Bradford White U-TW4-75S-76R-3N - Manual (Page 15)

Re-installation of Inner Door With Gasket
WARNING
Stripped fastener connections may allow
for seal breach of inner door. A seal
breach may result in a fire or explosion
causing property damage, personal injury
or death. Do not over tighten screws in
steps 9, 11 and 12.
If a fastener connection is stripped,
contact the manufacturer listed on the
water heater rating plate.
Step 8. Clean any residual gasket residue or other debris
from combustion chamber surface before
re-installing the inner door/gasket assembly.
Step 9. Place the burner door into position first. Tighten
the feed line nut to the gas control. Use the ¼”
hex drive screw without the built-in washer to
secure burner door to the chamber at position #1.
Use the ¼” hex drive screws with the built-in
washer to secure the door at positions #2 & #3
(see photos 4&5, on page 14).
DO NOT OVER TIGHTEN SCREWS.
Inner Door Gasket Replacement Procedure
WARNING
If the information in these instructions is not
followed exactly, a fire or explosion may result causing
property damage, personal injury or death.
Step 6. After inspection of inner door as noted in step 5, completely remove gasket and adhesive residue from burner
door and right side inner door as needed.
Step 7. Use RTV sealant (recommended bead size 1/8") to secure the inner door gasket to the inner door sections
(right & burner). The burner door gasket must be sliced in the location shown on the illustration below in
order to slide the gasket over the burner venturi. Refer to illustration below for proper RTV sealant
application. Note the overlap configuration in the flange area of the inner door. Ensure that the chamfer of
the gasket faces outward. Set the flange section first, this will help to achieve the proper overlap position.
U TTW SERVICE PROCEDURE I
Burner and Inner Door/Gasket Removal,
Inspection, Replacement and Reinstallation
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