Harman Stove Company SF2600A - Manual (Page 12)

SF 2600 - Oil Operation as backup -
The SF 600 offers a unique option to the homeowner.
The ability to have an efficient oil backup heat source
built right into a wood/coal furnace.
The operation of the oil burner as a backup system is
as simple as setting a thermostat. To use the oil portion
of your furnace as a backup proceed as follows:
. Set the wood/coal thermostat to the comfort level
you desire.
. Set the oil thermostat to a level 5 to 0 degrees
but not less than 3 degrees lower than the wood/coal
thermostat.
That’s all there is to it. The idea is that when the wood/
coal portion can no longer maintain the level set on that
thermostat the oil portion will come on and maintain the
temperature set on the oil thermostat.
SF 2600 - Oil Operation Only - In the oil only
mode, simply turn the wood/coal thermostat to its lowest
setting and select the comfort level you desire on the oil
thermostat. The SF 600 will now act as a standard oil
burner and maintain your chosen temperature. NOTE:
It is recommended that the wood/ coal fire in the lower
portion of the furnace be out or nearly out before going
to “oil only” operation.
Curing Paint - During the first few hours of burning,
a blue smoke will be observed rising from the painted
surface of the furnace. It is advisable to increase the
amount of fresh air in the room during this breaking-in
period. This may be achieved by opening doors, win-
dows, etc. Don’t be alarmed. This is normal.
Starting a wood Fire - Open the bottom door
to increase the draft. Take about eight sheets of
newspaper, crumbled into balls and place on top of
the grates. Next, lay some fine kindling on top of the
paper. This kindling must be dry and no larger than 3/4”
diameter, and should be layered in a criss-cross pattern
to allow good air flow. Then, lay some slightly larger
pieces (” diameter) of wood on top of the kindling.
Light the paper at the bottom just inside the door. Now
close loading door and allow kindling and wood to catch
fire. After about five minutes, close the bottom door and
open the loading door an inch or two for a few seconds
before opening completely. This method will allow the
smoke to clear away from the door opening. Now the
fire should be well established and ready for some
larger wood. Add four or five pieces of 3” to 4” diameter
wood. Close loading door and open bottom door again.
Let burn for about 5 minutes. Now open loading door
using the same method as before, always closing the
bottom door before opening the top door. Now load the
firebox with wood to the desired fullness. All Harman
furnaces may be loaded with wood as full as possible
for high output and long burn time. Then close the door
and allow all the wood to catch fire. The bottom door may
again be opened to speed the process. The object is to
get the wood burning well enough so it will not go out
when the automatic draft shuts back to the idle setting.
NOTE: When the bottom door is open, the automatic draft
cannot function to reduce the amount of air to the firebox.
For this reason, the furnace could overheat.
wArNINg: NEvEr lEAvE ThE bOTTOm dOOr
OPEN whIlE FurNACE IS uNATTENdEd!
After the wood is burning well, close the bottom door.
The automatic draft control will now regulate the fire.
The idle control (as shown on Fig. 6) on the flapper door
must be adjusted so the fire does not go out or overheat.
Experience will dictate the best setting. Normally the
two manual draft controls on the loading door are kept
closed to burn wood.
Starting A Coal Fire • Use the same procedure as
for wood except do not go to large diameter wood. Use
wood about ” in diameter maximum. This size will form
very hot wood coals in less time. Here again, the bottom
door may be opened to speed the process. When a
substantial bed of red wood coals are developed, start
adding a thin layer of coal. Pea or nut sized coal is better
for starting a fire than stove coal. When the first layer
is burning with some blue flame, continue to add thin
layers of coal until there is a solid bed of burning coal.
Let each layer burn a blue flame before adding another
layer. Layers can be added until the bed is approximately
ten inches deep. This is about at the top of the firebrick.
Most users find that if they keep the two manual draft
controls open about one quarter turn, it helps keep the
gasses burned off.
NOTE; Close the bottom door as soon as the desired
coal bed is made.
loading - Coal should never be added unless there is
a reasonably hot fire. The coal bed should be bright and
vigorous. If the fire is burning hot and there is a deep
bed of coals, full loads of coal can be added at any time.
However, if there is not a deep bed of coals, it is best to
add small amounts of coal at first.
Shaking - Shaking should be done only when there
is a well-established fire. The frequency of shaking will
depend on the degree of burning. Shaking should be
done whenever the furnace is refueled. Best results for
shaking Harman grates will occur when short choppy
strokes are used rather than long even strokes.
Operating Instructions