Riello DB 4 LSM C13, Installation, Use And Maintenance Instructions

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25
CHAPTER
7
Maintenance
7.3 Problems and remedies
If the burner does not work properly, first you must:
1 check that the electric connections have been correctly performed;
2 make sure that the fuel is flowing;
3 check that all the adjustment parameters (e.g. boiler water temperature or boiler steam pressure) are correctly set.
OIL WORKING
Fault Possible cause Recommended remedy
The burner does not start • No electrical power supply . . . . . . . . . . . . . . . . . . . .Close all switches - Check connec-
tions
• A limiter or safety control device is open. . . . . . . . . .Adjust or replace
• Control box lock-out . . . . . . . . . . . . . . . . . . . . . . . . .Reset control box
• Control box fuses blown . . . . . . . . . . . . . . . . . . . . . .Replace
• Erroneous electrical connections . . . . . . . . . . . . . . .Check connections
• Defective control box . . . . . . . . . . . . . . . . . . . . . . . .Replace
• Air pressure switch in operating position . . . . . . . . .Adjust or replace
• Contact 2 of the servomotor, terminals 11-8 . . . . . . .Adjust cam 2 or replace the
of the control box do not operate (SQM 10) . . . . . . .servomotor (SQM 10)
• Contact 2 of the servomotor, terminals 11-8 . . . . . . .Adjust cam 2 or replace the
of the control box do not operate (SQM 40) . . . . . . .servomotor (SQM 40)
The burner does not start and a
function lock out occurs • Flame simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace control box
The burner starts but stops at
maximum air damper setting • Contacts 1 or 4 of the servomotor, or terminals 9-8 .Adjust cams 1 or 4 or replace the
of the control box do not operate (SQM 10) . . . . . . .servomotor (SQM 10)
• Contacts 4 or 6 of the servomotor, or terminals 9-8 .Adjust cams 4 or 6 or replace the
of the control box do not operate (SQM 40) . . . . . . .servomotor (SQM 40)
The burner ignites but then
blocks Air pressure switch inoperative due to insufficient air pressure:
• Air pressure switch adjusted badly . . . . . . . . . . . . . .Adjust or replace
• Pressure switch pressure point pipe blocked . . . . . .Clean
is blocked
• Head wrong adjusted . . . . . . . . . . . . . . . . . . . . . . . .Adjust
The burner starts and then locks
out • Fault in flame detection circuit . . . . . . . . . . . . . . . . .Replace control box
The burner stays in the pre-
purge stage • Contacts 3 or 5 of the servomotor, or terminals . . . .Adjust cams 3 or 5 or replace
10-8, of the control box do not operate . . . . . . . . . . .the servomotor (SQM 10)
• Contacts 3 or 5 of the servomotor, or terminals . . . .Adjust cams 3 or 5 or replace
10-8, of the control box do not operate . . . . . . . . . . .the servomotor (SQM 40)