Maxi Comet Executive Exec-66-G - Page 78

Preventive Maintenance Comet Executive Gas
4-20
Service Pilot Assembly
NOTE: With the burner
removed, examine the burner tips
to determine whether they need
cleaning. If so, refer to Burner Tip
Maintenance on page 7-32.
Figure 4-13: Check the condition of the ignition
electrode and the ame detector.
F
B
D
A
E
C
1. Remove the pilot gas tube (Figure 4-13,
A).
CAUTION
Do not attempt to clean the
orice by inserting anything
into the openings. These
are precisely sized and any
alteration will a󰀨ect machine
operation, necessitating
replacement of the orice.
2. Remove the pilot gas orice (Figure 4-13,
B) and put into denatured alcohol. Allow
to soak for about 4 hours.
3. Remove the orice from the alcohol and
thoroughly rinse with water; then, blow
dry with compressed air.
4. Replace the orice and re-connect the gas
pilot tube.
5. Check the condition of the ignition elec-
trode (Figure 4-13, C) and the ame sensor
(D). Make sure there is no corrosion and
the ceramic insulation is not cracked or
otherwise damaged.
6. If necessary, lightly go over with 220-grit
emery paper.
7. Check the gap between the electrode and
pilot gas ange (Figure 4-13, E). It should
be about the thickness of a dime (1.35-1.4
mm).
8. Make sure the ame sensor is straight
and that its wire (Figure 4-13, F) is rmly
connected.
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