Bonus Plus Instructions Tarm Biomass 1-800-782-9927 Version 11/14 Page 8
2.2 Boiler Function
2.2.1 General Operation
A generalized discussion of the operation of the Bonus Plus follows. Please refer to the cut-away
views of the boiler in
Fig 2.0 and 2.1
.
The Bonus Plus boiler is an induced draft wood gasification boiler designed to efficiently burn wood
as a component of a hydronic heating system.
The
control panel
(1) has the switch’s, gauge, and controls for the boiler’s operation.
Fuel is loaded through the
load door
(2) into the
loading chamber
(3) and the fire is kindled.
Air is controlled by the
primary air control
(4) and the
secondary air control
(5).
Secondary combustion takes place behind the
ash door
(6) and ashes are also removed through this
door.
Combustion can be monitored through the
sight glass
(7).
Chimney connector is attached to the
flue collar
(13).
The
clean-out cover
(15) is detachable and allows access for cleaning the heat exchanger pipes.
2.1.2 Boiler Control Panel
Product Description and Requirements for Safe Operation > Boiler Control Panel
C
E
B
F
A
D
G
I
H
Ps
ºF
(A) Boiler pressure gauge
(B) Fuse, 6.3 Amp (behind the panel) Blows if overloaded. Contact an electrician if the fuse blows
frequently.
(C) Boiler temperature gauge.
(D) Overheat Thermostat 100 °C (212 °F)) manual reset after boiler drops below 75 °C (165 °F).
(E) Boiler circulator pump switch (not used in North America).
(F) Fan switch
Fig 2.1
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