BURNING WOOD OPERATING INSTRUCTIONS
When installation is complete, close the supply switch and turn the thermostat above room temperature.
Check to make sure the forced draft fan above the fire door is operating when the thermostat is set above
room temperature.
The draft fan should be off when thermostat is set below room temperature.
The maximum draft is not to be more than - .05 as damage may result to the furnace when operated as a
gravity unit.
The circulating air blower speed is adjusted at the factory to give an adequate temperature rise under most
conditions. However, because of various temperatures that can result from burning wood, the blower speed
can be adjusted by the motor pulley. Under no circumstances should the temperature rise be more than
80
o
F (27
o
F).
NOTE:
Before loading the fire box, turn the thermostat up to insure that the draft fan is on. This provides an air
curtain to avoid smoke roll out during loading and fans the coals to assist the ignition process of your new
fuel. It also helps to promote draft when there is inadequate draft. After the fire is established, set the
thermostat to desired temperature.
To start the fire, turn up the thermostat to
Maximum
setting to turn
ON
Forced Draft Fan. Place some
newspaper crumpled up in the bottom of the firebox on top of the minimum requirement of 2” of sand , ash
or firebrick. Add some small kindling and light the fire. When the fire starts add some larger pieces of
kindling or wood until you have a good fire. The idea is to ultimately end up with a good bed of ash and
coals which helps to maintain a good controllable fire.
When reloading the firebox there will be a build up of ash and coals from the previous fire. Rake the coals
mixed with ash to the front of the firebox which places the coals at the front. Throw in your wood and the
fire should light in a few minutes.
When the firebox gets full of ash (within one inch of door level), some morning , before loading the firebox ,
push or rake the coals to the rear of the firebox. Remove the ash from the front of the firebox using only the
shovel supplied for this purpose. When the ashes only are removed from the front , rake the coals from the
back to the front. Throw in your wood and the fire will again be burning in a few minutes. The fire burns
best when the ashes are 3” to 4” below the fire door level.
Return wood thermostat in main living space to regular setting.
For safe operating procedure, refer to the “Notice” label on the furnace.
COMBUSTION AIR CONTROL
The amount of combustion air allowed to enter into the firebox can be controlled by means of the Draft
Control slide on the draft fan mounting plate. Set this slide plate to the position that allows sufficient
combustion air in for the type of solid fuel being burned. Normally the setting is in the center between
maximum and minimum, then if additional control is needed it can be adjusted accordingly. When burning
coal it must be set at maximum, for burning wood it will vary with size and type. DO NOT LET THE
COALS/ASHES BUILD UP ANY HIGHER THAN HALF WAY UP THE FIRE BOX LINER.
POWER FAILURE
In case of prolonged power failure, remove the blower access door and air filters. The draft fan will be off,
so if more combustion air is needed for the wood fire, open the slide plate damper in the fire door. This
damper must be closed when power is returned to normal.
DO NOT CHARGE the fire box higher than half way up the liner as overheating may result.
COAL BURNING TIPS (Furnace Model WG 100)
Burn ONLY anthracite (hard) coal of the “chestnut” size. Bituminous (soft) coal is not recommended
because it has a high ash and sulfur content which means more cleaning and greater pollution. Also
bituminous coal produces excessive smoke and an excessive amount of dirt and ash which will plug the
heating unit and the flue pipe possibly causing smoke damage or danger of carbon monoxide poisoning.
Coal is not as easy to burn as wood. It requires patience and a very specific and regular procedure of
loading, shaking, adjusting, etc. If you do not follow the correct procedure, the coal fire will go out. This
can happen in a very short space of time and once the process of extinction has started, it is almost
impossible to reverse.
After a coal fire goes out, all the coal must be emptied from the furnace and the complete starting
procedure must be repeated. The coal burning learning process is often long and frustrating, but once the
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