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should be disconnected from switch in control interface
box. Any controls low voltage end devices located in
second level fan portion should be disconnected via
quick connects at each device.
Unit Placement and Assembly for
Outdoor Air Handlers
NOTICE
Microbial Growth!
Standing water and wet surfaces inside the equipment
can become an amplification site for microbial growth
(mold), which could cause odors and damage to the
equipment and building materials. The floor or
foundation must be level and the condensate drain at
the proper height for proper coil drainage and
condensate flow.
Note: For outdoor air handlers, preparation of the roof curb or
pier mount and roof openings must be completed
before lifting to the roof. See Roof Curbs For
Performance Climate Changer™ Air Handlers Model
UCCA for Outdoor Applications Sizes 3-30 –
Installation Instructions (CLCH-SVN006*-EN).
For proper operation, the unit must be installed level (zero
tolerance) in both horizontal axes. For vertical discharge units,
allow space under the unit for supply air ductwork connections.
Roof Curbs
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 the figure below for details.
Figure 31. Unit set perpendicular to roof curb members
Auxillary support
loaded under curbs
Intake
Airflow
Main roof support member
or auxillary support located
under center of unit or under
section joints
When mounting the unit on its roof curb, make sure that the
gasketing between the roof curb and unit base provides an
airtight seal.
CLCH-SVX009L-EN
Roof mounting curb
inside edge
Discharge
Main roof support member
capable of supporting unit
weight
Pier Mount
If a unit is pier-mounted, at a minimum, locate one pier at each
corner 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 32
Figure 32. Pier locations (typical)
Piers
Note: Piers be must be structurally sound to support the weight of the unit.
Figure 33. Pier mount - side view
4 ft
Assembly
If a unit arrives in sections, then each section must be
individually hoisted, set on the housekeeping pad, roof curb, or
pier mount and then assembled.
Refer to the unit submittals and unit tagging for correct
placement of all sections. If there are any discrepancies
between the submittals and the unit tagging, contact your local
Trane representative before proceeding.
Following the order of the sections on the unit submittals and
tagging, individually place each unassembled section or
subassembly in the appropriate installation location.
Note: Prior to placing fan section in the appropriate
installation location, verify shipping tie-downs have
been removed.
Pipe Cabinets
For outdoor units, the pipe cabinet must be mounted as an
individual section.
1. Remove trim angle and roof hook from the inner side of the
pipe cabinet side wall.
Installation - Mechanical
and
Figure
33).
31
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