Bradford White U-TW4-75S-76R-3N - Manual (Page 19)

U TTW SERVICE PROCEDURE III
Pilot testing, Cleaning and Replacement
Page 19
Pilot Assembly Inspection, Testing
and Replacement
Step 1. Position gas control power switch to the “OFF”
position and unplug water heater from wall outlet.
Step 2. Remove outer jacket door.
Step 3. Remove burner and right side of inner door
per SERVICE PROCEDURE I, steps
3 and 4.
Step 4. Remove burner assembly from combustion chamber.
Step 5. Remove pilot/electrode assembly from burner (¼" drive tool)
Step 6. Inspect pilot for kinks or cracks in the pilot tube.
If found, the pilot must be replaced.
Step 7. Inspect pilot orifice:
a) Remove 7/16" nut from bottom of pilot assembly.
b) Remove pilot tube and pilot orifice.
c) inspect pilot orifice for blockage, must be cleaned or replaced.
Step 8. Install pilot/electrode assembly to burner, secure with screw from step 5.
Step 9. Install burner and inner door per SERVICE PROCEDURE I, steps 5 through 16.
Step 10. To resume operation follow the instructions located on the lighting instruction label or the lighting instructions
located in the 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
R
19