Trane 2TEE3C31A1000A Assembly instructions

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ConvertibleVariable Speed-
Communicating Air Handlers 2 112- 5 Ton
2/4TEE3C31A1000A, 2/4TEE3C37A1000A,
2/4TEE3C40A1000A, 2/4TEE3C49A1000A,
2/4TE E3C65A1000A
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
18-GELID1-4
IMPORTANT -- This Document is customer property and is to remain with this unit. Please return to service information
pack upon completion of work.
This Air Handler can be configured for Communicating
or 24VAC modes. Using fully Communicating or 24VAC
modes, the Air Handler can support multi or single
stage Heat Pump, cooling only, or cooling with electric
heat applications. Combined with a communicating
Comfort Control only, the Air Handler will support a
single stage 24VAC cooling outdoor unit.
THIS INFORMATION IS FOR USE BY INDIVIDUALS
HAVING ADEQUATE BACKGROUNDS OF ELECTRICAL
AND MECHANICAL EXPERIENCE. ANY ATTEMPT TO
REPAIR A CENTRAL AIR CONDITIONING PRODUCT
MAY RESULT IN PERSONAL INJURY AND/OR PROP-
ERTY DAMAGE. THE MANUFACTURER OR SELLER
CANNOT BE RESPONSIBLE FOR THE INTERPRETA-
TION OF THIS INFORMATION, NOR CAN IT ASSUME
ANY LIABILITY IN CONNECTION WITH ITS USE.
TO PREVENT SHORTENING ITS SERVICE LIFE, THE
AIR HANDLER SHOULD NOT BE USED DURING THE
FINISHING PHASES OF CONSTRUCTION OR REMOD-
ELING. The low return air temperatures can lead to the
formation of condensate. Condensate in the presence
of chlorides and fluorides from paint, varnish, stains,
adhesives, cleaning compounds, and cement creates a
corrosive condition which may cause rapid deteriora-
tion of the cabinet and internal components.
CONTENTS
General Information ...........................................
Installation Limitations& Recommendations........................
Two Piece Cabinet Disassembly
Unit Installation ...................................................
Vertical Upflow......................................................................
Vertical Uownflow .................................................................
Horizontal Left .......................................................................
Horizontal Right
Duct Connections
Refrigerant Piping ..............................................
Brazing to Evaporator Section .......................... _9
Condensate Drain Piping ...................................
Electrical-Power Wiring ...................................
Airflow Adjustment .............................................. ,_
Unit Test Mode ......................................................
User Interface Menus ..........................................
Air Handler Flash Codes .............................. iii>i
Field Wiring ...........................................................
Outline Drawings .................................................
Checkout Procedures .........................................
A. GENERAL INFORMATION
These instructions do not cover all variations in sys-
tems or provide for every possible contingency. Should
further information be desired or particular issues arise
which are not covered sufficiently by this manual, con-
tact 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
convertible to downflow or horizontal left. Refer to Sec-
tion C beginning on page 4 for additional information.
INSPECTION
Check carefully for any shipping damage. This must be
reported to and claims made against the transportation
company immediately. Cheek to be sure all major com-
ponents are in the unit. Any missing parts should be re-
ported to your supplier at once, and replaced with au-
thorized parts only.
© 2008 Trane

Installer's Guide
FOR AIR HANDLERS NOT EQUIPPED WITH A FACTORY
INSTALLED ELECTRIC HEATER, A FIELD INSTALLED
HEATER IS AVAILABLE FROM THE DEALER. ONLY
HEATERS BUILT BY TRANE ARE APPROVED FOR USE
IN THE AIR HANDLER. These heaters have been de-
signed 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 name-
plate. Heaters that are not factory approved could
cause damage and are not covered under equipment
warranty.
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.
This area may also be used for other purposes, includ-
ing an electric hot water heater - but in no ease shall
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 sup-
ply 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. Pursuant to Florida Building Code 13-610.2.A.2.1,
this unit meets the criteria for a factory sealed
Air Handler.
.
.
.
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 ad-
ditional information.
Penetration around the Refrigerant lines must be
sealed and Electrical inlets need to be sealed at
both the Low and the High Voltage.
It is recommended that the outline drawing be stud-
ied and dimensions properly noted and checked
against selected installation site. By noting in ad-
vance which knockouts are to be used, proper clear-
ance allowances can be made for installation and
possible future service.
WHEN THE AIR HANDLER WITH SUPPLEMENTARY
HEATER IS TO BE INSTALLED IN THE DOWNFLOW PO-
SITION ON COMBUSTIBLE FLOORING AN ACCES-
SORY SUB-BASE (TAYBASE101 FOR 2/4TEE3C31A,
TAYBASE100 FOR 2/4TEE3C37A, TAYBASE102 FOR 2/
4TEE3C40A-65A) MUST BE USED. SEE FIGURE 1.
7. If supplementary heat is to be added, power supply
must be sufficient to carry the load.
8. For Air Handlers not equipped with a factory in-
stalled electric heater, a field installed heater is
available from Trane.
FLOOR OPENING - SIZE
MODEL NO. A B
TAYBASE 100 23-3/4 14-13/16
TAYBAS E101 21-3/4 14-13/16
TAYBASE 102 26-3/4 14-13/16
AIR HANDLER SUB-BASE
!
/
B
Figure I MATERIAL,
2 18-GEl 1D1-4

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 any wiring enters.
IF AIRHANDLER IS USED WITHOUT A FACTORY FURNISHED
SUPPLEMENTARY HEATER, A PLATE IS REQUIRED TO COVER
THE OPEN HOLE IN THE AIR FLOW SYSTEM
]
14 17"
i
1/4" HOLES (4)
ACCESSORY BAY99X123
-_ 3/8"
-,i-
From Dwg. 21B140413
Figure 2
9. If field installed electric heaters are applied, mini-
mum airflow settings, unit and duct clearances to Steps
combustibles must be maintained as stated on the and 4)
Air Handler rating nameplate. 1.
2.
10. If the unit is installed without a return air duct, ap- 3.
plicable local codes may limit this Air Handler to in- 4.
stallation only in a single story residence & within 5.
conditioned space. 6.
11. If the outdoor unit is to be installed later, or by oth- 7.
ers, then installation of the Air Handler must be 8.
made to allow access for refrigerant lines, or attach 9.
refrigerant lines to Air Handler when installing.
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 for 2/4TEE3C37 (23.5" wide),
TAYPLNM101 for 2/4TEE3C31 (21.5" wide),
TAYPLNM102 for 2!4TEE3C40, 49, & 65 (26" wide)].
Connecting return duct directly 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 traits are approved for draw-through application
only.
Installer's Guide
18. Flow-through Bypass Humidifiers
Excessive bypass air may cause water blow-off,
which will adversely affect system operation and air
cleaner performance. To verify bypass airflow, fol-
low the Bypass Humidifier Pre-Installation Check-
out and Set-Up Procedures available through your
local distributor. Ask for publication number 18-
CH37Dl-1.
Steam and Flow-through Fan Power Duct-
mounted Humidifiers
Follow the humidifier installation instructions.
These should only be installed on the supply air
side of the system.
B. TWO PIECE CABINET DISASSEMBLY
(OPTIONAL)
NOTE: For easier installation into tight areas, the 5 ton
air handlers can be disassembled, moved to an attic or
other space, and then reassembled.
10.
11.
12.
13.
14.
for disassembly and reassembly (See Figures 3
Disconnect wiring.
Remove center bracket.
Remove blower assembly.
Remove coil.
Cut foil tape at cabinet parting line.
Remove top 8 screws. See Figure 3.
Separate upper and lower sections.
Set air handler in place.
Attach screws - insure gaskets are aligned
along flange.
Use foil tape to seal - use minimum 3" foil tape.
Insert coil.
Reinstall blower assembly.
Reinstall center bracket.
Reconnect wiring.
NOTE: In Downflow, remove coil before blower by re-
versing steps 3 and 4.
Figure 3 Spear Locations
18-GE11 D1-4 3

Installer's Guide
Figure 4 Two-Piece Wrapper Spear Closeup
u
f_
C. UNIT INSTALLATION
UPFLOW
a. For maximum efficiency, the horizontal drip
tray should be removed. See Figures 5, 6 and 7.
Tray removal requires that the coil be removed
by sliding the coil out on the coil channel sup-
ports. For the TEE3C40-65 units, there is a coil
support tab at the top of the coil connected to the
case that must be removed first. Remove 1 inch
insulation strip covering the lip of the drip tray.
The tray is detached by removing the two screws
at the drain pan. Remove the two screws holding
the two brackets at the top of the coil. Remove
drip tray by gently breaking the seal between the
drip tray and drain pan.
b. Remove the factory installed baffle assembly
from the apex of the coil by using a 5/16"
nutdriver to remove the screws. Replace this
baffle with the factory supplied narrow coil baffle
using the screws removed previously. See Figure
11.
When instalfing the narrow coil baffle, make sure to
align the baffle up with the holes so NOT to puncture
the coil tubing.
C.
d.
e.
g.
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.
If a return air duct is connected to the air han-
dler, it must be the same dimensions as shown in
the outline drawing on page 18.
Pedestal and unit should be isolated from the
foundation using a suitable isolating material.
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. See Figure 9.
After ductwork connections are made, seal air-
tight and per local codes.
DOWNFLOW
a.
b.
For maximum efficiency, the horizontal drip
tray should be removed. See Figures 5, 6 and 7.
Tray removal requires that the coil be removed
by sliding the coil out on the coil channel sup-
ports. For the TEE3C40-65 units, there is a coil
support tab at the top of the coil connected to the
case must be removed first. Remove 1 inch insu-
lation strip covering the lip of the drip pan. 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. Remove drip tray
by gently breaking the seal between the drip tray
and drain pan.
Remove the factory installed baffle assembly
from the apex of the coil by using a 5/16"
nutdriver to remove the screws. Replace this
baffle with the factory supplied narrow coil baffle
using the screws removed previously. See Figure
11. Reinstall coil assembly.
When installing the narrow coil baffle, make sure to
align the baffle up with the holes so NOT to puncture
the coil tubing.
NOTE: Installation of the downflow baffle kit included
with unit is required on downflow applications. See
Figure 10.
c. Remove the front shield from the coil. See Fig.
10.
d. Detach the coil from the drain pan by removing 4
screws as shown in Figure 10.
4 18-GEl 1D1-4

Figure 5 Drip Pan Foam Removal
\
\
@
Figure 6 Horitzontal Drip Pan Removal
@/
Figure 7 Drip Pan Bracket Removal
Installer's Guide
e. Remove the front triangular baffle from the coil
and install the 1/2" wide gasket provided per Fig-
ure 10. Trim the gasket length to fit the baffle.
Reinstall the baffle to coil, with gasket material
compressed against the coil.
f. Install the water blow-offbaffles provided on each
side of the coil with the flange at the top as
shown in Figure 10. The bottom of the baffle is to
be as close to the bottom of the coil as possible.
g. Install the 7/8" wide gasket in each side of the
drain pan as shown in Figure 11 (sect. X-X).
h. The 5 ton model (2!4TEE3C65A) requires 2 water
diverter baffles to be placed underneath the coil
on the inside edge of the drain pan. See Figure
10. Fill the bend in the baffle which fits the inner
edge of the drain pan with non-acetic acid RTV
type adhesive/sealant before installing the baffle.
i. 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 bot-
tom. The unit is now in downflow position with
front access. Do not reattach coil support tab.
j. When supplementary heaters are used, accessory
subbase (TAYBASE101 for 2/4TEE3C31A, TAY-
BASE100 for 2/4TEE3C37A, and TAYBASE102 for
2/4TEE3C40-65A) must be used. See Figure 1.
k. If a return duct is connected to the air handler, it
must be the same dimensions as the return
opening shown in the outline drawing on page
18.
1. 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. See Figure 9.
m. After ductwork connections are made, seal air-
tight and per Local codes.
18-GE11 D1-4 5

Installer's Guide
Figure 8 Mounting Installation Options
for Horizontal Applications
HORIZONTAL LEFT
a.
b.
c.
For maximum efficiency and Customer ease of
filter maintenance, it is recommended that a
properly sized remote filter and grille be in-
stalled for horizontal applications. Airflow should
not exceed the face velocity of the filter being
used. The factory installed filter should
then be removed from the unit.
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.
Remove the factory installed baffle assembly
from the apex of the coil by using a 5/16"
nutdriver to remove the screws. For the
TEE3C40-65 units, there is a coil support tab at
the top of the coil connected to the case must be
removed first. Replace this baffle with the factory
supplied narrow coil baffle using the screws re-
moved previously. See Figure 11.
When instalfing the narrow coil baffle, make sure to
align the baffle up with the holes so NOT to puncture
the coil tubing.
d.
J
Figure 9
The coil is then inserted back into the cabinet on
the coil channels located near the center of the
unit. Do not reattach coil support tab. Also to-
tate the coil access panel 180 degrees and install.
The unit is now horizontal left with front access.
e. 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
with rails, the air handler only needs to be sus-
pended at both ends. See Figure 8.
f. 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 line to a separate
drain line (no trap is needed in this line) and ter-
minate according to national and local codes.
6 18-GEl 1D1-4

Installer's Guide
SCREWS TO
REMOVE COIL
7/8"
Figure 10 DOWNFLOW BAFFLE KIT
DISCARD
TRAY
TRIANGULAR
BAFFLE
FRONT
SHIELD
SECT. X-X
(TYP. BOTH SIDES)
1/2" GASKET
INSIDE SURFACE
OF BAFFLE SCREWS TO
REMOVE COIL
WATER _,
BLOW-OFF _ /_°_@,/ ,.,,,WATER__ kk°@°_
BAFFLES "_ /__', _--_ _o°o°o\,._
ATTACH WITH "_"--/_o rLon/_) "_°o°°_,
2 SCREWS _'_ " "" /"_'_4
EACH SIDE I , -... ,/ ,-,.J,J
_LL WITH SEALANT
j. 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 on page
18.
k. 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. See Figure 9.
1. After ductwork connections are made, seal air-
tight and per Local codes.
HORIZONTAL RIGHT
a. For maximum efficiency and Customer ease of
flter maintenance, it is recommended that a
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.
For Maximum Efficiency
on Horizontal Left_
_flow and Downflow
Remove Replace
and with
Discard Narrow
Baffle
Figure 11
b. Unit is shipped from the factory in the upflow or
horizontal right configuration. Unit conversion is
not required.
18-GE11 D1-4 7

Installer's Guide
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 8.
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
(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 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 on page
18.
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 to seal all unused electri-
cal knockouts. See Figure 9.
j. After ductwork connections are made, seal air-
tight and per local codes.
Figure 12 FlangeAttachment
D. DUCT CONNECTIONS
The supply and return air ducts should be connected to
the unit with flame retardant duct connectors. Convert-
ible duct flanges are provided on the discharge opening
to provide a "flush fit" for 3/4" or 1-1/2" duct board appli-
cations, see the Outline drawing on page 18 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.
Control box must be removed to install or service
heater accessory or communicating controls. See Fig-
ure 13.
fo- -_.
\
/
/
/
i,
Figure 13 _....
/
/
/
NOTE: Do NOT cover up control box screws with duct
work.
NOTE: Any duct board return connection can be made
to the sides of the unit using tape or mastic.
E. REFRIGERANT PIPING
IMPORTANT:
Refrigerant piping must be routed to maintain service
access to blower compartment and provide easy re-
moval of filter access panel and filter.
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. Over-
heating of the sensing bulb will affect the functional
characteristics and performance of the air handler.
NOTE: Penetration around the Refrigerant lines must
be sealed and Electrical inlets should 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 proce-
dures are included in those instructions. Read those
instructions before starting installation of refriger-
ant lines.
8 18-GEl 1D1-4

Installer's Guide
BRAZE SHIELD
/Figure 14
F. BRAZING TO EVAPORATOR SECTION
NOTE: A brazing shield is provided in the information
pack accompanying this unit. This shield fits over the
refrigerant fittings while brazing. Wet the shield before
brazing. See Figure 14.
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 squared-off, en-
suring the tube is still round and free of burrs at
the connecting end. Clean the tubing to prevent
contaminants from entering the system.
3. Run refrigerant tubing into the stub sockets of in-
door unit coil. Refrigerant line openings must be
completely sealed.
4.Braze and evacuate according to indoor and outdoor
installation instructions.
5. Seal around refrigerant lines.
PAINTED AREAS OF UNIT MUST BE SHIELDED
DURING BRAZING.
G. CONDENSATE DRAIN PIPING
NOTE: Make certain that the unit has been installed in a
level position to ensure proper draining.
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 right connection is the primary drain.
See Figure 15.
Two secondary drain connections are provided for the
different orientations (See Figure 15). The lower of the
two secondary drains should be connected as a backup
to prevent condensate overflow by a blocked primary
drain. The weep hole in center of drain coupling area
should be sealed with caulk or RTV except in downflow
unless secondary drain is connected.
f_
23/4" NPT
Secondary
drain
connection
Seal weep
hole except
for Downflow
configuration Y_"
3/4" NPT
Primary drain
/connection
Figure 15
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 16 &
17. Do not use preformed 3/4" PVC running
traps.
The use of Field fabricated or manufactured traps
as shown in Figures 16 & 17 is acceptable. The
manufactured trap shown in Figure 16 allows for a
float switch option to be added. Refer to the manu-
facturers data and instructions for details.
Manufactured Traps
EZT-105
2" MINIMUM
__! 2'' MINIMUM
Figure 16
Field Fabricated Trap
2"MIN. I
!
I
Close as possible
Trap must be within 4'
of air handler condensate
drain connection. Figure 17
18-GE11 D1-4 9

Installer's Guide
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 main-
tenance (See Figure 16 & 17).
4. Do not use reducing fittings in the condensate drain
lines.
blower. 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 electrical knockouts.
NOTE: If Air Handler is used with or without a heater,
the electrical entry hole as well as any other cabinet
penetrations must be sealed air tighL
5. Slope the drain lines downward a minimum of 1/4" I.
per foot. 1.
6. Insulate the primary drain to prevent sweating
where pipe temperature could meet or fall below
dewpoint temperatures.
7. Provide means for drainage to prevent winter
freeze-up of condensate line.
8. Do not connect the drain line to a closed drain sys-
tem.
9. Use Teflon _'_tape on the Air Handler drain line con-
neetions! Do Not Use pipe joint compound or PVC/
CPVC cement!
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. Sup-
port the condensate piping and traps outside the unit
to prevent strain on the drain coupling.
H. 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
located on inside blower panel 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 Circuit Ampacity
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 following recognized
safety procedures.
If an electric heater is not installed, the Knockout Plate pro-
vided in the Accessory Kit MUST be installed on the air han-
dler and the conduit terminated to it. The electrical connec-
tions are made using the two power leads and ground wire
connections which are located near the discharge of the
.
.
CONTROL WIRING
Connect wiring between indoor unit, outdoor unit
and Comfort Control. The use of color-coded low-
voltage wires is recommended.
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.
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.
J. AIRFLOW ADJUSTMENT
Blower speed changes are made using the User Inter-
face mounted on the communicating Comfort Control
box. The Air Handler control board controls the variable
speed motor.
Table 1 -- Control Wiring
ComfortLink TM II Control Wiring
WIRE SIZE MAX. WIRE LENGTH*
18 AWG 250 FT
NEC Class II Wiring - 24 VOLTS
WIRE SIZE MAX. WIRE LENGTH**
18 AWG 150 FT
16 AWG 225 FT.
14 AWG 300 FT.
* The maximum total cable length for the entire Comfort
Control communicating system is 500 ft. 18 AWG.
* * Maximum total length of low voltage wiring fi'om outdoor
unit, to indoor unit, and to Comfort Control.
NOTE: Direct drive motors have bearings which are
permanently lubricated and under normal use lubri-
cation is not recommended.
10 18-GELID1-4