Mendota DXV35 TIMBERFIRE Installation And Operating Instructions Manual page 60

Vent Damper Adjustments
This fireplace is equipped with a vent damper system that can be adjusted. Locate damper adjustment rod above the glass
frame in convection chamber at the center. If this fireplace's vent is terminated horizontally, DO NOT CLOSE the vent damper
completely. Adjust position of damper by judging the flame characteristics after 20 minutes of burn time. If the flames ghost off
burners or if sooting occurs [in LPG units], open the vent damper FULLY and work backwards in increments to determine the
correct damper position for that particular installation.
Look into the convection air
cavity and note the Damper
Position Indicator. Loosen
damper base screw. Turn
counter-clockwise to close
the vent damper, tighten
screw.
If this fireplace's vent is
terminated horizontally, DO
NOT CLOSE the vent damper
completely.
Figure 4-13 Exhaust Damper Adjustment
85-03-01115 DXV35 TIMBERFIRE Page 60