A.O. Smith 12 40GPC T 100, PCG6240T403NOV 100 Installing the Fan in the Air Intake Chamber Box

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Installing the Fan in the Air Intake Chamber Box:

11.Plug the electrical connections of the new fan into the wiring harness: Align the electrical connections in such a position as to ensure the locking portions of the connections are on the same side. Gently push the electrical connectors together until the snap lock on the wiring harness engages the angular lock on the fan connector. Do Not use undue force in pushing these connectors together (Figure 71). (Note: Connectors are designed in such a manner if the connection is not properly aligned they will not lock together).

12.Place the new fan inside the air intake chamber box. It is imperative that the square portion of the fan air outlet be placed inside the raised square portion of the air intake chamber of the fan compartment (Figure 72).

13.Ensuring the new fan is properly aligned in the air intake chamber, secure the fan in place using the 2 screws removed in step 7 (Figure 72).

14.Route the wiring inside the fan box to the outer edge of the fan in such a manner to ensure it will not be pinched or damaged upon installation of the air intake screen (Figure 72).

15.Install the air intake chamber screen, ensuring that the prongs of the lower portion of the air intake chamber screen are in place in the holding slots. Using the 2 screws removed in step 4, secure the air intake chamber screen (Figure 73).

16.Turn on the electrical and the gas supplies to the water heater. Plug in the electric connection from the transformer to the electric outlet (Figure 69).

17.Restart the water heater by following the directions on the “Lighting and Operating Instructions” label located on the front of the water heater.

18.Upon verifying proper operation of the water heater, replace the manifold cover/outer door.

Figure 71.

FAN

GENTLY PUSH THE ELECTRICAL

CONNECTORS TOGETHER UNTIL

IT IS SNAP LOCKED.

Figure 72.

INSTALL THE FAN USING THE

 

TWO SCREWS REMOVED

FAN

EARLIER.

 

Figure 73.

INSTALL THE AIR INTAKE

CHAMBER SCREEN.

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Contents Models ALL Technical and Warranty Questions Service Handbook Tools Required for servicing gas modelsFire or Explosion Harzard Breathing Hazard Carbon Monoxide GasTable of Contents Basic Installation & Operation Installation of Residential GAS Water HeaterCombustion AIR and Vent System Requirements Carbon Monoxide WarningReference Vent Connectors Connector must be firmly attached Gas Control Valve/Thermostat Lower Control Know the Water HEATER’S Component PartsElectronic Control Display Upper Control Air Intake Chamber Fan Burner/Manifold Door AssemblyPressure Switch Power Anode Rod HOW the Water HEATER’S Component Parts are ConnectedWater Heater Operation Sequence of OperationFILLING, Draining and Flushing the Water Heater Tank For Your Safety Read Before Operating Lighting InstructionsAdjusting the Temperature on Electronic Control Display Hotter CoolerFault Code Retrieval Using the Electronic Control DisplayFault Code Diagnostics Reviewing Fault Codes FV-Sense Reset SequenceElectronic Control Display Troubleshooting Electronic Control DisplayControl Display Troubleshooting Control Display Status Problem SolutionLDO-SW, OPEN, and Clean Screen Troubleshooting Flowchart YESCleaning the Combustion Chamber and Air Diverter Assembly External Inspection and CleaningCleaning the Air Intake Chamber Screen Removing the Electronic Control Display Electronic Control Display Removal / ReplacementInstalling the Electronic Control Display Powered Anode ROD Removal / Replacement Removing the Powered Anode RodInstalling the Powered Anode Rod Installing the Pressure Switch Pressure Switch Removal / ReplacementRemoving the Pressure Switch Transformer Removal / Replacement Removing the TransformerInstalling the New Transformer AIR Intake Chamber BOX Removal / Replacement Removing the Air Intake Chamber BoxInstalling the Air Intake Chamber Box Installing the Fan in the Air Intake Chamber Box Wiring Harness Removal / Replacement PressureReplacing the Wiring Harness Installing the New Wiring HarnessUndue Pressure or Sudden Force AIR Intake Chamber FAN Removal / Replacement Removing the Fan from the Air Intake ChamberInstalling the Fan in the Air Intake Chamber Box Pressure Tubing Removal / Replacement Installing the Air Intake Chamber Box Inner DOOR/MANIFOLD/BURNER Assembly Removal / Replacement GAS ControlInstallation Caution Must Be Taken TABFlame SENSE/HOT Surface Igniter Removal / Replacement Replacing the Flame Sense/Hot Surface Igniter AssemblyBurner Removal / Replacement Installing New Burner Removing Old BurnerPressure Burner Orifice Removal / Replacement Installing New Burner Orifice Removing Old Burner OrificeReinstalling The Inner Door/Manifold/Burner Assembly GAS Control VALVE/THERMOSTAT Removal / Replacement Removing the Gas Control Valve/ThermostatInstalling the Gas Control Valve/Thermostat Checking the GAS Supply Pressure Checking the Gas Supply PressureGAS Water Heater Sizing Guide Leakage CheckpointsGeneral Information Formulas and ConversionsMM millimeters =Inches X