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Removal and Replacement
1) Allow the ashes to burn completely and extinguish.
2) Push the ashes to the back of the rebox or remove all the ashes from the rebox.
3) Run a small pry bar around the perimeter of the grate and the edge of the ash pit to
loosen the grate.
4) Lift out the broken grate.
5) Clean the edge of the ash pit in which the new grate will sit.
6) Install the new grate. Make sure to install the new grate with the narrow width of the slot
towards the re.
Sand
Principles of Sand in the Base of the Firebox
The HEATMOR™ furnace, in boiler terms, is a “dry base boiler.” This is to say there is no
water around the base of the rebox. The rebrick and sand hold and release heat to the
rebox during the off cycle.
A sand base provides complete corrosion protection to the most corrosion prone area of a
furnace.
Types of Sand to Use
Refer to Initial Installation for type of sand to use.
Installation
1. Cover the grates with a piece cardboard.
2. One person enters the rebox.
3. Another person shovels the sand into the
rebox while the person inside packs the sand
completely, using a piece of wood like a 2 x 4 x 10" inches long.
4. Fill the base with sand, level to the top of the grates.
Maintenance/Result
The sand should never need to be removed. When stirring the ashes, rake only the area
over the grates. There is no need to stir the areas where the sand is located. Maintain
the sand level to the top of the grates. Check the level on a yearly basis and add sand if
necessary.
Removal and Replacement
1. Allow the ashes to extinguish and then remove all the ashes from the rebox.
2. Allow the water to cool down.
3. One person should get into the rebox and with a small scoop, remove the sand from
around the ash pit.
4. Replace as above.
Sand
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