Carrier 42C Series Product Data page 23

Mega Stack units (42SM) are designed to be installed either in a small mechanical closet or furred in with
drywall adhered directly to the cabinet. One of the unique traits of the 42SM unit is its optional discharge
plenum. The discharge plenum is a factory-installed option that adds 22-in. to the unit height and pro-
vides multiple air duct or supply-air grille connections.
The designer is afforded the luxury of specifying a single unit, which can duct to multiple spaces, direct
discharge to a single space, or provide a combination of the two. If necessary, the plenum can be added
or removed in the field to accommodate design changes.
Below are a few of the many arrangement possibilities of the 42SM fan coil system.
Equipment
installed
in closet with
ducted and
direct discharge
a42-4262
NOTE: Risers ship separately. Units should be field connected using factory furnished flex hoses.
42SM UNIT CONFIGURATION OPTIONS
42SM
LEGEND
Exterior Wall
Field Sheetrock
Separation or Utility Chase
Mega Stack Unit
Furred in with
ducted discharge
42SM
Partition (or Separation) Wall
Supply Air
Return Air
Field Installed Risers
a42-4262
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