ACCESSORIES
EVAPORATOR RETURN AIR PLENUM, DEP
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 grill. 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.
DEP-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 is installed, it is recommended to set the evaporator blower
speed to high, to avoid evaporator freeze-up.
Plenum Kit
Duct/Flange
OWC12
OWC18
OWC24
OWC36
OWC60
FILTERS
DEP-10
10 inch
ü
(1) 10”X20”X1”
DEP-12
12 inch
ü ü
(1) 15”X25”X1”
DEP-16
16 inch
ü
ü
(1) 12”X30”X1”
(1)15”X30”X1”
Maximum
Equivalent Feet
25
50
50
50
100
Est. External
Static
Pressure
(.20)
(.25)
(.25)
(.25)
(.50)
FILTER(S)
DEP—EVAPORATOR
RETURN AIR PLENUM
10
