning temperature. It is important that the
rebox door seal maintains an airtight seal.
Operation of the Firebox Door
Water from the main water-jacket ows in a loop between the rebox door and the water-
jacket by natural thermal siphoning. Since there is no pump involved, there is very little
pressure. During this process, the water cools the door and the water in the door is heated.
Refer to Safe Operating Guidelines for further instructions on how to safely open and
close the rebox door or contact your local dealer.
Maintenance / Result
A properly adjusted rebox door will not allow smoke to enter or escape the rebox.
Maintain a tight seal all around the perimeter of the rebox door at all times. There may be
times when the perimeter of the rebox door will build up with “creosote strings,” especially
along the bottom.
To keep the perimeter clean, occasionally scrape down to the steel. Do not cut, scrape or
disturb the actual soft, pliable seal. Keep the door correctly adjusted on the hinges so that
the pliable seal is being forced against the rebox ledge. Keep all nuts and bolts on the
handle, latch and hinges properly adjusted.
The seal itself consists of a rope in the groove of the rebox door, covered with high tem-
perature silicone.
Failure to manage and maintain the rebox door could result in premature replacement of
parts and a buildup of creosote.
(When replacing the Firebox Door, it is recommended to replace the Door Hoses at this
time.)
Firebox Door