Burner Tube Inspection & Replacement - Bock Water heaters HEC Series Service Manual

HEC Series
Heater components may be HOT when performing the following steps in this procedure.
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 venting,
wire harness and silicone tubing.
Step 6. Disconnect wire harness from
blower assembly.
Step 7. Remove the two screws holding
each the hot surface igniter and
flame sensor in place (long reach
magnetic Phillips screw driver).
Carefully remove hot surface igniter
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.
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Take necessary precaution to prevent personal injury.
BLOWER/GAS VALVE/
TRANSITION ASSEMBLY
Service Procedure III
Burner Tube Inspection & Replacement
WARNING
120 volt potential exposure. Isolate the
appliance and reconfirm power is
disconnected using a multi-meter.
FLAME
SENSOR
BURNER
FLANGE
GASKET
BURNER
FLANGE
GASKET
BURNER MOUNTING INSERT
WARNING
GAS VALVE
WIRE HARNESS
GAS CONNECTION
BURNER
TRANSITION
HOT SURFACE
IGNITER
PVC VENT
CONNECTION
BURNER TRANSITION
MOUNTING NUTS
BURNER TUBE