Maxi Comet Executive Exec-56-G, Instruction Manual, Page: 78 / 244

Preventive Maintenance Comet Executive Gas
4-20
Service Pilot Assembly
NOTE: W i t h t h e b u r n e r
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 flame detector.
F
B
D
A
E
C
1. Remove the pilot gas tube (Figure 4-13,
A).
CAUTION
Do not attempt to clean the
orifice by inserting anything
into the openings. These
are precisely sized and any
alteration will affect machine
operation, necessitating
replacement of the orifice.
2. Remove the pilot gas orifice (Figure 4-13,
B) and put into denatured alcohol. Allow
to soak for about 4 hours.
3. Remove the orifice from the alcohol and
thoroughly rinse with water; then, blow
dry with compressed air.
4. Replace the orifice and re-connect the gas
pilot tube.
5. Check the condition of the ignition elec-
trode (Figure 4-13, C) and the flame 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 flange (Figure 4-13, E). It should
be about the thickness of a dime (1.35-1.4
mm).
8. Make sure the flame sensor is straight
and that its wire (Figure 4-13, F) is firmly
connected.
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