Form #: SIDOM.4 Page | 6 Revised: 03/19
Installation
Step 1 - Install Unit
Move unit to installation area. Remove unit from shipping package. Do not handle by
controls, flow sensors or damper extension rod.
Optionally, the unit may have factory-installed hanger brackets.
Suspend units from building structure with appropriate field supplied straps, rods, or hanger
wires. Secure the unit and level it in each direction.
Figure 3 below illustrates the use of optional factory installed hanger brackets for
suspending units.
Figure 3 – Factory Installed Hanger Brackets (field supplied rod, nuts and washers)
Step 2 – Make Duct Connections
Install supply ductwork on each of the unit inlet collars. It is recommended that a length of
straight duct equal to 3 times the diameter of the duct is supplied to the inlet of the unit. An
elbow put at the inlet of the unit will create turbulence at the inlet making it difficult for the
flow sensor to accurately measure the airflow. Check that air-supply duct connections are
airtight and follow all accepted medium-pressure duct installation procedures. Refer to
Tables 6.A, 6.B, and 6.C in Appendix A for pressure and flow data.
Install the discharge ducts. Fully open all balancing dampers.
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