Bradford White URG2PV75H N Series Service Manual page 18

UPV75 Series
Pilot Inspection, Testing and Replacement (cont.)
Step 13.Visually inspect
igniter/flame sense
electrode for oxidation
build up. Carefully clean
any oxidation using very
fine emery cloth.
Step 14.Remove pilot assembly
from the burner
assembly (¼" nut driver).
Step 15.Visually inspect
igniter/flame sense wire
for damage. Replace
pilot if damage is found.
Step 16.With a multi-meter set to ohms setting, check continuity through igniter/flame
sense wire. Replace pilot if no continuity.
Step 17.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
Step 18.Visually inspect pilot tubing for kinks or cracks. If damage is found, replace
pilot.
Step 19.Inspect pilot tubing and pilot orifice for blockage:
a. Remove ferrule nut from bottom of pilot assembly (
b. Remove pilot tube and pilot orifice.
c. Inspect pilot tubing and pilot orifice for blockage. Clean or replace as
necessary.
Step 20.Reassemble pilot and install on burner. Reinstall burner assembly to water
heater. Restore gas supply and check for gas leaks.
Step 21.To resume operation, follow the instruction located on the lighting instruction
label or the lighting instruction located in the installation and operation manual
18
18
UPV75 SERVICE PROCEDURE II
Pilot Inspection, Testing and Replacement
" (.09) from pilot hood.
3 /
32
" wrench).
7 /
16