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Every 3000 hours / annually
Cleaning and maintenance
Remove the two maintenance covers of the flue gas
recirculation ducts on both sides of the boiler.
Fig. 2-31: Maintenance cover for flue gas recirculation
Using an ash vacuum cleaner, remove ash from the
ducts. Likewise, clean the round openings of the flue
gas recirculation on both sides.
Fig. 2-32: Clean ducts
Fig. 2-33: Clean ducts
Check the seals of both maintenance covers to ensure
they are in good condition, replace if necessary.
CAUTION!
Never operate the boiler with damaged seals.
Reinstall the maintenance cover for the flue gas recir-
culation and also the panels.
Clean the heat exchanger
First, loosen the two knurled nuts of the heat
exchanger covers by turning them anti-clockwise.
Fig. 2-34: Knurled nut
Next, turn each of the ball knobs by 180°.
Fig. 2-35: Ball knob