Empire Comfort Systems DVCTL60CFP95N Instructions D'installation page 33

Damper Adjustment
This unit has an adjustable damper for use with vertically terminated
units only. The damper is shipped in a fully open position and may
be adjusted per installation. To adjust, loosen the Phillip screw
and rotate handle towards the left to close. We recommend a 1/3
closed on installations above 30 ft. See Figures 61 to 63.
Adjust damper for vertically terminated units only. Do not
adjust for horizontally terminated units.
DAMPER SHIPS
FULLY OPEN
43902-0-1021
DAMPER ADJUSTMENT
WARNING
DAMPER SETTING RECOMMENDED
VERTICAL SETTING ABOVE 30 FEET
DAMPER
Figure 61
Figure 62
DAMPER SETTING
RECOMMENDED
VERTICAL SETTING
ABOVE 30 FEET
Figure 63
Page 33