Beckett Burner Manual

9
AFG Burner Manual
If the nozzle is already installed, remove the nozzle
line assembly to verify that the nozzle size and
spray pattern are correct for the application (per
appliance manufacturer’s information). Verify that
the electrode tip settings comply with Figure 3.
If the nozzle is not installed, obtain a nozzle from
the manufacturer, having the capacity and spray
angle specifi ed in the appliance manufacturer’s
information. For conversions or upgrades, when
information is not available for the application:
Refer to Table 6 to select the mid-range nozzle
spray angle for the head type being used.
Fire the burner and make sure the combustion
is acceptable and the fl ame is not impinging on
chamber surfaces.
If a shorter fl ame is needed, select a wider spray
angle. If a longer fl ame is needed, select a
narrower spray angle.
Either hollow or solid spray patterns may be
used. If combustion results are not satisfactory
with the selected spray pattern, try the other
pattern.
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4.
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points up. Pull the nozzle line assembly toward you
and remove assembly from burner.
To replace the nozzle assembly, reverse the above
steps.
Mount Burner on Appliance
Mounting options
Bolt the burner to the appliance using the factory-
mounted fl ange or an adjustable fl ange.
Mounting dimensions
When using the Beckett universal adjustable fl ange,
mount the air tube at a 2° downward pitch unless
otherwise specifi ed by the appliance manufacturer.
Verify that the air tube installed on the burner
provides the correct insertion depth. See Figure 7.
The end of the air tube should normally be ¼” back
from the inside wall of the combustion chamber.
Never allow the leading edge of the head assembly
to extend into the chamber, unless otherwise
specifi ed by the heating appliance manufacturer.
Carefully measure the insertion depth when using
an adjustable fl ange. Verify the insertion depth
when using a welded fl ange.
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Table 6. Nozzle Spray Angles
Recommended nozzle spray angles
“F” head 70° or 80° nozzle
“L1” & “L2” head 45°, 60°, or 70° nozzle
“V1” head 45°, 60°, or 70° nozzle
Figure 3. – Electrode Tip Adjustment
Standard Dimensions for F, L1, and V1 Heads.
The Dimensions shown below are for use with L2 heads
and M series air tube combinations ending with an ‘N’
suffi x (example: AFG70MDAQ
N)
Check/adjust electrodes
Check the electrode tip settings. Adjust if necessary
to comply with the dimensions shown in Figure 3. To
adjust, loosen the electrode clamp screw and slide/rotate
electrodes as necessary. Securely tighten the clamp
screw when fi nished.
Servicing nozzle line assembly
Turn off power to burner before proceeding.
Disconnect oil connector tube from nozzle line.
Loosen the two screws securing igniter retaining
clips and rotate both clips to release igniter
baseplate. Then tilt igniter back on its hinge.
Remove splined nut.
“F” head air tube. - Remove nozzle line assembly
from burner, being careful not to damage the
electrodes or insulators while handling. To ease
removal of long assemblies (over 9 inches), rotate
assembly 180° from installed position after pulling
partially out of tube.
“L1”, “L2”, and “V1” head air tubes. - Slide nozzle
line assembly forward (further into air tube) so the
head clears the venturi opening. Then rotate the
nozzle line assembly 90° so the nozzle line end
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Section: Mount Burner on Appliance