24
I-17 / I-40 Manual and Spark Ignition
OUTER CONE I-17 (CONT.)
b. Pull the outer cone from the retainer slots in the
burner plate. See Fig. 22.
FIG. 22
OUTER CONE REMOVAL I-40
a. Using needle nose pliers or a standard screwdriver,
carefully pry up the outer combustion cones tabs
folded under the burner plate. See Fig. 23.
FIG. 23
b. Rotate the outer cone slightly so the notches in the
cone flange align to the formed retainers on the
burner plate. Lift and pull the cone from the burner.
plate. See Fig. 24.
FIG. 24
Notch
Retainer
Owner's Manual • I-17 / I-40
c. Regardless of heater model, once the outer cone
is removed, inspect the inner cone. See Fig. 25. If
the cone is in good condition, (cone weld seam not
split or tip is not missing) then clean using the com-
pressed air method. A bottle brush may also be run
down the venturi tube to force out any blockages.
Slot
Using air at the cone end, blow back any debris out
the control end of the venturi tube.
d. If the inner cone is damaged, remove the three
screws, nuts, and spacers securing the burner plate
to the heater. See Fig. 25
FIG. 25
Outercone Tabs
5. Remove the burner plate and replace the inner
cone. See Fig. 26. A replacement gasket must
be installed whenever the inner cone is removed.
Clean the surface to which the gasket is located
before installing replacement.
FIG. 26
Notch
Weld Seam
Inner Cone
Screw
Weld Seam
Tip
Gasket