Harman Stove Company SF160 - Manual (Page 10)

10
3-90-70742R11_05/13
Operation
Automatic Draft Control
The heat output is regulated by the automatic 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 minimum amount of air
that enters the firebox. adjustment 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. 9
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 movement. With
the firebox door open, crumble approximately 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 crisscross 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 allow 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.
FIG. 8