Maxi Comet Executive Exec-56-G, Instruction Manual

Page: 76 / 244

Preventive Maintenance Comet Executive Gas
4-18
Check and Clean Pilot Assembly
Periodic inspection and cleaning of the various
pilot assembly components helps ensure trouble-
free operation.
In order to service the pilot assembly, it will
be necessary to remove the burner. Make sure
the unit is completely COOL before beginning
this procedure.
NOTE:
Ta k e t h e t i m e t o
read through and understand
the entire procedure before
performing this work.
This procedure should be handled
by at least two qualified persons.
Using the “buddy system”
facilitates a quicker procedure
and decreases the risk of
an accident.
Required Tools
Allen wrench: 5/32”
C-clamp: large
Clean cloth
Compressed air
Denatured alcohol
Gloves
Pencil/marker
Pipe thread compound/Teflon
tape
Pipe wrench
Pliers
Sandpaper: 220 grit emery
Wrenches:
7/16”
1/2”
9/16” (2)
Figure 4-11: Disconnect the flame sensor and
ignition electrode wires.
B
C
A
Perform only when the unit is OFF
with power disconnected and COOL.
Remove Burner
1. Turn power OFF at the main disconnect
switch.
2. Turn OFF the gas supply to the unit.
3. Lockout and tagout both the electrical
and gas supplies following local work
rules and in compliance with government
standards.
4. Remove the protective backplate at the
rear of the unit. This piece should be
handled by two maintenance personnel.
5. Open both endframe doors.
6. In the left endframe, note the specific
connection point for the flame sensor wire
(Figure 4-11, A) and the ignition electrode
wire (B) to the ignition control.
7. Disconnect each wire.
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