Ductwork; Roofcurb - Trane TSC060 Installation Operation & Maintenance

T_C-IOM-2A
Installation

Ductwork

Figure 4-1 illustrates the supply and re-
turn air openings as viewed from the rear
of the unit.
Elbows with turning vanes or splitters are
recommended to minimize air noise due
to turbulence and to reduce static pres-
sure.
When attaching the ductwork to the unit,
provide a water tight flexible connector at
the unit to prevent operating sounds
from transmitting through the ductwork.
All outdoor ductwork between the unit
and the structure should be weather
proofed after installation is completed.
Roof Curb
Downflow
The roof curbs for these units consists of
a "full perimeter" enclosure to support the
unit.
Before installing any roof curb, verify;
1. That it is the correct curb for the unit,
2. That it includes the necessary gaskets
and hardware,
3. That the purposed installation location
provides the required clearance for
proper operation.
4. Insure that the curb is level and square.
The top surface of the curb must be
true to assure an adequate curb-to-unit
seal.
Step-by-step curb assembly and instal-
lation instructions ship with each acces-
sory roof curb kit. Follow the instructions
carefully to assure proper fit-up when the
unit is set into place.
Note:
To assure proper condensate flow during
operation, the unit (and curb) must be
level.
If the unit is elevated, a field constructed
catwalk around the unit is strongly recom-
mended to provide easy access for unit
maintenance and service.
Recommendations for installing the Sup-
ply Air and Return Air ductwork joining
the roof curb are included in the curb in-
struction booklet. Curb ductwork must be
fabricated and installed by the installing
contractor before the unit is set into place.
Note:
For sound consideration, cut only the
holes in the roof deck for the ductwork
penetrations. Do not cut out the entire
roof deck within the curb perimeter.
If a Curb Accessory Kit is not used:
a. The ductwork can be attached
directly to the factory-provided
flanges around the unit's supply
and return air openings. Be sure to
use flexible duct connections at
the unit.
b. For "built-up" curbs supplied by
others, gaskets must be installed
around the curb perimeter flange
and the supply and return air
opening flanges.
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