18
UPV Series
18
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 XIII on page 35.
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.
