6. White Smoke Formation on Oil Firing
Oil/Air ratios incorrect due to excess air, or oil
flow is too low. Readjust for proper fuel input,
CO2 and smoke reading.
7. Gray or Black Smoke Formation on Oil Firing
Impingement on cold combustion chamber surfaces due
to undersized chamber, or incorrect oil nozzle spray
angle for application. This could also result in carbon
formation on chamber surfaces. Refer to chamber
sizing, page 12, Fig. 16 and page 13, Table 7 for
additional information. If chamber is the correct size,
change nozzle spray angle in order to shorten or narrow
the flame as required.
Defective or dirty oil nozzle. Replace or clean nozzle.
Incorrect oil/air ratios. Readjust burner to correct CO2
and smoke levels.
Oil pressure too low resulting in poor atomization.
Impingement of raw oil spray on the blast tube choke ring
or oil nozzle air diffuser. Make certain that the diffuser is
seated firmly against the oil nozzle adapter shoulder,
applications indicated on burner data shipped with the
unit. See page 32, Figs. 30, 31 and 32 for additional
information. Position the oil gun assembly fore or aft in
the blast tube to assist in elimination of oil spray on the
blast tube choke ring.
8. Oil High Fire Input Rate Cannot Be Achieved
Oil nozzle size too small. Remove nozzle and check
markings. Replace with correct size nozzle.
Nozzle defective-replace. Nozzle mesh filter dirty-clean
Oil supply pressure to nozzle too low. Readjust.
Oil pump defective. Replace.
On Low/High/Off and Low/High/Low systems N.C. oil
solenoid valve in nozzle return line not closing (or
leaking). Check valve operation and replace if
On two-step pump - N.O. pump mounted oil solenoid
valve defective (not closing). Replace valve or pump.
Oil pump coupling loose (slipping) or defective. Replace.
Linkage mechanically binding. Readjust.
On modulating burner, oil nozzle return line metering
valve set incorrectly. Readjust to attain required nozzle
Oil suction line too small or partially blocked. Make
vacuum test while at high fire. If the vacuum is in excess
of 10 HG, consult line sizing chart on page 10. Make
line size changes, if required.
Blocked or dirty suction line oil filter. Replace or clean.
Manual valves in suction line not fully open. Check and
Suction line check valve or foot valve operating
incorrectly. Check and correct.
Vent system on oil tank blocked creating vacuum on
tank, with high vacuum and lowered oil flow to burner.
Check and correct.
Additional trouble shooting information can be found in the Flame
Safeguard Control bulletin supplied with the burner.
(page 3 - 991)