14
Fig. 34 — Installed Barometric Hood Side View and Isometric View
BAROMETRIC HOOD (HORIZONTAL CONFIGURATION)
For horizontal return and field-installed economizer, install the
economizer as follows:
1. Install the field provided horizontal ductwork onto the unit.
Duct height must be at least 19-1/2 in. high, however the duct
can be no taller than the top of the relief opening in the
bottom panel, or airflow into the outside air hood will be
restricted. (See Fig. 35.)
2. Cut a 16 in. x 36 in. opening in the return duct for the relief
damper. (See Fig. 35).
3. On the field installed economizer (CRECOMZR0**A00), a
birdscreen or hardware cloth is shipped attached to the
bottom panel used for vertical applications.
NOTE: This panel is not used for horizontal return applications.
Remove the screen from the provided panel and install it over the
relief opening cut in return duct.
4. Using the blade brackets, install the relief damper onto the
side of the return duct (see Fig. 36). The two brackets and
relief damper are provided with the economizer.
5. Using the provided hardware, screw the
CRBARHOD001A00 hood sides and top together. (See
Fig. 37.)
Fig. 35 — Relief Damper
Unit
Outside
Air Hood
Min
19 1/2"
Relief
Opening
Return
Duct
16"
1"
18 3/8"
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