15
Adjusting Replacement Burner
Adjusting Replacement Burner
Adjusting Replacement Burner
Adjusting Replacement Burner
The excess air adjustments on the Beckett ADC burner are essential to prevent the
potential damage to the burner and the burner combustion chamber. Excess air is
required to insure that the carbon and hydrogen are supplied with enough oxygen to
burn completely.
If there is not enough excess air, the unit will smoke inside the combustion chamber
and eventually lead to unburned fuel residue left in the chamber. The function of the
combustion chamber is to reflect and retain heat to insure that all the atomized oil is
burned.
Even a slight amount of soot can decrease the effectiveness of the chamber. It is es-
timated that 1/8" of soot is equivalent to approximately a 1" thick fiberglass sheet.
With too little excess air, eventually the unburned fuel accumulates into the lining ma-
terial. Eventually it will burn even when the burner is turned off. The heat generated
by this flame will vent out through the burner and can cause internal damage to the
burner. Typically it will damage the plastic coupling which operates the fuel pump
and it can also damage the primary control unit. Other common problems include
blackening and even distorting the optic eye.
The burner is factory set with the air band (B) at the wide open position and the air
shutter (D) adjusted typically between the 8 and 10 setting. Decreasing the excess air
settings can lead to the chamber fires as outlined above.
To adjust excess air flow into the burner: (Diagram 14, Page 16)
1)
Loosen screw (A) and rotate air band (B) to the wide open position, then
tighten screws.
2)
Loosen 2 screws (C) and rotate the air shutter (D) until the pointer arrow (E)
points to the number 8 setting.
3)
Start the burner and allow it to run for about 10 minutes.
4)
Loosen the view port retaining bolt (F) and swing cover (G) out of the way as
shown.
5)
While observing the flame through the view port , decrease the air shutter (D)
by rotating it until the flame tip appears slightly smoky, then increase the air
until the flame clears up. The arrow (E) should be in the vicinity of 7 - 10.
Tighten two screws (C).
6)
Close and secure view port.
