Service Procedure Iii: Burner Tube Inspection And Replacement - Bradford White UCG100H3993N Service Manual

Burner Tube Inspection and Replacement
Heater components may be HOT when performing the following steps in this procedure. Take necessary precaution
Burner Tube Removal Procedure
Step 1. Position main power switch to "OFF".
Step 2. Disconnect (unplug) water heater from 120 volt
power source.
Step 3. Turn off gas supply to water heater.
Step 4. Un-latch & remove surround cover from top of
heater.
Step 5. From the gas valve, disconnect the gas
connection, PVC intake venting, wire harness
and silicone tubing.
Step 6. Disconnect wire harness from blower assembly.
Step 7. Remove the two screws holding each the spark
rod and flame sensor in place (long reach
magnetic Phillips screw driver). Carefully remove
spark rod and flame sensor from combustion
assembly.
Step 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.
Step 9. Remove burner tube from burner mounting insert.
See next page for burner tube inspection procedure.
Service Procedure III:
WARNING
to prevent personal injury.
120 volt potential exposure. Isolate the
appliance and reconfirm power is disconnected
using a multi-meter.
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WARNING
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