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Profire EV/LNEV Burner
H. Burner Maintenance
Impeller and Inlet Cone
Proper clearance between the impeller and the inlet housing
set at 3/8" nominal. Adjust the inlet cone so it is centered in
the inlet of the impeller and tighten the bolts. There should be
no contact between the inlet cone and the impeller. Inserting
750-364
a bar through the impeller blade and using it as a lever will
only damage the blade and also void the impeller warranty.
Firing Head Inspection
Remove the bolts that secure the burner housing to the fan
housing and swing the housing open for access to the firing
head. Inspect the flame scanner lens to be sure it is clean
Inspect the lead wire to the ignition electrode. It must be
firmly attached and the insulation should be clean and free of
cracks. The oil nozzle should be inspected periodically
Chapter 2
2-7
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