TM 10-4520-259-13&P
CAUTION
The scanner is a sensitive device. Rough handling can damage the scanner and
result in possible failure of the flame safeguard control.
b.
Disconnect scanner (3).
c.
Remove three nuts (4) and three washers (5). Remove nozzle and electrode assembly (6) from burner
tube (7).
d.
Inspect inside of burner tube (7) for excessive damage.
e.
Remove four nuts (8) and four washers (9). Remove burner tube (7) and gasket (10) from water heater
(11).
f.
Unscrew and remove nozzle (15) and adapter (16) attached to nipple (17).
g.
Unscrew and remove spark plugs (12) with gaskets (13) from nozzle and electrode holder (14).
NOTE
Mark position of nipple with holder before removing to ensure proper position
during installation.
h.
Remove nipple (17) by loosening set screws (28). Remove elbow (18) from nipple.
i.
Unscrew and remove ignition sight tube (19 through 22) from holder (14).
CAUTION
Do not drop peep site. Glass may break.
j.
Unscrew and remove peep sight cap (19) from nipple (20).
k.
Remove peep site glass (21) and two peep sight gaskets (22). Separate gaskets from glass.
l.
Unscrew and remove close nipple (23) from coupling (24).
m. Unscrew and remove coupling (24) from bushing (25).
n.
Unscrew and remove bushing (25) from scanner tube (27).
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