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level. Be certain to allow for the depth of the supply/return air plenum when figuring the height of the
unit in the ceiling space.
The 5ā (127 mm) tall vertical supply/return plenum assembly is attached to the bottom of the evaporator
section once the evaporator section is installed. Six (6) screws fasten the plenum to the evaporator
section. The supply/return air grilles should be temporarily removed for access during installation. The
plenum typically mounts flush to the ceiling grid (depending on available space above unit).
Figure 2 Unit with Vertical Plenum Mounting Method and Condenser Installation
Air Cooled Packaged Units
Air cooled package units require an additional condenser fan section to be mounted to the end of
evaporator section at the condenser coil. Place a gasket around the perimeter of the condenser coil
opening. Connect the female motor plug from the condenser blower section to the male plug inside the
evaporator section. Attach the condenser blower section using four (4) self-drilling #10 sheet metal
screws.
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