Pilot Inspection, Testing, And Replacement - Bradford White UPV Series Service Manual

UPV Service Procedure II – Pilot Inspection, Testing, and Replacement

Pilot Inspection, Testing, and Replacement

Step 1. Visually inspect igniter/flame sense
electrode for oxidation build up.
Carefully clean any oxidation using very
fine emery cloth.
Step 2. Remove pilot assembly from the burner
assembly (¼" nut driver).
Step 3. Visually inspect igniter/flame sense wire
for damage. Replace pilot if damage is
found.
Step 4. With a multi-meter set to ohms setting,
check continuity through igniter/flame
sense wire. Replace pilot if no continuity.
Step 5. Visually inspect igniter/flame sense electrode for deterioration. Replace pilot as necessary.
Electrode should not be in contact with pilot hood, if so, carefully adjust electrode to a gap
of distance of 3/32" (.09) from pilot hood.
Step 6. Visually inspect pilot tubing for kinks or cracks. If damage is found, replace pilot.
Step 7. Inspect pilot tubing and pilot orifice for blockage:
a. Remove ferrule nut from bottom of pilot assembly (7/16" wrench).
b. Remove pilot tube and pilot orifice.
c. Inspect pilot tubing and pilot orifice for blockage. Clean or replace as
necessary.
Step 8. Reassemble pilot and install on burner. Reinstall burner assembly to water heater per
Service Procedure XIV.
Step 9. Restore gas supply and check for gas leaks.
Step 10. To resume operation, follow the instruction located on the lighting instruction label or the
lighting instruction located in the installation and operation manual.
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