Bonus Plus Instructions Tarm Biomass 1-800-782-9927 Version 11/14 Page 30
NOTE
If wood is stored in the boiler room, ensure that it is not stored within the clearances to
combustibles or in a way that will impede daily firing or maintenance.
4.4 Adding Wood to an Already Established Fire
It is very important not to add more wood than is needed to raise the thermal storage system to it’s
temperature limit. The maximum heat storage vessel temperature should only be reached when all the
wood in the firebox has burned.
1. If the fan is on go to step 3.
2. Press the start switch
(G)
. The fan should start.
3. Open the filling door slowly 1 inch (2 cm).
4. If thick smoke is seen, wait until it is purged by the fan (about 30 seconds).
5. Slowly open the door.
6. Add wood. Try to stack the wood as evenly as possible.
7. Close the door.
4.5 Daily Firing
The boiler should not be started nor should more wood be added until the thermal storage system is
cool enough to absorb the heat produced by an additional firing. For most applications the tank should
be able to rise 40 °F (20 °C) per load of wood. Depending on the load placed on the heating system, a
single firing of wood during the non-heating season may produce enough energy to last from 3 to 6
days. During the heating months, most owners will find that loading each 12 or 24 hours with a fresh
load of wood is adequate.
If loading within a 12 hour interval, it may be possible to re-kindle the
fire by placing fresh wood in on top of red coals.
Kindling may not be necessary. It is good prac-
tice to clean out the “U” shaped tunnel stone, accessed through the ash door, before each firing. If
black cinders are present, leave them between the U stone and door, they will be burned.
4.6 Shutting Down the Boiler
Switch off the boiler by turning off the fan switch on the control panel. The circulating pump will
shut off when the boiler is cool. Take care not to shut off power to the boiler circulator if there is any
chance that the boiler may heat up again.
4.7 Operation with Thermal Storage System
Tarm Biomass requires that the Bonus Plus be permanently connected to a Thermal Storage System.
The boiler will always be able to discharge its heat resulting in better combustion, less depositing of
soot and tar, and longer boiler life. Operation is simplified as the filling chamber can be completely
filled. The boiler can be fired when you have time and the house can be supplied with heat as required
Boiler Operation, Maintenance, and Service > Adding Wood to an Already Established Fire
It is important to keep the load and ash doors closed during operation. Maintain the door
seals in good condition.
Door gaskets will compress after a few weeks of use. It may be neces-
sary to adjust the loading door and ash door via the adjustment screws found on the hinges.
During the first year, this adjustment may have to be made several times. Thereafter, the adjust-
ment should be checked once or twice per year. The silicone coated rope gaskets used assure a
good seal. A non-coated gasket will harden and will need to be replaced more often.
WARNING
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