Solo Innova Instructions 1-800-782-9927 Version 01-18
Tarm Biomass · 4 Britton Lane · Lyme, NH 03768
4.11.4 Cleaning the Induced Draft Fan
The induced draft fan
(Fig. 4.9)
must be inspected regularly (about four times a year) and cleaned as
necessary. Dust and ash buildup on the fan blades can significantly reduce fan performance.
For inspection and cleaning, remove the induced draft fan on the back side of the boiler. Check for
build-up and damage and at least once a year clean the draft fan wheel inside and out using a stiff
brush. Remove ash deposits from the induced draft fan housing using a putty knife, and vacuum loos-
ened material from the housing and draft fan.
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.
Boiler Operation, Maintenance, and Service > Cleaning and Maintenance
Page 44
NOTE
Clean heat exchanger tubes and smoke box mean better heat transfer from the flue gas to the
water and thus better operating economy.
NOTE
Elevated flue gas temperatures above 500 ºF (260 ºC) may indicate the need to brush the heat
exchange tubes.
Fig. 4.9
Fan Blades
Removed Fan
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 ruined.