CLCH-SVX07C-EN 75
Component Installation Requirements
Discharge Plenum Connections
Discharge plenum sections are available with or without openings. Sections with rectangular and
round openings have a framed opening that can be used to secure the duct to the frames. If the duct
is lined, it is important the insulation does not obstruct the opening of the section.
For a discharge plenum with field-cut openings, attach the duct to the side panel.
Bellmouth Discharge Connections
Round duct connections to be fastened to plenum fan and discharge plenum sections with
bellmouth discharge openings should be sized to attach to the casing or directly to the bellmouth
fitting. Attachment to the casing requires the round duct diameter to be sized two inches larger than
the nominal bellmouth outlet. An angle ring with a flat flange should be affixed to the round duct
to secure the duct to the casing (see Figure 63). Attachment to the bellmouth fitting requires the
duct and fitting to be insulated by the installing contractor up to the bellmouth radius to prevent
condensation (see Figure 64). The bellmouth fitting extends through the casing by one inch.
Figure 63. Securing round duct to casing over
bellmouth outlet
Figure 64. Securing round duct to bellmouth outlet
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