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Bonus Plus Instructions Tarm Biomass 1-800-782-9927 Version 11/14 Page 35
Boiler Operation, Maintenance, and Service > Cleaning and Maintenance
NOTE
Please inspect the draft fan carefully – even a thin coating of ash significantly reduces the air
flow and must be removed.
NOTE
If the fan motor is blocked because of lack of cleaning, the motor can be damaged.
4.10.2 Cleaning the Induction Fan
1. Shut off the power supply to the boiler.
2. Remove the fan housing.
3. Remove the wing-nuts holding the fan in place and
remove the fan.
4. Clean the fan blades, fan housing, and the flue gas
sensor well (pipe). See pictures on following page.
For inspection and cleaning, remove the induced draft fan on the back of the boiler. Check for build-
up and damage 2-3 times per year. Clean the draft fan wheel inside and out using a stiff brush. Re-
move ash deposits from the induced draft fan housing using a putty knife, and vacuum loosened mate-
rial from the housing and draft fan. Check the silicone gasket for condition and replace if necessary.
When the chimney connector is connected vertically directly under the chimney, the fan must always
be removed and cleaned after each cleaning of the chimney.
Fig. 4.13
WARNING
Before accessing the fan shut off the power supply to the boiler.