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Burner Motor Brush Inspection
Electric Eye and Fuse Inspection
Diesel Burner - Electric Eye Inspection
The diesel burner is equipped with an electronic eye which detects the presence of a
flame. If the eye does not detect a flame after ignition, it will shut down the burner.
B
C
D
A
Primary Control
Periodically this eye will get covered
with soot or dirt from the burner. If your
burner lights and then shuts down
immediately, you can normally expect
the problem to be a dirty electric eye.
To clean the eye, simply loosen the two
retaining clip screws (A) and rotate the
clips which hold the hinged spark box
(B) to the burner. Gently wipe the eye
(C) with a soft cloth and reattach the
spark box.
After cleaning the eye, if the burner will
not stay ignited after initial firing, check
fuse located inside the primary control
box. You can open the box by loosen-
ing the two screws (D) and removing the
box.
Due to the high current draw of the burner motor, it is advised to inspect the brushes for
excessive wear every 100 hours of operation. If the brushes are worn out completely it will
stop the motor and typically damage or destroy the ignition transformer assembly.
The brushes can be inspected and installed in a matter of minutes as follows:
C
B
1/8"
1) Remove the brush caps (A) with a
standard straight slot screw driver.
2) Remove the brushes (B) and inspect.
If there is less than 1/8" of brush re-
maining, replace it immediately. If not,
reinstall existing brush.
3) Be sure the radius (C) of the brush
follows the curvature of the motor as
shown below.
4) When the brushes are worn close to 1/
8", check frequently to avoid failure.
A
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