Chapter 2 Profire V Burner
2-46 750-177
OIL NOZZLE
The nozzle should be checked. Inside the nozzle lies a small screen that keeps out any particle not caught by
the strainer. These particles will interfere with the normal oil flow pattern exiting the nozzle. A distorted flame
can indicate a clogged nozzle. Inspect and clean the nozzle and screen. To clean the screen, swirler, and tip,
unscrew the tip from the nozzle body. Clean the nozzle parts in solvent. Never use wire or sharp metal tools
to clean the nozzle orifice. A metal tool will distort the orifice and ruin the nozzle. Reassemble the nozzle. The
tailpiece must be screwed in with the swirler seating tight against the tip to ensure proper atomization.
Reassemble the nozzle into the nozzle body. If a nozzle is replaced, it must be an identical nozzle (make, size,
and spray angle).
DIFFUSER
The diffuser is factory set and does not require attention under normal operating conditions. If fouled with
carbon, the diffuser should be removed for cleaning:
1. First remove the electrode leads, the gas pilot assembly, air and oil tubes before you attempt to remove the diffuser.
2. Mark the diffuser relative position to the blast tube, with a scribed or pencil line where the three mounting screws
are located, to insure that the diffuser is placed back in the same position.
3. Remove the screws holding the diffuser to the blast tube and slowly pull the diffuser along the blast tube towards
the firing head.
4. Clean all carbon from the diffuser vanes and reinstall in reverse order of disassembly aligning the diffuser with the
scribed marks.
5. When reinstalling, be sure the diffuser is centered with the proper distance.
FIRING RATE CONTROLS
Check all rods and linkages. Make sure all connections are tight. Adjust if necessary. Perform a combustion
test and readjust the burner if necessary.
BURNER MOUNTING INSPECTION
The seal between the burner flange and furnace front plate must not permit combustion gases to escape.
Periodic inspection is important.
OIL SYSTEM
Little maintenance is required on the oil systems other than cleaning the oil filter. This procedure should
bedone at regular intervals. Increased inlet vacuum reading may indicate a clogged filter. Follow the strainer
manufacturer’s maintenance schedule.
Maintenance checks on the flexible coupling between the fuel unit and motor for alignment, tightness and
wear and oil piping connection tightness should also be made at regular intervals. You access the coupling by
removing the airbox cover and loosening the two setscrews on the flex coupling.
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