Vermont Castings Defiant Operation Manual page 7

-
Secondary combustion
chamber.
Heat-regulating Thermostat. ~llows. unburned gases .t~ com-
Automatically controls air in- bme with oxygen, providIng
take to assure steady, even additional heat.
heat all day, all night long.
Two-Position Damper. The baffle.
Lowered, permits use as Creates a longer
fireplace; raised, helps provide flamepath for
maximum heating efficiency. maximum
heat transfer.
"~.;
Secondary air tube.
Smoke Shelf. Feeds preheated oxygen to
Directs exhaust gases into upper secondary combustion chamber.
chamber, where they release
additional heat before rising up
P
. . flue.
nmary air entry ports.
Disperse preheated air evenly
Th I I
n
& H Th
into combustion zone. ...
e nterna i-artS OW ey
Contribute To Efficient Operation
Secondary Combusti()n
magazine into the chimney connector. (The various re- Secondary air enters the Defiant, Vigilant and Resolute at
quirements of the two functions are explained in the section the lower left-hand end of the stove through the circular
titled "Operation.") It is important to note the relation of the Secondary Air Entrance Port.
handle to the damper. On the Defiant, Vigilant, and Intrepid, Under normal conditions, this remains open all the way at all
when the damper is closed, both it and the handle are ver- times. This air passes down the Secondary Air Tube where the
tical. On the Resolute, the spirally bound wire handle is down oxygen is preheated. The oxygen source is then directed into the
when the damper is closed, and up when it is open. Secondary Combustion Chamber through numerous air ports, en-
Smoke will come out of any opened loading door if the suring a thorough mixing of preheated oxygen with the combusti-
damper is closed. The interlock with the damper handle and ble gases.
the loading door on the Defiant is designed to prevent open- This mixture is then ignited by flames as it leaves the primary
ing the door while the d~mper is closed. The griddle of the combustion chamber.
A Secondary Combustion Chamber allows
the
Vigilant will not open all the way should you forget to lower gases to expand as they are further heated by their own combu&-
tfle damper first. These serve as reminders that you can only tion.
A
large portion of the stove's exterior surface encloses this
load
wood smokelessly
when your stove is in an updraft con- chamber, thus allowing for transfer of the maximum
possible
figuration. amount of heat to the room.
3