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Maintenance (expert) Cleaning and maintenance
Carefully clean the impeller with a soft brush (not a
wire brush) or compressed air to prevent imbalance.
Replace the seal.
Fig. 2-34: Cleaning the impeller, replacing the seal
Lubricate the screws with heat-resistant lubricant and
re-attach the draught fan to the boiler. Tighten the nuts
alternately and evenly. Plug the power supply back into
the draught fan.
2.6.4 Clean temperature sensor
Cleaning the flue gas temperature sensor
Loosen the screws and pull out the flue gas
temperature sensor. Clean it with a soft cloth. Then
replace the temperature sensor. Only hand-tighten the
screws so as not to damage the temperature sensor.
Fig. 2-35: Flue gas temperature sensor
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