8
CLCH-SVN05C-EN
Installation
Placement
Note:
Isolation rails should not be installed on top of
Trane roof curbs. If isolation rails or isolation curbs
are required, the entire curb system should be
supplied by a specialty curb company.
The roof curb must be supported along its entire
perimeter. The curb may be set parallel or at right angles
to roof support members. If at right angles to the support
members, there must be adequate supporting roof cross
members between the ends (in the direction of airflow). Be
sure the cross members do not interfere with the
connection of supply and return ducts to the unit. See
figure below for details.
•
When mounting the unit on its roof curb, make sure
that the gasketing between the roof curb and unit base
provides an airtight seal.
Note:
When pulling shipping split sections together, the
field-supplied gasket material may bunch up
between bases. Make certain this does not prevent
tight contact between shipping sections.
•
If a unit is pier-mounted, at a minimum, locate one pier
at each corner directly underneath any shipping split
(ensure full support under each side), and then every
four feet at equally spaced intervals around the
perimeter of the unit. Both the unit and the pipe cabinet
should be supported by their base channel around the
entire perimeter (see
Figure 3
and
Figure 4
).
See
Figure 5
for typical cross section for pier- or slab-
mounted base.
Figure 2.
Unit set perpendicular to roof curb members
Discharge
Intake
Airflow
Auxillary support
loaded under curbs
Roof mounting curb
inside edge
Main roof support member
capable of supporting unit
weight
Main roof support member
or auxillary support located
under center of unit or under
section joints
Figure 3.
Pier locations (typical)
Figure 4.
Side view with shipping splits
Note:
Piers beneath shipping splits must be structurally sound to support
the weight of the unit.
Piers
4 ft
