Critical Coil Projection: Xau Coils; Connecting The Duct System - Johnson Controls XAF Series Installation Manual

Figure 36: Access panel and standard S-Lock
Note:
- See Table 7 for the dimension of each capital letter.
- * On the front duct work access opening, use one S-lock on each side edge.
- ** On the front duct work access opening, use one S-lock on the upper edge.

Critical coil projection: XAU coils

Locate the coil assembly in the duct so that a minimum
distance is maintained between the top of the coil and the
top of the duct. See Table 6.

Connecting the duct system

You can handle air supply and return in several ways. Use
the option best suited to the installation. You can use
upflow, horizontal, or downflow applications.
Adhere to the following:
• The vast majority of problems encountered with
heating and cooling systems can be linked to
incorrectly designed or installed duct systems. To
help ensure a successful installation, correctly design
and install the duct system.
26 Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps
• Use flexible duct connectors to minimize the
transmission of vibration or noise into the
conditioned space.
For XAF and XAH coils, use 1/2-in. screws to connect
duct work to cabinet. If pilot holes are drilled, drill only
through field duct and unit flange.
Johnson Controls Ducted Systems
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