20
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2500 h / annually
Cleaning and maintenance
CAUTION!
Avoid operation with damaged seals
Never operate the boiler with damaged seals.
Otherwise, leak air is sucked in, disturbing the
combustion process and causing increased wear.
Always replace seals as soon as they are
damaged.
Close heat exchanger cover
Position the heat exchanger cover carefully.
Fig. 2-33: Heat exchanger cover
Turn the ball knobs by 180° to secure the heat
exchanger covers. Then tighten the knurled nuts
evenly and alternately by turning them clockwise.
Fig. 2-34: Knurled nuts and ball knobs
Put the insulating cover back on.
Fig. 2-35: Insulating cover