A.O. Smith Water Heater - Manual (Page 26)

2 . Check the burner to see if it is dirty or clogged. The burner
may be cleaned with soap and hot water (Figure 24).
FIGURE 24.
Replacing the Thermocouple
1
.
Remove the manifold/burner assembly as directed
previously.
Remove the retainer clip from the back of the two
piece wire connector and remove the two piece wire
connector from the manifold door (Figure 25).
Remove the burner, see Removing the Burner from the
Manifold/Burner Assembly.
Pull the thermocouple from the pilot assembly (Figure 26).
IMPORTANT: Be careful not to bend or alter the position of
the pilot assembly components.
Insert the thermocouple tip into the holes provided in
the pilot bracket until it clicks into place. NOTE: The
base of the thermocouple must be flush with the base
of the pilot bracket.
Position the new thermocouple through the larger
opening of the two piece wire connector (Figure 25).
Be sure igniter wire is positioned through the small
opening of the two piece wire connector.
Re-attach the burner. Note the orientation of the buner
(Figure 24.)
See Replacing the Manifold/Burner Assembly.
2
.
3.
4.
5.
6
.
7.
8
.
//
1. Remove the manifold/burner assembly. See Removing
the Burner from the Manifold/Burner Assembly.
2. Lift the retainer clip straight up from the back of the two
piece wire connector (using a flat-blade screwdriver),
then remove the two piece wire connector from the
manifold door (Figure 25.)
IMPORTANT: Be careful not to bend or alter the position of
the pilot tube, it will be used as a bending template for the
new assembly.
3. Take off the burner by removing the two (2) screws
iocated underneath the burner. See Figure 24.
Remove and keep the screw securing the pilot
assembly to the pilot bracket. (Figure 27)
Remove and keep the old pilot/pilot tube assembly.
Using the old pilot/pilot tube assembly as a guide, bend
the new pilot tube and new thermocouple to match the
old ones. NOTE: Make only the bends closest to the
pilot before going to the next step. (Figure 27)
Replacing the Pilot/ Pilot Tube Assembly
4.
5.
6
.
OLD PILOT ASSEMBLY
PILOT TUBE
IGNITER WIRE
THERMOCOUPLE
OTHER FITTINGS
NOT SHOWN
FOR CLARITY
FIRST BEND(S)
FIGURE 27.
7. Route the new pilot tube, thermocouple, and igniter wire
through the manifold/burner door opening. (Figure 25)
8. Re-attach the pilot assembly to the pilot bracket and
secure using the screw removed earlier.
9. Position the new pilot tube through the largest opening
of the two piece wire connector. NOTE: The largest
opening should be located at the top position. The
igniter wire should be located in the middle opening
and thermocouple in the bottom opening. (Figure 28)
//
FIGURE 28.
FIGURE 26.
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