Engineering, Installation and Service Manual

ACCESSORIES

CONDENSER RETURN AIR PLENUM, 2DCP

Condenser return air plenums are available for installations where it is required to duct air

to the inlet of the condenser. The plenum easily attaches with one screw to the back of

the unit, and is provided with flange(s) for connecting 12-inch flexible ducting. A con-

denser return air plenums can substantially reduce air noise and allows the unit to oper-

ate 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 the ceiling panel

kits, allow for a minimum separation distance of 2 feet between the unit discharge

duct and the return air duct(s). It is also recommended to direct the condenser

discharge air away from the condenser return air ducts.

Plenum Kit Duct/Flange PAC12 PAC18 PAC24 PAC36 PAC60

2DCP-1 12-inch

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2DCP-2 12-inch

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2DCP-4 (2) 12-Inch

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Maximum Approximate

Equivalent Feet

25 50 50 50 100

Estimated External Static

Pressure

(.20) (.25) (.25) (.25) (.50)

2DCP-1 and 2DCP-2

2DCP-4

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