Bradford White EF120T4003NA3 Service Manual page 28

Combustion System Testing and Replacement
WARNING
Heater components may be HOT when performing
the following steps in this procedure. Take necessary
precaution to prevent personal injury.
Combustion System Removal Procedure
1. Position main power switch to OFF.
2. Disconnect (unplug) water heater from 120 volt power source.
3. Turn OFF gas supply to water heater.
4. Unlatch and remove surround cover from top of heater.
5. From the gas valve, disconnect the gas connection, intake venting, silicone tubing, and wire harness.
6. Disconnect flame sensor and blower wire harnesses. Disconnect high voltage cable from spark rod connection.
7. Remove the 5 bolts (1/2" socket) holding the burner mounting insert in place.
8. Carefully remove combustion assembly with gasket from water heater.
9. See next page for combustion system installation procedure.
28
Service Procedure II:
120T400
120 volt potential exposure. Use caution making
voltage checks to avoid personal injury.
28
WARNING
120T500