Harman Stove Company Hot Air s SF1500A - Manual (Page 13)

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3-90-70744R11_05/13
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 com bustion
air to the fire. Excess ash ac cumulation 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 dis posal. If the ashes
are disposed of by burial in soil or otherwise locally dis persed,
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, INTEN SIFYINg 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 rE duCEd.
Coal produces considerably more ash than wood. So the
intervals be tween 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 maxi mum 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 ad justment can be reduced. Never adjust the
maximum air bolt when the flap per 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 re moving 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 ChIl drEN AwAY. SErIOuS burNS
wIll rE SulT IF TOuChEd. ThIS IS A hEAT PrO duCINg
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 gAr bAgE, 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 creo sote or bird nests, etc.
Improper sized chimney or stove pipe.
Too many elbows.
Distance of more than eight feet between furnace and
chimney.
down drafts - Trees or other topo graphical barriers may
impede the chimneys operation causing a down draft
condition to exist. This can also be caused by adjacent
buildings or chim neys.
Creosote and Condensation - If creo sote or condensation
runs out of the chim ney or stovepipe, check the following.
Chimney cap or lining may be defec tive.
Furnace may be too far from chim ney, not allowing the
chimney to get warm.
Wood being burned may be green or wet.
Unit may be too large for home caus ing wood to be burned
too slow.
Excessive draft - This can be controlled with a barometric
draft control on the stovepipe.
Operating Instructions/Safety Tips