Service Manual

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Service Procedure II
Combustion System Testing and Replacement (Continued)
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 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 harnesses, flame sensor, and blower. Then disconnect the high voltage cable from
the 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 the water heater.
9. See next page for combustion system installation 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.
Gas valve wire harness
Gas connection
Burner mounting screw
(total of 5)
PVC vent
connection
Burner mounting insert
Burner tube
Burner mounting insert gasket
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