Trane TTA240F Series Installation Operation & Maintenance page 8

Clearances
Provide enough space around the unit
to allow unrestricted access to all
service points. Refer to Figure 1 for
unit dimensions and minimum
required service and free air
clearances. Observe the following
points to insure proper unit operation.
1. Do not install the unit under a low
overhang. Condenser discharge
must not be restricted. See Note
in Figure 1.
Note: Important! Do not obstruct
condenser discharge air.
This can result in warm air
recirculation through the
coil.
2. Do not locate the unit in a
position where runoff water can
fall into the fan discharge
openings.
3. Condenser intake air is supplied
from three sides of the unit.
Adhere to the minimum required
clearances given in Figure 1.
Unit Mounting
Rooftop Mounting
If the unit will be roof mounted,
determine for certain that the
structure is strong enough to support
the unit and any required accessories.
Unit weights are given in Table 2. The
unit should be elevated on a level,
field fabricated four-inch steel or
wood 4" x 4" mounting frame.
Complete the frame and secure it into
position before lifting the unit to the
roof. The mounting frame must
support a minimum of three of the
unit's four sides and should span roof
supports to distribute the load on the
roof.
8
Installation
Figure 2. Roof Mounted Unit
! WARNING
Mounting Integrity!
Ensure that the roof structure
supports are strong enough to
support the weight of the unit and
any accessories. Failure to do so could
result in death or serious injury or
possible equipment or property-only
damage.
The following warning complies with
State of California law, Proposition 65.
! WARNING
Fiberglass Wool!
Product contains fiberglass wool.
Disturbing the insulation in this
product during installation,
maintenance or repair will expose you
to airborne particles of glass wool
fibers and ceramic fibers known to
the state of California to cause cancer
through inhalation. Glass wool fibers
may also cause respiratory, skin or
eye irritation.
Ground Level Mounting
For ground level installation, the unit
base should be adequately supported
and hold the unit near level. The
installation must meet the guidelines
set forth in local codes. The support
should extend two inches beyond the
unit base channels at all points. The
unit and support must be isolated
from any adjacent structure to prevent
possible noise or vibration problems.
Any ground level location must
comply with required clearances
given in Figure 1.
Refrigerant Piping
Structural Preparation
Holes must be made in the structure
to run refrigerant lines. For the
majority of ground-level installations,
the holes can be made in the header
that rests on top of the foundation.
Alternatively, these holes may also be
made in the foundation itself. On roof-
mounted units, refrigerant lines
should enter the building as close to
the unit as possible; preferably within
three to four inches of the refrigerant
connection on the unit, plus a six-inch
(long radius) 90 degree ell entering
the building, Figure 2.
Refrigerant Piping Guidelines
1. Maximum recommended line
lengths (per circuit):
Maximum linear length.......... 150 Ft.
(w/o accumulator)
Maximum suction line lift...... 50 Ft.
Maximum liquid line lift ........ 50 Ft.
2. Maximum allowable pressure
drops (R410A):
Suction Line............................
Liquid Line............................... 50 psi
Note: Route refrigerant piping for
minimum linear length, mini-
mum number of bends and
fittings (no reducers) and
minimum amount of line
exposed to outdoor ambients.
3. Recommended line sizes TTA200
and 240F (two speed):
1 5/8" sealed type L
Suction Line
refrigerant tubing
5/8" sealed type L
Liquid Line
refrigerant tubing
Note: Insulate all refrigerant piping
and connections.
TTA-SVN03A-EN
5 psi