Bradford-White Corp U4TW40T*FRN Manual De Usuario

 Page 49 

screws.  Verify that both the left and right side inner doors are properly positioned and 
sealed against the combustion chamber. 

Step 8.  

Re-install the outer door. 

Step 9. 

To resume operation, follow the instructions located on the water heater 

lighting instruction label.  Or, use the lighting instructions located in the water heater 
installation and operating manual.

Step 1. 

Move the gas control power switch to the “OFF” position and unplug the 

water heater from the wall outlet. 

Step 2. 

Remove the outer door. 

Step 3. 

Remove the right side inner door per the Inner Door Removal Procedure 

on page 32. 

Step 4. 

Disconnect the pilot tube using a 7/16” wrench and the main burner 

feedline with a 3/4” wrench from the gas control. 

Step 5. 

Disconnect the spark igniter/flame sensor wire from gas control. 

Step 6. 

Remove the burner assembly from the combustion chamber. 

Step 7. 

Clean the ScreenLok

®

 flame arrestor using a stiff brush, compressed air, 

and/or a shop vacuum to remove any scale or other debris accumulation.  Using a soft 
brush, clear jacket openings from any dirt, dust, restrictions, or other obstructions. 

Step 8. 

Remove any debris from the burner assembly following the Burner 

Cleaning Procedure on page 15. 

Step 9. 

Re-install the burner assembly. 

Step 10. 

Reconnect the main and pilot tubing and spark igniter wire to the gas 

control.

Step 11. 

Re-install the inner door per the Inner Door Installation with Gasket Pro-

cedure on page 34. 

Step 12. 

To resume operation, follow the instructions located on the water heater 

lighting instruction label.  Or, use the lighting instructions located in the water heater 
installation and operating manual.

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