Installation
38 RT-SVX36K-EN
disturbances at the return fan inlet that could
contribute to unusual return fan noise.
• If a full perimeter curb is used, make sure the IRU
option was added to the unit to ensure stability in the
condenser section
Unit Rigging & Placement
Note: Use spreader bars as shown in the diagram. Refer
to the Installation manual or nameplate for the unit
weight. Refer to the Installation Instructions
located inside the side control panel for further
rigging information.
1. A Center-of-Gravity illustration and the dimensional
data is shown in Figure 18, p. 34 and Table 12, p. 34.
2. Attach adequate strength lifting slings to all four lifting
lugs on 20 through 75Ton units.The minimum
distance between the lifting hook and the top of the
unit should be 7 feet for 20 through 75Ton units.
Figure 21, p. 39 illustrates the installation of spreader
bars to protect the unit and to facilitate a uniform lift.
Table 13, p. 35 lists the typical unit operating weights.
3. Test-lift the unit to ensure it is properly rigged and
balanced, make any necessary rigging adjustments.
4. Lift the unit and position it over the curb and pedestal.
(These units have a continuous base rail around the air
handler section which matches the curb.
5. Align the base rail of the unit’s air handler section with
the curb rail while lowering the unit onto the curb.
Make sure that the gasket on the curb is not damaged
while positioning the unit. (The pedestal simply
supports the unit’s condenser section)
A cross section of the juncture between the unit and the
roof curb is shown in Figure 22, p. 39.
Figure 20. Solid flow baffle wall installation for non-
Trane roof curbs
WARNING
Heavy Objects!
Ensure that all the lifting equipment used is properly
rated for the weight of the unit being lifted. Each of the
cables (chains or slings), hooks, and shackles used to
lift the unit must be capable of supporting the entire
weight of the unit. Lifting cables (chains or slings) may
not be of the same length. Adjust as necessary for even
unit lift. Other lifting arrangements could cause
equipment or property damage. Failure to follow
instructions above or properly lift unit could result in
unit dropping and possibly crushing operator/
technician which could result in death or serious injury.
Return Fan
Roof Curb
Return Airflow
Flow Baffle
Return Airflow
Duct
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