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Bonus Plus Instructions Tarm Biomass 1-800-782-9927 Version 11/14 Page 34
Boiler Operation, Maintenance, and Service > Cleaning and Maintenance
WARNING
Solid-fuel burning appliances need to be cleaned frequently because soot, creosote and
ash may accumulate. If there is a soot or creosote fire, please do the following:
Establish a routine for the storage of fuel, care of the appliance, and firing
techniques.
Check daily for creosote buildup until experience shows how often cleaning is
necessary.
Be aware that the hotter the fire, the less creosote is deposited, and that
weekly cleanings may be necessary in mild weather, even though monthly
cleanings may be enough in the coldest months.
Elevated flue gas temperatures above 500 ºF (260 ºC) may indicate the need to brush the heat
exchange tubes.
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
Cleaning the heat exchange tubes
The vertical tubes at the back of the boiler are the primary
means of capturing heat from the burning process. Being
the last passage in the boiler that the hot exhaust gasses
pass through, they will accumulate some ash and soot over
time and must be brushed regularly. While the frequency
of cleaning may be more often, the tubes should be
brushed at least monthly. Remove the access cover on top
of the boiler. Pull out and brush the turbulators. Run the
round wire brush up and down the tubes repeatedly. Re-
place the turbulators and access cover taking care that it is
properly seated and centered .
Fig. 4.12
Poor quality fuel may cause tar deposits on the heat exchange tubes. This may make removing
the turbulators difficult and may require more frequent heat exchanger cleaning.
NOTE
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