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ACCESSORIES
CONDENSER RETURN AIR PLENUM
Condenser return air plenums are available for installations where it is required to duct air
to the inlet of the condenser. The plenum easily fits into place on the back of the unit, and
is provided with a flange for connecting 12-inch or 16-inch flexible ducting. A condenser
return air plenum can substantially reduce air noise and allow the unit to operate without
drawing condenser air from the conditioned space. Refer to the table below for
configuration and application information.
NOTE — When installing the condenser return air plenum with a ceiling panel kit,
allow for a minimum separation distance of 2 feet between the unit discharge duct
and the return air duct. It is also recommended to direct the condenser discharge
air away from the condenser return air duct.
Plenum Kit Duct/Flange PAC12 PAC18 PAC24 PAC36 PAC60
2DCP-1 12-Inch
✓
2DCP-2 12-Inch
✓ ✓
DCP-5 16-Inch
✓ ✓
Maximum Approximate
Equivalent Feet
25 50 60 70 80
Estimated External Static
Pressure
(.20) (.25) (.25) (.25) (.50)
2DCP-1, 2DCP-2 and DCP-5
To estimate the “equivalent feet” of condenser duct, add the length of the
condenser intake duct run and the length of the condenser discharge duct run, and
add 6 equivalent feet per bend in the duct. Make sure that you do not exceed the
rated E.S.P. to avoid shut down due to the high pressure cut-out
12
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