Burner Does Not Ignite; Other Faults - IBC DC 23-84 Installation And Operating Instructions Manual

5.4.1 Burner Does Not Ignite

POSSIBLE CAUSES
Gas valve is closed.
Air in gas line.
Gas supply pressure too low.
No ignition.
No spark. Ignition module on gas valve faulty.
Gas/air adjustment not correctly set.
Fan faulty.
Fan dirty.
Gas valve faulty.
5.4.2 Burner Ignites Noisily
POSSIBLE CAUSES
Gas supply pressure too high.
Incorrect ignition gap.
Gas/air adjustment not correctly set.
Weak spark.
5.4.3 Burner Resonating
POSSIBLE CAUSES
Gas supply pressure too low.
Recirculation of combustion gasses.
Gas/air adjustment not correctly set.
5.4.4 The Power is Reduced
POSSIBLE CAUSES
At high rpm the power has fallen by more than
5%.
TROUBLESHOOTING
DC SERIES COMBI BOILERS DC 23-84, DC 29-106, DC 33-124, DC 33-160

5.4 OTHER FAULTS

SOLUTION
Open gas valve.
Remove air form gas line.
Contact the gas supply company.
Replace ignition electrode.
Check the cabling. Check the ignitor cap. Replace the ignition module.
Check adjustment. See gas/air adjustment.
Check the wiring. Check the fuse (3.15A), if necessary, replace the fan.
Clean the fan.
Replace the gas valve. Re-adjust the gas valve, see gas/air adjustment
SOLUTION
Gas pressure regulator may be faulty. Replace the regulator or contact the
gas company.
•
Replace the ignitor.
•
Check the ignitor gap (3/16" / 4.5mm).
Check the setting. See gas/air adjustment.
•
Check the ignition spark gap.
•
Replace the ignitor.
•
Replace the ignition module on the gas valve.
SOLUTION
Gas pressure regulator may be faulty. Replace the regulator or contact the
gas company.
Check combustion air supply and flue gas exhaust piping and terminations,
possible flue gas recirculation in the system.
Check the setting, see gas/air adjustment.
SOLUTION
•
Check appliance and flue system for fouling.
•
Clean the appliance and flue system
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