44 CLCH-SVX07C-EN
Installation - Mechanical
To assemble air handlers utilizing factory-approved and factory-provided dissimilar unit sizes for
horizontal SDU or winterizer applications, join all similar size shipping sections per “Section-to-
Section Assembly”, Step 1 through Step 13, p. 32 through p. 39.
Horizontal SDU/Winterizer Indoor Air Handler Assembly
To assemble dissimilar unit sizes in a horizontal SDU/winterizer configuration:
1. Locate the mounting hardware and gasket material.
Note: Black unit support brackets ship pre-installed on the primary (larger) unit section.
2. Apply gasket in direction of airflow between the black unit support brackets to the roof of the
primary unit. See Figure 32. The gasket needs to be placed such that it will be directly under the
integral base frame of the secondary (smaller) unit to be stacked on top. The secondary unit will
be centered along the width on the primary unit.
3. If there is an opening in the roof of the primary unit, apply gasket perpendicular to airflow on
the roof next to the opening (air entering side only).
Figure 32. Apply gasket in direction of airflow
Unit support
brackets
Gasket
1.0 inches T x
4.0 inches W
Airflow
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