Burner Assembly - andrews HIflo EVO HF 30/300 Installation And Service Manual

6 Servicing
6.2

Burner Assembly

Issue 4 21042918
6.2.1 The burner assembly should be cleaned and
checked annually
1. Move the gas service cock to "OFF". Isolate from the
electrical supply. Unhook and remove the outer door.
2. Disconnect from the bottom of the gas control valve, the pilot
tube, gas control wiring loom.
3. Un-latch & remove surround cover from top of heater.
4. From the gas valve, disconnect the gas connection, intake
assembly, wire harness and silicone tubing.
5. Disconnect wire harness from blower assembly.
6. Remove the two screws holding each the direct spark
igniter and flame sensor in place (long reach magnetic
Phillips screw driver). Carefully remove direct spark igniter
and flame sensor from combustion assembly.
7. Remove the 4 nuts (11mm spanner) holding the burner
transition in place. Lift the blower/gas valve transition
assembly from burner mounting insert, remove gasket and
set aside.
8. Remove burner tube from burner mounting insert.
9. Inspect the burner tube the Outer fiber mesh should be
uniform with no tears or deterioration, Gently squeeze
burner tube, Burner tube should feel firm without any soft
areas around the sides or at the bottom.
10. Visually inspect inside burner tube, Burner tube should be
intact with no areas of deterioration. Ports should be free
of any debris.
11. If the burner tube is affected by any of the above,
replacement is required
DO NOT ATTEMPT TO CLEAN ORIFICES OR MAIN
BURNER SURFACE WITH SHARP METALLIC OBJECTS.
12. Re-assemble in the reverse order
13. Re-light and carry out commissioning check.
See
See section 4 commissioning.
32