A.O. Smith Water Heater Replacing the Thermocouple, Replacing the Pilot/Pilot Tube Assembly

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).

PILOT ASSEMBLY

SCREWS,

BURNER

(BOTTOM VIEW)

FIGURE 24.

Replacing the Thermocouple

1.Remove the manifold/burner assembly as directed previously.

2.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).

3.Remove the burner, see Removing the Burner from the Manifold/Burner Assembly.

4.Pull the thermocouple from the pilot assembly (Figure 26).

IMPORTANT: Be careful not to bend or alter the position of the pilot assembly components.

5.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.

6.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.

7.Re-attach the burner. Note the orientation of the buner (Figure 24.)

8.See Replacing the Manifold/Burner Assembly.

FERRULE NUT

_" IGNITER WIRE

THERMOCOUPL_

PILOT PILOT BRACKET

OT ETwF, ,NGB

"RETAINER

° ' i'

MANIFOLD TUBE

PILOT TUBE

\ MANIFOLD/BURNER

I_ _ TWO PIECE

I_'--W,RECONNECTORDOOR OPENING

FIGURE 25.

S

FIGURE 26.

Replacing the Pilot/Pilot Tube Assembly

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 located underneath the burner. See Figure 24.

4.Remove and keep the screw securing the pilot assembly to the pilot bracket. (Figure 27)

5.Remove and keep the old pilot/pilot tube assembly.

6.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)

SCREW

OLD PILOT ASSEMBLY,

 

OTHER FITTINGS

PILOT TUBE

NOT

SHOWN

 

FOR

CLARITY

IGNITER WIRE

THERMOCOUPLEFIRST 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)

PILOT TUBE

IGNITER WIRE

THERMOCOUPLE

TWO PIECE WIRE CONNECTOR

FIGURE 28.

26

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Contents Installer SmithWater Important Definitions Fire Hazard Improper installation and use may result in property damageFire or Explosion Harzard GET to Know Your Water Heater GAS Models Consumer Responsibilities Important Information About This Water HeaterConsumer Information Location Requirements Site LocationClearances and Accessibility Pmpey Damage HazardGas Requirements Gas Pressure TestingGas Pressure Gas PipingLP Gas Only Explosion HazardCarbon Monoxide Warning Unconfined SpaceConfined Space RoomLouvers and Grilles All Air from Inside the BuildingAll Air from Outdoors Draft Hood Installation PER OpenChimney Connection Vent ConnectorsVent Pipe Size Piping Installation MA,NTA,N\Propey Damage Hazard Closed System/Thermal ExpansionRelief Valve and Pipe Insulation Some Models Temperature and Pressure Relief Valve Explosion HarzardTemperature & Pressure Relief Valve Combination Space Heating/Potable Water SystemSolar Installation AIRGas Supply and Piping Vent Pipe SystemWater System Piping Lighting Instructions BeforeToturnoffgastoappliance ForyoursafetyreadbeforelightingChecking the Draft Burn HazardEmergency Shut Down Water Temperature RegulationBurner Flames White Rodgers ValvesCondensation Operational ConditionsProperty Damage Hazard Draining and Flushing Routine Preventive MaintenanceAnode Rod/Water Odor Manualrelief Replacement PartsRemoving the Burner from the Manifold/ Burner Assembly ThermalReplacing the Pilot/Pilot Tube Assembly Replacing the ThermocoupleCleaning the Combustion Chamber and Flame-arrestor Replacing the Manifold/Burner AssemblyExternal Inspection & Cleaning of the Base-Ring Filter Removing and Replacing the Gas Control Valve/Thermostat Testing the Igniter SystemPiezoelectric Igniter System FVlR System Operational Checklist Possible CausesProblem Thermostat set too highYES Repair Parts List Listed Parts Kits and Illustrations Page Limited Residential GAS Warranty Conditions and ExceptionsLimitation on Implied Warranties Claim ProcedureInstallation Information Disclaimers

Water Heater specifications

A.O. Smith is a renowned name in the water heating industry, celebrated for its commitment to innovation, quality, and efficiency. Their water heaters are designed to cater to a wide variety of needs, making them suitable for both residential and commercial applications. The main features of A.O. Smith water heaters are tailored to ensure optimal performance, convenience, and reliability.

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In conclusion, A.O. Smith water heaters represent a blend of innovation, efficiency, durability, and safety. With various models available that cater to different heating needs and preferences, A.O. Smith continues to remain a trusted choice for consumers seeking reliable hot water solutions.
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