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Carlin 1150FD Flame Failures
Carlin 1150FFD with a Fireye control in a steam boiler. We did the maintenance, changed nozzles, electrodes, etc. Now we get random flame failures hours after running fine. The new nozzles were the factory recommended Semi Solid type. They gave us almost immediate flame failure. We put the old Solid nozzles back in, and now it will run for hours before failing. Seems to always fail overnight. It also won't run steadily unless the primary air is adjusted higher than normal.
I'm thinking a draft problem as the temperature drops at night...?