48
I-EEDU (02-21) 150492-A
MAINTENANCE—CONTINUED
Burner Rack and Pilot Maintenance—Continued
Figure 35. Pilot Location and Installation
d . Remove the pilot orifice and clean with air pressure .
e . Check and clean the aeration slot in the pilot burner .
f . Clean metal sensing probe and pilot hood with emery cloth and wipe off ceramic insulator .
g . Check spark gap and ensure that gap is maintained to be 0 .1 inch as shown in
.
DETAIL B
Burner
Rear
Support
2-3/4” (70mm)
of burner
of pilot
and sensor
3/4” (±1/32”)
19mm (±.8mm)
PILOT HOLE COVER PLATE
DETAIL A
Figure 36. Pilot Spark Gap
h . After pilot is cleaned, blow away any dirt using compressed air .
i . Adjust pilot flame to approximately 1-1/4 inches by removing capscrew from combination valve adjustment
screw and turning screw .
⚠ WARNING ⚠
Do not touch pilot spark wire and pilot electrode when energized due to high voltage.
NOTE: No periodic maintenance of the ignition control box is required. However, each season the
lead wires should be checked for insulation deterioration and good connections. Proper opera-
tion of the electronic spark ignition system requires a minimum flame signal of 0.2 microamps as
measured by a microampmeter. Do not attempt to disassemble the ignition controller. There are
no field-replaceable components in the control enclosure.
j . Check electronic spark ignition wire leads to ensure good connections and no insulation damage .
