Trane CSAA Installation Instructions

6 CLCH-SVN05C-EN
Pre-Installation
As-built submittals show the intended layout of the
various air handler sections to meet job site requirements.
Installation information (unit dimensions, clearances,
weights, curb location and roof opening dimensions and
locations) may vary with special equipment and
applications. For exact information, always refer to the
specific unit submittals, which can be obtained from your
local Trane sales office.
Roof curbs are shipped “knocked down” for assembly at
the job site.
Site Preparation
Ensure the installation site can support the total weight of
the air-handling unit, including accessories and the roof
curb. For approximate air handler section weights, refer to
Performance Climate Changer™ Air Handler IOM, CLCH-
SVX07*-EN. Units with special options or arrangements
will differ in dimensions, clearances, weights and roof
opening dimensions and locations. Always refer to unit
submittals before marking off the dimensions of the unit
roof curb, pipe ca binet curb (if pipe cabinet is ordered),
and roof openings. For roof curbs supplied by Trane,
approximate roof curb weights are in Table 1.
Note: To calculate the total curb weight, find the unit
length, multiply by the factor supplied in Table 1 for
the applicable roof curb height, and add the curb
end weight for the applicable roof curb height.
Roof Curb Installation Checklist
It is recommended that the curb be installed directly on the
support members and fastened to the supports using tack
welds or other equivalent methods. Properly supported
decking should be installed inside the air handler section
of the curb when this method is used.
 Verify that the roof structure can adequately support
the combined weight of the unit and curb assembly.
 Ensure that the selected installation location provides
sufficient service and operational clearances.
 Remove any twist within the curb due to roof supports
and square the curb.
 Level the curb.
 Secure the curb to the roof support members.
 Install 2-inch thick boards or rigid insulation around the
curb.
 Install cant strips around the curb.
 Bring field supplied roofing felt up to the top of the
curb nailing strips. Nail felt into place.
 Install field supplied flashing under the lip of the curb
flanges and over the felt.
 Apply sealant to the four corners.
 Caulk all joints between the curb and the roof. Attach
the gasket material to the curb’s top flanges (entire
perimeter) and to the supply and return air duct open
panel flanges.

Trane CSAA Specifications

General

Brand	Trane
Model	CSAA
Category	Air Handlers
Language	English