Service Manual

UTTW SERVICE PROCEDURE III

Pilot testing, Cleaning and Replacement

Page 19

Pilot Assembly Inspection, Testing

and Replacement

Step1. Position gas control power switch to the “OFF”

position and unplug water heater from wall outlet.

Step 2.Remove outer jacket door.

Step3. Remove burner and rightside of inner door

per SERVICE PROCEDURE I, steps

3 and 4.

Step4. Remove burner assembly from combustion chamber.

Step5. Remove pilot/electrodeassembly from burner (¼" drive tool)

Step6. Inspect pilot for kinks or cracks in the pilottube.

If found, the pilot must be replaced.

Step7. Inspec

t pilot orifice:

a)Remove 7/16" nut from bottom of pilot assembly.

b) Remove pilottubeand pilot orifice.

c) inspect pilot orifice for blockage,must be cleanedorreplaced.

Step8. Install pilot/electrodeassembly toburner, s

ecure with screwfrom step5.

Step9. Install burner and inner door per SERVICE PROCEDURE I, steps 5 through 16.

Step 10. To resume operation follow the instructions locatedonthe lighting instruction labelorthe lighting instr

uctions

locatedinthe installation and operation manual.

7/16" Pilot

Assembly Nut

Gas Control shown in the “OFF” position

Pilot

Location

¼” Hex Drive

Pilot Screw

Pilot Orifice

Pilot Tube