Bell Mouth Discharge Connections; Traq Damper Connections; Traq Damper Duct Connections - Trane CSAA Installation, Operation And Maintenance Manual

Component Installation

Bell Mouth Discharge Connections

Round duct connections to be fastened to plenum fan and
discharge plenum sections with bell mouth discharge
openings should be sized to attach to the casing or directly
to the bell mouth fitting. Attachment to the casing requires
the round duct diameter to be sized two inches larger than
the nominal bell mouth outlet. An angle ring with a flat
flange should be affixed to the round duct to secure the
duct to the casing (see Figure
mouth fitting requires the duct and fitting to be insulated
by the installing contractor up to the bell mouth radius to
prevent condensation (see
fitting extends through the casing by one inch.
Figure 125. Securing round duct to casing over bell
mouth outlet
1 inch
Bell mouth
outlet -
nominal
diameter
1 inch
Round duct
Angle ring
Figure 127. Traq damper duct connections
W
H
Traq damper
mixing box
98
125). Attachment to the bell
Figure 126). The bell mouth
Airflow
D
D = 1 hydraulic duct diameter = 2 x W x H
Figure 126. Securing round duct to bell mouth outlet
1 inch
Bell mouth
outlet -
nominal
diameter
Round
duct
1 inch
External
insulation

Traq Damper Connections

Size the duct connections to attach to the specified portion
on the face of the mixing box that the duct connection
completely covers all of the Traq damper.
For a mitered corner, provide one hydraulic duct diameter
between the entering face of the Traq dampers and the
duct turn. For a radius elbow, or sweep, place the elbow
directly against the face of the Traq dampers (see
Figure 127).
Traq damper
mixing box
Mitered
corner
W + H
Airflow
Radius elbow
(sweep)
CLCH-SVX07K-EN