Installation and operating instruction
Oil burner WL5-PB-H purflam®
10 Troubleshooting
83242002 1/2019-03 La
57-76
10.2 Operating problems
The following faults must only be rectified by qualified personnel:
Observation
Cause
Rectification
Oil pump makes severe mech-
anical noise
Oil pump sucks air
Ensure oil supply is tight
Suction resistance in oil line too high
Clean filter
Check oil supply
Oil nozzle atomisation uneven
Nozzle blocked/soiled
Replace nozzle [ch. 9.4]
Nozzle worn
Flame tube/air nozzle has heavy
soot deposit
Oil nozzle defective
Replace nozzle [ch. 9.4]
Mixing head set incorrectly
Set mixing head [ch. 9.10]
Incorrect combustion air quantity
Adjust burner
Boiler room ventilated insufficient
Ensure sufficient boiler room ventila-
tion
Wrong oil nozzle
Check nozzle type
Recirculation aperture too small
Increase recirculation aperture
[ch. 9.11]
Combustion pulsating or burner
booming
Mixing head set incorrectly
Set mixing head [ch. 9.10]
Incorrect combustion air quantity
Adjust burner
Wrong oil nozzle
Check nozzle type
CO content too high
Nozzle distance too big
Check nozzle distance, adjust if
necessary [ch. 9.10]
Fan speed too low
Increase fan speed
Stability problems
Nozzle distance incorrect
Check nozzle distance, adjust if
necessary [ch. 9.10]
Recirculation aperture too big
Reduce recirculation aperture
[ch. 9.11].
Fan speed too high
Reduce fan speed
Burner pulsating at START
Combustion chamber resistance too
high (e. g. condensing boiler)
Check installation
If necessary optimise start behaviour
[ch. 9.17]
Flue gas noise emission too
high
Unsuitable or no flue gas sound ab-
sorber installed
Check or fit flue gas sound absorber