
© 2021 Staheli West
159
Fault Conditions
Fault 2002: Burner Smoking
Causes
Troubleshooting
Fixes
• Low fire/High fire tuned
incorrectly.
• Tune the burner.
• Low and high fire nozzles
switched (Low Fire only).
• Remove burner gun assembly
and assure that the bigger 9
nozzle is on the tube that is on
top.
• Swap fuel nozzles (ensure
they are installed in their proper
location).
• Dirty fuel filter.
• Causes fluctuating fuel psi.
• Replace fuel filter.
• Faulty fuel pump.
• Causes fluctuating fuel psi.
• Replace fuel pump.
• Incorrect fuel pressure setting.
• Set fuel pressure to 227 psi during high fire.
• Faulty louver actuator.
• Test in “Manual Mode” to see if
louver actuator moves
• Swap with water purge
actuator.
• Replace louver actuator.
• Dirty flue tubes.
• Inspect flue tubes from rear
exhaust/flue area.
• Clean the tubes :) (See flue
tube cleaning in the Maintenance
Section).
• Faulty/Loose fuel nozzle.
• Remove gun assembly and
inspect nozzles for tightness
(remember to inspect internal
parts of nozzle).
• Can cause white smoke in post
purge.
• Repair/Replace/Tighten fuel
nozzles.
• Leaky gun assembly.
• Remove gun assembly and
inspect for leaks.
• Repair/Replace gun assembly.
• Restricted fuel flow through the
fuel solenoid valves.
• Inspect fuel path, check for
overtightened fittings.
• Remove restrictions.
Summary of Contents for DewPoint 331
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