Harman Stove Company SF2500A, SF1500A, SF2600A, SF 3500A manual Operating Instructions/Safety Tips

Operating Instructions/Safety Tips

The amount of shaking is critical. Too much will disrupt the fire bed and too little will restrict the air flow.

The proper amount normally occurs when red coals first start to drop through the grates into the ash pan. Ashes - Ashes should never be allowed to accumulate in the ash pit so that they in any way impede the flow of combustion air to the fire. Excess ash accumulation can cause the fire to go out and also can cause severe damage to the grates because of the absence of a cooling flow of air beneath them.

Ashes should be placed in a metal container with a tight fitting lid. The closed container of ashes should be placed on a noncombustible floor or on the ground, well away from all combustible materials, pending final disposal. If the ashes are disposed of by burial in soil or otherwise locally dispersed, they should be retained in the closed container [outside the dwelling) until all cinders have thoroughly cooled.

CAUTION: ASHES SHOULD NEVER BE ALLOWED TO ACCUMULATE ABOVE THE TOP OF THE ASH PAN. ASHES IN CONTACT WITH THE BOTTOM OF THE GRATES ACT AS AN INSULATOR, INTENSIFYING THE HEAT ON THE GRATES, AND COULD CAUSE THEIR WARPAGE. WITH AN EXCESSIVE ASH BUILDUP, PRIMARY COMBUSTION AIR IS RESTRICTED. THUS THE UNIT’S OUTPUT COULD BE RE­DCED.

Coal produces considerably more ash than wood. So the intervals between emptying are much shorter. For equal heat output,coal will produce seven to ten times more ash than wood.

Draft Control Settings - The idle air adjustment on the flapper door may need to be adjusted slightly less for coal than for wood. Here again, experience will dictate the best setting. The maximum air adjustment bolt can be set at the maximum position for quick recov-

ery. When a longer than normal burn time is desired, the maximum air adjustment can be reduced. Never adjust the maximum air bolt when the flapper door is opened. See Fig. 6 on page 11.

Safety Tips

When opening the loading door, it should be cracked open slightly for a few seconds to allow oxygen to burn any gases that may be present and to allow smoke to be drawn away from the door.

Whenever the bottom door is open, it should be closed before opening the loading door. This is to increase draft through the loading door and prevent excess smoke from escaping.

The firebox should never be filled with excessive coal so that the flue exit is blocked or impeded in any way. Burn­ ing coal generates carbon monoxide. If the flue gas exit is blocked, the carbon monoxide can be forced out of the fur­

nace into the room with possible fatal consequences. With the exception of start up or increasing heat from a low fire, or removing ashes, the bottom door should be kept closed. Never install a Harman furnace to a chimney with a history of down drafts.

KEEP CHILDREN AWAY - MAY CAUSE SERIOUS BURNS.

CAUTION: ALL SURFACES OF FURNACE ARE HOT. DO NOT TOUCH. KEEP CHIL­DEN AWAY. SERIOUS BURNS WILL RESULT IF TOUCHED. THIS IS A HEAT PRO­DCING APPLIANCE.

FUEL/FIRING WARNINGS -

DANGER! FIRE HAZARD! DO NOT USE CHEMICALS OR FLUIDS TO START OR “FRESHEN UP” A FIRE. SEVERE BODY BURNS OR A FIRE IN YOUR HOME COULD RESULT. DO NOT BURN GAR­AGE, GASOLINE, THINNERS, DRAIN OR ENGINE OIL, KEROSENE, OR FUEL OIL, ETC. AN EXPLOSION, A HOUSE FIRE OR PERSONAL INJURY COULD RESULT. KEEP ALL SUCH LIQUIDS WELL AWAY FROM THE FURNACE WHILE IN USE.

Chimney Problems

Not Enough Draft - Chimney is too low. A chimney should be two feet higher than anything ten feet around it.

Air may be leaking in around a loose fitting clean-out door, flue pipe may not be tight at joints, or the masonry may be defective.

Chimney may be blocked with creosote or bird nests, etc.

Improper sized chimney or stovepipe. Too many elbows.

Distance of more than eight feet between furnace and chimney.

Down Drafts - Trees or other topographical barriers may impede the chimneys operation causing a down draft condition to exist. This can also be caused by adjacent buildings or chimneys.

Creosote and Condensation - If creosote or condensation runs out of the chimney or stovepipe, check the following.

Chimney cap or lining may be defective.

Furnace may be too far from chimney, not allowing the chimney to get warm.

Wood being burned may be green or wet.

Unit may be too large for home causing wood to be burned too slow.

Excessive Draft - This can be controlled with a barometric draft control on the stovepipe.

13