Bradford White UDH Series Service Manual page 22

Uds / udh series ultra low nox direct vent water heaters
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The Bradford White
Step 4.
Disconnect (unscrew) feedline from the main burner door.
Step 5.
Remove main burner orifice from feed line (3/8" wrench). Inspect and
clean if necessary
Step 6.
Remove pilot assembly, refer to SERVICE PROCEDURE III
for cleaning and inspection.
Step 7.
Reassemble burner.
Step 8.
Reinstall burner and inner door per SERVICE PROCEDURE I,
steps 9 through 19.
Step 9.
To resume operation, follow the instructions located on the lighting instruction label or the lighting
instructions located in the installation and operation manual.
22
SERVICE PROCEDURE VI
Burner Operation Inspection, Adjustment
Cleaning and Replacement
Feedline
Main Burner Orifice
22

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