Fulton Classic ICX or FB-F Vertical Tubeless Boilers (Steam) Oil Fired - Manual (Page 33)

Operation
Primary Air Adjustment
Procedure
a) The primary air adjustment or
main air control is located at the fan
housing face. This control is used
to supply the burner with excess air
to facilitate good combustion. Too
much or too little air will result in
poor combustion. It is important to
make sure the lowest level of
excess oxygen is present while still
maintaining a high level of carbon
dioxide and negligible carbon
monoxide. Using a CO
2
or O
2
tester it is possible to determine the
percent of excess air in the combus-
tion mixture.
b) On a No. 2 oil fired boiler the
oxygen should be 4 percent with 11
percent carbon dioxide. A smoke
test is the best means to check for
combustibles in the flue gases. A
smoke test of 0-2 is an acceptable
level. It is best to measure the flue
gas with the stack in excess of 420F
(216 degrees C). To increase the
oxygen in the burner open the air
adjustment to the right. To close or
reduce the secondary air, move it to
the left.
Secondary Air Adjustment
Procedure for Fulton Oil Fired
Steam Boilers
a) The secondary air control
adjustment is located on the top,
right-hand side of the burner assem-
bly. This damper type air controller
is used to introduce air to and
through the blast tube of the burner.
The purpose of the secondary air
adjustment is to proportionately
divide the air to the center or outer
fire chamber.
By moving the damper closed, the
air is forced to the outside of the fire
chamber with less air going down
the blast tube area. By pulling the
damper open more air is forced
down the blast tube and less on the
outside wall of the deflector face
and fire chamber.
It is important in the combustion
process to maintain proper air mix-
tures between the outer surface and
center of the blast tube area. On
most boilers the damper is locked in
a wide open position. However, if it
is necessary to close the damper,
care should be taken to close the
damper slowly and no more than
1/4 of the distance of the swing of
the damper assembly.
b) A visual examination down into
the blast tube area should reveal
that no heat, flames or fumes are
backing up through the burner plate
area. If they are, the secondary
damper must be opened up once
again. Failure to remove the flame
or gases from the blast tube area
can cause a backfire as well as
cause premature failure of elec-
trodes, flame rods, and other burner
components.
c) A visual inspection down the
view port should also show the fire
completely covering the furnace
walls. If the fire is tunneling down
or is not to the outside wall of the
furnace, the efficiency will drop off .
Close the secondary air damper
until tunneling stops.
Primary Air Adjustment is located at the fan housing face
Secondary Air Adjustment 40-60 HP
Blast Tube
Viewing Port
Burner
Viewing Port
Secondary Air Adjustment 4-30 HP
23-O 4/00