OCEANAIRE OWC Series Engineering, Installation And Service Manual page 11

ACCESSORIES
EVAPORATOR RETURN AIR PLENUM
Evaporator return air plenums are available for installations where it is required to duct
air to the inlet of the evaporator. The evaporator return air plenums allow the user to
connect round duct (flexible or rigid) to the return air intake to reduce air noise and
increase the number of options for solving difficult cooling problems. The plenum
attaches to the front of the unit, replacing the return air grille. Refer to the table below
for configuration and application information
DEP-10
for OWC12 transitions the return air opening to a 10-inch round duct.
2DEP-12
for OWC18 and OWC24 transitions the return opening to a 12-inch round
duct.
DEP-16
for OWC36 and OWC60 transitions the return opening to a 16-inch round duct.
NOTE
—When a DEP /2-DEP is installed, it is recommended to set the evaporator blow-
er speed to high, to avoid evaporator coil freeze-up
Plenum Kit
Duct/ OWC12 OWC18 OWC24 OWC36 OWC60
Flange
DEP-10
10 inch
2DEP-12
12 inch
DEP-16
16 inch
Maximum
Equivalent
Feet
Est. External
Static
Pressure
✓
✓
25 50
(.20) (.25)
.
FILTER (1) 12" x 30" x 1"
(1) 10" x 30" x 1"
EVAPORATOR
RETURN AIR PLENUM
✓
✓
60 70
(.25) (.25)
9
FILTERS
(1) 10"x20"x1"
(1) 16"x24"x1"
(1) 10"x30"x1"
✓
(1) 12"x30"x1"
80
(.50)