9
PrimeFire 100, Oil, Operating Instructions, Edition 9.12
Either of these occurences may cause unstable (pulsing)
burner performance.
1. Adjust the combustion oxygen flow to the lowest firing
range of the burner (approximately 2000 SCFH per
MMBtu of fuel input).
2. Adjust the atomizing oxygen pressure to 10 PSI for
light oil, 20 PSI for heavy oil.
3. Open the fuel oil shutoff valve and adjust the flow rate
to the minimum firing range of the burner.
NOTE:
Observe the initial firing to ensure the flame is
centered in the precombustor and atomization is
sufficient.
4. After initial firing, combustion oxygen, atomizing
oxygen and fuel flows may be adjusted as desired.
When satisfactory atomizing oxygen flow is achieved,
the combustion oxygen can be adjusted to obtain the
total oxygen flow requirements for a given input
(approximately 2000 SCFH per MMBtu of fuel input).
NOTE:
The exact ratio will vary depending on the calorific
value of the fuel and the actual percentage of oxygen into
the oxygen delivered.
Combustion oxygen velocity is typically set at the
maximum velocity position. After firing has been
established, combustion oxygen velocity can be adjusted
if necessary.
■
Do not fire burner above or below capacity ranges.
This may cause the burner block to overheat.
Figure 3.4
Adjusting the Flame Shape
After initial firing, use this procedure to adjust the flame
shape.
1. Before attempting any flame shape adjustment with
the burner adjustment screw, loosen the locking bolt.
See Figure 3.2 above.
2. The burner nozzle can be adjusted to 51 mm (2
inches) in relation to the front end flange. To move the
nozzle forward, turn the adjustment screw (item 60)
clockwise. Each increment on the position rod
represents 3 mm (1/8 inch) of nozzle travel.
NOTE:
Typically, the nozzle is set to the Full In (maximum
velocity) position to operate the burner when firing oil. If
the position is set too far back, combustion may start
quickly and cause overheating of the block.
3. Tighten the locking bolt after the desired flame shape
adjustment has been made.
Shutting Down and Removing the Burner
If a burner needs to be shut down temporarily, or for an
extended period, use the following procedure.
If a burner is to be taken offline temporarily and not
removed from the burner block, combustion and
atomizing must be supplied to the burner for cooling
purposes. If both the combustion and atomizing oxygen to
the burner are interrupted for more than 10 minutes, the
burner must be removed from the precombustor.
If a burner is to be taken offline for an extended time, use
the following procedure.
1. If the purge system is provided, purge the oil from the
burner.
2. After the purge is complete, reduce atomizing oxygen,
combustion oxygen, and fuel oil flow control valves to
minimum.
3. Shut off the combustion oxygen, atomizing oxygen,
and fuel oil shutoff valves closest to the burner.
4. Release the burner clamps from the mounting
bracket. Remove the burner from the precombustor
and mounting bracket.
5. Disconnect the combustion oxygen, atomizing
oxygen, and fuel oil lines from the burner inlet.
6. Place a high-temperature fiber wool rolled blanket in
the cavity of the precombustor to prevent hot furnace
gases from escaping through the block.
WARNING
oil
boss
o-rings
(inside)
burner
adjustment screw
o-rings
(inside)
roll pin
locking
bolt
