Harman Stove Company SF160 - Manual (Page 10)

10
Operation
Automatic Draft Control
The heat output is regulated by the auto-
matic draft control on the bottom door. The electric
motor (A) opens and closes the flapper door (B).
Opening and closing the flapper door regulates
the air flow into the firebox.
The maximum air flow can be adjusted
by turning the adjusting bolt (C). Turn counter-
clockwise for more air, and clockwise for less air.
Adjust this bolt only while the flapper door is in the
closed position. Otherwise, motor damage could
occur.
The idle air adjuster (D) controls the mini-
mum amount of air that enters the firebox. Adjust-
ment is made by turning the adjuster vertical for
zero idle air, or horizontal for maximum idle air.
It is best to start out with a medium setting as
shown in Figure 9.
FIG.8
FIG.
Starting a Wood fire
Make sure the boiler and all piping is full
of water and that all air has been purged from the
system.
Never start a fire without water in the
system. An explosion will occur.
Turn on electrical power to the boiler. This
should cause the automatic draft control to open.
Open the ash pan door to allow free air move-
ment. With the firebox door open, crumble ap-
proximately 8 sheets of newspaper and place on
the grates. Lay some small kindling on top of the
newspaper. Be sure this kindling is dry and no
more than 3/4 in. in diameter. Layer the kindling
in a criss-cross type pattern, to allow maximum
air flow. Next lay some larger pieces of wood on
top of the kindling (approximately 2 in. diameter).
Using a match or lighter, light the paper just inside
the door. Close and latch the firebox door and al-
low the fire to burn a few minutes. After about five
minutes, close the ash pan door and re-open the
firebox door an inch or two, to allow the smoke to
clear. Add 4 or 5 larger logs (about 4 in. diameter)
to the well established fire and close the firebox
door. Leave the ash pan door open for about five
minutes only. Now open the firebox door using the
same method as before, always closing the ash
pan door before opening the firebox door. Now
you can load the firebox to the desired level. You
may load wood to the top of the firebox. Close
and latch the door. The ash pan door may again
be opened to speed the ignition process.
Do not leave the boiler unattended with any
door open.
After the wood is burning well, close the
ash pan door. The automatic draft control will now
regulate the fire, based on temperature demand.
The idle air adjuster must be tuned to
where the fire doesn’t go out during long periods
with no demand. Experience will dictate the best
setting for your installation. Normally, the two
manual draft controls on the firebox door are kept
closed while burning wood.