Service Manual

35
Service Procedure III
Burner Tube Inspection and Replacement
Burner Tube 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 the water heater.
4. Unlatch and remove the surround cover from the
top of the water heater.
5. From the gas valve, disconnect the gas connection, PVC venting, silicone tubing, and wire harness.
6. Disconnect the wire harness from the blower assembly.
7. Remove the two screws holding each the igniter and flame sensor in place (long reach
magnetic Phillips screwdriver). Carefully remove igniter and flame sensor from combustion
assembly.
8. Remove the 4 nuts (7/16" wrench) holding the burner transition in place. Lift the blower/gas valve transition
assembly from burner mounting insert, remove gasket and set aside.
9. Remove burner tube from burner mounting insert. See next page for burner tube inspection procedure.
WARNING
120 volt potential exposure. Isolate the appliance and
reconfirm power is disconnected using a multi-meter.
WARNING
Heater components may be HOT when performing
the following steps in this procedure. Take necessary
precaution to prevent personal injury.
Igniter
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