The low oil pressure switch is factory set at 15 psig. This setting may have to be lowered if final oil pressures are
Inspect the complete oil system for leaks. Repair as necessary.
The burner oil metering valve is factory set to travel 90 degrees from position 0 to position 9.
The low fire oil valve is manually set and regulates low fire flow. This valve can easily be changed to regulate low
fire oil flow. Start this valve at position 9. The low fire valve can easily be cleaned:
Mark the valve pointer position.
Turn the valve counterclockwise to the clean position.
Return the valve pointer to its original position.
High fire oil flow can be modified by increasing or decreasing fuel pressure. After changing fuel pressure low fire
flow should be rechecked.
Low and high fire rates in gallons per minute can be checked and recorded with the in-line flow meter provided
with the burner.
Burner flame spin vane adjustment can be set at 35 to 60 degrees. Thirty-five degrees narrows the flame. Sixty
degrees widens the flame. Forty-five degrees is a nominal starting point.
Burner air adjustments: (See Section C - Operation)
Recheck all linkages for tightness.
Connect a flue gas analyzer to the gas sampling probe. (See Application Sheet GJ73)
Flue gas readings should be taken at operating tonnage with burner firing at operating tonnage rates. (See
Application Sheet GJ73)
Fig. 9-Schematic representation of a burner light oil manifold
NOTE: For recommended piping sizes, see General Information Sheet GL88.