Prepare The Burner; General; Low Fire Rate Baffle (If Specified); Mount Burner On Appliance - Beckett NX50LG Manual

Inspect/Prepare |nstallation Site
Prepare the Burner
• General
In most cases, the burner is ready to mount to the
appliance. There can be situations where the burn-
er needs to be reconfigured to perform properly in
the appliance. Review the appliance manufactur-
er's specifications prior to installing to determine if
any modification is required to properly configure
the burner.
Instruction on how to perform the following burner
preparation tasks can be found in the Professional
Maintenance section.
Remove / install burner nozzle
Check head/air adjusting plate
• Low Firing Rate Baffle (If specified)
The NX Low Firing Rate Baffle (LFRB), refer to Fig-
ure 2, reduces the burner airflow and pressure. Re-
fer to the appliance manufacturer's instructions or
the Beckett OEM Specification Guide part number
6711. To avoid poor burner performance, do not
omit the baffle when specified or install the baffle
when not specified.
• Mount Burner on Appliance
Verify that the air tube installed on the burner pro-
vides the correct insertion depth. Refer to Figure
3.
The end of the air tube should normally be 1/4"
back from the inside wall of the combustion cham-
ber. Never allow the leading edge of the retention
ring to extend into the chamber, unless otherwise
specified by the appliance manufacturer.
Bolt the burner to the appliance using the factory-
welded flange.
Figure 3. - Mounting Burner in Appliance
1 ,,'4"
K9668
Note:
The Low Firing Rate Baffle may have been factory
installed. If field installation is required, insert the
Low Fire Rate Baffle into the housing, aligning the
mounting screw hole with the notched hole in the
burner housing. Make note that the curved end
of the baffle should be below the motor bolt boss.
Tighten the thread cutting screw to 12-24 in-lbs.
Figure 2. - Mounting Low Fire Rate Baffle in
burner housing.
• Connect Fuel Lines
Do Not Install By-pass Plug
with 1=Pipe System
Failure to comply could cause immediate pump
seal failure, pressurized oil leakage and the po=
tential for a fire and injury hazard.
• The burner is shipped without the by-pass plug in-
stalled.
• Install the by-pass plug in two-pipe oil supply systems
ONLY.
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"&CAUTION
Oil Supply Pressure
ml
Control Required
Damage to the filter or pump seals could cause
oil leakage and a fire hazard.
• The oil supply inlet pressure to the burner cannot
exceed 3 psig.
• Insure that a pressure limiting device is installed
in accordance with the latest edition of NFPA 31.
• Do not install valves in return line.
• Gravity Feed Systems: Always install an anit-
siphon valve in the oil supply line or a solenoid
valve (RWB Part # 2182602U)in the pump/noz-
zle discharge tubing to provide backup oil flow
cut-off protection.
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