External Face-And-Bypass Connections; Recommended Bypass Duct Sizes (Inches) - Trane CSAA Installation, Operation And Maintenance Manual

External Face-and-Bypass Connections

The external face-and-bypass damper sections will
require a field-fabricated duct to direct the bypass air into
the appropriate section. Duct sizing recommendations are
listed in Table 34.
Table 34. Recommended bypass duct sizes (inches)
Unit size H
3 16.00
4 18.00
6 18.00
8 18.00
10 18.00
12 22.00
14 22.00
17 22.00
21 28.00
25 28.00
30 28.00
35 45.00
40 45.00
50 45.00
57 47.00
66 48.00
80 56.00
100 56.00
120 56.00
CLCH-SVX07K-EN
W L
20.00 14.00
33.00 16.00
33.00 16.00
39.00 16.00
50.00 16.00
55.00 20.00
61.00 20.00
61.00 20.00
69.00 26.00
69.00 26.00
82.00 26.00
80.00 36.00
93.00 36.00
106.00 36.00
106.00 40.00
121.00 40.00
121.00 48.00
135.00 48.00
162.00 48.00
When attaching a bypass duct to a downstream fan section
or access section, the section will have a factory-provided
opening. (see Figure 128,
When bypassing into an access section, remove a panel. It
is not necessary to cut an opening.
Figure 128. External face-and-bypass with duct
configuration designed to bypass air into a
vertical fan section
Fan
Figure 129. External face-and-bypass with duct
configuration designed to bypass air around
one coil
Fan
Coil
Component Installation
Figure 129, and Figure 130.)
Duct
External
Coil
face-and-bypass
Duct
Access Coil
External
face-and-bypass
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