These dependable split systems
match Carrier's 40RU or 39 Series
indoor-air handlers with the versatile
outdoor 38AP condensing units for a
wide selection of commercial cooling
solutions.
• Split condensing units compatible
with ASHRAE 90.1
• Condenser coils feature the
Novation
microchannel coil technology
• 38APS single-circuit unit has up to
3 rotary scroll compressors
• 38APD unit has up to 6 rotary scroll
compressors with 2 independent
circuits
• Standard scroll compressor units
operate as low as 33% (single
circuit) or 15% (dual circuit) of
nominal capacity
• Optional digital scroll compressors
allow incremental unloading down
to 10% (single circuit) or 5% (dual
circuit) of nominal capacity for VAV
applications
• Protection against high discharge
and low suction refrigerant
pressure, and low oil pressure
®
heat exchanger with
A38-7095
Features/Benefits
The 38AP condensing unit
offers the utmost in system
070 UNIT
configuration and control
adaptability. Its premiumquality standard components
ensure durable, efficient, and
reliable operation.
The 38AP units offer high unit EERs
(Energy Efficiency Ratios) up to 11.6
and IPLVs (integrated part load values)
up to 16.2. These units provide greater efficiency than similar units in the
marketplace, which translates into
year-round operating savings.
Copyright 2009 Carrier CorporationForm 38AP-2PD
Features/Benefits (cont)
The latest safety standards for 38AP
units are certified to UL (Underwriters
Laboratories) and CSA (Canadian
Standards Association) standards, ETL
approved.
Versatility
The 38AP Series condensing units feature up to 6 compressors and 2 refrigerant circuits, and can be matched with
a wide variety of air-handling units.
Condensing unit circuits on sizes 025050 can supply a single air handler or
2 separate air handlers. Standard units
have scroll compressors and digital
scrolls are available as an option. This
option of digital control closely matches building loads and allows fine incremental adjustments to the variance in
load.
Durable construction
All 38AP units have weatherized cabinets constructed of heavy-duty galvanized steel prepainted with corrosionresistant baked enamel. Inside and outside surfaces are protected to ensure
long life and good appearance. The
durable, galvanized steel, prepainted
components exceed the requirements
of the 500-hour salt spray test per
ASTM (American Society for Testing
and Materials) B117.
All 38AP units have Novation
exchangers with microchannel coil
technology. The microchannel heat exchanger (MCHX) coils provide longterm reliability, high performance heat
transfer, and significant savings in refrigerant charge. E-coated MCHX is
offered as an option for harsh industrial or coastal conditions.
®
heat
Reliability
The 38AP condensing units feature
highly reliable, hermetic scroll compressors. Each 38AP unit is capable of
unloading in staging sequence of scroll
compressors. Compressors are mounted on rails with vibration isolators to
provide quiet operation and reduced
component stress.
The 38AP units have single or dual
independent circuits; they provide inherent backup capability. Each circuit
is also protected by the following safety
features:
• Short-cycle protection
• Low superheat protection
• Loss of refrigerant charge
protection
• Reverse rotation protection
• Suction and discharge pressure
transducers
• High refrigerant pressure switch
(discharge)
• Circuit breakers or fuses for short
circuit protection of compressors
and outdoor fans
• Suction line accumulator for each
refrigerant circuit
Easier installation and service
The 38AP units are equipped with
hinged control-box access doors, control interface terminal boards, liquid
line shutoff valves, and suction line service valves.
Quantity222222 3 3 3 3
RPM
Diameter (in.)30
Total Watts (60 Hz)2750275027502750275027503500350035003500
Total Watts (50 Hz)2300230023002300230023002900290029002900
CONDENSER COILMCHX Type
No. Coils per Circuit1
sq ft27.127.133.933.933.933.967.867.867.867.8
Shrouded Axial Fan - Direct Drive
850 (60 Hz), 700 (50 Hz)
TEMPERATURE RELIEFFusible Plug on Liquid Lines of Each Circuit - 210 F
CONNECTIONS (in.) ODF (CKT A/CKT B)
Suction Line 1
Liquid Line
3
/8 / 13/815/813/8 / 13/815/813/8 / 13/815/
5
/8 / 5/
5
5
/
8
/8 / 5/
8
5
5
/
8
/8 / 5/
8
8
15/8 / 15/
8
7
5
/
8
/8 / 5/
21/
8
8
15/8 / 15/
8
7
5
/
8
/8 / 5/
21/
8
8
8
7
/
8
MAXIMUM HEIGHT FOR 3° F SUBCOOLING (ft)†75757575757575757575
CAPACITY PER CIRCUIT (%) (CKT A/CKT B)50/5010050/5010050/5010054/4610048/52100
MINIMUM UNIT CAPACITY (%)50505050505023332333
*Typical operating charge with 25 ft of interconnecting piping. Operating charge is
approximate for maximum system capacity. Unit is factory supplied with nitrogen
holding charge. Refrigerant charge for dual circuit units is the total for both
circuits.
†Maximum vertical separation between evaporator coil and condensing unit if con-
densing unit is below the evaporator.
NOTE: Refer to Loading Sequences tables in Application Data section on page 85
or contact Application Engineering for detailed capacity step data.
*Typical operating charge with 25 ft of interconnecting piping. Operating charge is
approximate for maximum system capacity. Unit is factory supplied with nitrogen
holding charge. Refrigerant charge for dual circuit units is the total for both
circuits.
†Maximum vertical separation between evaporator coil and condensing unit if con-
densing unit is below the evaporator.
NOTE: Refer to Loading Sequences tables in Application Data section on page 85
or contact Application Engineering for detailed capacity step data.
*Typical operating charge with 7.62 m of interconnecting piping. Operating charge
is approximate for maximum system capacity. Unit is factory supplied with nitrogen holding charge. Refrigerant charge for dual circuit units is the total for both
circuits.
†Maximum vertical separation between evaporator coil and condensing unit if con-
densing unit is below the evaporator.
NOTE: Refer to Loading Sequences tables in Application Data section on page 85
or contact Application Engineering for detailed capacity step data.
*Typical operating charge with 7.62 m of interconnecting piping. Operating charge
is approximate for maximum system capacity. Unit is factory supplied with nitrogen holding charge. Refrigerant charge for dual circuit units is the total for both
circuits.
†Maximum vertical separation between evaporator coil and condensing unit if con-
densing unit is below the evaporator.
NOTE: Refer to Loading Sequences tables in Application Data section on page 85
or contact Application Engineering for detailed capacity step data.
available for optimum durability. Novation heat exchangers
with microchannel coil technology are offered coated or
uncoated to match coil protection to site conditions. The
Carrier Electronic Catalog (E-Cat) can be used to determine whether or not corrosion protection is recommended
for particular applications in coastal/marine environments.
Following the input of the requested data, the E-Cat program output will advise the appropriate coil to be used.
Other factors described in "Selection Guide: Environmental
Corrosion Protection, Novation Heat Exchanger with Microchannel Coil Technology" catalog number 04-58104201 must also be considered to determine if corrosion protection is required.
Low sound fans provide a specially designed system of
fan propellers and stacks that reduce sound without reducing unit performance. The factory-installed fan option is
compatible with the Motormaster
Compressor blankets provide additional sound reduction when used with low sound fans. Blankets are available
only on units with the low sound fan.
Security grilles/hail guards consist of louvered, sheet
metal panels which securely fasten to the chiller and provide condenser coil protection against hail and physical
damage.
Long line length check valves are required for liquid
line installation on all linear line length applications
of more than 100 ft (30.5 m). For any 025-030 size
dual-circuit unit application where evaporator is located
higher than the condensing unit, check valves are required
for linear line length above 55 ft (16.8 m). The check valve
®
V option.
option prevents charge migration to compressor. Check
valves are also available as field-installed accessories.
Digital compressor control allows incremental unloading for a closer match to building load. Refer to Loading
Sequences tables in Application Data section on page 85.
High short circuit current rating interrupt provides a
short circuit current rating protection for the unit up to
65,000 A on 460-v, 380/415-v, and 208/230-v units or
25,000 A on 575-v units.
Motormaster
®
V low-ambient control provides con-
trol of outdoor-fan motor operation to maintain head pressure at low outdoor ambient temperatures down to 20 F
( 29 C) for 50 and 60 Hz units. Only one factory-installed
low ambient temperature kit per unit is required. This
option also requires field-installed wind baffles. The
Motormaster V low-ambient control is also available as a
field-installed accessory.
Non-fused disconnect includes factory-installed nonfused disconnect capability for power and control located
at the unit.
ComfortLink™ controls with scrolling marquee
display module is used for accessing condensing unit
information, reading sensor values, and testing the condensing unit. The marquee display is a 4-key, 4-character,
16-segment LED (light-emitting diode) display. Eleven
mode LEDs are located on the display as well as an Alarm
Status LED. The display shows all of the ComfortLink
control codes (with 60-character expandable clear language), plus set points, time of day, temperatures, pressures, and superheat. Additional information can be displayed all at once with the accessory Navigator™ display.
9
–
–
Options and accessories (cont)
Packaging options include bottom skid with standard
coil protection and bottom skid, top crate with bag. Standard coil protection is also included on all unit packaging.
Energy management module (EMM) provides energy
management capabilities to minimize condensing unit
energy consumption. The EMM is also available as a fieldinstalled accessory.
from the compressor through the floor and into the conditioned space. The neoprene isolator pads measure
thick (24 in. x 3 in.).
Long line length check valves are required for liquid
line installation on all linear line length applications
of more than 100 ft (30.5 m). For any 025-030 size dualcircuit unit application where evaporator is located higher
than the condensing unit, check valves are required for linear line length above 55 ft (16.8 m). The check valve option prevents charge migration to compressor. Check
valves are also available as a factory-installed option.
Motormaster
trol of outdoor-fan motor operation to maintain head pressure at low outdoor ambient temperatures down to 20 F
( 29 C) for 50 and 60 Hz units. Only one field-installed
low ambient temperature kit per unit is required. This accessory also requires field-installed wind baffles. The
Motormaster V low-ambient control is also available as a
factory-installed option.
®
V low-ambient control provides con-
1
/4 in.
Navigator™ display module provides a portable, hand
held display module for convenient access to unit status,
operation, configuration and troubleshooting diagnostics
capability. The 4-line, 80-character LCD (liquid crystal
display) display provides clear language information in
English, French, Spanish or Portuguese. The weatherproof
enclosure and industrial grade extension cord make the
Navigator module ideally suited for outdoor applications.
Magnets located on the back of the module allow
attachment of any sheet metal component for hands free
operation.
Energy management module provides energy
management capabilities to minimize condensing unit
energy consumption. The EMM is also available as a factory-installed option.
BACnet* translator control provides an interface between the unit and a BACnet Local Area Network (LAN,
i.e., MS/TP EIA-485).
LON (local operating network) translator control
provides an interface between the unit and a local operating network (i.e., LonWorks
Remote enhanced display accessory kit contains a remotely mounted 40-character per line, 16-line display panel for unit diagnostics.
Touch Pilot™ display is a cost-effective, touch-screen,
remote-mount device that can be used in lieu of the remote
enhanced display.
†
FT-10A ANSI/EIA-709.1).
*Sponsered by ASHRAE (American Society of Heating, Refrigerating
and Air Conditioning Engineers).
†Registered trademark of Echelon Corporation.
10
Dimensions
38AP UNITS, SIZES 025-030
UNIT
STANDARD
WEIGHT, lb (kg)
CENTER OF GRAVITY,
in. (mm)
HEIGHT,
in. (mm)
POWER ENTRY,
in. (mm)
SERVICE VALVE
CONNECTIONS, in. (mm)
XYHPSuctionLiquid
Standard
38APS0251077 (489)17.8 (452)36.9 (937)
61.0 (1549)24.9 (632)
1
5
/
8
(41)
5
/
8
(16)
38APD0251095 (497)17.8 (452)37.0 (940)1
3
/
8
(35)
5
/
8
(16)
38APS0271240 (563)18.2 (462)37.6 (955)
73.1 (1857)36.9 (937)
1
5
/
8
(41)
5
/
8
(16)
38APD0271258 (571)18.2 (462)37.6 (955)1
3
/
8
(35)
5
/
8
(16)
38APS0301246 (565)18.2 (462)37.5 (953)1
5
/
8
(41)
7
/
8
(22)
38APD0301264 (573)18.2 (462)37.6 (955)1
3
/
8
(35)
5
/
8
(16)
Low Sound
38APS0251113 (505)17.8 (452)36.9 (937)
66.5 (1689)24.9 (632)
1
5
/
8
(41)
5
/
8
(16)
38APD0251131 (513)17.8 (452)37.0 (940)1
3
/
8
(35)
5
/
8
(16)
38APS0271276 (579)18.2 (462)37.6 (955)
78.6 (1996)36.9 (937)
1
5
/
8
(41)
5
/
8
(16)
38APD0271294 (587)18.2 (462)37.6 (955)1
3
/
8
(35)
5
/
8
(16)
38APS0301282 (582)18.2 (462)37.5 (953)1
5
/
8
(41)
7
/
8
(22)
38APD0301300 (590)18.2 (462)37.6 (955)1
3
/
8
(35)
5
/
8
(16)
NOTES:
1. Be sure to use a wet rag to remove all valve cores before brazing field piping.
2. Do not cap or otherwise obstruct the liquid line temperature relief.
3. A
7
/
8
in. (22.4 mm) diameter hole is provided for locating field power wiring. Actual hole size
required depends on field wire sizing.
4. A 0.437 in. (11.1 mm) diameter hole is used for mounting unit.
5. Unit must have clearances as follows:
Top - Do not restrict.
Coil End - 72 in. (1829) from solid surface.
Panel Side - 48 in. (1219) per NEC (National Electrical Code).
6. Unit height dimension for standard and low sound unit with stack fan option.
7. Installation in a pit is not recommended.
8. Unit can be handled using the fork truck lift pockets.
9. Dimensions shown in inches (mm).
10. Weight does not include unit refrigerant charge.
a38-7101
11
Dimensions (cont)
UNIT
STANDARD
WEIGHT, lb (kg)
CENTER OF GRAVITY,
in. (mm)
HEIGHT,
in. (mm)
SERVICE VALVE
CONNECTIONS, in. (mm)
XYHSuctionLiquid
Standard
38APS0401968 (893)35.0 (869)44.0 (1118)
73.0 (1854)
2
1
/
8
(54)
7
/
8
(22)
38APD0402094 (950)33.7 (856)44.1 (1120)1
5
/
8
(41)
5
/
8
(16)
38APS0501977 (897)34.9 (886)44.0 (1118)2
1
/
8
(54)
7
/
8
(22)
38APD0502120 (961)33.4 (848)44.1 (1120)1
5
/
8
(41)
5
/
8
(16)
38APD0602227 (1010)34.4 (874)44.1 (1120)1
5
/
8
(41)
5
/
8
(16)
Low Sound
38APS0402022 (917)35.0 (869)44.0 (1118)
78.5 (1994)
2
1
/
8
(54)
7
/
8
(22)
38APD0402148 (974)33.7 (856)44.1 (1120)1
5
/
8
(41)
5
/
8
(16)
38APS0502031 (921)34.9 (886)44.0 (1118)2
1
/
8
(54)
7
/
8
(22)
38APD0502174 (986)33.4 (848)44.1 (1120)1
5
/
8
(41)
5
/
8
(16)
38APD0602299 (1043)34.4 (874)44.1 (1120)1
5
/
8
(41)
5
/
8
(16)
38AP UNITS, SIZES 040-060
NOTES:
1. Be sure to use a wet rag to remove all valve cores before brazing field piping.
2. Do not cap or otherwise obstruct the liquid line temperature relief.
3. A
7
/
8
in. (22.4 mm) diameter hole is provided for locating field power wiring.
Actual hole size required depends on field wire sizing.
4. A 0.437 in. (11.1 mm) diameter hole is used for mounting unit.
5. Unit must have clearances as follows:
Top - Do not restrict.
Coil End - 72 in. (1829) from solid surface.
Panel Side - 48 in. (1219) per NEC (National Electrical Code).
6. Unit height dimension for standard and low sound unit with stack fan option.
7. Installation in a pit is not recommended.
8. Unit can be handled using the fork truck lift pockets.
9. Dimensions shown in inches (mm).
10. Sizes 040 and 050 units have 3 condenser fans. Size 060 units have 4 con-
denser fans.
11. Weight does not include unit refrigerant charge.
1. Be sure to use a wet rag to remove all valve cores before brazing field piping.
2. Do not cap or otherwise obstruct the liquid line temperature relief.
3. A
7
/
8
in. (22.4 mm) diameter hole is provided for locating field power wiring.
Actual hole size required depends on field wire sizing.
4. A 0.437 in. (11.1 mm) diameter hole is used for mounting unit.
5. Unit must have clearances as follows:
Top - Do not restrict.
Coil, Panel and Rear Side - 72 in. (1829) from solid surface.
6. Unit height dimension for standard and low sound unit with stack fan option.
7. Installation in a pit is not recommended.
8. Unit can be handled using crane. Refer to service installation instructions.
9. Dimensions shown in inches (mm).
10. Weight does not include unit refrigerant charge.
a38-7103
13
Dimensions (cont)
UNIT
STANDARD
WEIGHT, lb (kg)
CENTER OF GRAVITY,
in. (mm)
HEIGHT,
in. (mm)
SERVICE VALVE CONNECTIONS,
in. (mm)
Suction
Liquid
XYHCircuit ACircuit B
Standard
38APD0802610 (1184)67.6 (1716) 40.2 (1020)
73.0 (1854)
2
1
/
8
(54)1
5
/
8
(41)
7
/
8
(22)
38APD0902835 (1286)72.4 (1839) 43.3 (1099)2
1
/
8
(54)
7
/
8
(22)
38APD1002844 (1290)72.6 (1844) 43.3 (1099)2
1
/
8
(54)
7
/
8
(22)
Low Sound
38APD0802700 (1225)67.6 (1716) 40.2 (1020)
78.5 (1994)
2
1
/
8
(54)1
5
/
8
(41)
7
/
8
(22)
38APD0902943 (1335)72.4 (1839) 43.3 (1099)2
1
/
8
(54)
7
/
8
(22)
38APD1002952 (1339)72.6 (1844) 43.3 (1099)2
1
/
8
(54)
7
/
8
(22)
38AP UNITS, SIZES 080-100
NOTES:
1. Be sure to use a wet rag to remove all valve cores before brazing field piping.
2. Do not cap or otherwise obstruct the liquid line temperature relief.
3. A
7
/
8
in. (22.4 mm) diameter hole is provided for locating field power wiring.
Actual hole size required depends on field wire sizing.
4. A 0.437 in. (11.1 mm) diameter hole is used for mounting unit.
5. Unit must have clearances as follows:
Top - Do not restrict.
Coil, Panel and Rear Side - 72 in. (1829) from solid surface.
6. Unit height dimension for standard and low sound unit with stack fan option.
7. Installation in a pit is not recommended.
8. Unit can be handled using crane. Refer to service installation instructions.
9. Dimensions shown in inches (mm).
10. Size 080 units have 5 condenser fans. Sizes 090 and 100 units have 6 con-
denser fans.
11. Weight does not include unit refrigerant charge.
a38-7104
14
–
Selection procedure
To select a 38AP stand-alone condensing unit:
Use Carrier's Commercial Split Builder program to select a
stand-alone outdoor unit from the Installation Configuration drop down menu and input the job requirements.
From the list presented, select a 38AP condensing
unit that is estimated to meet capacity requirements.
The 38APS single-circuit unit is offered in sizes 025-050
and the 38APD dual-circuit unit is offered in sizes 025-
100. After a 38AP unit is selected, the program will calculate the condensing unit performance.
To select 38AP systems:
For systems with one 40RU fan coil unit or
39 Series air handler — Use Carrier's Commercial
Split Builder program to select a combined 38AP outdoor
unit with matched 40RU indoor unit for sizes 025-030.
The AHUBuilder
38AP outdoor units with a matching 39 Series air handler
with direct-expansion (DX) coils. The 38APS single-circuit
unit is offered in sizes 025-050 and 38APD dual-circuit
unit is offered in sizes 025-100. Enter the software program and input the job requirements. From the list presented, select a 38AP condensing unit that is estimated to meet
capacity requirements. After selecting a 38AP unit, check
®
selection program is available to select
its performance with one or several DX coils. From the DX
coil list presented on the screen, match the 38AP with any
coil or all coils. The program calculates the combined performance of the condensing unit and each DX coil and
presents the resulting system capacities and operating temperatures. Matching thermostatic expansion valves and
nozzles for the DX coils are automatically selected and
displayed.
For systems with two air handlers — Use Carrier's
AHUBuilder
100 38AP outdoor unit to match with two 39 Series air
handlers with DX coils. For the first air handler, enter the
AHUBuilder selection program and input the job require-
ments. To choose a condensing unit, select the Specify
Your Own option. The program asks for condensing unit
capacities at 30 F ( 1.1 C) and 50 F (10 C) SST. See the
Condensing Unit Circuit Ratings tables on pages 20-29,
34-43, 48-57, and 62-71, and enter the capacities from
condenser circuit A or B (remember to use the correct air
temperature entering condenser column when locating the
circuit capacities). For the second air handler, repeat the
procedure to select the second DX coil for the condenser
circuit (A or B) not used in the first selection.
®
selection program to select one size 025-
15
Performance data
38APD,APS025 CONDENSING UNIT RATINGS, 60 Hz ENGLISH