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PILOT ASSEMBLY INSPECTION,
CLEANING AND REPLACEMENT
Step 1. Turn off gas supply to water heater. Rotate knob
of combination thermostat/gas valve
to “OFF” position.
Step 2. Remove outer jacket door.
Step 3. Slide open inner combustion chamber door.
Step 4 Disconnect thermocouple (3/8" wrench), pilot tube (7/16" wrench),
and feedline (¾" wench) from combination thermostat/gas valve.
NOTE: Feedline nut for natural gas control
uses right hand threads, LP control uses left hand thread.
Step 5 Remove burner assembly from combustion chamber.
Step 6. Remove pilot assembly from feedline (¼" drive tool)
Step 7. Inspect pilot for the following:
a) Primary air openings for blockage. Must be free from any
debris (dirt, lint, etc).
b) Kinks or cracks in the pilot tube. If found,
the pilot must be replaced.
Step 8. Inspect pilot orifice:
a) Remove ½" nut from bottom of pilot assembly.
b) Remove pilot tube and pilot orifice.
c) inspect pilot orifice for blockage, must be cleaned or replaced.
SERVICE PROCEDURE AG-II
Pilot Assembly Inspection, Cleaning
and Replacement
Step 9. Install pilot assembly to feedline, secure with screw from step 7.
Step 10. Re-Install burner assembly into combustion chamber, connect feedline, pilot tube and thermocouple
to combination thermostat/gas valve.
Step 11. Slide inner combustion chamber door closed and re-attach outer jacket door.
Step 12. To resume operation follow the instructions located on the lighting instruction label or the lighting
instructions located in the installation and operation manual.
Page 5
Primary Air
Opening
R
F
or White Rodgers Control,
depress knob slightly and rotate
clockwise to the “OFF” position.
For Robertshaw Control, rotate
k
nob clockwise to the “OFF”
p
osition.
Pilot Orifice
Feedline
Nut
5