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11
ACCESSORIES
Discharge Duct Adapter
Discharge duct adapters are available for applications where ducted evaporator discharge
is required. The adapters can be easily installed on the unit without fasteners, and be
installed for either vertical or horizontal ducting. The standard discharge grille is removed
and the DDA is attached in the grille opening.
DDA-6 for PWC12, converts the evaporator discharge to a 6-inch diameter round duct.
DDA-10 for PWC18 and PWC24, converts the evaporator discharge to a 10-inch diam-
eter round duct.
2DDA-16 for PWC36 and PWC60, converts the evaporator discharge to a 16-inch
diameter round duct.
When used in conjunction with the evaporator return air plenum, DEP, the unit can
provide closed-loop cooling to and from a given space without the influence of any out-
side air.
NOTE—When a DDA is installed, it is recommended to set the evaporator blower
speed to high, to avoid evaporator coil freeze-up.
Adapter
Model
Round
Duct Size
PWC12 PWC18 PWC24 PWC36 PWC60
DDA-6
6-inch
DDA-10
10-inch
2DDA-16
16-inch
Maximum Approx
Equivalent Feet
25 50 50 50 100
Maximum
E.S.P
.15 .25 .25 .25 .50
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