Bradford-White Corp D4504S*F(BN ユーザーズマニュアル

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Burner Cleaning Procedure (cont’d) 
Step 5. 

Remove the (4) 1/4” hex drive screws holding the 

right side inner door in place. 

Step 6.

Disconnect the pilot tube 

using a 7/16” wrench and the main burner
feedline with a 3/4” wrench from the gas 
control.

Step 7. 

Disconnect the spark igniter/flame sensor wire from 

gas control. 

Step 8. 

Remove the burner assembly from the combustion 

chamber.

Step 9.

Thoroughly inspect the burner surface area and 

burner port area and remove any loose debris. 
Step 10. 

Unscrew the burner from the main burner orifice. 

Step 11. 

Remove the main burner orifice from the main 

feedline using a 1/2” wrench.  Inspect the orifice and clean or 
replace, if necessary.

(4) 1/4” hex drive 

screws

Right side 

inner door 

Pilot and main 

feedlines 

Spark igniter/flame 

sensor wire 

Gas control

Burner assembly

Burner surface area 

and burner ports 

1/2” wrench 

Main burner 

orifice

Main feedline

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