49
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. This shortens the time when smoke will be emitted.
A sand base provides complete corrosion protection to the most
corrosion prone area of a furnace.
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. Refer to page 20 for types of
sand to use.
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