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PDV Series
Pilot Testing and Replacement
Step 1.
Position gas control power
switch to the "OFF" position
and unplug heater from wall
outlet.
Step 2.
Turn off gas supply to water
heater.
Step 3.
Remove outer jacket door and inner door per
service procedure XIII on page 34.
Step 4.
Disconnect pilot tubing nut (7/16" wrench) and
feedline nut (3/4" wrench) from gas control.
Step 5.
Disconnect igniter/flame sense wire from gas control.
Step 6.
Remove burner assembly from combustion chamber.
Step 7.
Remove pilot assembly from feedline (1/4" nut driver).
Step 8.
Visually inspect igniter/flame sense wire for damage.
found.
Step 9.
With a multi-meter set to ohms setting, check
continuity through igniter/flame sense wire. Replace
pilot if no continuity.
Step 10.
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 11.
Visually inspect igniter/flame sense
electrode for oxidation build up. Carefully
clean any oxidation using very fine emery
cloth.
Step 12.
Visually inspect pilot tubing for kinks or
cracks. If damage is found, replace pilot.
Step 13.
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 14.
Reassemble pilot and install on feedline. Reinstall burner assembly to water
heater. Restore gas supply and check for gas leaks.
Step 15.
To resume operation, follow the instruction located on the lighting
instruction label or the lighting instruction located in the installation and
operation manual.
Replace pilot if damage is
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