Carrier’s technological leadership
has risen to a new level with the
development of the 38EYA Heat
Pump, the outdoor section of a
superior split heat pump system. This
leadership effort has yielded a
product that delivers proven
performance to the new construction
market.
Puron®, the environmentally
sound refrigerant
uses Puron, the environmentally
sound refrigerant which provides
homeowners with additional peace of
mind because Puron has zero ozonedepletion potential.
In addition, thanks to the
performance advantage of Puron, the
38EYA is extremely efficient with
ratings from 12 to 14 SEER.
Maximum performance and
efficiency are made possible through
the use of the FX4A and FV4A fan
coils, which are custom made for
Puron applications.
Puron refrigerant also protects
homeowners against the future cost
of service from the potentially
increased cost of servicing units
using R-22 as it is phased out due to
legislated production limits.
—The 38EYA
®
®
Copyright 2000 Carrier CorporationForm 38EYA-1PD
AVAILABLE OPTIONS
PressureGuard™/Ease of
Installation
feature of the 38EYA is the patentpending PressureGuard™, which
enables the use of standard line sets
currently used in the industry.
Compressor—The 38EYA features
the efficient Copeland Scroll
compressor, specially designed for
Puron applications, with its thicker
—Another unique
Page 2
shell and an anti-reverse rotation
device for superior reliability and
quiet operation. In addition, each
compressor is mounted on rubber
isolators for additional sound
reduction. Continuous operation is
approved down to -30°F (-34.4°C) in
the heating mode and down to 55°F
(12.8°C) in the cooling mode. (See
heating and performance tables.) The
scroll compressor is covered with a
standard 5-year limited warranty.
Discharge Muffler—Minimizes low-
frequency sound and pressure
pulsation generated by compressor
discharge gas.
Defrost Control Board—
Incorporates a defrost relay, defrost
timer, and low-voltage terminations.
The defrost control is a time and
temperature initiation/termination
control which includes 4 fieldselectable (DIP switch) time periods
of 30, 60, 90, and 120 minutes. The
control includes built-in 5-minute
compressor delay for units equipped
with single-phase scroll compressors.
This control also includes a fieldselectable (DIP switch) Quiet Shift
mode, which if selected, maintains
quiet operation during defrost.
Patent-Pending Accumulator/
Reliable Operation
—Unique to the
38EYA is the patent-pending
accumulator, which ensures an oil
rich flow of refrigerant to the
compressor. This oil return is
especially beneficial during start up
when compressor-protecting
lubrication is needed most.
Built-In Reliable Components—
The 38EYA delivers additional
compressor protection with factory
installed high and low-pressure
switches. Reliable operation is also
optimized with a heavy-duty service
reversing valve.
Thermostatic Expansion Valve
—The 38EYA Heat Pump
(TXV)
must be installed with a Puron TXV
on the indoor coil. The FX4 and FV4
indoor fan coils are factory-equipped
with a bi-flow Puron TXV, which if
installed with this application,
requires no further change. If another
indoor fan coil or furnace coil is used,
an accessory bi-flow Puron TXV
must be installed. See accessory list in
this publication for correct part
number.
WeatherArmor II Protective
Cabinet
—The casing steel is
protected with a galvanized coating
and treated with a layer of zinc
phosphate. A 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
coated for a long-lasting, rustresistant, quality appearance.
Unit Design—All units are equipped
with totally enclosed fan motors for
greater reliability under adverse
weather conditions. The large,
wraparound coil uses copper tube and
enhanced aluminum fin and is
designed for optimum heat transfer
during heating and cooling. The
vertical air discharge carries the
sound and air up and away from
adjacent patio areas and foliage. Coil
can be cleaned with a common garden
hose.
External Service Valves—Both
service valves are brass, front seating
type. 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. The
38EYA has sweat field connections.
Limited Warranty—Standard
1-year limited warranty on parts.
Additional 4-year limited warranty on
compressor.
This heat pump can be part of a Comfort Heat Pump System which
can provide higher heating supply air temperatures, as well as up
to 30 times more humidity removal in cooling mode. A Comfort
Heat Pump System requires the use of a 40FKA (Fan Coil with
Thermidistat Control) or an FV4A Fan Coil and a B-series
HEAT PUMP SYSTEM
2
Thermidistat Control.
301
Packaging
Series
Electrical
3—208/230-1
5—208/230-3
Page 3
T
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S
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CERTIFICATION APPLIES ONLY WHEN THE
COMPLETE SYSTEM IS LISTED WITH ARI.
C
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M
H
P
E
A
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R
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T
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U
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S
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P
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Q
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0
4
2
D
A
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As an ENERGY STAR® Partner, Carrier Corporation has determined that this product meets the ENERGY STAR® guidelines
for energy efficiency.
Air Discharge
Air Quantity (CFM)
Motor HP
Motor RPM
CONDENSER COIL
Face Area (Sq Ft)
Fins per In.
Rows
Circuits
VALVE CONNECTION (In. ID)
Vapor
Liquid
† Charge quantity is for 15 ft of interconnecting tubing. For tubing lengths other than 15 ft, see Residential Split-Systems Long-Line Application Guideline for
additional refrigerant requirements.
NOTE: 1. See unit Installation Instructions for proper installation.
142146180198202248
Copeland
Scroll (ZP)
Puron
4.635.636.638.889.8812.5
Propeller Type, Direct Drive
3/83/85/83/4 ACR3/4
3/83/83/47/81-1/8
3/83/83/47/81-1/8
3/83/87/87/83/4 and 1-1/8
3/83/81-1/87/83/4
* RST — Refrigeration Service Tubing, standard refrigerant grade tubing.
NOTES:
1. Tube diameters are for lengths up to 50 ft. For tubing lengths greater than 50 ft, consult the Application Guideline and Service Manual for Residential SplitSystem Air Conditioners and Heat Pumps using Puron Refrigerant.
2. Refrigerant tubes and indoor coils must be evacuated to 500 microns to minimize contamination and moisture in the system.
UNIT
SIZESERIESOUTDOOR PISTONINDOOR TXV*
024
030
036
042
048
060
* TXV must be installed when indoor coil is not equipped with a Puron approved TXV. TXV listed is for any approved coil
combination. All TXVs are Puron specific bi-flow, hard shutoff.
† For indicator light function, thermostat specified must be used and wired according to service alarm Installation Instructions.
‡ Must be applied on coils not equipped with Puron TXV.
* Do not use in zoning heat pump applications.
† This plate is designed to cover surrounding wall area located behind thermostat.
‡ Thermostat conversion kit is a 24-vac accessory that can turn a 4-wire thermostat application into a 5-wire application. This kit can also be used to replace
a broken thermostat wire, or add an extra wire when needed.
** Outdoor temperature sensor is an accessory for all Carrier electronic thermostats, except the non-programmable air conditioner version and builder’s
thermostats. It allows the temperature at a remote location (outdoors) to be displayed on the thermostat.
The outdoor air temperature sensor
The outdoor air temperature sensor is included with the Thermidistat Control and dual fuel thermostat.
Manual Changeover
Standard Programmable Thermostat—Manual Changeover, 5-2 Day Programmable, °F/°C, 1-Stage Heat/
1-Stage Cool
Outdoor Air Temperature Sensor
Dual Fuel Thermostat — Auto Changeover, 7-Day Programmable, °F/°C, Includes Outdoor Sensor
(TSTATXXSEN01-B)
Thermidistat™ Control — Non-Programmable/Programmable Thermostat with Humidity Control
(For use in Dual Fuel, AC, HP, and 2S applications. Includes Outdoor Air Temperature Sensor.)
Backplate for Non-Programmable Thermostat
Backplate for Programmable Thermostat and Thermidistat™ Control
Backplate for Standard Programmable Thermostat
Backplate for Builder’s Thermostat
Thermostat Conversion Kit (4 to 5 Wire) — 10 Pack
used with the dual fuel thermostat.
4
Page 5
Accessory usage guideline
REQUIRED FOR LOW-AMBIENT
ACCESSORY
Crankcase Heater
APPLICATIONS
(BELOW 55°F)
YesYes
Evaporator Freeze ThermostatYesNo
Compressor Start Assist — Capacitor and RelayYesYes
Puron Low Ambient Pressure SwitchYesNo
Wind Baffle
See Low-Ambient
Pressure Switch Instructions
Support FeetRecommendedNo
Puron Hard Shutoff TXVYes†Yes†
Puron Liquid-Line Solenoid Valve for HeatingNo
* For tubing line sets between 50 and 175 ft and/or 20 ft elevation difference between indoor and outdoor units, refer to the Application Guideline and Service Man-
ual for Residential Split-System Air Conditioners and Heat Pumps using Puron Refrigerant.
† Required for all applications.
REQUIRED FOR LONG-LINE
APPLICATIONS*
(OVER 50 FT)
No
See Long-Line
Application Guideline
Accessory description and usage (Listed alphabetically)
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 and Relay
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.
3. Compressor Start Assist — PTC Type
Solid state electrical device which gives a “soft” boost to the reciprocating 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.
5. Evaporator Freeze Thermostat
An SPST temperature actuated switch which stops unit operation when evaporator reaches freeze-up conditions.
SUGGESTED USE: All units to which Low-Ambient Pressure Switch has been added.
6. Filter Drier— Suction Line
A device for removing contaminants from refrigerant circulating in a heat pump system; 2-direction flow for heat pumps.
SUGGESTED USE: Split-system heat pumps.
7. Inlet Grille Kit
A field-installed enhanced inlet grille to replace the standard inlet grille on residential air conditioners and heat pumps.
SUGGESTED USE: For greater protection against inclement weather, incidental damage, and vandalism.
8. Interface Control (Optimizer II®)
An electric control for controlling a heat pump and gas or oil furnace system for maximum energy savings. It allows heat pump to operate down to a predetermined economic balance
point temperature, then switches to allow furnace operation only below that temperature. KHAIC0101AAA requires outdoor thermostat (Item 11) to be adjusted for economic balance
point temperature.
SUGGESTED USE: For heat pump and gas- or oil-fired furnace combination systems unless Duel Fuel Thermostat or Thermidistat™ Control is used.
9. Isolation Relay
An SPDT relay which switches the Low-Ambient Controller out of the outdoor fan motor circuit when the heat pump switches to heating mode.
SUGGESTED USE: All heat pumps where Low-Ambient Pressure Switch has been added.
10. Liquid-Line Solenoid Valve (LSV)
An electrically operated shutoff valve to be installed at the outdoor unit 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.
SUGGESTED USE: In long-line applications. (Refer to the Residential Split-System Long-Line Application Guideline and Service Manual.)
11. Low-Ambient Pressure Switch
A long life pressure switch which is mounted to outdoor unit service valve. It is designed to cycle the outdoor fan motor in order to maintain head pressure within normal operating
limits (approximately 200 psig to 365 psig). The control will maintain working head pressure at low-ambient temperatures down to 0°F (–17.8°C) when properly installed.
SUGGESTED USE: Cooling operation at outdoor temperatures below 55°F (12.8°C).
12. Outdoor Air Temperature Sensor
A device that allows the temperature at a remote location (outdoors) to be displayed at the thermostat.
SUGGESTED USE: All Carrier programmable thermostats.
13. Outdoor Thermostat
An SPDT temperature actuated switch which turns on supplemental electric heaters when outdoor air temperature drops below set point.
SUGGESTED USE: Heat pump installations with multiple-stage supplemental heaters.
14. Secondary Outdoor Thermostat
An SPDT temperature actuated switch which turns on third stage of supplemental electric heaters when outdoor air temperature drops below the second-stage set point.
SUGGESTED USE: Heat pump installations where 3-stage operation of supplemental heaters is desired.
15. Service Alarm
A current-sensing lockout relay which provides immediate notification that compressor is not operating during a call for heating or cooling. Used with proper room thermostat, a
thermostat signal is turned on signifying service is required. This can minimize electrical cost increase due to operation of supplemental heaters only.
SUGGESTED USE: As a feature to notify owner immediately when the system is not operating most efficiently.
Installations where outdoor design temperature exceeds 105°F (40.6°C).
Units installed with Low-Ambient Pressure Switch.
When unit will be operated below 55°F (12.8°C) outdoor air temperature. (Use with Low-Ambient Pressure Switch.)
All commercial installations.
5
Page 6
Accessory description and usage (Listed alphabetically) continued
16. Thermostatic Expansion Valve (TXV) — Bi-Flow
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, external equalizer tube.
SUGGESTED USE: A TXV specifically designed for Puron refrigerant is required for all installations.
17. 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.)
18. Unit Risers
Six in. tall plastic rails that are used to elevate outdoor units above mounting pad. The risers are adjustable from 24- to 34-in. long.
SUGGESTED USE: Heat pump installations in light to moderate snowfall areas.
Required for use on all zoning systems.
Coastal installations.
Windy areas or where debris can circulate.
Rooftop installations.
* Permissible limits of the voltage range at which unit will operate satisfactorily. Operation outside these limits may result in unit failure.
† Time-delay fuse or Circuit Breaker.
‡ Length shown is as measured 1 way along the wire path between the unit and the service panel for voltage drop not to exceed 2%.
** If wire is applied at ambient greater than 30°C (86°F), consult Table 310-16 of the NEC (ANSI/NFPA 70). The ampacity of nonmetallic-sheathed cable (NM),
trade name ROMEX, shall be that of 60°C (140°F) conductors, per the NEC (ANSI/NFPA 70) Article 336-26.
If other than uncoated (non-plated), 60° or 75°C (140° or 167°F) insulation, copper wire (solid wire for 10 AWG and smaller, stranded wire for larger than
10 AWG) is used, consult applicable tables of the NEC (ANSI/NFPA 70).
FLA — Full Load Amps
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
RLA — Rated Load Amps
NOTE: Control circuit is 24v on all units and requires external power source. Copper wire must be used from service disconnect to unit. All motors/compressors
* Ratings are net values reflecting the effects of circulating fan heat. Supplemental electric heat is not included. Ratings are based on:
Cooling Standard: 80°F (27°C) db 67°F (19°C) wb indoor entering air temperature and 95°F (35°C) db air entering outdoor unit.
High-Temp Heating Standard: 70°F (21°C) db indoor entering air temperature and 47°F (8°C) db 43°F (6°C) wb air entering outdoor unit.
Low-Temp Heating Standard: 70°F (21°C) db indoor entering air temperature and 17°F (–9°C) db 15°F (–10°C) wb air entering outdoor unit.
† Outdoor section/indoor section combination tested in accordance with DOE test procedures for heat pumps. Ratings for other combinations are determined
under DOE computer simulation procedures.
‡ Based on computer simulation. TXV must be Puron compatible and hard shutoff type.
** In most cases, only 1 method should be used to achieve TDR function. Using more than 1 method in a system may cause degradation in performance. Use
either the accessory Time-Delay Relay KAATD0101TDR or a furnace equipped with TDR. All Carrier furnaces are equipped with TDR except for the 58GFA.
†† Indoor Airflow
‡‡ Must replace factory-supplied R-22 TXV with Puron TXV.
SEER — Seasonal Energy Efficiency RatioTC — Total Capacity (Btuh)
COP — Coefficient of PerformanceTDR — Time-Delay Relay
* Detailed cooling capacities are based on indoor and outdoor unit at the same elevation per ARI standard 210/240-94. If additional tubing length and/or
indoor unit is located above outdoor unit, a slight variation in capacity may occur.
† Total and sensible capacities are net capacities. Blower motor heat has been subtracted.
‡ Sensible capacities shown are based on 80°F (27°C) entering air at the indoor coil. For sensible capacities at other than 80°F (27°C), deduct 835 Btuh
(245 kw) per 1000 CFM (480 L/S) of indoor coil air for each degree below 80°F (27°C), or add 835 Btuh (245 kw) per 1000 CFM (480 L/S) of indoor coil air
per degree above 80°F (27°C).
** System kw is total of indoor and outdoor unit kilowatts.
†† At TVA rating indoor condition (75°F edb/63°F ewb). All other indoor air temperatures are at 80°F edb.
EWB—Entering Wet Bulb
18
Page 19
Heat pump heating performance
INDOOR
AIR
EDB CFM
–3 7 172737475767
Capacity
(MBtuh)
Total Int* Kw† Total Int* Kw† Total Int* Kw† Total Int* Kw† Total Int* Kw† Total Int* Kw† Total Int* Kw† Total Int* Kw†
Total
Pwr
Capacity
(MBtuh)
Total
Pwr
OUTDOOR COIL ENTERING AIR TEMPERATURES °F
Capacity
(MBtuh)
Total
Pwr
Capacity
(MBtuh)
Total
Pwr
Capacity
(MBtuh)
Total
Pwr
Capacity
(MBtuh)
Total
Pwr
Capacity
(MBtuh)
Total
Pwr
38EYA024-30, 31 Outdoor Section With FX4ANF030 Indoor Section
* The Btuh heating capacity values shown are net “integrated’’ values from which the defrost effect has been subtracted. The Btuh heating from supplement
heaters should be added to those values to obtain total system capacity.
† The kw values include the compressor, outdoor fan motor, and indoor blower motor. The kw from supplement heaters should be added to these values to
obtain total system kilowatts.
EDB—Entering Dry Bulb
CapacityPowerCapacityPower
Heating
Indoor
SectionSize
COILS + 58U(H,X)V100-20 VARIABLE SPEED FURNACE
COILS + 58U(H,X)V120-20 VARIABLE SPEED FURNACE
Heating
er
NOTE: The performance shown includes the PressureGuard™ cycling the outdoor fan. The ambient temperature that
the outdoor fan cycles depends on the outdoor/indoor combination, indoor airflow, installation practices, and
system maintenance, all of which affect system performance.
24
Page 25
System Design
1. Intended for outdoor installation with free air inlet and outlet. Outdoor fan external static pressure available is less than 0.01-in. wc.
2. Minimum outdoor operating air temperature for cooling mode without low-ambient operation accessory is 55°F (12.8°C).
3. Maximum outdoor operating air temperature for cooling mode is 125°F (51.7°C).
4. Minimum outdoor operating air temperature for heating mode is –30°F (–34.4°C).
5. Maximum outdoor operating air temperature for heating mode is 66°F (18.9°C).
6. For reliable operation, unit should be level in all horizontal planes.
7. Maximum elevation of indoor coil above or below base of outdoor unit is: indoor coil above = 50 ft/indoor coil below = 150 ft (see items 8 and 9 following).
8. For interconnecting refrigerant tube lengths greater than 50 ft and/or elevation differences between indoor and outdoor units greater than 20 ft, consult Residential SplitSystem Application Guideline and Service Manual for Air Conditioners and Heat Pumps using Puron refrigerant.
9. If ANY refrigerant tubing is buried, provide a minimum 6-in. vertical rise to the valve connections at the unit. Refrigerant tubing lengths up to 36 in. may be buried without
further considerations. Buried refrigerant tubing lengths greater than 36 in. are not recommended.
10. Use only copper wire for electric connection at unit. Aluminum and clad aluminum are not acceptable for the type of connector provided.
11. Mixmatches of indoor coil capacity more than 1 size larger than outdoor unit capacity (unless so specified) may result in inadequate indoor comfort.
12. Do not apply capillary tube indoor coils to these units.
13. Factory-supplied filter drier must be installed.
25
Page 26
26
Page 27
27
Page 28
Guide specifications
GENERAL
System Description
Outdoor-mounted, air-cooled, split-system heat pump unit
suitable for ground or rooftop installation. Unit consists of a
hermetic compressor, an air-cooled coil, propeller-type
condenser fan, and a control box. Unit will discharge supply
air upward as shown on contract drawings. Unit will be used
in a refrigeration circuit to match up to a packaged fan coil or
coil unit.
Quality Assurance
Unit will be rated in accordance with the latest edition of
ARI Standard 240.
Unit will be certified for capacity and efficiency, and listed
in the latest ARI directory.
Unit construction will comply with latest edition of ANSI/
ASHRAE and with NEC.
Unit will be constructed in accordance with UL standards
and will carry the UL label of approval. Unit will have C-UL
approval.
Unit cabinet will be capable of withstanding Federal Test
Method Standard No. 141 (Method 6061) 500-hr salt spray
test.
Air-cooled condenser coils will be leak tested at 217 psig
and pressure tested at 450 psig.
Delivery, Storage, and Handling
Unit will be shipped as single package only and is stored
and handled per unit manufacturer’s recommendations.
Warranty (for inclusion by specifying engineer)
U.S. and Canada only.
PRODUCTS
Equipment
Factory assembled, single piece, air-cooled heat pump unit.
Contained within the unit enclosure will be all factory wiring,
piping, controls, compressor, refrigerant charge (Puron®), and
special features required prior to field start-up.
Unit Cabinet
Unit cabinet will be constructed of galvanized steel,
bonderized, and coated with a powder coat paint.
Fans
Condenser fan will be direct-drive propeller type,
discharging air upward.
Air-Cooled, Split-System
Heat Pump
38EYA
2 to 5 Tons Nominal
Condenser fan motors will be totally enclosed, 1-phase type
with class B insulation and permanently lubricated bearings.
Shafts will be corrosion resistant.
Fan blades will be statically and dynamically balanced.
Condenser fan openings will be equipped with steel wire
safety guards.
Compressor
Compressor will be hermetically sealed.
Compressor will be mounted on rubber vibration isolators.
Condenser Coil
Condenser coil will be air cooled.
Coil will be constructed of aluminum fins mechanically
bonded to copper tubes which are then cleaned, dehydrated,
and sealed.
Refrigeration Components
Refrigeration circuit components will include liquid tube
shutoff valve with sweat connections, suction tube shutoff
valves with sweat connections, system charge of Puron®
refrigerant, POE compressor oil, accumulator, and reversing
valve.
Operating Characteristics
The capacity of the unit will meet or exceed Btuh at a
suction temperature of °F. The power consumption at
full load will not exceed kw.
Combination of the unit and the evaporator or fan coil unit
will have a total net cooling capacity of Btuh or greater
at conditions of CFM entering air temperature at the
evaporator at °F wet bulb and °F dry bulb, and air
entering the unit at °F.
The system will have an SEER of Btuh/watt or greater
at DOE conditions.
Electrical Requirements
Nominal unit electrical characteristics will be v,
phase, 60 hertz. The unit will be capable of satisfactory
operation within voltage limits of v to v.
Unit electrical power will be single point connection.
Control circuit will be 24v.
Special Features
Refer to section of this literature identifying accessories and
descriptions for specific features and available enhancements.
Carrier Corporation • Indianapolis, IN 462313-00
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4Page 28Catalog No. 523-776Printed in U.S.A.PC 101Form 38EYA-1PD
Tab5a 5a
Replaces: NEW
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