Bradford White U-TW4-75S-76R-3N - Manual (Page 24)

Page 24
Pilot Inspection, Testing and Replacement (cont’d)
Step 8. Remove the burner assembly from the com-
bustion chamber.
Step 9. Remove the pilot assembly from the main
feedline using a 1/4" nut driver.
Step 10. Visually inspect the spark igniter/flame sense wire for damage.
Replace the pilot assembly, if damage is found.
Step 11. With a multi-meter set to the ohms setting,
check continuity through the spark igniter/flame sense
wire. Replace the pilot, if there is no continuity.
Step 12. Visually inspect the spark igniter/flame sense electrode for de-
terioration. Replace the pilot assembly, if necessary. The electrode should
not be in contact with pilot hood. If it is in contact with the pilot hood,
carefully adjust electrode to a gap distance of 3/32" from the pilot hood.
Step 13. Visually inspect the spark igniter/flame sense electrode for oxi-
dation build up. Carefully clean any oxidation using very fine emery cloth.
Step 14. Visually inspect the pilot tubing for kinks or cracks. If damage
is found, replace the pilot assembly.
Pilot Maintenance
Multi-meter
Burner assembly
Pilot assembly
1/4” nut driver
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