Johnson Controls XAF Series Installation Manual page 21

Figure 28: XAH horizontal left application with
modular air handler
Figure 29: XAH horizontal right drain pan extension
Installation Manual: XAF, XAH, and XAU Series - Full Cased and Uncased Coils for Cooling and Heat Pumps
XAH coils that have a three-row or four-row heat
exchanger configuration have the risk of condensate
blowing off of the heat exchanger fins into the outlet
ductwork in horizontal right applications that require
high airflow. The attachment of the provided extension
pan is required to mitigate the risk of condensate blow
off.
Complete the following steps to install the horizontal right
drain pan extension:
1. Install the L-shaped bracket to hold the horizontal
right drain pan extension into place with two screws
as shown in Figure 29.
2. Install the horizontal right drain pan extension
with four screws as shown in Figure 29. Install the
horizontal right drain pan extension onto the coil
cabinet from the outside of the cabinet before duct
work attachment. Alternatively, it can be installed
through the coil cabinet opening itself if the coil
door is removed and coil sub-assembly is slid out of
the cabinet.
3. Slide the XAH coil back into the casing if the coil was
removed for horizontal right drain pan extension
installation. See Figure 30 for the resulting assembly.
Johnson Controls Ducted Systems
NOTICE
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