Bradford White EF120T4003NA3 Service Manual page 31

Burner Tube Inspection and Replacement
Heater components may be HOT when performing the following steps in this procedure. Take necessary
Burner Tube Inspection
1. Inspect burner tube (metal fiber mesh burner) for the following:
a. Outer fiber mesh should be uniform with no tears or deterioration.
b. Gently squeeze burner tube; burner tube should feel firm without any soft areas around the sides or at the
bottom.
c. Visually inspect inside burner tube, burner tube should be intact with no areas of deterioration. Ports should
be free of any debris.
2. If burner tube is affected by any of the above, replacement is required. Refer to burner tube replacement
procedure below.
Burner Tube Replacement Procedure
Note: Provide the model and serial number for the correct replacement burner.
1. Fully inspect burner flange gaskets, igniter and flame sensor gaskets for the following:
a. Tears
b. Missing material
c. Cracks
If gaskets are NOT affected by any of the above, gasket replacement is not required.
2. Install burner tube with gaskets into burner mounting insert. Be sure gasket surfaces are free of debris.
3. Reconnect the blower, gas valve, and transition assembly to burner mounting insert. Secure using nuts from Step
8 on previous page.
4. Carefully reinstall flame sensor with gasket and spark rod with gasket and secure with screws from Step 7 on
previous page. Reconnect wire harnesses to sensor and igniter.
5. Reconnect wire harnesses to blower motor and to gas valve.
6. Reconnect gas supply, intake venting, and silicone tubing to gas valve. Turn ON gas to heater and check for gas
leaks; repair any gas leaks found.
7. Restore 120 volt power supply to water heater and confirm proper operation following the lighting instructions on
the lighting instruction label, or the lighting instructions located in the Installation and Operating Manual.
8. Replace surround cover on top of water heater.
Service Procedure III:
WARNING
precaution to prevent personal injury.
d. Dirt or debris
e. Other imperfections that would inhibit proper seal
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