A.O. Smith GAHH 50 100, PCG6240T403NOV 100, GAHH 40 100 Removing Old Burner, Installing New Burner

Page 45

Removing Old Burner :

11.After noting the position of the condensation drain hole on the top of the burner. Turn the inner door/ manifold/burner assembly upside. Using a phillips head screwdriver remove the 2 screws attaching the burner to the manifold pipe (saving screws for reinstallation later) (Figure 99).

Installing New Burner :

12.Care MUST be taken to ensure the burner is installed correctly on the inner door/manifold assembly. Position the new burner upside down with the orientation of the burner’s condensation drain as shown in illustration (Figure 99).

13.Align the screw holes on the inner door/manifold assembly. Using the two screws removed in step 11, installed the new burner to the inner door/ manifold assembly (rotate the assembly to visually check the top portion of the burner assembly and confirm the orientation of the condensation drain hole on the top of the burner is toward the back as shown in the illustration) (Figure 99).

Installation Caution Must Be Taken:

14.Prior to installing the new inner door/manifold/ burner assembly, look inside the burner chamber to fully understand the correct positioning of the burner assembly and burner manifold tab. It may be necessary to use a flashlight to ensure correct placement. Care must be taken so as to not damage any electrical wiring, components or the air pressure tubing as you are installing the new inner door/manifold/burner assembly.

Extra caution should be taken to ensure that electrical wiring, air hose, fiberglass insulation nor any other object is between door gasket and combustion chamber shield.

Reinstalling The Inner Door/Manifold/Burner Assembly

15.Insert the manifold/burner assembly in the burner chamber compartment, making sure that the tip of burner manifold tab engages in the slot of the bracket (Figure 98).

The tip end of the burner manifold MUST be placed in the slotted portion under the condensation pan to obtain proper installation (Figure 98).

Figure 97.

1/4” HEX

HEAD SCREW

Figure 98.

 

INNER DOOR/

 

MANIFOLD/BURNER

 

ASSEMBLY

 

 

SLOT

INSTALL

BURNER’S

TIP END

REMOVE

TAB

 

Figure 99.

BURNER’S

CONDENSATION DRAIN

TOP VIEW

ORIENTATION OF SCOOP

 

TO BE ON THE SAME SIDE

VIEW PORT

AS THE VIEW PORT

 

TWO SCREWS

 

BURNER’S

 

CONDENSATION DRAIN

BOTTOM VIEW

 

Figure 100.

IMPORTANT:

 

 

WHEN BRUSHING ON AN

 

GAS CONTROL

APPROVED NONCORROSIVE

 

LEAK DETECTION SOLUTION,

 

VALVE/THERMOSTAT

DO NOT SPLASH SOLUTION

 

 

ONTO ELECTRICAL CON-

 

 

NECTIONS.

 

 

 

 

PRESSURE

MANIFOLD TUBE

 

SWITCH/FAN,

 

FV SENSOR

POWER SUPPLY

IGNITER/

CONNECTOR

 

TRANSFORMER

FLAME

 

CONNECTOR

SENSE

DISPLAY, ANODE

 

CONNECTOR

ROD CONNECTOR

45

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Contents Models ALL Technical and Warranty Questions Tools Required for servicing gas models Service HandbookBreathing Hazard Carbon Monoxide Gas Fire or Explosion HarzardTable of Contents Installation of Residential GAS Water Heater Basic Installation & OperationCarbon Monoxide Warning Combustion AIR and Vent System RequirementsReference 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 HOW the Water HEATER’S Component Parts are Connected Power Anode RodSequence of Operation Water Heater OperationFILLING, Draining and Flushing the Water Heater Tank Lighting Instructions For Your Safety Read Before OperatingHotter Cooler Adjusting the Temperature on Electronic Control DisplayUsing the Electronic Control Display Fault Code DiagnosticsFault Code Retrieval FV-Sense Reset Sequence Reviewing Fault CodesElectronic Control Display Electronic Control Display TroubleshootingControl Display Status Problem Solution Control Display TroubleshootingLDO-SW, OPEN, and Clean Screen YES Troubleshooting FlowchartExternal 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 Removing the Powered Anode Rod Powered Anode ROD Removal / ReplacementInstalling the Powered Anode Rod Pressure Switch Removal / Replacement Removing the Pressure SwitchInstalling the Pressure Switch Removing the Transformer Transformer Removal / ReplacementInstalling the New Transformer Removing the Air Intake Chamber Box AIR Intake Chamber BOX Removal / ReplacementInstalling the Air Intake Chamber Box Installing the Fan in the Air Intake Chamber Box Pressure Wiring Harness Removal / ReplacementInstalling the New Wiring Harness Replacing the Wiring HarnessUndue Pressure or Sudden Force Removing the Fan from the Air Intake Chamber AIR Intake Chamber FAN Removal / ReplacementInstalling the Fan in the Air Intake Chamber Box Pressure Tubing Removal / Replacement Installing the Air Intake Chamber Box GAS Control Inner DOOR/MANIFOLD/BURNER Assembly Removal / ReplacementTAB Installation Caution Must Be TakenReplacing the Flame Sense/Hot Surface Igniter Assembly Flame SENSE/HOT Surface Igniter Removal / ReplacementBurner Removal / Replacement Removing Old Burner Installing New BurnerPressure Burner Orifice Removal / Replacement Removing Old Burner Orifice Installing New Burner OrificeReinstalling The Inner Door/Manifold/Burner Assembly Removing the Gas Control Valve/Thermostat GAS Control VALVE/THERMOSTAT Removal / ReplacementInstalling the Gas Control Valve/Thermostat Checking the Gas Supply Pressure Checking the GAS Supply PressureLeakage Checkpoints GAS Water Heater Sizing GuideFormulas and Conversions General InformationMM millimeters =Inches X