Defiant Encore Design Changes
The Defiant Encore damper was modified in October 1986 to provide a cast wedge
shaped stop to prevent the damper from striking or resting on the catalytic package when
operating the stove in the updraft mode. The torsion bar slide area in the centre of the
damper was widened to preclude torsion bar binding when opening and closing the
damper.
The ash drop assembly was modified in October 1986 to accept a split (two piece) half
hinge which allows 3 dimensional adjustment of the ash door resulting in an improved
ash door to ash drop and stove bottom seal.
In November 1986 the ash door handle assembly was lengthened to accommodate the
plinth configuration and to increase the safety factor by avoiding the possibility of
scraping or burning the knuckles when opening or closing the ash door.
The secondary air valve (flap) was modified in December of 1986 to accept a pop rivet
which acts as a valve stop or limiter to prevent the valve from hanging below its intended
position and eliminate vibration of the air valve during catalytic burn periods.
The stove back and catalyst access plate was redesigned in December 1986 to allow ease
of servicing the catalyst block, reducing the risk of damaging the catalyst block and/or
the refractory access panel when performing maintenance.
A new ash door and ash pan bracket was introduced in January 1987 to provide better
operational tolerance and clearances and to accept heavier gasketing. A single ash door
hinge in and a new ash pan and cover were also provided at this time.
In February of 1987, the damper torsion bar was changed from cold rolled steel to
stainless steel to improve reliability of damper operation over wide ranges of temperature
change.
The thickness of the 3 damper tabs was doubled in March of 1987 to prevent the
possibility of bending during assembly and/or operation.
