15
FORGE OUTDOOR COAL FURNACE • OWNER'S MANUAL
CAUTION
Never keep the firebox door open longer than necessary. If at any time smoke or flames
start increasing to the point where they are billowing out the door, quickly shut the
firebox door and wait a few minutes before repeating the door opening procedure.
Maintaining the Ash Bed
If burning bituminous, it is very important to establish and maintain a 3-4"
ash bed on the shaker grate in order to protect the shaker grate from damage by
overheating. If burning anthracite, the ash bed will be much thinner. In either
case, the coal or wood fire must not burn directly on the grate.
CAUTION
For bituminous, maintain a 3-4" deep ash bed over the shaker grate to protect from
overheating. For anthracite, the ash bed needs to be much thinner. In either case, the
coal or wood fire must not burn directly on the grate. Damage to the shaker grate is not
covered by warranty.
Cold Start Firing
NOTE: These procedures apply to initial firing or refueling the outdoor furnace from a cold
start (e.g., first firing of the season or after an extended period of down time).
Just like burning wood, burning coal can be more of an art than a science. You
may need to vary techniques to achieve best results. Over time, you will learn
the proper techniques required for a clean, consistent burn every time. This will
allow you to identify cause and effect in a variety of circumstances and what
works best for your conditions.
CAUTION
Do not burn plastic, garbage, treated wood or fuels not listed for this outdoor furnace.
CAUTION
If the water in the outdoor furnace boils, be sure to check the water level and restore
to full. Add Corrosion Inhibitor Plus™ (p/n 1650) as needed (see Water Quality and
Maintenance).
NOTE: Before firing the outdoor furnace for the first time, make sure the proper amount
of Corrosion Inhibitor Plus™ has been added and the water level is 1" below the full mark
on the sight gauge, as the water will expand when heated.
For bituminous,
maintaining a 3-4" ash
bed on the shaker grate
protects the shaker grate
from damage caused by
overheating. However, if
the ash bed is too thick, it will reduce and
hinder performance.
For anthracite, the ash bed
that protects the shaker
grate from damage caused
by overheating will need to
be much thinner.
