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. 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 can be modified by increasing or decreasing fuel pressure or by changing the maximum oil metering
valve stroke. After changing fuel pressure, low fire should be rechecked.
Check rotation of the combustion blower. The impeller should rotate toward the blower discharge.
Inspect and operate the plant exhaust damper control. The exhaust damper should be capable of maintaining a
consistent negative drum front bulk-head pressure of negative 0.2 inches wc to negative 0.5 inches wc from low to
high firing rates for most applications.
The low oil pressure switch is factory set at 15 psig. This setting may have to be lowered if final pressures are low.
Burner flame spin vanes adjustment can be set at 35 to 60 degrees.
Thirty-five 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.
Install a gas sampling probe in the dryer drum rear (see Application Sheet GJ73).
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).
NOTE: For recommended piping sizes, see General Information Sheet GL88.