Bradford White U-TW4-75S-76R-3N - Manual (Page 17)

U TTW SERVICE PROCEDURE II
Burner Operation Inspection,
Cleaning and Replacement
Page 17
At periodic intervals (not more than 6 months) a visual inspection should be made of the main burner for proper operation
and to insure no debris is accumulating.
Main burner should light smoothly from pilot and burn with a blue flame with a minimum of yellow tips. After
approximately 5 minutes of operation the burner screen will become radiant and the flame will soften and turn orange. If
the burner screen does not become radiant after 5 minutes of operation it must be cleaned (see burner cleaning procedure
below).
Main burner must be free from any debris accumulation that may affect burner operation (see burner cleaning procedure
below).
DANGER
Under no circumstances shall flammable materials be used or stored in the vicinity of the water heater. If
flammable vapors are present, a fire or explosion may result causing property damage, personal injury or
death.
WARNING
Inner door and burner components may be HOT when performing this operation. Take
necessary precaution to prevent personal injury.
¼” Hex Drive Manifold
Cover Screws
¼” Hex Drive Manifold
Bracket Screws
Manifold Cover
Main Burner Inspection, Cleaning and Replacement
Burner Cleaning
Step 1. Remove burner and inner door assembly per SERVICE PROCEDURE I, steps 3 through 4.
Step 2. Remove manifold cover from burner inner door by removing (2) ¼” hex drive screws and then sliding
manifold cover to the right. Use a stiff brush, compressed air and/or shop vacuum to remove any debris
build up from the manifold mount.
Step 3. Remove manifold brackets from burner by removing (4) ¼” hex drive screws.
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