Bradford White U-TW4-75S-76R-3N - Manual (Page 16)

Step 11. Firmly place right side inner door flange against the burner door flange and secure with two ¼” drive
screws from step 4d (see photo 7). DO NOT OVER TIGHTEN SCREWS.
Step 12. Align right side inner door to combustion chamber and verify the fastener holes of the combustion
chamber are aligned with the right side inner door slotted opening (see photo 7). Verify seal integrity around
combustion opening. Secure right side inner door using 1/4” hex drive screws from step 4c.
DO NOT OVER TIGHTEN SCREWS. Verify both burner and right sides of the inner door are properly
positioned and sealed against the combustion chamber.
Step 13. Reconnect spark igniter/flame sensor wire and simulated resistive device to the gas control (See photos 1&2
on page 14).
Step 14. Reconnect the pilot tube to the gas control and tighten.
Step 15. Replace outer jacket burner access door.
Step 16. To resume operation follow the instructions located on the lighting instruction label or the lighting instructions
located in the installation and operation manual.
Position Thermopile Wire,
Pilot Tube and Igniter Wire
Step 10. Position thermopile wires, pilot tube and igniter wire
against burner door flange gasket
(see photo 6).
Secure flange with ¼"
drive screws.
Verify threaded hole
alignment with slotted
openings in inner door.
7
6
U TTW SERVICE PROCEDURE I
Burner and Inner Door/Gasket Removal,
Inspection, Replacement and Reinstallation
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