A.O. Smith GAHH 40 100 External Inspection and Cleaning, Cleaning the Air Intake Chamber Screen

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EXTERNAL INSPECTION AND CLEANING

Cleaning the Air Intake Chamber Screen:

At least twice annually the air intake chamber screen should be inspected for any dust or debris that may have accumulated on the louvers.

NOTE: If the water heater is located in an area that is subjected to lint, pet hair or dirt, it may be necessary to check the air intake chamber screen more frequently.

Use a vacuum cleaner with a hose attachment to remove any dust or debris that may have accumulated on the screen.

Figure 24.

Air Intake Chamber Screen

Cleaning the Combustion Chamber and Air Diverter Assembly:

Follow procedure outlined in “Removing Inner Door/Manifold/Burner Assembly”, page 41.

Use a vacuum cleaner/shop vac to remove all loose debris in the combustion chamber. Use compressed air to clear any dust or debris that may have accumulated on the air diverter assembly.

Reassemble following the procedure under “Installing Inner Door/Manifold/Burner Assembly”, page 42.

Figure 25.

 

INNER DOOR/

 

MANIFOLD/BURNER

COMBUSTION

ASSEMBLY

 

CHAMBER

INSTALL

AIR DIVERTER

ASSEMBLY

 

REMOVE

 

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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 Know the Water HEATER’S Component Parts Electronic Control Display Upper ControlGas Control Valve/Thermostat Lower Control Burner/Manifold Door Assembly Pressure SwitchAir Intake Chamber Fan 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 CoolerUsing the Electronic Control Display Fault Code DiagnosticsFault Code Retrieval 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 YESExternal Inspection and Cleaning Cleaning the Air Intake Chamber ScreenCleaning the Combustion Chamber and Air Diverter Assembly Electronic Control Display Removal / Replacement Installing the Electronic Control DisplayRemoving the Electronic Control Display Powered Anode ROD Removal / Replacement Removing the Powered Anode RodInstalling the Powered Anode Rod Pressure Switch Removal / Replacement Removing the Pressure SwitchInstalling 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