Bradford White URG130T*N Series, Руководство по обслуживанию

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10
ECO Defender Series
10
Pilot Inspection, Testing and
Replacement
Step 1. Position gas control knob “OFF” position.
Step 2. Turn off gas supply to water heater.
Step 3. Remove outer jacket door and inner door per
service procedure ED-X on page 21.
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. Disconnect wire connections to the resettable thermal switch.
Step 7. Disconnect chamber door thermal sensor from gas control.
Step 8. Remove burner assembly from combustion chamber.
Step 9. Remove pilot assembly from burner (1/4” nut driver).
Step 10. Visually inspect igniter/flame sense wire for damage.
Replace pilot if damage is found.
Step 11. With a multi-meter set to ohms setting,
check continuity through igniter/flame
sense wire. Replace pilot if no continuity.
Step 12. Visually inspect igniter/flame sense
electrode for deterioration. Replace
pilot as necessary. Electrode should
not be in contact with pilot hood.
Step 13. Visually inspect igniter/flame sense
electrode for oxidation build up.
Carefully clean any oxidation using very
fine emery cloth.
Step 14. Visually inspect pilot tubing for kinks or
cracks. If damage is found, replace
pilot.
Step 15. 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 16. Reassemble pilot and install onto burner.
Step 17. Reinstall burner assembly to water heater.
Step 18. Restore gas supply and check for gas leaks.
Step 19. To resume operation, follow the instructions located on the lighting
instruction label or the lighting instructions located in the installation and
operation manual.