Carrier Puron 38TXA Operation manual

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Product
Data
38TXA (60 Hz)
Air Conditioner
with R-410A
Sizes 024 thru 048
Copyright 1996 Carrier Corporation Form 38TXA-1PD
The 38TXA achieves energy-
efficient cooling performance
up to 14 SEER when used with
components as designated by
manufacturer. All models are listed
withUL,ARI,c-UL,CEC,Green Seal,
and Energy Star.
The Tech 2000 Silencer System
features the InViroFlow design,
energy-efficient fan and motor,
advanced sound hood, and
compressor vibration isolator plate.
InViroFlow Design for improved
airflow pattern requiring less energy.
Energy-Efficient Fan and Fan
Motor
adds to quiet operation while
moving air more efficiently.
Sound Hood to muffle noise from
operation.
Compressor Vibration Isolator
Plate
eliminates compressor
vibration transmission to the base
pan thus ensuring quiet operation.
FEATURES/BENEFITS
Electrical Range — All units are
offered in 208/230v single phase
only.
Wide Range of Sizes — Available
in 5 nominal sizes from 024 through
048 to meet the needs of residential
and light commercial applications.
Weather-Armor II Cabinet —
Steel is galvanized and coated with a
layer of zinc phosphate. A coat of
modified polyester powder coating is
then applied and baked-on, providing
each unit with a hard, smooth finish
that will last for many years.
All screws on cabinet exterior are
coatedforalong-lasting,rust-resistant,
quality appearance.
Totally Enclosed Fan Motor —
Means greater reliability under
rain conditions, and dependable
performance for many years.

2
Model number nomenclature
The data in this publication is displayed for all series, however every series may not be available from manufacturer.
Physical data
* Tube sizes are for runs up to 50 ft. For tube set over 50 ft, consult Long-Line Application Guideline for R-410A.
NOTE: See unit Installation Instructions for proper installation.
38TXA 024 3 0 1
Electric Air Conditioner Packaging
Series
Nominal Capacity
018 — 18,000 Btu 042 — 42,000 Btu
024 — 24,000 Btu 048 — 48,000 Btu
030 — 30,000 Btu 060 — 60,000 Btu
036 — 36,000 Btu
Electrical
3 — 208/230-1
UNIT SIZE-SERIES 024-0 030-0 036-0 042-0 048-0
OperatingWeight (Lb)
215 210 240 248 296
COMPRESSOR
Copeland Scroll
Manufacturer andType
REFRIGERANT
R-410A
Control
AccuRater  (Bypass Type)
CHARGE (Lb)
6.00 6.00 6.88 8.75 10.13
COND FAN
Propeller Type, Direct Drive
Air Discharge
Vertical
Air Qty (CFM)
2600
2500
2800
3300
COND COIL
Copper Tube, Aluminum Plate Fin
Face Area (Sq ft)
15.2 12.2 15.2 18.3 18.3
VALVE CONNECT. (In. ID)
Sweat
Vapor
5/8
3/4 7/8
Liquid
3/8
REFRIGTUBES* (In. OD)
Vapor
5/8
3/4 7/8
Liquid
3/8
Permanent-split-capacitor-typemotors
provide more economical operation.
Built-In-Reliable Components —
Includes high-pressure switch for
high-pressureprotection;low-pressure
switch for loss of charge; and a liquid-
line filter drier to remove any moisture
from the system.
Unit Design — Copper tube,
enhanced aluminum fin coil is
designed for optimum heat transfer.
Vertical air discharge carries sound
and hot condenser air up and away
from adjacent patio areas and foliage.
Heat pump style drain pan for easy
removal of water, dirt, and leaves.
Application Versatility — The
38TXA can be combined with a wide
variety of evaporator coils and
blower packages to provide quiet,
dependable comfort. Unit can be
installed on a roof or at ground level.
External Service Valves — Both
service valves are brass, back seating
type with sweat connections. Valves
are externally located so refrigerant
tube connections can be made quickly
and easily. Each valve has a service
port for ease of checking operating
refrigerant pressures.
Easy Serviceability — One access
panel provides access to electrical
control box and compressor.
Removal of top gives access to coil.
Removal of wire grille gives access
to fan motor.
Compressor Protection — Each
scroll compressor motor is protected
with internal temperature- and
current-sensitive overloads. For
improved serviceability each
compressor (024-048) is equipped
with a compressor terminal plug.
Sound Hood — A thick, sound
dampening material wrapped around
the compressor, to muffle operational
noise.
Refrigerant — The earth-friendly
refrigerant we use in the 38TXA is
R-410A. This advanced refrigerant
contains no chlorine which can
contribute to ozone depletion in our
atmosphere, so it’s a smart choice for
homeowners who are concerned with
protecting our environment, now and
for future generations.And it’s a smart
choice for anyone interested in high-
efficiency cooling.
LimitedWarranty — Standard 1 year
on parts, with an additional 9 years on
compressor.

3
ACCURATER
®
PISTON CHART
* Piston listed is for any approved non-capillary tube coil combination.
Piston is shipped with outdoor unit and must be installed in approved
indoor coil.
UNIT SIZE - SERIES PISTON* IDENTIFICATION NO.
024-0 61
030-0 63
036-0 70
042-0 73
048-0 78
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CERTIFICATION APPLIES ONLY WHEN THE
COMPLETE SYSTEM IS LISTED WITH ARI. CERTIFICATION OF MANUFACTURING SITE.
As an ENERGY STAR partner, Carrier Corporation has
determined that this product meets the ENERGY STAR
guidelines for energy efficiency.
This product meets Green Seal criteria for
manufacturing, energy efficiency, sound levels,
and packaging.It contains no CFCs or HCFCs.

4
Accessories
† See low-ambient controller Installation Instructions for application.
‡ Fan Motor with ball bearings required.
ORDERING NO. DESCRIPTION
KSASF0101AAA
Support Feet — All Sizes
KSAHS0401AAA Start Assist — Capacitor/Relay — Sizes 024–042
KSAHS0801AAA Start Assist — Capicitor/Relay — Size 048
KAACS0201PTC Start Assist — PTC — All Sizes
KAALS0201LLS Liquid Solenoid Valve — All Sizes
KSACY0101AAA Cycle Protector — All Sizes
P251-0083 (RCD) Low-Ambient Controller — All Sizes
KAAWS0101AAA† Winter Start Control — All Sizes
KAAFT0101AAA† Evaporator FreezeThermostat — All Sizes
Standard High-Pressure Switch — All Sizes
Standard Low-Pressure Switch — All Sizes
KAATD0101TDR Time-Delay Relay — All Sizes
KAACF0201MED Coastal Filter — Sizes 024–048
KAACH1201AAA Crankcase Heater — Sizes 024–042
Standard Crankcase Heater — Size 048
Standard Sound Hood — All Sizes
KAATX1901HSO Thermostatic Expansion Valve (Hard Shutoff) — Size 024
KAATX2001HSO Thermostatic Expansion Valve (Hard Shutoff) — Size 030
KAATX2101HSO Thermostatic Expansion Valve (Hard Shutoff) — Size 036
KAATX2201HSO Thermostatic Expansion Valve (Hard Shutoff) — Size 042
KAATX2301HSO Thermostatic Expansion Value (Hard Shutoff) — Size 048
KH45LG140 (RCD) Filter Drier (Suction Line) — Sizes 024–036
KH45LG141 (RCD) Filter Drier (Suction Line) — Sizes 042–048
32LT660004‡ (RCD) MotorMaster® Control — All Sizes
HC38GE230 (RCD) Ball Bearing Fan Motor — Sizes 024–042
HC40GE230 Ball Bearing Fan Motor — Size 048
THERMOSTAT/SUBBASE PKG DESCRIPTION
TSTATCCNAC01-A
Thermostat, Auto Changeover, Non-Programmable, ° F/ ° C, 1-Stage Heat, 1-Stage Cool
TSTATCCPAC01-A Thermostat, Auto Changeover, 7-Day Programmable, ° F/ ° C, 1-Stage Heat, 1-Stage Cool
--HH--07AT-213 Thermostat, Manual Changeover, Non-Programmable, ° F, 1 Stage Heat, 1-Stage Cool
TSTATCCSEN01 Outdoor Sensor

5
Accessory Description and Usage
1. Coastal Filter
A mesh screen inserted under the top cover and inside the base pan to protect the condenser coil from salt damage without restricting airflow.
SUGGESTED USE: In geographic areas where salt damage could occur.
2. Compressor Start Assist—Capacitor/RelayType
Start capacitor and start relay gives ‘‘hard’’ boost to compressor motor at each start-up.
SUGGESTED USE: Installations where interconnecting tube length exceeds 50 ft.
Installations where outdoor design temperature exceeds 105
° F (40.6 ° C).
3. Compressor Start Assist—PTC Type
Solid-state electrical device which gives a ‘‘soft’’boost to the compressor at each start-up.
SUGGESTED USE: Installations with marginal power supply.
4. Crankcase Heater
An electric resistance heater which mounts to the base of the compressor to keep the lubricant warm during off cycles. Improves compressor lubrication on restart and
minimizes chance of refrigerant slugging. May or may not include a thermostat control.
SUGGESTED USE: When interconnecting tube length exceeds 50 ft.
When unit will be operated below 55
° F (12.8 ° C) outdoor air temperature. (Use with low-ambient controller.)
All commercial installations.
5. Cycle Protector
Solid-state timing device which prevents compressor rapid recycling. Control provides an approximate 5-minute delay after power to the compressor has been interrupted
for any reason, including normal room thermostat cycling.
SUGGESTED USE: Installations in areas where power interruptions are frequent.
Where user is likely to “play” with the room thermostat.
All commercial installations.
Installations where interconnecting tube length exceeds 50 ft.
High-rise applications.
6. Evaporator FreezeThermostat
An SPST temperature actuated switch which stops unit operation when evaporator reaches freeze-up conditions.
SUGGESTED USE: All units where winter start control (item 14) has been added.
7. Liquid Solenoid Valve (LSV)
An electrically operated shutoff valve to be installed at the outdoor or indoor unit (depending on tubing configuration) and which stops and starts refrigerant liquid flow
in response to compressor operation. Maintains a column of refrigerant liquid ready for action at next compressor operation cycle.
NOTE: Compressor start assist — capacitor/relay type (Item 2) must also be used, if the system contains a reciprocating compressor.
SUGGESTED USE: For improved system performance in air conditioners for certain combinations of indoor and outdoor units (Refer to ARI Unitary Directory).
In certain long-line applications. (Refer to Application Guideline.)
8. Low-Ambient Controller
Head pressure controller is a cycle control device activated by a temperature sensor mounted on a header tube of the outdoor coil. It is designed to cycle the outdoor fan
motors in order to maintain condensing temperature within normal operating limits (approximately 130 to 110
° F high, 70 to 50 ° low). The control will maintain working
head pressure at low-ambient temperatures down to –20
° F when properly installed.
SUGGESTED USE: Cooling operation at outdoor temperatures below 55
° F (12.8 ° C).
9. MotorMaster® Control
A fan speed control device activated by a temperature sensor. Designed to control condenser fan motor speed in response to the saturated, condensing temperature during
operation in cooling mode only. For outdoor temperatures down to –20
° F, it maintains condensing temperature at 100 ° F ± 10 ° F.
SUGGESTED USE: Cooling operation at outdoor temperatures below 55
° F.
All commercial installations.
10. Sound Blanket/Shield/Hood
Wrap-around sound attenuation cover for the compressor. Reduces the sound level by about 0.2 bels.
SUGGESTED USE: Unit installed closer than 15 ft to quiet areas — bedrooms, etc.
Unit installed between 2 houses less than 10 ft apart.
11. Support Feet
Four stick-on plastic feet which raise the unit 4 in. above the mounting pad. This allows sand, dirt, and other debris to be flushed from the unit base; minimizes corrosion.
SUGGESTED USE: Improve sound rating.
Coastal installations.
Windy areas or where debris is normally circulating.
Rooftop installations.
12. Thermostatic Expansion Valve (TXV) Kit
A modulating flow control valve which meters refrigerant liquid flow rate into the evaporator in response to the superheat of the refrigerant gas leaving the evaporator. Kit
includes valve, adapter tubes, and external equalizer tube. Hard shutoff type valves are available.
SUGGESTED USE: In certain long-line applications.
Commercial installations.
13. Time-Delay Relay
An SPST delay relay which briefly continues operation of the indoor blower motor to provide additional cooling after the compressor cycles off.
SUGGESTED USE: For improved efficiency ratings for certain combinations of indoor and outdoor units. (Refer to ARI Unitary Directory.)
14. Winter Start Control
An SPST delay relay which bypasses the low-pressure switch for approximately 3 minutes to permit start up for cooling operation under low-load conditions.
SUGGESTED USE: All air conditioners where low-ambient controller has been added.