Beckett
Instruction Manual –
Model AF Oil Burner
Prepare burner & site
Prepare burner
Prepare burner
(continued)
Install burner nozzle (
if not already installed
)
(continued)
Burner fuel unit
•
Do not squeeze the electrodes too tightly when handling the nozzle line
assembly. This could change the electrode tip settings or damage the
ceramic electrode insulators.
•
Verify that the burner fuel unit is compatible with the oil supply system.
For more details, refer to “
Connect fuel lines
” on page 7.
Attach air tube (
if not already installed
)
•
Carefully check and realign electrode tips after replacing nozzle,
ensuring the electrode settings comply with Figure 1.
If using a flange and gasket, slide them onto the air tube. Then attach the air
tube to the burner chassis using the four sheet metal screws provided. See
Figure 2 on page 6 for details.
Check/adjust electrodes
Check the electrode tip settings. Adjust if necessary to comply with the
dimensions shown in Figure 1. To adjust, loosen the electrode clamp screw
and slide/rotate electrodes as necessary. Securely tighten the clamp screw
when finished.
Install burner nozzle (
if not already installed
)
Make certain the nozzle is selected for the fuel unit pressure
used. For applications with fuel unit pressure above 100 psig, the nozzle
rated capacity will be less than the appliance firing rate. Use only the
specified spray pattern unless combustion test results indicate the need for a
change. Failure to use the correct nozzle size and type can result in
unacceptable combustion, possibly causing severe personal injury, death or
substantial property damage.
WARNING
Figure 1
– Electrode settings
1. Remove the plastic plug protecting the nozzle adapter threads
2. Place
a
¾”
open-end wrench on the nozzle adapter. Insert the nozzle into
the adapter and finger tighten. Finish tightening with a
⅝
”
open-end
wrench. Use care to avoid bending the electrodes. See
CAUTION
, above
right.
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 or Beckett
OEM Specification Guide,
part number
6711. Verify that the electrode tip settings comply with Figure 1.
If the nozzle is not installed, obtain a nozzle of the manufacturer, capacity and
spray angle specified in appliance manufacturer’s information or Beckett
OEM
Specification Guide
, part number 6711. For conversions or upgrades, when
information is not available for the application:
3. Refer to table below to select the mid-range nozzle spray angle for the
head type being used.
4. Fire the burner and make sure the combustion is acceptable and the
flame is not impinging on chamber surfaces.
5. If a shorter flame is needed, select a wider spray angle. If a longer flame
is needed, select a narrower spray angle.
6. Either hollow or solid spray patterns may be used. If combustion results
are not satisfactory with the selected spray pattern, try the other pattern.
Recommended nozzle spray angles
“F” head
60°, 70°, or 80° nozzle
Use care when removing and installing oil nozzles:
•
Inspect the nozzle adapter before installing nozzle. If it is grooved or
scratched on the sealing surface, replace the nozzle line assembly.
Otherwise, oil could leak at the nozzle-adapter joint, causing serious
combustion problems.
•
Protect the nozzle orifice and strainer when installing. If the orifice gets
dirt in it or is scratched, the nozzle will not function properly.
•
Do not over-torque the nozzle when installing. This will cause deep
grooves in the nozzle adapter, preventing a seal when a new nozzle is
installed.
•
Use a wrench or vise to hold the nozzle adapter.
DO NOT
attempt to
remove or replace nozzle without holding adapter. The nozzle alignment
could be seriously damaged. Use a nozzle wrench that secures the
adapter or use
3
/
4
" and
5
/
8
" open-end wrenches.
Servicing nozzle line assembly
1. Turn off power to burner before proceeding.
Side view
End view
SK9461
2. Disconnect oil connector tube from nozzle line.
3. Loosen the two screws securing igniter retaining clips and rotate both clips
to release igniter baseplate. Then tilt igniter back on its hinge.
4. Remove splined nut.
5. 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.
6. To replace the nozzle assembly, reverse the above steps.
CAUTION
5
