38TXA 13.0 SEER
Air Conditioner With R-410A
Installation and Start-Up Instructions
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause personal injury or property damage.
Consult a qualified installer, service agency, or your distributor or
branch for information or assistance. The qualified installer or
agency must use factory-authorized kits or accessories when
modifying this product. Refer to the individual instructions pack-
aged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for brazing operations. Have fire extinguisher
available. Read these instructions thoroughly and follow all
warnings or cautions attached to the unit. Consult local building
codes and the National Electrical Code (NEC) for special instal-
lation requirements.
Recognize safety information. This is the safety-alert symbol
.
When you see this symbol on the unit or in instructions and
manuals, be alert to the potential for personal injury.
Understand the signal word DANGER, WARNING, or CAU-
TION. These words are used with the safety-alert symbol. DAN-
GER identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies hazards which
could result in personal injury or death. CAUTION is used to
identify unsafe practices which would result in minor personal
injury or product and property damage.
A92446
Fig. 1—38TXA
INSPECT EQUIPMENT — File claim with shipping company
prior to installation if shipment is damaged or incomplete. Locate
unit rating plate on unit corner panel. (See Fig. 4.) It contains
information needed to properly install unit. Check rating plate to
be sure unit matches job specifications.
R-410A systems operate at higher pressures than standard
R-22 systems. Do not use R-22 service equipment or com-
ponents on R-410A equipment.
Step 2—Install on a Solid, Level Mounting Pad
If conditions or local codes require unit be attached to pad, tiedown
bolts should be used and fastened through knockouts provided in
unit base pan. Refer to unit mounting pattern in Fig. 4. to
determine base pan size and knockout hole location.
Before installing or servicing system, always turn off main
power to system. There may be more than 1 disconnect
switch. Turn off accessory heater power if applicable. Elec-
trical shock can cause personal injury or death.
When installing, allow sufficient space for airflow, wiring, refrig-
erant piping, and service. Allow 30-in. clearance to service end of
unit and 48 in. above unit. For proper airflow, a 6-in. clearance on
1 side of unit and 12 in. on all remaining sides must be maintained.
Maintain a distance of 24 in. between air conditioners. Position so
snow, ice, and water from roof or eaves cannot fall directly on unit.
INSTALLATION
Specifications for this unit in residential new construction market
require outdoor unit, indoor unit, refrigerant tubing sets, metering
device, and filter drier listed in presale literature. There can be no
deviation. Consult Application Guideline and Service Manual to
obtain required unit changes for specific applications, and for R-22
retrofit.
On rooftop applications, locate unit at least 6 in. above roof
surface. Where possible, place unit above a load-bearing wall.
Arrange supporting members to adequately support unit and
minimize transmission of vibration to building. Consult local
codes governing rooftop applications.
Step 3—Install TXV (Optional)
Step 1—Check Equipment and Jobsite
UNPACK UNIT — Move to final location. Remove carton taking
care not to damage unit.
The accessory thermostatic expansion valve is specifically de-
signed to operate with R-410A. Do not use an R-22 TXV. An
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book
Tab 3a 2a
1
4
PC 101
Catalog No. 563-813
Printed in U.S.A.
Form 38TXA-1SI
Pg 1
1-96
Replaces: New
AIR IN
AIR DISCHARGE
3
/8" DIA TIEDOWN KNOCKOUTS
(2) PLACES IN BASEPAN
NOTES:
1. Allow 30 in. (762 mm) clearance to service end of
unit, 48 in. (1219 mm) above unit, 6 in. (152 mm) on one side, 12 in. (305 mm)
on remaining side, and 24 in. (610 mm) between
units for proper airflow.
AIR IN
2. Minimum outdoor operating ambient in cooling mode is
55° F (12.8° C) (unless low ambient control is used) max 125° F (51.7° C).
5. Series designation is the 13th position of the unit model number.
6. Center of gravity
D
C
L
E
SERIAL
PROD
MODEL
PISTON
ID
OD
C
FACTORY CHARGED R-22
LBS
Kg
VOLTS
HZ
AIR DISCHARGE
AIR IN
POWER SUPPLY
PH
PERMISSIBLE VOLTAGE AT UNIT
MAX
UNIT RATING
PLATE
MIN
VAPOR LINE CONN
SUITABLE FOR OUTDOOR USE
COMPRESSOR
FIELD POWER SUPPLY CONN
7
VOLTS AC
A
/
IN. DIA HOLE WITH
8
1
PH
HZ
AIR DISCHARGE
1
/
IN. DIA KNOCKOUT
AND
8
RLA
LRA
B
3
FAN MOTOR
1
/
IN. DIA KNOCKOUT
8
VOLTS AC
PH
HZ
FLA
FIELD CONTROL
DESIGN/TEST PRESSURE GAGE
HI PSI
LO PSI
kPa
kPa
SUPPLY CONN
7
MINIMUM CIRCUIT AMPS
MAX OVERCURRENT PROTECTIVE DEVICE
/
IN. DIA HOLE
8
ACCESS
PANEL
TYPE
USA
CANADA
MAX FUSE
MAX HACR CKT-BKR
MAX CKT-BKR
N/A
N/A
3
®
/
IN. DIA LIQUID
8
®
LINE CONN
CARRIER CORP
INDIANAPOLIS IN
46206
313948-401
REV
A
A92471
A
B
C
In.
D
In.
4
E
UNIT
SIZE
In.
In.
30
In.
024-060
34-15/16
8-3/16
9-3/4
Fig. 4—Unit Reference Drawing
In some cases noise in the living area has been traced to gas
pulsations from improper installation of equipment.
Installation of filter drier in liquid line is required.
Step 6—Install Liquid-Line Filter drier (See Fig. 5)
OUTDOOR UNITS CONNECTED TO FACTORY-APPROVED
INDOOR UNITS — Outdoor unit contains correct system refrig-
erant charge for operation with tested indoor unit listed in presale
literature when connected by 15 ft of field-supplied or factory
accessory tubing. Check refrigerant charge for maximum effi-
ciency.
1. Braze 5-in. connector tube to liquid service valve. Wrap filter
drier with damp cloth.
2. Braze filter drier between connector tube and liquid tube to
indoor coil. Flow arrow must point towards indoor coil.
Table 1—Refrigerant Connections and Recom-
mended Liquid and Vapor Tube Diameters (In.)
LIQUID-LINE
FILTER-DRIER
LIQUID
LIQUID
Connect
VAPOR
Connect
UNIT
SIZE
SERVICE
Tube
Tube
A
VALVE
Diameter
Diameter
Diameter
Diameter
024
3/8
3/8
3/8
3/8
3/8
5/8
5/8
3/4
030, 036
042, 048
060
3/8
3/4
3/8
7/8
7/8
CONNECTOR
TUBE
3/8
7/8
1-1/8
Note: 1. Tube diameters are for lengths up to 50 ft. For tubing lengths greater
than 50 ft, consult Application Guideline and Service Manual for air condition-
ers with R-410A.
A95509
Fig. 5—Liquid-Line Filter drier
3
Step 7—Refrigerant Tubing
Connect vapor tube to fitting on outdoor unit vapor service valve
and connect liquid tube to filter drier. (See Fig. 5.)
The cabinet must have an uninterrupted or unbroken ground
according to NEC, ANSI/NFPA 70-1996, or local codes to
minimize personal injury if an electrical fault should occur.
This may consist of electrical wire or conduit approved for
electrical ground when installed in accordance with existing
electrical codes. Failure to follow this warning could result in
an electrical shock, fire, or death.
A brazing shield MUST be used when tubing sets are being
brazed to the service valves to prevent damage to the painted
unit surface.
Relieve pressure and recover all refrigerant before system
repair or final unit disposal to avoid personal injury or death.
Use all service ports and open all flow control devices,
including solenoid valves.
To avoid personal injury or death, do not supply power to unit
with compressor terminal box cover removed.
CONNECT GROUND AND POWER WIRES — Connect ground
wire to ground connection in control box for safety. Connect
power wiring to contactor as shown in Fig. 6.
To avoid valve damage while brazing, service valves must be
wrapped with a heat-sinking material such as a wet cloth.
DISCONNECT
PER N.E.C. AND/OR
LOCAL CODES
SWEAT CONNECTION — Use refrigerant grade tubing. Service
valves are closed from factory and ready for brazing. After
wrapping service valve and filter drier with wet cloth, tubing set
can be brazed to service valve and filter drier using either silver
bearing or non-silver bearing brazing material. Consult local code
requirements. Refrigerant tubing and indoor coil are now ready for
leak testing. This check should include all field and factory joints.
CONTACTOR
FIELD POWER
WIRING
BLUE
3 PHASE ONLY
Step 8—Evacuate
FIELD GROUND
WIRING
Refrigerant tubes and indoor coil should be evacuated using the
recommended deep vacuum method of 500 microns. The alternate
triple evacuation method may be used if the procedure outlined in
the Service Manual is followed. Always break a vacuum with dry
nitrogen.
GROUND
LUG
A94025
Fig. 6—Line Power Connections
CONNECT CONTROL WIRING — Route 24-v control wires
through control wiring grommet and connect to brown and blue
pigtails supplied in unit splice box. (See Fig. 7.)
Never use the system compressor as a vacuum pump.
Step 9—Make Electrical Connections
Use No. 18 AWG color-coded, insulated (35° C minimum) wire.
If thermostat is located more than 100 ft from unit (as measured
along the control voltage wires), use No. 16 AWG color-coded
wire to avoid excessive voltage drop.
Be sure field wiring complies with local and national fire, safety,
and electrical codes, and voltage to system is within limits shown
on unit rating plate. Contact local power company for correction of
improper voltage. See unit rating plate for recommended circuit
protection device. (See Fig. 4.)
Use furnace transformer, fan coil transformer, or accessory trans-
former for control power, 24v/40va minimum.
NOTE: Operation of unit on improper line voltage constitutes
NOTE: Use of available 24-v accessories may exceed the mini-
mum 40-va power requirement. Determine total transformer load-
ing and increase transformer capacity or split load with an
accessory transformer as required.
abuse and could affect unit reliability. See unit rating plate.
NOTE: Use only copper wire between disconnect switch and
unit.
NOTE: Install branch circuit disconnect per NEC of adequate
size to handle unit starting current, but not larger than maximum
fuse size shown on unit rating plate. Locate disconnect within sight
from and readily accessible from unit, per Section 440-14 of NEC.
Step 10—Install Electrical Accessories
Refer to individual instructions packaged with kits or accessories
when installing.
Step 11—Start-Up
ROUTE GROUND AND POWER WIRES — Remove access
panel and control box cover to gain access to unit wiring. Extend
wires from disconnect through power wiring hole provided and
into unit control box. (See Fig. 4.) Size wires per NEC but not
smaller than minimum wire size shown in presale literature.
1. After system is evacuated, fully back seat (open) liquid and
vapor service valves. Unit is shipped with valve stem(s) front
seated and caps installed.
2. Replace stem caps after system is opened to refrigerant flow
(back seated). Replace caps finger tight and tighten additional
1/12 turn with wrench.
3. Close electrical disconnects to energize system.
4. Be sure thermostat set point is below indoor ambient tempera-
ture. Set room thermostat at COOL and fan at ON or AUTO,
as desired. Operate unit for 15 minutes. Check system
refrigerant charge.
4
5. Factory charge and superheat charging method are shown on
unit information plate. (See Fig. 4.) R-410A refrigerant
cylinders contain a dip tube which allows liquid refriger-
ant to flow from cylinder in upright position. Charge
R-410A units with cylinder in upright position and a
commercial-type metering device in manifold hose. Charge
refrigerant into suction-line.
Do not vent refrigerant to atmosphere. Recover for system
repair or final unit disposal.
CARE AND MAINTENANCE
For continuing high performance and to minimize possible equip-
ment failure, it is essential that periodic maintenance be performed
on this equipment. Consult servicing contractor or User’s Manual
for the proper frequency of maintenance. Frequency of mainte-
nance may vary depending upon geographic areas, such as coastal
applications.
Do not disable low-pressure switch during a condenser pump
down. Compressor damage may occur if run at a negative
suction pressure.
Step 1—Leave User’s Manual With Homeowner
Explain system operation and maintenance procedures outlined in
User’s Manual.
Compressor damage may occur if system is overcharged.
Service valve gage ports are not equipped with Schrader
valves. To prevent personal injury, make sure valves are fully
back seated before removing gage port caps. Wear safety
glasses and gloves when handling refrigerant.
ATTENTION INSTALLERS AND SERVICE TECHNICIANS!
AIR CONDITIONER WITH R-410A—QUICK REFERENCE GUIDE
• R-410A refrigerant operates at 50%-70% higher pressures than R-22. Be sure that servicing equipment
and replacement components are designed to operate with R-410A.
• R-410A refrigerant cylinders are rose colored.
• R-410A refrigerant cylinders have a dip tube which allows liquid to flow out of cylinder in upright
position.
• R-410A systems should be charged with liquid refrigerant. Use a commercial type metering device in the
manifold hose.
• R-410A, as with other HFCs, is only compatible with POE oils.
• Vacuum pumps will not remove moisture from oil.
• Do not use liquid-line filter driers with rated working pressures less than 600 psig.
• Do not install a suction-line filter drier in liquid line.
• POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
• Wrap all filter driers and service valves with wet cloth when brazing.
• A liquid-line filter drier is required on every unit.
• Do not use an R-22 TXV.
• If indoor unit is equipped with a TXV, it must be changed to an R-410A TXV.
• Never open system to atmosphere while it is under a vacuum.
• When system must be opened for service, break vacuum with dry nitrogen and replace filter driers.
• Do not vent R-410A into the atmosphere.
• Observe all warnings, cautions, and bold text.
• Do not use capillary tube indoor coils.
5
CORPORATE
NON-PROGRAMMABLE
THERMOSTAT
CORPORATE
NON-PROGRAMMABLE
THERMOSTAT
FA, FB, FC,
FD, FF
FAN COIL
AIR
CONDITIONER
MODEL AC
SINGLE
STAGE
AIR
R
R
24 VAC HOT
MODEL AC
CONDITIONER
FURNACE
R
C
R
24 VAC HOT
24 VAC COM
C
W/W1
Y/Y2
G
24 VAC COM
C
SEE
C
C
NOTE 2
HEAT STAGE 1
COOL STAGE 1
INDOOR FAN
W2
SEE
W/W1
C
NOTE 2
HEAT STAGE 1 W/W1
Y/Y2
G
Y/Y2
G
COOL STAGE 1
INDOOR FAN
G
A94385
A94384
CORPORATE
PROGRAMMABLE
THERMOSTAT
MODEL AC
CORPORATE
PROGRAMMABLE
THERMOSTAT
MODEL AC
FA, FB, FC,
FD, FF
AIR
SINGLE
CONDITIONER
FAN COIL
AIR
STAGE
CONDITIONER
FURNACE
R
R
G
24 VAC HOT
INDOOR FAN
HEAT STAGE 1
COOL STAGE 1
NOT USED
R
R
G
24 VAC HOT
INDOOR FAN
HEAT STAGE 1
COOL STAGE 1
NOT USED
G
W/W1
Y/Y2
G
W2
W/W1
Y/Y2
W/W1
Y/Y2
SEE
NOTE 2
O/W2
O/W2
C
SEE
NOTE 2
Y1/W2
NOT USED
C
Y1/W2
NOT USED
24 VAC COM
NOT USED
NOT USED
C
B
L
C
24 VAC COM
NOT USED
NOT USED
C
C
B
L
OPTIONAL
OUTDOOR
SENSOR
S1
S2
OPTIONAL
OUTDOOR
SENSOR
S1
S2
CONNECTION
CONNECTION
A94386
A94387
Fig. 7—Typical 24-v Circuit Connections
6
CORPORATE
PROGRAMMABLE
THERMOSTAT
MODEL AC
FK4C
AIR
FAN COIL CONDITIONER
R
G
R
24 VAC HOT
INDOOR FAN
G
W1
Y/Y2
O
CORPORATE
NON-PROGRAMMABLE
THERMOSTAT
FK4C
AIR
HEAT STAGE 1 W/W1
COOL STAGE 1 Y/Y2
MODEL AC
FAN COIL CONDITIONER
R
C
R
24 VAC HOT
24 VAC COM
NOT USED
NOT USED
O/W2
C
SEE
NOTE
2
Y1/W2
HEAT STAGE 1 W/W1
COOL STAGE 1 Y/Y2
Y1
W2
C
W1
SEE
NOTE
2
C
C
Y/Y2
G
24 VAC COM
NOT USED
NOT USED
C
B
L
INDOOR FAN
G
DH
W2
O
COOL STAGE 1 S1
INDOOR FAN
S2
Y1
DH
A95502
A95503
NON-CORPORATE
NON-PROGRAMMABLE
THERMOSTAT
NON-CORPORATE
NON-PROGRAMMABLE
THERMOSTAT
FA, FB, FC,
FD, FF
FAN COIL
AIR
CONDITIONER
MODEL AC
SINGLE
AIR
STAGE
MODEL AC
CONDITIONER
FURNACE
R
R
24 VAC HOT
R
R
24 VAC HOT
C
C
SEE
NOTE 2
C
W
Y
HEAT STAGE 1
COOL STAGE 1
INDOOR FAN
W2
SEE
W/W1
C
NOTE 2
HEAT STAGE 1
COOL STAGE 1
INDOOR FAN
W
Y
Y/Y2
G
G
G
G
A95282
A95283
Fig. 7—Typical 24-v Circuit Connections (Continued)
7
NON-CORPORATE
NON-PROGRAMMABLE
THERMOSTAT
FK4C
AIR
MODEL AC
FAN COIL CONDITIONER
R
R
24 VAC HOT
C
HEAT STAGE 1
COOL STAGE 1
INDOOR FAN
W
Y
W1
SEE
NOTE
2
C
Y/Y2
G
G
W2
O
Y1
DH
A95501
Fig. 7—Typical 24-v Circuit Connections (Continued)
NOTES:
1. Corporate thermostat wiring diagrams are only accurate for model numbers beginning with TSTAT_______.
2. Some units are equipped with pressure switches, temperature switch, or 5 minute compressor cycle protection. Connect 24-v field wiring
to factory-provided stripped leads.
3. Wiring must conform to NEC or local codes.
4. To stage the electric resistance heat, consult outdoor thermostat Installation Instructions.
LEGEND
24 VOLT FACTORY WIRING
24 VOLT FIELD WIRING
FIELD SPLICE CONNECTION
C
CONTACTOR
A95500
Fig. 8—Typical 24-v Circuit Connections Legend
Copyright 1996 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231
38txa1si
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book
Tab 3a 2a
1
4
PC 101
Catalog No. 563-813
Printed in U.S.A.
Form 38TXA-1SI
Pg 8
1-96
Replaces: New
|