28
Yoder YS 640
Variable Displacement Damper
The YS640 is tted with a variable displacement damper for managing heat distribution
in the pit from the rebox to the chimney end. See FIG 24.
DAMPER
HANDLE
CHIMNEY
STACK
DAMPER AT MID-LOCATION
DAMPER AT MID-LOCATION
FIREBOX
When the YS640 is set up with the heat diuser in place the Variable Displacement
Damper allows the pit master additional temperature control at the grate level. With
the damper pushed all the way, in the left half of the grill will run hotter (FIG 25). When
positioned all the way open, the right side of the grill will run hotter. With the damper
pushed in about 5 inches, the grate surface will cook evenly, creating an ideal environ-
ment for slow cooking.
With the direct grill kit in place, it is recommended that the damper is completely open
to develop heat across the entire cooking surface.
• By pushing the damper all the way in (toward the rebox) heat is
concentrated for grilling on the left side of the Yoder. See FIG 25.
Setup #3: Direct grilling with searing capability: Remove the heat diuser plate, set
the variable displacement damper in the full open position (FIG 27) and install the Grill
Grates on the left side of the cooker. (With the heat diuser/drip plate removed, some
users prefer to line the bottom of the cooker with foil to facilitate cleanup). When setup
direct (heat diuser out, one set of Grill Grates and one standard cooking grate in-
stalled), the Yoder creates a true direct/indirect cooking environment.
With a second set of Grill Grates installed on the right side of the Yoder, temperatures
are fairly even across the entire cooking surface; this is true with the diuser in or out.
FIG 24
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