Trane 2TEE3F31A1000A Installer's Manual page 7

Figure 11 Mounting Installation Options
properly sized remote filter grille be installed
for horizontal applications. Airflow should not ex-
ceed the face velocity of the filter being used.
The factory installed filter should then be
removed from the unit.
b. Unit is shipped from the factory in the upflow or
horizontal right configuration. Unit conversion is
not required.
c. If the unit is suspended, it must be supported
from the bottom near both ends as well as the
middle to prevent sagging. The service access
must remain unobstructed. If the unit is sup-
ported along the length of the front and back, the
air handler only needs to be suspended at both
ends. See Figure 11.
d. If the unit is not suspended it must be supported
as mentioned above and isolated carefully to pre-
vent sound transmission. Vibration isolators (pur-
chased locally) must be placed under the unit.
e. It is always recommended that an auxiliary drain
pan be installed under a horizontal air handler
18-GE04D2-11
(See Condensate Drain Piping) to prevent pos-
sible damage to ceilings.
f. Isolate the auxiliary drain pan from the unit or
from the structure.
g. Connect the auxiliary drain line to a separate
drain line (no trap is needed in this line) and ter-
minate according to national and local codes.
h. If a return duct is connected to the air handler, it
must be the same dimensions as the return
Rail
opening shown in the outline drawing on page
13.
i. Openings where field wiring enters the
cabinet must be completely sealed. Location
of power entry is shown on the outline drawing.
Use 2.5" clear stickers provided to seal all unused
electrical knockouts. See Figure 8.
j. After ductwork connections are made, seal air-
tight and per Local codes.
D.DUCT CONNECTIONS
The supply and return air ducts should be connected to
the unit with flame retardant duct connectors.
Convertible duct flanges are provided on the discharge
opening to provide a "flush fit" for 3/4" or 1-1/2" duct
board applications, see the Outline drawing on page 13
for sizes of the duct connections. After the duct is se-
cured, seal around the supply duct to prevent air leak-
age.
NOTE: If the convertible duct flanges are not used, they
must be removed and discarded for proper airflow.
NOTE: No sheetmetal screws may be used to attach
return ductwork on the side.
NOTE: On units with sheetmetal returns: Return ple-
num should be flanged. Sheetmetal screws must be
1/2" in length or shorter. See Figure 12.
NOTE: Any duct board return connection can be made to
the sides of the unit using tape or mastic.
Figure 12
Installer's Guide
Flange Attachment
7