Trane TWE031E13FB1 Assembly instructions

ALL phases of this installation must comply with NATIONAL, STATEAND LOCAL CODES
IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service informa-
tion pack upon completion of work.
HAZARDOUS VOLTAGE - DISCONNECT POWER BEFORE SERVICING
WARNING:
Installer’s Guide
A. GENERAL INFORMATION
▲WARNING
!
THIS INFORMATION IS FOR USE BY INDIVIDUALS HAVING
ADEQUATE BACKGROUNDS OF ELECTRICAL AND MECHANI-
CAL EXPERIENCE. ANY ATTEMPT TO REPAIR A CENTRAL
AIR CONDITIONING PRODUCT MAY RESULT IN PER-
SONAL INJURY AND/OR PROPERTY DAMAGE. THE MANU-
FACTURER OR SELLER CANNOT BE RESPONSIBLE FOR
THE INTERPRETATION OF THIS INFORMATION, NOR CAN
IT ASSUME ANY LIABILITY IN CONNECTION WITH ITS USE.
▲CAUTION
!
To prevent shortening its service life, the air handler should
not be used during the finishing phases of construction. The
low return air temperatures can lead to the formation of con-
densate. Condensate in the presence of chlorides and fluo-
rides from paint, varnish, stains, adhesives, cleaning com-
pounds, and cement creates a corrosive condition which may
cause rapid deterioration of the cabinet and internal compo-
nents.
These instructions do not cover all variations in systems or
provide for every possible contingency. Should further in-
formation be desired or particular problems arise which
are not covered sufficiently by this manual, contact your
local distributor or the manufacturer as listed on the air
handler nameplate.
These Air Handlers are shipped from the factory in the
upflow or horizontal right configuration and are fully con-
vertible to downflow or horizontal left. Refer to Section B
beginning on page 3 for additional information.
INSPECTION
Check carefully for any shipping damage. This must be re-
ported to and claims made against the transportation com-
pany immediately. Check to be sure all major components
are in the unit. Any missing parts should be reported to
your supplier at once, and replaced with authorized parts
only.
Convertible Variable Speed –
Air Handlers 2 1/2 - 5 Ton
TWE031E13FB; TWE037E13FB;
TWE040E13FB; TWE049E13FB;
TWE065E13FB
Contents
General Information.............................................. 1
Installation Limitations & Recommendations............................ 1
Unit Installation...................................................... 3
Vertical Upflow ......................................................................... 3
Vertical Downflow .................................................................... 3
Horizontal Left .......................................................................... 4
Horizontal Right ....................................................................... 4
Refrigerant Piping................................................. 5
Condensate Drain Piping ...................................... 6
Electrical - Wiring ................................................... 7
Airflow Adjustment ................................................. 9
Hook Up Diagrams ................................................. 8
Outline Drawings ................................................. 10
Checkout Procedures.......................................... 12
INSTALLATION LIMITATIONS & RECOMMENDATIONS
The general location of the air handler is normally se-
lected by the architect, contractor and/or home owner for
the most effective application and satisfaction.
These air handlers are suitable for installation in a
closet, alcove or utility room with free, non-ducted, air
return, using the area space as a return air plenum.
With ducted supply air, if the minimum clearances to
combustible materials and service access are observed,
the above installations are suitable.
NOTE: Condensation may occur on the
surface of the air handler when installed in
an unconditioned location. When units
are installed in unconditioned spaces,
verify that all electrical and refrigerant line
penetrations on the air handler are sealed
completely.
This area may also be used for other purposes, includ-
ing an electric hot water heater - but in no case shall
18-GE01D1-9

© 2006 American Standard Inc. All Rights Reserved 18-GE01D1-9
Installer’s Guide
AIRHANDLERSUB-BASE
tible flooring an accessory sub-base (TAYBASE101
for TWE031E, TAYBASE100 for TWE037E,
TAYBASE102 for TWE040- 065E) must be used. See
Figure 1.
8. If supplementary heat is to be added, power supply
must be sufficient to carry the load. In addition, mini-
mum air flow settings, unit and duct clearances to
combustible material must be maintained as stated
on the air handler rating nameplate.
▲CAUTION
!
For air handlers not equipped with a factory installed electric
heater, a field installed heater is available from American
Standard Inc. Only heaters built by American Standard Inc.
are approved for use in the air handler. These heaters have
been designed and tested in accordance with UL standards
to provide safe and reliable operation. A list of approved
heaters is provided on the air handler rating nameplate.
Heaters that are not factory approved could cause damage
and are not covered under equipment warranty.
NOTE:
If air handler is used WITHOUT a supplementary electric
heater, a sheetmetal plate is required to cover the open hole
in the airflow system. See Figure 2
. Also seal the cabinet air
tight where the wire enters.
9. If field installed electric heaters are applied, mini-
mum air flow settings, unit and duct clearances to
combustibles must be maintained as stated on the
air handler rating nameplate.
10. If the unit is installed without a return air duct, ap-
plicable local codes may limit this air handler to in-
stallation only in a single story residence & within
conditioned space.
11. If the outdoor unit is to be installed later, or by oth-
ers, then installation of the air handler must be
made to allow access for refrigerant lines, or attach
refrigerant lines to air handler when installing.
a fossil fuel device be installed and/or operated in
the same closet, alcove or utility room.
In addition, these air handlers are suitable for installa-
tion in an attic, garage or crawl space with ducted
supply and return air.
This equipment has been evaluated in accordance with
the Code of Federal Regulations, Chapter XX, Part 3280
or the equivalent. “SUITABLE FOR MOBILE HOME
USE”
For proper installation the following items must be con-
sidered:
1. If adequate power is available and correct according
to nameplate specifications.
2. Insulate all ducts, particularly if unit is located out-
side of the conditioned space.
3. To ensure maximum efficiency and system perfor-
mance, the existing supply and return duct system
static pressures must not exceed the total available
static pressure of the air handler. Reference ACCA
Manual D, Manual S and Manual RS along with the
air handler Product Data and Service Facts for addi-
tional information.
4. It is recommended that the outline drawing be studied
and dimensions properly noted and checked against
selected installation site. By noting in advance which
knockouts are to be used, proper clearance allowances
can be made for installation and possible future ser-
vice.
5. Pursuant to Florida Building Code 13-610.2.A.2.1,
this unit meets the criteria for a factory sealed
air handler.
6. The Refrigerant lines must be sealed and Electri-
cal inlets need to be sealed at both the low and
the high voltage.
7. When the air handler with supplementary heater is
to be installed in the downflow position on combus-
Figure 1
FLOOR OPENING - SIZE
MODEL NO. A B
TAYBASE100 23-3/4 14-13/16
TAYBASE101 21-3/4 14-13/16
TAYBASE102 26-3/4 14-13/16

18-GE01D1-9 3
Installer’s Guide
12. Make sure there are provisions for installing con-
densate drain lines.
13. If side, front or rear return is required, air handler
must be elevated or placed on a plenum
(TAYPLNM100 or 101). Connecting return duct di-
rectly to the side, front or rear of the cabinet is not
approved.
14. Route refrigerant & condensate drain lines away
from air handler so they do not interfere with ac-
cess panels and filters.
15. When external accessories are used, the additional
height and width requirements must be considered in
the overall space needed.
16. These units are not approved for outdoor installa-
tion.
17. These units are approved for draw-through application
only.
B. UNIT INSTALLATION
UPFLOW
a. For maximum efficiency, the horizontal drip tray
should be removed. Tray removal requires that the
coil be removed by sliding the coil out on the coil
channel supports. The tray is detached by remov-
ing the two screws at the drain pan and the two
screws holding the two brackets at the top of the
coil.
b. Remove the factory installed baffle assembly
from the apex of the coil by removing the 5/16"
hex head screws.
Replace this baffle with the factory supplied nar-
row coil baffle using the screws removed previ-
ously (See Figure 3).
c. Position unit on Pedestal or other suitable foun-
dation. If Pedestal is not used, a frame strong
enough to support the total weight must be pro-
vided. Provide a minimum height of 14 inches for
proper unrestricted airflow.
d. 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 to seal all unused electri-
cal knockouts and cage nut openings.
e. If a return air duct is connected to the air han-
dler, it must be the same dimensions as shown in
the outline drawing.
f. Pedestal and unit should be isolated from the
foundation using a suitable isolating material.
DOWNFLOW
a. For maximum efficiency, the horizontal drip
tray should be removed. Tray removal requires
that the coil be removed by sliding the coil out on
From Dwg. 21B140413
4" 6"
17"
1"
3/8"
1/4" HOLES (4)
ACCESSORY BAY99X123
IF AIRHANDLER IS USED
WITHOUT A FACTORY FURNISHED
SUPPLEMENTARY HEATER, A PLATE IS REQUIRED TO COVER
THE OPEN HOLE IN THE AIR FLOW SYSTEM
Remove
and
Discard
Replace
with
Narrow
Baffle
For Maximum Efficiency on
Horizontal Left,
Upflow and Downflow
DOWNFLOW BAFFLE KIT
X
X
7/8" GASKET
SCREWS TO
REMOVE COIL
SCREWS TO
REMOVE COIL
DISCARD
DRIP TRAY
1/2" GASKET
INSIDE SURFACE
OF BAFFLE
7/8" GASKET
SECT. X-X
(TYP. BOTH SIDES)
FILL WITH SEALANT
WATER
BLOW-OFF
BAFFLES
ATTACH WITH
2 SCREWS
EACH SIDE
WATER
DIVERTER
BAFFLES
(5-ton only)
Figure 2
Figure 3
Figure 4

418-GE01D1-9
Installer’s Guide
the coil channel supports. The tray is detached by
removing the two screws at the drain pan and
the two screws holding the two brackets at the
top of the coil.
b. Remove the factory installed baffle assembly
from the apex of the coil by removing the 5/16"
hex head screws.
Replace this baffle with the factory supplied
narrow coil baffle using the screws removed
previously (See Figure 3).
NOTE:
INSTALLATION OF THE DOWNFLOW BAFFLE KIT IN-
CLUDED WITH UNIT IS REQUIRED ON DOWNFLOW APPLI-
CATIONS. SEE FIGURE 4.
c. Detach the coil from the drain pan by removing 4
screws as shown in Figure 4.
d. Remove the front triangular baffle from the coil
and install the 1/2" wide gasket provided per Figure
4. Trim the gasket length to fit the baffle. Reinstall
the baffle to coil, with gasket material compressed
against the coil.
e. Install the water blow-off baffles provided on each
side of the coil with the flange at the top as shown
in Figure 4. The bottom of the baffle is to be as close
to the bottom of the coil as possible.
f. Install the 7/8" wide gasket in each side of the drain
pan as shown in Figure 4 (sect. X-X).
g. The 5 ton model (TWE065E) requires 2 water
diverter baffles to be placed underneath the coil on
the inside edge of the drain pan, Figure 4.
Fill the bend in the baffle which fits the inner edge
of the drain pan with RTV type adhesive/sealant
before installing the baffle.
h. The unit is then placed with the blower side down
and the coil is replaced on the coil channel supports
with the drain connections at the bottom. The unit
is now in downflow position with front access.
i. When supplementary heaters are used, accessory
subbase (TAYBASE101 for TWE031E, TAY-
BASE100 for TWE037E, and TAYBASE102 for
TWE040-065E) must be used. See Figure 1.
j. Openings where field wiring enters the cabi-
net must be completely sealed. Location of
power entry is shown on the outline drawing.
Use 2.5" clear stickers to seal all unused electri-
cal knockouts and cage nut openings.
k. If a return air duct is connected to the air han-
dler, it must be the same dimensions as shown in
the outline drawing.
HORIZONTAL LEFT
a. For maximum efficiency and Customer ease of
filter maintenance, it is recommended that a prop-
erly sized remote filter and 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. To convert the unit to horizontal left, front ac-
cess, slide the coil out on the coil channel sup-
ports and rotate the complete coil 180 degrees.
c. Remove the factory installed baffle assembly
from the apex of the coil by removing the 5/
16" hex head screws. Replace this baffle with the
factory supplied narrow coil baffle using the
screws removed previously (See Figure 3).
d. The coil is then inserted back into the cabinet on
the opposite side coil channel supports. The unit is
now horizontal left with front access.
e. 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 to seal all unused electri-
cal knockouts and cage nut openings.
f. Cage nuts are not provided for horizontal
left suspension. However, if the unit is sus-
pended, 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 not suspended it must be supported as
mentioned above and isolated carefully to prevent
sound transmission. Vibration isolators (purchased
locally) must be placed under the unit.
g. It is always recommended that an auxiliary drain
pan be installed under a horizontal air handler
(See Condensate Piping) to prevent possible dam-
age to ceilings.
h. Isolate the auxiliary drain pan from the unit or
from the structure.
i. Connect the auxiliary drain pan to a separate
drain line (no trap is needed in this line) or route
outside the structure to a conspicuous location in
accordance with national and local codes.
j. If a return air duct is connected to the air han-
dler, it must be the same dimensions as shown in
the outline drawing.
HORIZONTAL RIGHT
a. For maximum efficiency and Customer ease of
filter maintenance, it is recommended that a prop-
erly sized remote filter grille be installed for hori-
zontal applications. Airflow should not exceed the

18-GE01D1-9 5
Installer’s Guide
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. The unit is designed for suspension using 1/4" -
20 threaded rods. Other means of suspension are
allowed as long as the unit is supported from
both ends as well as the middle to prevent sag-
ging and service access is not obstructed.
d. If the unit is not suspended it must be isolated
carefully to prevent sound transmission. Vibra-
tion isolators (purchased locally) must be placed
under the unit.
e. It is always recommended that an auxiliary drain
pan be installed under a horizontal air handler
(See Condensate Drain Piping) to prevent possible
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 local codes.
h. If a return duct is connected to the Air Handler,
it must be the same dimensions as the return
opening shown in the outline drawings.
i. Openings where field wiring enters the cabi-
net must be completely sealed. Location of
power entry is shown on the outline drawing.
Use 2.5" clear stickers to seal all unused electrical
knockouts and cage nut openings.
C. 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 10 for sizes
of the duct connections. After the duct is secured, seal
around the supply duct to prevent air leakage.
NOTE:
If the convertible duct flanges are not used, they must be
removed and discarded for proper airflow.
D. REFRIGERANT PIPING
IMPORTANT:
Refrigerant piping must be routed to maintain service access
to blower compartment and provide easy removal of filter
access panel and filter.
NOTE:
Refrigerant piping must be sealed along with field wiring.
1. Refrigerant connections are made outside the cabi-
net.
NOTE:
TXV bulb
MUST be protected (wrap a wet rag around the
suction line between the TXV bulb and the braze joint) or
removed, while brazing the tubing. Overheating of the
sensing bulb will affect the functional characteristics and
performance of the air handler.
NOTE:
The Referigerant lines must be sealed and Electrical
inlets need to be sealed at both the low and the high
voltage.
2. Installation of refrigerant lines is covered in the in-
stallation instructions packaged with the outdoor unit.
Evacuation, leak testing and brazing procedures are in-
cluded in those instructions. Read those instructions be-
fore starting installation of refrigerant lines.
E. BRAZING TO EVAPORATOR SECTION
NOTE:
A brazing shield is provided in the information pack accom-
panying this unit. This shield fits over the refrigerant fittings
while brazing. Wet the shield before brazing. See Fig. 5.
IMPORTANT:
Do not unseal refrigerant tubing until ready to cut and fit
refrigerant lines.
1. Remove both sealing caps from indoor coil.
2. Field supplied tubing should be cut square, round
and free of burrs at the connecting end. Clean the
tubing to prevent contaminants from entering the
system.
BRAZE SHIELD
5

618-GE01D1-9
Installer’s Guide
NOTE:
Torque specification for TXV equals 1/6 turn past finger
tight.
3. Run refrigerant tubing into the stub sockets of in-
door unit coil.
4. Braze and evacuate according to indoor and outdoor
installation instructions.
PAINTED AREAS OF UNIT MUST BE SHIELDED DUR-
ING BRAZING
▲WARNING
!
TO PREVENT INJURY OR DEATH DUE TO ELECTRICAL
SHOCK OR CONTACT WITH MOVING PARTS, LOCK
UNIT DISCONNECT SWITCH IN OPEN POSITION
BEFORE SERVICING UNIT.
F. CONDENSATE DRAIN PIPING
NOTE:
Make certain that the unit has been installed in a level
position to ensure proper draining.
3/4" NPT Secondary
drain connection
3/4" NPT Primary
drain connection
Figure 6
Field fabricated trap
2" MINIMUM
2" MINIMUM
Manufactured traps
EZT-105
2" MIN.
2" MIN.
CAP OR PLUG
Trap must be within 4'
of air handler condensate
drain connection.
Close as possible
Figure 7
Figure 8
The indoor blower is downstream of the evaporator coil
which creates a negative pressure at the condensate
drain connections during operation. The condensate
drain connections in front of the indoor coil are 3/4"
NPT. The lower connection is the primary drain. See
Figure 6.
Two secondary drain connections are provided for the
different orientations (See Figure 6). The lower of the
two should be connected as a backup to prevent conden-
sate overflow by a blocked primary drain.
For proper drainage of condensate, the following steps
should be followed:
1. The primary drain line must be trapped with a
minimum of 2" water seal as shown in Figures 7 & 8.
Do not use preformed 3/4" PVC running traps.
The use of Field fabricated or manufactured traps
as shown in Figures 7 & 8 is acceptable. The
manufactured trap shown in Figure 7 allows for a
float switch option to be added.
Refer to the manufacturers data and instructions
for details.
2. The trap must be located within 4 feet of the air
handler drain outlet connection.
3. It is recommended that a clean-out tee or cross be
installed in the primary drain line for future mainte-
nance (See Figure 7 & 8).
4. Do not use reducing fittings in the condensate drain
lines.
5. Slope the drain lines downward a minimum of 1/4"
per foot.
6. Insulate the primary drain to prevent sweating.
7. Provide means for drainage to prevent winter
freeze-up of condensate line.
8. Do not connect the drain line to a closed drain system.
9. Use Teflon®tape on the air handler drain line
connections! Do Not Use pipe joint compound or
PVC/CPVC cement!

18-GE01D1-9 7
Installer’s Guide
COOLING OFF - DELAY OPTIONS
SWITCH SETTINGS SELECTION NOMINAL
AIRFLOW
5 - OFF 6 - OFF NONE SAME
5 - ON 6 - OFF 1.5 MINUTES 100% *
5 - OFF 6 - ON 3 MINUTES 50%
5 - ON 6 - ON ENHANCED** 50 - 100%
* - This setting is equivalent to the BAY24X045 relay benefit
** - This ENHANCED MODE selection provides a ramping up
and ramping down of the blower speed to provide improved
comfort, quietness, and potential energy savings. The graph
shows the ramping process.
It is always recommended that an auxiliary drain pan
be installed under a horizontally installed air handler.
Connect the auxiliary drain line to a separate drain line
(no trap is needed in this line) and terminate according
to local codes.
NOTE:
DO NOT use a torch or flame near the plastic drain pan
coupling.
NOTE:
DO NOT tighten the drain pipe excessively. Support the
condensate piping and traps outside the unit to prevent
strain on the drain coupling.
G. ELECTRICAL — POWER WIRING
1. These Air Handlers are shipped from the factory
wired for 230 volts. The units may be wired for 208
volts. Follow instructions on unit wiring diagram lo-
DIP SWITCHES (AS SHIPPED)
COOLING HEATING
AIRFLOW FAN OFF
DELAY AUXILIARY
HEAT SPEEDS
0
OFF OFF
50%
80%
100% if necessary
50%
Dehumidify
Fast Coil Cooling
and Heating Efficiency
7.5
minutes 3
minutes
1
minute
FAN OPERATION (CFM)
COMPRESSOR OPERATION ON OFF
as required
NOTE:
Direct drive motors have bearings which are permanently
lubricated and under normal use lubrication is not recom-
mended.
From Dwg. 800796a
CFM
SELECTION
LIGHT DIP
SWITCHES
ICM FAN CONTROL
Figure 9
cated on blower housing and in the Service Facts
document included with the unit.
2. The selection of wire and fuse sizes should be made
according to the Minimum Branch CircuitAmpacity
and the Maximum Overcurrent Device listed on the
unit nameplate.
3. Field wiring diagrams for electric heaters and unit
accessories are shipped with the accessory.
4. Wiring must conform to National and Local codes.
Ground unit per Local codes with good safety proce-
dures.
If an electric heater is not installed, connections are
made through the 7/8" knockout into the air handler
junction box to the two power leads and ground wire
connections which are located near the discharge of the
blower
NOTE:
If air handler is used with or without a heater, the 7/8"
electrical entry hole as well as any other cabinet penetrations
must be sealed air tight.

818-GE01D1-9
Installer’s Guide
TWE-E AIR HANDLERS WITH SINGLE STAGE COOLING, 2 STAGE HEAT
TWE-E AIR HANDLERS WITH TWO STAGE COOLING, 2 STAGE HEAT
From Dwg. No. B801074

18-GE01D1-9 9
Installer’s Guide
TWE-E AIR HANDLERS WITH SINGLE STAGE HEAT PUMP
From Dwg. No. B801077
H. CONTROL WIRING
1. Connect wiring between indoor unit, outdoor unit and
thermostat. The use of color-coded low-voltage wires is
recommended.
2. A low voltage terminal board is provided for control
wiring, and is located on the left side of the cross brace
in the center of the unit.
3. Field wiring diagrams are provided which show the
low voltage wiring hookup for a single speed cooling
only system (with supplementary heaters) and a heat
pump system (with supplementary heaters). Plug in
type electrical connectors are provided for use with
supplementary heaters.
IMPORTANT:
When supplementary heaters are installed, inspect to insure
that all packaging material has been removed.
I. AIRFLOW ADJUSTMENT
▲CAUTION
!
Disconnect power to the air handler before changing dip
switch positions. Failure to follow this procedure may result
in equipment damage.

10 18-GE01D1-9 Installer’s Guide
OUTLINE DRAWING FOR TWE031, 037, 040, 049 & 065E13F
From Dwg. 21D800664 Rev. 1
AIRFLOW
TOPVIEW
SIDEVIEW
BOTTOMVIEW
VERTICAL UPFLOW
RETURN
OPENING
DISCHARGE
OPENING
FIGURE 1
DISCHARGE
OPENING
FIGURE 2
FIG. 1 FIG. 2
MODEL NO. J K J K
TWE031E13
12.02
19.22
11.02
18.22
TWE037E13 21.22 20.22
TWE040E13
TWE049E13
TWE065E13 23.72 22.72
MINIMUM UNIT CLEARANCE TABLE
TO
COMBUSTIBLE
MATERIAL
(REQUIRED)
SERVICE
CLEARANCE
(RECOMMENDED)
SIDES 0" 2"*
FRONT 0" 21"
BACK 0" 0"
INLET DUCT 0" 1"
OUTLET DUCT 1"*
*1" FOR THE FIRST 3 FT. OF OUTLET DUCT WHEN ELECTRIC
HEATERS ARE INSTALLED. EXCEPT MODELS BAYHTR1405,1408, AND
1410 ARE APPROVED FOR 0" PLENUM AND DUCT CLEARANCE IN THE
UPFLOW CONFIGURATION ONLY.
MODEL NO. A B C D E F G H Flow
Control Gas Line BRAZE Liq. Line BRAZE
TWE031E13 43 21.50 19.50 15.57 3.65 5.77 3.62 1.89
TXV/NB
3/4 5/16
TWE037E13 45 23.50 21.50 17.57 4.65 6.77 7/8
3/8
TWE040E13 51.75
26 24
18.33
5.90 8.02 3.21 1.48TWE049E13 57.90 27.12 1-1/8
TWE065E13 62.75 27.12 1-1/8