Product 38AH024-134 Data Condensing UnitsThe 38AH units offer high unit EERs (Energy Efficiency...

Copyright 2009 Carrier Corporation Form 38AH-11PD

These dependable split systems match Carrier’s 40RM or 39 Series indoor-air handlers with the versatile outdoor 38AH condensing units for a wide selection of commercial cooling solutions.• Up to 4 compressors and 2

independent refrigerant circuits• Condensing unit can supply one or

2 air handlers• EERs up to 10.9• Variable air volume units operate as

low as 8% of nominal capacity without the use of hot gas bypass

• Constant volume units operate as low as 16% of nominal capacity (standard) or 8% of nominal capacity (with accessory unloader)

• Weatherized steel cabinet• Protection against high discharge

and low suction refrigerant pressure, and low oil pressure

• Crankcase heaters

Features/BenefitsThe 38AH condensing unit offers the utmost in system configuration and control adaptability. Its premium-quality standard components ensure durable, efficient, and reliable operation.The 38AH units offer high unit EERs (Energy Efficiency Ratios). These units provide greater efficiency than similar units in the marketplace, which trans-lates into year-round operating savings. Latest safety standards for 38AH units are assured through UL and UL, Cana-da, approvals.

38AH024-134Commercial Air-Cooled

Condensing Units50/60 Hz

20 to 130 Nominal Tons(63 to 390 Nominal kW)

ProductData

a38-4143ef

38AH044-134

38AH024-034

2

VersatilityThe 38AH Series condensing units feature up to 4 compressors and 2 re-frigerant circuits, and can be matched with a wide variety of air-handling units. All condensing unit circuits can supply a single air handler or 2 sepa-rate air handlers.

Standard units have constant volume control. A variable air volume (VAV) option is available. The VAV units have electric unloaders on the compressors to closely match building loads. The VAV option requires only a simple con-nection to a discharge air controller, thereby saving installation time and cost.

Durable constructionAll 38AH units have weatherizedcabinets constructed of heavy-dutygalvanized steel prepainted withcorrosion-resistant baked enamel. In-side and outside surfaces are protected to ensure long life and good looks. 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.

The unit’s coils have aluminum fins mechanically bonded to copper tubes for long-term reliability and improved heat transfer. Copper fins on copper tubes are available for harshindustrial or coastal conditions. Aninert epoxy barrier is available to pro-vide improved durability in corrosive coastal environments.

ReliabilityThe 38AH condensing units feature time-proven, highly reliable 06D and 06E semi-hermetic compressors. Un-loading capability is a standard feature on each circuit’s lead compressor. Each compressor has vibration isola-tors to provide quiet operation andreduced component stress.

The 38AH units have 2 independent circuits; they provide inherent backup capability. Each circuit is also protected by the following safety features:• Time Guard anti-short-cycling

device• Low oil pressure safety switch• Low refrigerant pressure switch

(suction)• High refrigerant pressure switch

(discharge)• Calibrated circuit breakers for

compressors and outdoor fans

Easier installation and serviceThe 38AH units are equipped with hinged control-box access doors, con-trol interface terminal boards, liquid line shutoff valves, and service valves on the compressors.

Larger 38AH124 and 134 size units are shipped as 2 modules for easier handling and rigging.

Table of contentsPage

Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1,2Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-16Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17-19Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-27Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28,29Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30-92Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93-97Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98-102Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103-106Typical Control Wiring Schematics. . . . . . . . . . . . . . . . . . . . . . . . . . .107-115Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116-128Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129-131

Features/Benefits (cont)

3

Model number nomenclature

*

LEGEND

*Packaging options 2 and 4 are not available on 38AH024-034 units.

Al — AluminumCu — CopperNFD — Non-Fused DisconnectVAV — Variable Air Volume

Certified to ISO 9001:2000

Quality Assurance

a38-7054

4

38AH024-034 CAPACITY RATINGS — 60 Hz

LEGEND *Condensing unit only ratings are at 45 F SST and 95 F entering-airtemperature.

NOTES:1. Unit performance is rated in accordance with AHRI Standard 365.2. System performance is rated in accordance with AHRI Standard

340/360.

38AH024-034 CAPACITY RATINGS — 50 Hz

LEGEND

*System gross capacities are rated according to indoor unit airflow,35 C air temperature entering condenser, and 20 C wb air temperatureentering evaporator.

†System gross capacities are rated according to indoor unit airflow,95 F air temperature entering condenser, and 67 F wb air temperatureentering evaporator.**Condensing unit gross capacity based on 36 C air temperature enter-

ing condenser and 8 C SST.††Condensing unit gross capacity based on 95 F air temperature enter-

ing condenser and 45 F SST.NOTES:1. Unit performance is rated in accordance with AHRI Standard 365.2. System performance is rated in accordance with AHRI Standard

340/360.

38AH044-134 CAPACITY RATINGS

LEGEND NOTES:1. Ratings are based on 45 F (7.2 C) suction temperature and 95 F

(35 C) outside-air temperature, and include suction line losses.2. Units are rated in accordance with AHRI standard 365.

38AH CONDENSINGUNIT

40RM AIR HANDLER/INDOOR COIL

SYSTEM CONDENSING UNIT ONLY*Net Capacity

(Btuh) EER IPLVNet Capacity

(Btuh) EER IPLV

024016H 222,000 9.8 9.4

251,000 11.7 13.7024H 240,000 9.6 9.7028H 250,000 10.2 10.3

028024H 268,000 9.4 9.5

290,000 11.2 12.9028H 282,000 9.6 9.5034H 290,000 9.4 9.3

034 028H 324,000 9.4 9.2 344,000 11.1 12.9034H 332,000 9.5 8.9

AHRI — Air Conditioning, Heating, and Refrigeration InstituteEER — Energy Efficiency RatioIPLV — Integrated Part Load ValueSST — Saturated Suction Temperature

38AHCONDENSING

UNIT

40RMAIR-HANDLING

UNIT

AIR-HANDLING UNIT AIRFLOW

SYSTEM GROSS CAPACITY

(Standard 3-Row Coil)

SYSTEM GROSS CAPACITY(High-Capacity 4-Row Coil)

CONDENSING UNIT ONLYGROSS CAPACITY

L/s Cfm kW* Btuh† kW* Btuh† kW** Btuh†† EER IPLV

024

016 2800 6,000 57.3 195,000 60.2 205,300

63.0 216,000 11.8 13.1024 3800 8,000 62.5 214,000 64.7 220,600028 4700 10,000 66.3 227,000 68.6 234,000

028024 3800 8,000 68.9 236,000 72.1 246,100

73.0 250,000 11.6 12.4028 4700 10,000 73.5 251,000 76.7 261,600034 5650 12,000 77.6 265,000 80.5 274,500

034028 4700 10,000 82.6 283,000 86.0 293,600

87.0 297,000 11.6 13.4034 5650 12,000 87.7 300,000 90.9 310,000

AHRI — Air Conditioning, Heating, and Refrigeration InstituteEER — Energy Efficiency RatioIPLV — Integrated Part Load Valuewb — Wet BulbSST — Saturated Suction Temperature

UNIT SIZE38AH

CAPACITYNOMINAL TONS

(60 Hz)

CAPACITYNOMINAL TONS

(50 Hz)EER (60 Hz) EER (50 Hz) IPLV (60 Hz) IPLV (50 Hz)

044 40 35 10.7 10.8 13.0 13.4054 50 41 10.5 10.7 13.0 13.2064 60 50 10.5 10.8 13.3 13.9074 70 61 10.1 10.3 12.6 12.8084 80 69 10.1 10.6 12.5 12.6094 90 78 10.2 10.6 13.4 14.0104 100 87 10.4 10.9 13.8 14.3124 120 100 10.5 10.8 13.6 14.0134 130 111 10.2 10.6 12.5 12.9

AHRI— Air Conditioning, Heating, and Refrigeration InstituteEER — Energy Efficiency RatioIPLV — Integrated Part Load Value

Capacity ratings

910

5

38AH024-134 UNITS, 60 Hz ENGLISH

LEGEND

*Typical operating charge with 25 ft of interconnecting piping. Operat-ing charge is approximate for maximum system capacity. Unit is fac-tory supplied with nitrogen holding charge.

†Circuit A compressor is lead.**Standard unit — single suction pressure-actuated unloader on com-

pressor no. 1.††VAV factory-installed option — two electrically actuated unloaders on

compressor no. 1.***Condenser 80% full of liquid R-22 at 120 F.

NOTES:1. Certified dimensional drawings available on request.2. Refer to Unloading Sequences tables, pages 119-121 for addi-

tional capacity step data.

UNIT 38AH024 028 034

Ckt 1 Ckt 2 Ckt 1 Ckt 2 Ckt 1 Ckt 2NOMINAL CAPACITY (tons) 20 25 30OPERATING WEIGHT (lb)

Cu-Al Coil (standard) 1760 1820 1880Cu-Cu Coil (optional) 1923 1982 2097

REFRIGERANT, TYPE* R-22Operating Charge, Typical (lb) 20 20 20 20 25 25

COMPRESSOR Reciprocating Semi-Hermetic (Qty) Model (1) 06DH824 (1) 06DA824 (1) 06DH328 (1) 06DA328 (1) 06DH328 (1) 06DA537No. Cylinders (per circuit)† 6 6 6 6 6 6Speed (rpm) 1750 1750 1750 1750 1750 1750Oil Charge Per Circuit (pt) 10Capacity Control Steps (%) 67**,33†† — 67**,33†† — 67**,33†† —Unloader Setting (psig) Factory Installed

Load 76 — 76 — 76 —Unload 58 — 58 — 58 —

CONDENSER FANS Propeller Type — Direct Driven(Qty) Dia (in.) (2) 30Nominal Hp 1.0 1.0 1.0Airflow (cfm) 16,700 16,700 16,700

Speed (rpm) 1140Total Power (kW) 1.55

CONDENSER COIL Enhanced Copper Tubes, Lanced Aluminum Fins Rows...Fins/in. 2...19 2...19 3...17Face Area (sq ft) 39.20 39.20 39.20Storage Cap. (lb)*** 37.7 37.7 56.6

CONTROLSPressurestat (psig)High Pressure

Open 426 ± 7Close 320 ± 20

Low PressureOpen 27 ± 3Close 44 ± 5

Oil Pressure Manual ResetOpen 6.0Close 8.8

FAN CYCLING CONTROLSNo. 2 Fan:

Temp Close (F) 70 ± 3Temp Open (F) 60 ± 3

PRESSURE RELIEFLocation Liquid Line, Suction Line, CompressorTemperature (F) 210

CONNECTIONS (in. ODM)Suction — in. OD 13/8Liquid — in. OD 5/8Hot Gas Bypass — in. OD 5/8

Cu-Al — Copper Tubes with Aluminum FinsCu-Cu — Copper Tubes with Copper Fins (Optional)ODF — Outside Diameter, FemaleODM — Outside Diameter, MaleVAV — Variable Air Volume

Physical data

6

38AH024-134 UNITS, 60 Hz ENGLISH (cont)

LEGEND

*Unit is factory supplied with nitrogen holding charge.†Circuit A compressor is lead.**Unloading steps available only on units ordered with the VAV factory-

installed option or on constant-volume units with additional field-installed accessory unloader.

††Circuit A compressor is lead on standard units; circuit B compressoris lead on optional single-circuit units.

***On all 044-134 units, fans no. 3 and 4; also on 38AH074, 084 (dual-circuit units only) and 38AH094, 104, fans no. 5 and 6.

†††For optional single-circuit units, suction ODF is 25/8 in. and liquidODF is 11/8 inches. Single circuit units have a single suction lineand single liquid line. No field modification is required.

NOTES:1. Certified dimensional drawings available on request.2. Refer to Unloading Sequences tables, pages 119-121, for addi-

tional system capacity step data.

UNIT 38AH 044 054 064 074 084NOMINAL CAPACITY (tons) 40 50 60 70 80OPERATING WEIGHT WITH REFRIGERANT (lb) (approx)

Cu-Al Coil (standard) 3259 3309 3565 3812 4057Cu-Cu Coil (optional) 3547 3597 3998 4229 4730

SHIPPING WEIGHT WITHCOIL PROTECTION ONLY (lb) (approx)Cu-Al Coil (standard) 3250 3290 3530 3780 4000Cu-Cu Coil (optional) 3538 3578 3963 4197 4678

REFRIGERANT, TYPE* R-22Operating Charge, Typical (lb) 62 72 88 104 130

DUAL-CKT UNITCOMPRESSOR Type...Rpm Reciprocating Semi-Hermetic...1750(Quantity) Cylinder Ckt† (4) A (4) B (4) A (6) B (6) A (6) B (6) A (6) B (6) A (6) BModel No. 06E –250 –250 –250 –265 –265 –275 –275 –299 –299 –299Oil Charge (pt) 17 17 17 21 21 21 21 19 19 19Capacity Control Steps (%) 100 100 100 100 100

75 79 84 86 8350 58** 69** 71** 67**25 42 48 43 50

21 32 29 3316** 14** 17**

OPTIONAL SINGLE-CKT UNITCOMPRESSOR Type...Rpm Reciprocating Semi-Hermetic...1750(Quantity) Cylinder Ckt†† (4) A1 (4) A2 (6) A1 (4) A2 (6) A1 (6) A2 (6) A1 (6) A2 (6) A1 (6) A2Model No. 06E –250 –250 –265 –250 –275 –265 –299 –275 –299 –299Oil Charge (pt) 17 17 21 17 21 21 19 21 19 19Capacity Control Steps (%) 100 100 100 100 100

75 80 82 81 8350 61** 64** 62** 67**25 56 55 57 50

37 36 38 3318** 19** 17**

CONDENSER FANS (4 Blade)(Quantity) Dia (in.) (4) 30 (6) 30Nominal Hp 1.0 1.0Airflow (cfm) 35,000 52,000 51,000Speed (rpm) 1140 1140Total Power (kW) 6.2 9.3

CONDENSER COIL Enhanced Copper Tubes, Lanced Aluminum FinsRows...Fins per in. 2...17 2...17 3...17 2...19 3...17Face Area (sq ft) 80.5 80.5 80.5 116.7 116.7Storage Capacity (lb per circuit) at 120 F 35 35 35 35 55 55 55 55 80 80

FAN CYCLING CONTROLS***Close (psig) 255 ± 10Open (psig) 160 ± 10

CONNECTIONSSuction, ODF (in.)††† 21/8Liquid, ODF (in.)††† 7/8Hot Gas Bypass, ODF (in.) 5/8


Physical data (cont)

7


LEGEND

*Includes piping and trim kit.†Unit is factory supplied with nitrogen holding charge.**Compressors are shipped with minimum oil charge.

††Capacity control steps listed are for constant volume units with noaccessories. Refer to Unloading Sequence tables, pages 119-121,for additional system capacity information.


NOTES:1. Unit 38AH124 consists of one 124A module and one 124B mod-

ule. Unit 38AH134 consists of one 134A module and one 134Bmodule.

2. Certified dimensional drawings available on request.3. Lead and lag circuits and compressors are as follows:

†††Circuit has only one compressor.

UNIT 38AH 094 104124 134

124A 124B 134A 134BNOMINAL CAPACITY (tons) 90 100 60 60 60 70OPERATING WEIGHT WITH

REFRIGERANT (lb) (approx)Cu-Al Coil (standard) 5088 5435 3630* 3630* 3630* 3877*Cu-Cu Coil (optional) 5813 6160 4063* 4063* 4063* 4294*

SHIPPING WEIGHT WITHCOIL PROTECTION AND SKID (lb) (approx)Cu-Al Coil (standard) 5630 5990 3907* 3907* 3907* 4080*Cu-Cu Coil (optional) 6355 6715 4340* 4340* 4340* 4497*

REFRIGERANT, TYPE† R-22Operating Charge,Typical (lb) 148 135 88 88 88 104

Qty of Circuits 2 2 1 1 1 1COMPRESSOR Type...Rpm

(Quantity Cylinder) Reciprocating Semi-Hermetic...1750Compressor** (6)A1 (4)A2 (6)B1 (6)A1 (4)A2 (6)B1 (6)B2 (6)A1 (6)A2 (6)A1 (6)A2 (6)A1 (6)A2 (6)A1 (6)A2Model No. 06E –275 –250 –299 –265 –250 –265 –265 –275 –265 –275 –265 –275 –265 –299 –275Oil Charge (pt) 21 17 19 21 17 21 21 21 21 21 21 21 21 19 21Circuit Capacity — %

(approx) 55 45 47 53 50 50 45 55

Capacity Control Steps†† 6 8 4 4 4 4CONDENSER FANS(6 Blade)

(Quantity) Dia (in.) (6) 30 (6) 30 (4) 30 (4) 30 (4) 30 (6) 30Nominal Hp 1.0 1.0 1.0 1.0 1.0 1.0Airflow (cfm) 52,000 52,000 35,000 35,000 35,000 52,000Speed (rpm) 1140 1140 1140 1140 1140 1140Total Power (kW) 9.4 9.5 6.4 6.4 6.4 9.2

CONDENSER COIL Enhanced Copper Tubes, Lanced Aluminum FinsRows...Fins per in. 3...17 3...17 3...17 3...17 3...17 2...19Face Area (sq ft) 128.3 128.3 80.5 80.5 80.5 116.7Storage Capacity(lb per ckt) at 120 F 89 89 110 110 110 110

FAN CYCLING CONTROLS***Close (psig) 255 ± 10Open (psig) 160 ± 10

CONNECTIONSSuction, ODF (in.) 21/8 21/8 25/8 25/8 25/8 25/8Liquid, ODF (in.) 7/8 7/8 11/8 11/8 11/8 11/8Hot Gas Bypass,ODF (in.)

5/8 5/8 5/8 5/8 5/8 5/8


UNIT 38AH 094 104 124 134LEAD CIRCUIT A A Module 124A Module 134A

Compressor, Lead A1 A1 A1 A1Compressor, Lag A2 A2 A2 A2

LAG CIRCUIT B B Module 124B Module 134BCompressor, Lead B1 B1 A1 A1Compressor, Lag ††† B2 A2 A2

8

38AH024-134 UNITS, 60 Hz SI

LEGEND

*Typical operating charge with 7.6 m of interconnecting piping. Oper-ating charge is approximate for maximum system capacity. Unit isfactory supplied with nitrogen holding charge.

†Circuit A compressor is lead.**Standard unit - single suction pressure actuated unloader on com-

pressor no. 1.††VAV factory-installed option - two electronically actuated unloaders

on compressor no. 1.***Condenser 80% full of liquid R-22 at 49 C.


tional system capacity step data.3. Equivalent connection values in mm are as follows:

UNIT 38AH024 028 034

Ckt 1 Ckt 2 Ckt 1 Ckt 2 Ckt 1 Ckt 2NOMINAL CAPACITY (kW) 70 88 106OPERATING WEIGHT (kg) (approx)

Cu-Al Coil (standard) 798 826 853Cu-Cu Coil (optional) 872 899 951

REFRIGERANT, TYPE* R-22Operating Charge, Typical (kg) 18 18 23

DUAL-CKT UNITCompressor Type...r/s Reciprocating Semi-Hermetic

(Quantity) Cylinder Ckt† (6) A (6) B (6) A (6) B (6) A (6) BModel No. 06D H824 A824 H328 A328 H328 A537Oil Charge (L) 4.7Capacity Control Steps (%) 100

67**33††

CONDENSER FANS Propeller Type — Direct Driven(Qty) Dia (mm) (2) 762Nominal kW .746Airflow (L/s) 7882

Speed (r/s) 19Total Power (kW) 1.55

CONDENSER COIL Enhanced Copper Tubes, Lanced Aluminum Fins Rows...Fins per m 2...748 2...748 3...669Face Area (sq m) 3.6 3.6 3.6Storage Cap. (kg)*** 17 17 26

FAN CYCLING CONTROLSClose (C) 21 ± 2Open (C) 16 ± 2

CONNECTIONSSuction — in. ODF† 21/8Liquid — in. ODF† 7/8Hot Gas Bypass — ODF (in.) 5/8

Cu-Al — Copper Tubes with Aluminum FinsCu-Cu — Copper Tubes with Copper Fins (Optional)ODF — Outside Diameter, FemaleODM — Outside Diameter, MaleVAV — Variable Air Volume in. mm

5/8 15.97/8 22.2

11/8 28.621/8 54.025/8 66.7


9

38AH024-134 UNITS, 60 Hz SI (cont)

LEGEND

*Unit is factory supplied with nitrogen holding charge.†Circuit A compressor is lead.**Unloading steps available only on units ordered with the VAV factory-

installed option or on constant-volume units with additional field-installed accessory unloader.

††Circuit A compressor is lead on standard units; circuit B compressoris lead on optional single-circuit units.


†††For optional single-circuit units, suction ODF is 25/8 in. and liquidODF is 11/8 inches. Single circuit units have a single suction line andsingle liquid line. No field modification is required.


tional system capacity step data.3. Equivalent connection values in mm are as follows:

UNIT 38AH 044 054 064 074 084NOMINAL CAPACITY (kW) 140 175 210 245 280OPERATING WEIGHT WITH

REFRIGERANT (kg) (approx)Cu-Al Coil (standard) 1480 1501 1617 1729 1840Cu-Cu Coil (optional) 1609 1632 1813 1918 2145

SHIPPING WEIGHT WITH COIL PROTECTION ONLY (kg) (approx)

Cu-Al Coil (standard) 1474 1492 1600 1714 1814Cu-Cu Coil (optional) 1605 1623 1797 1903 2122

REFRIGERANT, TYPE* R-22Operating Charge, Typical (kg) 28 33 40 47 59

DUAL-CKT UNITCompressor Type...r/s Reciprocating Semi-Hermetic...29.2(Quantity) Cylinder Ckt† (4) A (4) B (4) A (6) B (6) A (6) B (6) A (6) B (6) A (6) BModel No. 06E –250 –250 –250 –265 –265 –275 –275 –299 –299 –299Oil Charge (L) 8 8 8 10 10 10 10 9 9 9Capacity Control Steps (%) 100 100 100 100 100

75 79 84 86 8350 58** 69** 71** 67**25 42 48 43 50

21 32 29 3316** 14** 17**

OPTIONAL SINGLE-CKT UNITCOMPRESSOR Type...r/s Reciprocating Semi-Hermetic...29.2(Quantity) Cylinder Ckt†† (4) A1 (4) A2 (6) A1 (4) A2 (6) A1 (6) A2 (6) A1 (6) A2 (6) A1 (6) A2Model No. 06E –250 –250 –265 –250 –275 –265 –299 –275 –299 –299Oil Charge (L) 8 8 8 10 10 10 10 9 9 9Capacity Control Steps (%) 100 100 100 100 100

75 80 82 81 8350 61** 64** 62** 67**25 56 55 57 50

37 36 38 3318** 19** 17**

CONDENSER FANS (4 Blade)(Quantity) Dia (mm) (4) 762 (6) 762Nominal kW .746 .746Airflow (l/s) 16520 24544 20472Speed (r/s) 19 19Total Power (kW) 6.2 9.3

CONDENSER COIL Enhanced Copper Tubes, Lanced Aluminum FinsRows...Fins per m. 2...669 2...669 3...669 2...782 3...669Face Area (sq m) 7.5 7.5 7.5 10.8 10.8Storage Capacity (kg per circuit) at 49 C 16 16 16 16 25 25 25 25 36 36

FAN CYCLING CONTROLS***Close (kPa) 1768 + 69Open (kPa) 1103 ± 69

CONNECTIONSSuction, ODF (in.)††† 21/8Liquid, ODF (in.)††† 7/8Hot Gas Bypass, ODF (in.) 5/8


in. mm5/8 15.97/8 22.2

11/8 28.621/8 54.025/8 66.7

10


LEGEND

*Includes piping and trim kit.†Unit is factory supplied with nitrogen holding charge.**Compressors are shipped with minimum oil charge.

††Capacity control steps listed are for constant volume units with noaccessories. Refer to Unloading Sequence table, pages 119-121, foradditional system capacity information.




2. Certified dimensional drawings available on request.

3. Lead and lag circuits and compressors are as follows:

†††Circuit has only one compressor.4. Equivalent connection values in mm are as follows:

UNIT 38AH 094 104124 134

124A 124B 134A 134BNOMINAL CAPACITY (kW) 316 350 210 210 210 245OPERATING WEIGHT WITH

REFRIGERANT (approx) (kg)Cu-Al Coil (standard) 2308 2465 1647* 1647* 1647* 1759*Cu-Cu Coil (optional) 2637 2794 1843* 1843* 1843* 1843*

SHIPPING WEIGHT WITHCOIL PROTECTION AND SKID (approx) (kg)Cu-Al Coil (standard) 2554 1717 1860* 1860* 1860* 1860*Cu-Cu Coil (optional) 2883 3046 1928* 1968* 1968* 2040*

REFRIGERANT, TYPE† R-22Operating Charge,Typical (kg) 67 61 40 40 40 47

Qty of Circuits 2 2 1 1 1 1COMPRESSOR Type, r/s(Quantity Cylinder) Reciprocating Semi-Hermetic...29.2

Compressor** (6)A1 (4)A2 (6)B1 (6)A1 (4)A2 (6)B1 (6)B2 (6)A1 (6)A2 (6)A1 (6)A2 (6)A1 (6)A2 (6)A1Model No. 06E –275 –250 –299 –265 –250 –265 –265 –275 –265 –275 –265 –275 –265 –299Oil Charge (L) 10 8 9 10 8 10 10 10 10 10 10 10 9 10Circuit Capacity — % (approx) 55 45 47 53 50 50 45 55

Capacity Control Steps†† 6 8 4 4 4 4CONDENSER FANS (6 Blade)

(Qty) Dia (mm) (6) 762 (6) 762 (4) 762 (4) 762 (4) 762 (6) 762Nominal kW .746 .746 .746 .746 .746 .746Airflow (l/s) 24,544 24,544 46,250 16,250 16,254 24.544Speed (r/s) 19 19 19 19 19 19Total Power (kW) 9.4 9.5 6.4 6.4 6.4 9.2

CONDENSER COIL Enhanced Copper Tubes, Lanced Aluminum FinsRows...Fins per m 3...669 3...669 3...669 3...669 3...669 2...78219Face Area (sq m) 1139 139 7.5 7.5 7.5 10.8Storage Capacity(kg per ckt) at 120 F 40 40 50 50 50 50

FAN CYCLING CONTROLS***Close (kPa) 1958 ± 69Open (kPa) 1103 ± 69

CONNECTIONSSuction, ODF (in.) 21/8 21/8 25/8 25/8 25/8 25/8Liquid, ODF (in.) 7/8 7/8 11/8 11/8 11/8 11/8Hot Gas Bypass, ODF (in.) 5/8 5/8 5/8 5/8 5/8 5/8





in. mm5/8 15.97/8 22.2

11/8 28.621/8 54.025/8 66.7


11

38AH024-134 UNITS, 50 Hz ENGLISH

LEGEND *Typical operating charge with 25 ft of interconnecting piping. Operat-ing charge is approximate for maximum system capacity. Unit is fac-tory supplied with nitrogen holding charge.

†Standard unit — single pressure-actuated suction unloader on com-pressor no. 1.

**VAV FIOP — double electrically actuated unloaders on compressorno. 1.

††Storage capacity of condenser coil with coil 80% full of liquid R-22 at120 F.

UNIT 38AH 024 028 034Circuit 1 Circuit 2 Circuit 1 Circuit 2 Circuit 1 Circuit 2

NOMINAL CAPACITY (Tons) 18 21 25OPERATING WEIGHT (lb)

Cu-Al (Standard) 1760 1820 1880Cu-Cu (Optional) 1923 1982 2097

REFRIGERANT* R-22Operating Charge, Typical (lb) 20 20 20 20 25 25

COMPRESSOR Reciprocating Semi-HermeticQty...Model 1...06DH824 1...06DA824 1...06DH328 1...06DA328 1...06DH328 1...06DA537No. Cylinders 6 6 6 6 6 6Speed (rpm) 1450 1450 1450 1450 1450 1450Oil Charge per Circuit (Pt) 10

Capacity Steps (%)(FIOP or Acy) 100 100 100 100 100 100Standard Unit 67* — 67† — 67* —VAV FIOP 33† — 33** — 33† —

Unloader Setting (psig) Factory InstalledLoad 76 — 76 — 76 —Unload 58 — 58 — 58 —

CONDENSER FANS Propeller Type — Direct DrivenQty...Speed (rpm) 2...950Diameter (in.) 30 30 30Nominal Hp 1.0 1.0 1.0Nominal Airflow (cfm) 16,700 16,700 15,700Watts (total) 3100

CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced FinRows...Fins/in. 2...19 2...19 3...17Face Area (sq ft) 39.20 39.20 39.20Storage Capacity (lb)†† 37.7 37.7 56.6

CONTROLSPressurestat (psig)High Pressure

Cutout 426 7Cut-in 320 20

Low PressureCutout 27 3Cut-in 44 5

Oil Pressure Manual ResetCutout 6.0Cut-in 8.8

FAN CYCLING CONTROLSTemperature (F)

No. 2 Fan, Close 70 3Open 60 3

PRESSURE RELIEF Fusible PlugLocation Liquid Line, Suction Line, CompressorTemperature (F) 210

CONNECTIONS (in. ODM)Suction 13/8Liquid 5/8

Cu-Al — Copper Tubes with Aluminum FinsCu-Cu— Copper Tubes with Copper Fins (Optional)FIOP — Factory-Installed OptionODF — Outside Diameter, FemaleODM — Outside Diameter, MaleVAV — Variable Air Volume

12


LEGEND

*Unit is factory supplied with nitrogen holding charge.†06E250 compressors have 4 cylinders; all others have 6.**Circuit A compressor is lead on standard units; circuit B compressor

is lead on optional single-circuit units.††Capacity control steps listed are for constant volume units with no

accessories. Refer to Minimum Outdoor-Air Operating Temperatureand Unloading Sequences tables, pages 119-121, for additionalsystem capacity information.

***On all 044-134 units, fan no. 3 and 4; also on 38AH074,084 (dual-circuit units only) and 38AH094,104, fans no. 5 and 6.

†††For single-circuit units, suction ODF is 25/8 in. and liquid ODF is11/8 inches. Single circuit units have a single suction line and singleliquid line. No field modification is required.

NOTE: Certified dimensional drawings available on request.

UNIT 38AH 044 054 064 074 084NOMINAL CAPACITY (Tons) 35 41 50 61 69OPERATING WEIGHT WITH Cu-Al Coils 3259 3309 3565 3812 4057

REFRIGERANT (lb) (Approx.) Cu-Cu Coils 3547 3597 3998 4229 4730SHIPPING WEIGHT WITH Cu-Al Coils 3250 3290 3530 3780 4000

COIL PROTECTION ONLY (lb) (Approx.) Cu-Cu Coils 3538 3578 3963 4197 4678TYPICAL OPERATING REFRIGERANT

CHARGE (lb, approx.) R-22* 62 72 88 104 130COMPRESSOR Type...Rpm Reciprocating Semi-Hermetic...1460

(Qty Cylinder)† Circuit** (4) A (4) B (4) A (6) B (6) A (6) B (6) A (6) B (6) A (6) BModel No. 06E- 250 250 250 265 265 275 275 299 299 299Oil Charge (pt) 17 17 17 21 21 21 21 19 19 19Capacity Control Steps†† 4

CONDENSER FANS (4 Blade)Qty...Dia (in.) 4...30 6...30Airflow (cfm) 35,000

95052,000 51,000

Speed (rpm) 950Total Power (kW) 6.2 9.3

CONDENSER COIL Enhanced Copper Tubes, Lanced Aluminum FinsRow...Fins per in. 2...17 2...17 3...17 2...19 3...17Face Area (ft2) 80.5 80.5 80.5 116.7 116.7Storage Capacity (lb per circuit, approx.) at 120 F 35 35 55 55 80

FAN CYCLING CONTROLS ***Close (psig) 255 ± 10Open (psig) 160 ± 10

CONNECTIONSSuction, ODF (in.)††† 21/8 21/8Liquid, ODF (in.)††† 5/8

5/8 7/8 7/8Ckt A Ckt BHot Gas Bypass, ODF (in.) 5/8 5/8

Cu-Al — Copper Tubes with Aluminum FinsCu-Cu— Copper Tubes with Copper Fins (Optional)ODF — Outside Diameter, FemaleODM — Outside Diameter, MaleVAV — Variable Air Volume


13


LEGEND

*Includes piping and trim kit.†Unit is factory supplied with nitrogen holding charge.**Compressor A1 is lead compressor on all circuits except circuit B on

units 38AH094 and 104. Compressor B1 is lead on circuit B on units38AH094 and 104. Compressors are shipped with minimum oilcharge.

††Capacity control steps listed are for constant volume units with noaccessories. Refer to Minimum Outdoor-Air Operating Temperatureand Unloading Sequences tables, pages 119-121, for additional sys-tem capacity information.





†††Circuit only has one compressor.

UNIT 38AH 094 104124 134

124A 124B 134A 134BNOMINAL CAPACITY (Tons) 78 87 50 50 50 61OPERATING WEIGHT WITH

REFRIGERANT (Approx.) (lb)Cu-AlCu-Cu

50885813

54356160

3630*4063*

3630*4063*

3630*4063*

3877*4294*

SHIPPING WEIGHT WITHCOIL PROTECTION AND SKID(Approx.) (lb)

Cu-AlCu-Cu

56306355

59906715

3907*4340*

3907*4340*

3907*4340*

4080*4497*

TYPICAL OPERATING R-22REFRIGERANT†Charge (Approx.) (lb) 148 135 88 88 88 104Qty of Circuits 2 2 1 1 1 1

COMPRESSOR Type...Rpm Reciprocating Semi-Hermetic...1460(Qty Cylinder) Compressor** (6)A1 (4)A2 (6)B1 (6)A1 (4)A2 (6)B1 (6)B2 (6)A1 (6)A2 (6)A1 (6)A2 (6)A1 (6)A2 (6)A1 (6)A2Model No. 06E –275 –250 –299 –265 –250 –265 –265 –275 –265 –275 –265 –275 –265 –299 –275Oil Charge (pt) 21 17 19 21 17 21 21 21 21 21 21 21 21 19 21Circuit Capacity (%) (Approx.) 55 45 47 53 50 50 45 55Capacity Control Steps†† 6 8 4 4 4 4

CONDENSER FANS (4 Blade)Qty...Dia (in.) 6...30 6...30 4...30 4...30 4...30 6...30Airflow (cfm) 52,000 52,000 35,000 35,000 35,000 52,000Speed (rpm) 950 950 950 950 950 950Total Power (kW) 9.4 9.5 6.4 6.4 6.4 9.2

CONDENSER COIL Enhanced Copper Tubes, Lanced Aluminum FinsRows...Fins per in. 3...17 3...17 3...17 3...17 3...17 2...19Face Area (sq ft) 128.3 128.3 80.5 80.5 80.5 116.7Storage Capacity

(kg per circuit, approx.) 178 178 110 110 110 110at 120 F

FAN CYCLING CONTROLS***Close (psig) 255 10Open (psig) 160 10






14

38AH024-134 UNITS, 50 Hz SI

LEGEND *Typical operating charge with 7.6 m of interconnecting piping. Operat-ing charge is approximate for maximum system capacity. Unit is fac-tory supplied with nitrogen holding charge.

†Standard unit — single pressure-actuated suction unloader on com-pressor no. 1.

**VAV FIOP — double electrically actuated unloaders on compressorno. 1.

††Storage capacity of condenser coil with coil 80% full of liquid R-22 at48.8 C.

UNIT 38AH 024 028 034Circuit 1 Circuit 2 Circuit 1 Circuit 2 Circuit 1 Circuit 2

NOMINAL CAPACITY (kW) 63 73 87OPERATING WEIGHT (kg)

Cu-Al Coil (Standard) 798 826 853Cu-Cu Coil (Optional) 872 899 951

REFRIGERANT* R-22Operating Charge, Typical (kg) 9.10 9.10 9.10 9.10 11.40 11.40

COMPRESSOR Reciprocating Semi-HermeticQty...Model 1...06DH824 1...06DA824 1...06DH328 1...06DA328 1...06DH328 1...06DA537No. Cylinders 6 6 6 6 6 6Speed (r/s) 24.3 24.3 24.3 24.3 24.3 24.3Oil Charge per Circuit (L) 4.73

Capacity Steps (%)(FIOP or Acy) 100 100 100 100 100 100Standard 67* — 67† — 67* —VAV FIOP 33† — 33** — 33† —

Unloader Setting (kPa) Factory InstalledLoad 524 — 524 — 524 —Unload 400 — 400 — 400 —

CONDENSER FANS Propeller Type — Direct DrivenQty...Speed (r/s) 2...16Diameter (mm) 762 762 762Nominal Hp 1.0 1.0 1.0Nominal Airflow (L/s) 7870 7870 7400Watts (total) 3100

CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced FinRows...Fins/m 2...748 2...748 3...670Total Face Area (sq m) 3.64 3.64 3.64Storage Capacity (kg)†† 17.4 17.4 26.0

CONTROLSPressurestat (kPa)High Pressure

Cutout 2940 50Cut-in 2200 140

Low PressureCutout 185 20Cut-in 300 35

Oil Pressure Manual ResetCutout 42Cut-in 62

FAN CYCLING CONTROLSTemperature (C)

No. 2 Fan, Close 21.1 1.6Open 15.6 1.6

PRESSURE RELIEF Fusible PlugLocation Liquid Line, Suction Line, CompressorTemperature (C) 100

CONNECTIONS (in. ODM)Suction 13/8Liquid 5/8

Cu-Al — Copper Tubes with Aluminum FinsCu-Cu— Copper Tubes with Copper Fins (Optional)FIOP — Factory-Installed OptionODF — Outside Diameter, FemaleODM — Outside Diameter, MaleVAV — Variable Air Volume


15


LEGEND

* Unit is factory supplied with nitrogen holding charge.†06E250 compressors have 4 cylinders; all others have 6.**Circuit A compressor is lead on standard units; circuit B compressor

is lead on optional single-circuit units.††Capacity control steps listed are for constant volume units with no

accessories. Refer to Minimum Outdoor-Air Operating Temperatureand Unloading Sequences tables, pages 119-121, for additional sys-tem capacity information.


†††For single-circuit units, suction ODF is 25/8 in. and liquid ODF is11/8 inches. Single circiut units have a single suction line and singleliquid line. No field modification is required.

NOTES:1. Certified dimensional drawings available on request.2. Equivalent connection values in mm are as follows:

UNIT 38AH 044 054 064 074 084NOMINAL CAPACITY (kW) 123 144 175 214 242OPERATING WEIGHT WITH Cu-Al Coils 1480 1501 1617 1729 1840

REFRIGERANT (kg) (Approx.) Cu-Cu Coils 1609 1632 1813 1918 2145SHIPPING WEIGHT WITH Cu-Al Coils 1474 1492 1601 1715 1814

COIL PROTECTION ONLY (kg) (Approx.) Cu-Cu Coils 1605 1623 1798 1904 2122TYPICAL OPERATING REFRIGERANT

CHARGE (kg, approx.) R-22* 28.1 32.7 39.9 47.2 58.9COMPRESSOR Type...r/s Reciprocating Semi-Hermetic...24.3

(Qty Cylinder)† Circuit** (4) A (4) B (4) A (6) B (6) A (6) B (6) A (6) B (6) A (6) BModel No. 06E- 250 250 250 265 265 275 275 299 299 299Oil Charge (L) 8.0 8.0 8.0 9.9 9.9 9.9 9.9 9.0 9.0 9.0Capacity Control Steps†† 4

CONDENSER FANS (4 Blade)Qty...Dia (mm) 4...762 6...762Airflow (L/s) 16 500

15.824 500 24 100

Speed (r/s) 15.8Total Power (kW) 6.2 9.3

CONDENSER COIL Enhanced Copper Tubes, Lanced Aluminum FinsRow...Fins per m 2...669 2...669 3...669 2...782 3...669Face Area (m2) 7.48 7.48 7.48 10.84 10.84Storage Capacity (kg per circuit, approx.) at 48.9 C 16 16 25 25 36

FAN CYCLING CONTROLS ***Close (kPa) 1758 ± 69Open (kPa) 1103 ± 69

CONNECTIONSSuction, ODF (in.)††† 21/8 21/8Liquid, ODF (in.)††† 5/8

5/8 7/8 7/8Ckt A Ckt BHot Gas Bypass, ODF (in.) 5/8 5/8


in. mm5/8 15.97/8 22.2

11/8 28.621/8 54.025/8 66.7

16


LEGEND

*Includes piping and trim kit.†Unit is factory supplied with nitrogen holding charge.**Compressor A1 is lead compressor on all circuits except circuit B on

units 38AH094 and 104. Compressor B1 is lead on circuit B on units38AH094 and 104. Compressors are shipped with minimum oilcharge.

††Capacity control steps listed are for constant volume units with noaccessories. Refer to Minimum Outdoor-Air Operating Temperatureand Unloading Sequences tables, pages 119-121, for additional sys-tem capacity information.





†††Circuit has only one compressor.4. Equivalent connection values in mm are as follows:

UNIT 38AH 094 104124 134

124A 124B 134A 134BNOMINAL CAPACITY (kW) 274 305 175.5 175.5 175.5 214.5OPERATING WEIGHT WITH

REFRIGERANT (Approx.) (kg)Cu-AlCu-Cu

23082637

24652794

1647*1843*

1647*1843*

1647*1843*

1759*1843*

SHIPPING WEIGHT WITHCOIL PROTECTION AND SKID(Approx.) (kg)

Cu-AlCu-Cu

25542883

27173046

1860*1968*

1860*1968*

1860*1968*

1851*2040*

TYPICAL OPERATING R-22REFRIGERANT†Charge (Approx.) (kg) 67.1 61.2 40 40 40 47.2Qty of Circuits 2 2 1 1 1 1

COMPRESSOR Type...r/s Reciprocating Semi-Hermetic...24.3(Qty Cylinder) Compressor** (6)A1 (4)A2 (6)B1 (6)A1 (4)A2 (6)B1 (6)B2 (6)A1 (6)A2 (6)A1 (6)A2 (6)A1 (6)A2 (6)A1 (6)A2Model No. 06E –275 –250 –299 –265 –250 –265 –265 –275 –265 –275 –265 –275 –265 –299 –275Oil Charge (L) 10 8 9 10 8 10 10 10 10 10 10 10 10 9 10Circuit Capacity (%) (Approx.) 55 45 47 53 50 50 45 55Capacity Control Steps†† 6 8 4 4 4 4

CONDENSER FANS (4 Blade)Qty...Dia (mm) 6...762 6...762 4...762 4...762 4...762 6...762Airflow (L/s) 24 544 24 544 16 520 16 520 16 520 24 544Speed (R/s) 15.8 15.8 15.8 15.8 15.8 15.8Total Power (kW) 9.4 9.5 6.4 6.4 6.4 9.2

CONDENSER COIL Enhanced Copper Tubes, Lanced Aluminum FinsRows...Fins per m 3...669.3 3...669.3 3...669.3 3...669.3 3...669.3 2...781.6Face Area (sq m) 11.9 11.9 7.5 7.5 7.5 10.8Storage Capacity

(kg per circuit, approx.) 81 81 50 50 50 50at 40 C

FAN CYCLING CONTROLS***Close (kPa) 1758 69Open (kPa) 1103 69






in. mm5/8 15.97/8 22.2

11/8 28.621/8 54.025/8 66.7


17

LEGEND

*See the Unloader, Accumulator, and NFD Factory-Installed Option Availabilitytable for more detailed information.

Factory-installed optionsEnviro-Shield™ condenser options are available tomatch coil protection to site conditions for optimumdurability. See the Condenser Coil Options table onpage 19 and refer to the Application Data for selectionguidance. Consult your Carrier representative for furtherinformation.VAV (variable air volume) control box modifica-tion makes the condensing unit compatible with VAV con-troller. This option includes factory-installed accumulatorsand electric unloaders on the compressors as follows:

1 — 38AH0442 — 38AH024-034,054-084,1043 — 38AH0944 — 38AH124,134 (2 per module)

Standard dual circuit with NFD (sizes 044-104only) includes factory-installed non-fused disconnectswitch.Standard dual circuit with NFD and VAV (sizes044-104 only) includes factory-installed accumulators,wiring, electric unloaders, and non-fused disconnectswitch.Single-circuit (sizes 044-084 only) includes factory-installed accumulators and all piping and wiring requiredto make the unit single circuit.Single-circuit with VAV (sizes 044-084 only)includes piping, wiring, and electric unloaders on thecompressors (one on size 044 and 2 on sizes 054-084) tomake the unit single circuit, VAV-ready. This option alsoincludes factory-installed accumulators.

Single circuit with NFD (sizes 044-084 only)includes factory-installed single-circuit piping modification,accumulators, and non-fused disconnect switch.Single circuit with NFD and VAV (sizes 044-084only) includes factory-installed single-circuit piping modifi-cation, accumulators, wiring, electric unloaders, and non-fused disconnect switch.Standard dual module with VAV (sizes 124,134only) includes factory-installed accumulators, wiring andelectric unloaders.Standard dual module with NFD (sizes 124,134only) includes factory-installed single-circuit piping modifi-cation for each module (dual circuit unit), and non-fuseddisconnect switch.Standard dual module with NFD and VAV (sizes124,134 only) includes factory-installed single-circuitpiping modification for each module (dual circuit unit),accumulators, wiring, electric unloaders, and non-fused dis-connect switch.

Field-installed accessoriesMotormaster® V –20 F low-ambient controls con-trols outdoor-fan motor operation to maintain the correcthead pressure at low outdoor ambient temperatures. Onlyone low ambient temperature kit is required per unit.Gage panel package provides a panel-mounted suctionand a discharge pressure gage for the refrigerant circuit.Transformer relay package (sizes 044-134 only) fora remote-control (24-v) thermostat. One 2-stage thermo-stat is required for use with the relay package.

ITEM FACTORY-INSTALLED OPTION FIELD-INSTALLED ACCESSORYEnviro-Shield™ Condenser Options XVAV Control Box Modification* XStandard Dual Circuit with NFD (sizes 044-104 only)* XStandard Dual Circuit with NFD and VAV (sizes 044-104 only)* XSingle Circuit (sizes 044-084 only)* XSingle Circuit with VAV (sizes 044-084 only)* XSingle Circuit with NFD (sizes 044-084 only)* XSingle Circuit with NFD and VAV (sizes 044-084 only)* XStandard Dual Module with VAV (sizes 124,134 only)* XStandard Dual Module with NFD (sizes 124,134 only)* XStandard Dual Module with NFD and VAV (sizes 124,134 only)* X–20 F Low-Ambient Controls XGage Panel Package XTransformer Relay Package (sizes 044-134 only) XAdditional Electric Unloader Package XAdditional Pressure Unloader Package XHail Guard Package (sizes 044-134 only) XModuPanel™ Control XSound-Reduction Kit (sizes 044-134 only) XUnloader Conversion Kit XCompressor Grille Package (sizes 044-134 only) XCondenser Coil Grille Package (sizes 044-134 only) XAccumulator (sizes 024-084 only) XHot Gas Bypass Kit X

NFD — Non-Fused DisconnectVAV — Variable Air Volume

Options and accessories

18

Additional electric unloader package includes hard-ware and solenoid valve to convert a pressure-operatedunloader to electric unloading (coil not included).Additional pressure unloader package includes allunloader valves and hardware.Hail guard package (sizes 044-134 only) protectscoils against damage from hail and airborne debris.ModuPanel™ control provides 10-step microprocessor-based control for VAV applications. The control includesmicroprocessor, satellite sequencer, 4 status lights, 5-hourbypass timer, and locked enclosure.Sound-reduction kit (sizes 044-134 only) provides aspecially designed system of fan propellers and stacks thatlower noise without reducing unit performance. The kit iscompatible with the Motormaster® V accessory.

Unloader conversion kit allows you to convert factory-installed pressure unloaders to electric unloading.Compressor grille package (sizes 044-134 only)protects the compressor area after the unit is installed.Condenser coil grille package (sizes 044-134 only)protects the condenser area after the unit is installed.Accumulator (sizes 024-084 only) should be used onany VAV application or any CV unit separated by 75 ft ormore from indoor coil to minimize risk of liquid slugentering compressor. One accumulator needed per refrig-erant circuit. Hot gas bypass kit allows additional capacity reductionfor unit and prevention of indoor coil freezing. Carefulattention should be placed on system oil management.

UNLOADER, ACCUMULATOR, AND NFD FACTORY-INSTALLED AVAILABILITY

LEGEND

*Requires 2 fielded-installed accumulators, part number KH73LZ001.

38AH UNIT SIZE

OPTION CODEAA AC* -- BA DA

PU EU ACC NFD PU EU ACC NFD PU EU ACC NFD PU EU ACC NFD PU EU ACC NFD024 1 — — — — 2 — — — — — — — — — — — — — —028 1 — — — — 2 — — — — — — — — — — — — — —034 1 — — — — 2 — — — — — — — — — — — — — —044 — — — — — — — — 1 — — — — 1 2 — 1 — 2 —054 — — — — — — — — 1 — — — — 2 2 — 1 — 2 —064 — — — — — — — — 1 — — — — 2 2 — 1 — 2 —074 — — — — — — — — 1 — — — — 2 2 — 1 — 2 —084 — — — — — — — — 1 — — — — 2 2 — 1 — 2 —094 — — — — — — — — 2 — 2 — — 3 2 — — — — —104 — — — — — — — — 2 — 2 — — 2 2 — — — — —124 — — — — — — — — — — — — — — — — 2 — 4 —134 — — — — — — — — — — — — — — — — 2 — 4 —

38AH UNIT SIZE

OPTION CODEFA KA LA HA JA

PU EU ACC NFD PU EU ACC NFD PU EU ACC NFD PU EU ACC NFD PU EU ACC NFD024 — — — — — — — — — — — — — — — — — — — —028 — — — — — — — — — — — — — — — — — — — —034 — — — — — — — — — — — — — — — — — — — —044 — 1 2 — 1 — 2 1 — 1 2 1 1 — — 1 — 1 2 1054 — 2 2 — 1 — 2 1 — 2 2 1 1 — — 1 — 2 2 1064 — 2 2 — 1 — 2 1 — 2 2 1 1 — — 1 — 2 2 1074 — 2 2 — 1 — 2 1 — 2 2 1 1 — — 1 — 2 2 1084 — 2 2 — 1 — 2 1 — 2 2 1 1 — — 1 — 2 2 1094 — — — — — — — — — — — — 2 — 2 1 — 3 2 1104 — — — — — — — — — — — — 2 — 2 1 — 2 2 1124 — 4 4 — 2 — 4 2 — 4 4 2 — — — — — — — —134 — 4 4 — 2 — 4 2 — 4 4 2 — — — — — — — —

AA — Standard Unit, Dual Circuit (Sizes 024-034)AC — Standard Unit, VAV (Sizes 024-034)ACC — AccumulatorBA — Standard Unit, VAV (Sizes 044-104)DA — Single Circuit (Sizes 044-084);

Dual Module Unit (Sizes 124-134)EU — Electric UnloaderFA — Single ckt and VAV (Sizes 044-084);

Dual Module Unit, VAV (Sizes 124-134)HA — Standard Unit, NFD (Sizes 044-104)

Options and accessories (cont)

JA — Standard Unit, VAV, NFD (Sizes 044-104)KA — Single Circuit and NFD (Sizes 044-084);

Dual Module Unit, NFD (Sizes 124-134)LA — Single Circuit, VAV and NFD (Sizes 044-084);

Dual Module Unit, VAV, NFD (Sizes 124-134)NFD — Non-Fused DisconnectPU — Pressure UnloaderVAV — Variable Air Volume- - — Standard Unit, Dual Circuit (Sizes 044-104)

19

CONDENSER COIL OPTIONS*

LEGEND *See “Selection Guide: Environmental Corrosion Protection” CatalogNo. 04-581006-01 for more information.

COPPER-TUBE COILSWITH ENVIRO-SHIELD™

OPTION

ENVIRONMENT

Standard MildCoastalModerateCoastal

SevereCoastal Industrial

CombinedIndustrial/Coastal

Al Fins (Standard Coils) XCu Fins XAl Fins, E-Coated XCu Fins, E-Coated X XAl Fins, Pre-Coated X

Al — AluminumCu — CopperE-Coated — Epoxy Coating Applied to Entire Coil AssemblyEnviro-Shield — Family of Coil Protection OptionsPre-Coated — Epoxy Coating Applied to Fin Stock Material

20

Dimensions

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3-21

/ 2 [9

78]

4-3 /

16 [1

224]

054C

3-3

[991

]4-

3 /8

[122

9]

064

3-21

/ 2 [9

78]

4-1 /

2 [1

232]

064C

3-33

/ 16

[995

]4-

5 /8

[123

5]

LEG

EN

D

NO

TE

S:

1.T

he a

ppro

xim

ate

oper

atin

g w

eigh

t of t

he u

nit i

s:38

AH

044

3259

lb (

1480

kg)

38A

H04

4C

3547

lb (

1609

kg)

38A

H05

4 33

09 lb

(15

01 k

g)38

AH

054C

35

97 lb

(16

32 k

g)38

AH

064

3565

lb (

1617

kg)

38A

H06

4C

3998

lb (

1813

kg)

2.U

nit m

ust h

ave

clea

ranc

es fo

r ai

rflo

w a

s fo

llow

s:To

p —

Do

not r

estr

ict i

n an

y w

ay.

End

s —

5 ft

[152

4 m

m]

Sid

es —

6 ft

[182

9 m

m]

3.M

ount

ing

hole

s m

ay b

e us

ed t

o m

ount

uni

t to

co

ncre

tepa

d. T

hey

are

not

reco

mm

ende

d fo

r m

ount

ing

unit

tosp

ring

isol

ator

s. I

f sp

ring

isol

ator

s ar

e us

ed,

a pe

rimet

ersu

ppor

t ch

anne

l be

twee

n th

e un

it an

d th

e is

olat

ors

isre

com

men

ded.

4.Tw

o 2

in. (

51 m

m)

dia

hole

s ar

e re

com

men

ded

for

para

llel

cond

ucto

rs o

n 04

4 (2

30-v

) un

its a

nd o

n 04

4 an

d 05

4(2

08/2

30-v

) un

its.

5.A

35

/ 8 in

. (8

6 m

m)

hole

is r

ecom

men

ded

for

sing

le e

ntry

pow

er o

n 06

4 (2

08/2

30-v

) un

its.

6.“C

” in

the

pack

age

num

ber

indi

cate

s co

pper

coi

ls.

MT

G—

Mou

ntin

gS

AE

—S

ocie

ty o

f Aut

omot

ive

Eng

inee

rs

UN

IT S

UC

TIO

N A

ND

LIQ

UID

LIN

ES

DE

SC

RIP

TIO

ND

UA

L C

IRC

UIT

,ft

-in

. [m

m]

SIN

GL

E C

IRC

UIT

,ft

-in

. [m

m]

Su

ctio

n C

on

nec

tio

n(s

)0-

21/ 8

[54]

0-25

/ 8 [6

7]

Liq

uid

Co

nn

ecti

on

(s)

0-7 /

8 [2

2]0-

11/ 8

[29]

Su

ctio

n C

2-11

/ 16

[627

]1-

105 /

16 [5

67]

Liq

uid

D1-

101 /

16 [5

61]

1-10

5 /16

[567

]

Su

ctio

n (

Ckt

A)

1-71

3 /16

[503

]2-

5 /8

[626

]

Su

ctio

n (

Ckt

B)

2-5 /

8 [6

26]

—

Liq

uid

(C

kt A

)2-

53/ 4

[756

]2-

111 /

8 [8

92]

Liq

uid

(C

kt B

)2-

105 /

8 [8

79]

—

FIELD

PO

WER

SU

PPLY

CO

NN

EC

TIO

NS

38A

H U

NIT

SIZ

EV-

Ph

-Hz

DIA

ME

TE

R, i

n. [

mm

]Q

TY

044

230-

3-50

35/ 8

[92]

1

208/

230-

3-60

35/ 8

[92]

1

380/

460/

575-

3-60

21/ 2

[63.

5]1

346/

380-

415/

3/50

21/ 2

[63.

5]1

054

208/

230-

3-60

35/ 8

[92]

1

380/

460/

575-

3-60

21/ 2

[63.

5]1

346-

380/

415-

3-50

21/ 2

[63.

5]1

064

208/

230-

3-60

21/ 2

[63.

5]2

380/

460/

575-

3-60

21/ 2

[63.

5]1

346-

380/

415-

3-50

35/ 8

[92]

1

a38-7056

22

Dimensions (cont)38A

H074,0

84 U

NIT

S (See

Pag

e 23 f

or C

orne

r W

eigh

ts)

(SEE

CO

NN

ECTI

ON

S TA

BLE

)

38

AH

04

4-0

64 U

NIT

SU

CTIO

NA

ND

LIQ

UID

LIN

ES

DE

SC

RIP

TIO

ND

UA

L C

IRC

UIT

,ft

-in

. [m

m]

SIN

GL

E C

IRC

UIT

,ft

-in

. [m

m]

Su

ctio

n C

on

nec

tio

n(s

) 0

-21 /

8

[54]

0

-25 /

8

[67]

Liq

uid

Co

nn

ecti

on

(s)

0-

7 /8

[22]

0

-11 /

8

[29]

Su

ctio

n C

2-

11/ 1

6

[627

]

1-1

05/ 1

6 [5

67]

Liq

uid

D

1-10

1 /16

[561

]

1-1

05/ 1

6 [5

67]

Su

ctio

n (

Ckt

A)

1-

713 /

16 [

503]

2

-5/ 8

[626

]

Su

ctio

n (

Ckt

B)

2-

5 /8

[626

]—

Liq

uid

(C

kt A

)

2-53

/ 4

[75

6]

2-1

11/ 8

[8

92]

Liq

uid

(C

kt B

)

2-10

5 /8

[87

9]—

LEG

EN

D

NO

TE

S:

1.T

he a

ppro

xim

ate

oper

atin

g w

eigh

t of t

he u

nit i

s:38

AH

074

3812

lb [1

729

kg]

38A

H07

4C

4229

lb [1

918

kg]

38A

H08

4 40

57 lb

[184

0 kg

]38

AH

084C

47

30 lb

[214

5 kg

]

2.U

nit m

ust h

ave

clea

ranc

es fo

r ai

rflo

w a

s fo

llow

s:To

p —

Do

not r

estr

ict i

n an

y w

ay.

End

s —

5 ft

[152

4 m

m]

Sid

es —

6 ft

[182

9 m

m]

3.M

ount

ing

hole

s m

ay b

e us

ed t

o m

ount

uni

t to

con

cret

epa

d. T

hey

are

not

reco

mm

ende

d fo

r m

ount

ing

unit

tosp

ring

isol

ator

s. I

f sp

ring

isol

ator

s ar

e us

ed,

a pe

rime-

ter

supp

ort

chan

nel b

etw

een

the

unit

and

the

isol

ator

sis

rec

omm

ende

d.4.

“C”

in th

e pa

ckag

e nu

mbe

r in

dica

tes

copp

er c

oils

.

MT

G—

Mou

ntin

gS

AE

—S

ocie

ty o

f Aut

omot

ive

Eng

inee

rs

DIM

EN

SIO

NS

38A

H

UN

ITD

IME

NS

ION

Yft

-in

. [m

m]

DIM

EN

SIO

N X

ft-i

n. [

mm

]07

43-

31/ 8

[

994

mm

]4-

813 /

16 [1

443

mm

]07

4C3-

35/ 8

[

1006

mm

]-

81/ 8

[

1425

mm

]08

43-

3

[9

91 m

m]

4-9

[144

8 m

m]

084C

3-31

1 /16

[100

8 m

m]

4-8

[142

2 m

m]

FIELD

PO

WER

SU

PPLY

CO

NN

EC

TIO

NS

38A

H U

NIT

S

IZE

V-P

h-H

zD

IAM

ET

ER

,in

. [m

m]

QT

Y

074

230-

3-60

21/ 2

[63.

5]2

460-

3-60

21/ 2

[63.

5]1

575-

3-60

21/ 2

[63.

5]1

380-

3-60

35/ 8

[92.

0]1

346-

380/

415-

3-50

35/ 8

[92.

0]1

084

208/

230-

3-60

35/ 8

[92.

0]2

460-

3-60

35/ 8

[92.

0]1

575-

3-60

21/ 2

[63.

5]1

380-

3-60

35/ 8

[92.

0]1

346-

380/

415-

3-50

35/ 8

[92.

0]1

a38-7080

23

OPERATIONAL CORNER WEIGHTS WITH REFRIGERANT CHARGE (Approximate)

NOTE: “C” in the package number indicates copper coils.

38AH UNIT TOTAL WEIGHTlb [kg]

OPERATIONAL CORNER WEIGHTlb [kg]

A B C D044 3259 [1480] 939 [426] 893 [405] 695 [316] 732 [332]

044C 3547 [1609] 1013 [460] 967 [438] 765 [347] 802 [364]054 3309 [1501] 964 [437] 905 [411] 697 [316] 742 [337]

054C 3597 [1632] 1034 [469] 978 [444] 771 [350] 814 [369]064 3565 [1617] 1018 [462] 1011 [459] 765 [347] 771 [350]

064C 3998 [1813] 1125 [510] 1117 [508] 874 [397] 879 [399]074 3812 [1729] 1146 [520] 986 [447] 777 [352] 903 [410]

074C 4229 [1918] 1272 [577] 1059 [481] 862 [391] 1035 [470]084 4057 [1840] 1220 [553] 1049 [476] 827 [375] 961 [436]

084C 4730 [2145] 1425 [646] 1186 [538] 965 [438] 1159 [526]

38AH044-084 UNIT CORNER WEIGHTS

24

Dimensions (cont)

(SEE

NO

TE 4

AN

D C

ON

NEC

TIO

NS

TAB

LE)

(SEE

NO

TE 4

AN

D C

ON

NEC

TIO

NS

TAB

LE)

38A

H094 U

NIT

DIM

EN

SIO

NS

38A

H

UN

IT

DIM

EN

SIO

NS

ft-i

n. [

mm

]X

Y09

45-

6 [1

676]

2-7

[787

]09

4C5-

6 [1

676]

2-7

[787

]

LE

GE

ND

NO

TE

S:

1.T

he a

ppro

xim

ate

oper

atin

g w

eigh

t of t

he u

nit i

s:38

AH

094

— 5

088

lb [2

308

kg]

38A

H09

4C —

581

3 lb

[263

7 kg

]2.

Uni

t mus

t hav

e cl

eara

nces

for

airf

low

as

follo

ws:

Top

— D

o no

t res

tric

t in

any

way

.

End

s —

5 ft

[152

4 m

m]

Sid

es —

6 ft

[182

9 m

m]

3.M

ount

ing

hole

s m

ay b

e us

ed t

o m

ount

uni

t to

con

cret

e pa

d.T

hey

are

not

reco

mm

ende

d fo

r m

ount

ing

unit

to s

prin

g is

ola-

tors

. If

sprin

g is

olat

ors

are

used

, a

perim

eter

sup

port

cha

nnel

betw

een

the

unit

and

the

isol

ator

s is

rec

omm

ende

d.4.

Two

35/ 8

[92

mm

] di

amet

er h

oles

are

rec

omm

ende

d fo

r pa

ral-

lel c

ondu

ctor

s on

208

/230

-v u

nits

.5.

“C”

in th

e pa

ckag

e nu

mbe

r in

dica

tes

copp

er c

oils

.

MT

G—

Mou

ntin

gS

AE

—S

ocie

ty o

f Aut

omot

ive

Eng

inee

rs

FIELD

PO

WER

SU

PPLY

CO

NN

EC

TIO

NS

38A

H

UN

ITV-

Ph

-Hz

DIA

ME

TE

Rin

. [m

m]

QU

AN

TIT

Y

094

346-

380/

415-

3-50

35/ 8

[92]

120

8/23

0-3-

6035

/ 8 [9

2]2

460-

575-

380-

3-60

35/ 8

[92]

1

CO

RN

ER

WEIG

HTS

38A

H

UN

IT

OP

ER

AT

ION

AL

CO

RN

ER

WE

IGH

TS

— lb

[kg

]A

BC

D09

411

14 [5

05]

219

2 [9

94]

1182

[536

]60

1 [2

73]

094C

1273

[577

] 2

504

[113

6]13

50 [6

12]

686

[311

]

a38-7081

25

(SEE

NO

TE 4

AN

D C

ON

NEC

TIO

NS

TAB

LE)

38A

H104 U

NIT

LEG

EN

D

NO

TE

S:

1.T

he a

ppro

xim

ate

oper

atin

g w

eigh

t of t

he u

nit i

s:38

AH

-104

---

5435

lb [2

465

kg]

38A

H-1

04--

C61

60 lb

[279

4 kg

]2.

Uni

t mus

t hav

e cl

eara

nces

for

airf

low

as

fo

llow

s:To

p —

Do

not r

estr

ict i

n an

y w

ay.

End

s —

5 ft

[152

4 m

m]

Sid

es —

6 ft

[182

9 m

m]

3.M

ount

ing

hole

s m

ay b

e us

ed t

o m

ount

uni

t to

con

-cr

ete

pad.

The

y ar

e no

t rec

omm

ende

d fo

r m

ount

ing

unit

to s

prin

g is

olat

ors.

If s

prin

g is

olat

ors

are

used

, ape

rimet

er s

uppo

rt c

hann

el b

etw

een

the

unit

and

the

isol

ator

s is

rec

omm

ende

d.4.

Two

35/ 8i

n. [

92-m

m]

diam

eter

hol

es a

re r

ecom

-m

ende

d fo

r pa

ralle

l con

duct

ors

on 2

08/2

30-v

uni

ts.

5.“C

” in

the

pack

age

num

ber

indi

cate

s co

pper

coi

ls.

MT

G—

Mou

ntin

gS

AE

—S

ocie

ty o

f Aut

omot

ive

Eng

inee

rs

DIM

EN

SIO

NS

38A

H

UN

ITD

IME

NS

ION

S f

t-in

. [m

m]

XY

104

5-3

[160

0]2-

91/ 2

[851

]

104C

5-3

[160

0]2-

91/ 2

[851

]

FIELD

PO

WER

SU

PPLY

CO

NN

EC

TIO

NS

38A

H U

NIT

S

IZE

V-P

h-H

zD

IAM

ET

ER

,in

. [m

m]

QT

Y

104

208/

230-

3-60

35/ 8

[92.

0]2

380-

460-

575-

3-60

35/ 8

[92.

0]1

346-

380/

415-

3-50

35/ 8

[92.

0]1

CO

RN

ER

WEIG

HTS

38A

H

UN

ITO

PE

RA

TIO

NA

L C

OR

NE

R W

EIG

HT

S —

lb [

kg]

AB

CD

104

1240

[562

]21

38

[970

]13

02 [5

91]

755

[342

]

104C

1405

[637

]24

23 [1

099]

1476

[670

]85

6 [3

88]

a38-7082

26

Dimensions (cont)

(SEE

NO

TE 4

AN

D C

ON

NEC

TIO

NS

TAB

LE)

38A

H124 U

NIT

DIM

EN

SIO

NS

38A

H U

NIT

M

OD

UL

E

DIM

EN

SIO

NS

ft-i

n. [

mm

]X

YK

L12

4A4-

15/ 8

[126

0]3-

21/ 8

[968

]—

—12

4B—

—4-

15/ 8

[126

0]3-

21/ 8

[968

]12

4A-C

4-15

/ 8 [1

260]

3-27

/ 8 [9

86]

——

124B

-C—

—4-

15/ 8

[126

0]3-

27/ 8

[986

]

LEG

EN

D

NO

TE

S:

1.T

he a

ppro

xim

ate

oper

atin

g w

eigh

t of t

he u

nit i

s:38

AH

124

— 7

260

lb [3

293

kg]

38A

H12

4C —

812

6 lb

[368

6 kg

]2.

Uni

t mus

t hav

e cl

eara

nces

for

airf

low

as

follo

ws:

Top

— D

o no

t res

tric

t in

any

way

.E

nds

— 5

ft [1

524

mm

] S

ides

— 6

ft [1

829

mm

]3.

Mou

ntin

g ho

les

may

be

used

to

mou

nt u

nit

to c

on-

cret

e pa

d. T

hey

are

not

reco

mm

ende

d fo

r m

ount

ing

unit

to s

prin

g is

olat

ors.

If

sprin

g is

olat

ors

are

used

, a

perim

eter

sup

port

cha

nnel

bet

wee

n th

e as

sem

bled

unit

and

the

isol

ator

s is

req

uire

d. D

o no

t su

ppor

tea

ch m

odul

e se

para

tely

.4.

One

35 /

8 (9

2 m

m)

diam

eter

hol

e is

rec

omm

ende

d fo

rsi

ngle

po

wer

en

try

into

ea

ch

mod

ule

(124

A

and

124B

) of

the

unit.

5.E

ach

mod

ule

mus

t be

rigge

d in

to p

ositi

on s

epar

atel

y.T

he u

nit m

ust n

ot b

e rig

ged

afte

r m

odul

es h

ave

been

conn

ecte

d.6.

Suc

tion

and

liqui

d co

nnec

tions

can

exi

t on

eith

er s

ide

of th

e un

it.7.

Fie

ld p

ower

sup

ply

conn

ectio

ns a

re r

equi

red

for

each

mod

ule.

8.“C

” in

the

pack

age

num

ber

indi

cate

s co

pper

coi

ls.

MT

G—

Mou

ntin

gS

AE

—S

ocie

ty o

f Aut

omot

ive

Eng

inee

rs

FIELD

PO

WER

SU

PPLY

CO

NN

EC

TIO

NS

38A

H U

NIT

S

IZE

V-P

h-H

zD

IAM

ET

ER

,in

. [m

m]

QT

Y

124A

208/

230-

3-60

21/ 2

[63.

5]2

380-

460-

575-

3-60

21/ 2

[63.

5]1

346-

380/

415-

3-50

35/ 8

[92.

0]1

124B

208/

230-

3-60

21/ 2

[63.

5]2

380-

460-

575-

3-60

21/ 2

[63.

5]1

346-

380/

415-

3-50

35/ 8

[92.

0]1

CO

RN

ER

WEIG

HTS

38A

H U

NIT

M

OD

UL

EO

PE

RA

TIO

NA

L C

OR

NE

R W

EIG

HT

S —

lb [

kg]

AB

CD

124A

1037

[470

]10

30 [4

67]

779

[353

]78

5 [3

56]

124B

124A

-C11

44 [5

19]

1137

[516

]88

9 [4

03]

894

[406

]12

4B-C

a38-7083

27

(SEE

NO

TE 4

AN

D C

ON

NEC

TIO

NS

TAB

LE)

38A

H134 U

NIT

DIM

EN

SIO

NS

38A

H U

NIT

M

OD

UL

E

DIM

EN

SIO

NS

ft-i

n. [

mm

]X

YK

L

134A

4-15

/ 8 [1

260]

3-21

/ 8 [9

68]

——

134B

——

4-87

/ 8 [1

443]

3-31

/ 8

[993

]

134A

-C4-

15/ 8

[126

0]3-

27/ 8

[986

]—

—

134B

-C—

—4-

81/ 8

[142

5]3-

33/ 4

[100

6]

LEG

EN

D

NO

TE

S:

1.T

he a

ppro

xim

ate

oper

atin

g w

eigh

t of t

he u

nit i

s:38

AH

134

— 7

507

lb [3

405

kg]

38A

H13

4C —

835

7 lb

[379

1 kg

]2.

Uni

t mus

t hav

e cl

eara

nces

for

airf

low

as

follo

ws:

Top

— D

o no

t res

tric

t in

any

way

.E

nds

— 5

ft [1

524

mm

]S

ides

— 6

ft [1

829

mm

]3.

Mou

ntin

g ho

les

may

be

used

to

mou

nt u

nit

to c

on-

cret

e pa

d. T

hey

are

not

reco

mm

ende

d fo

r m

ount

ing

unit

to s

prin

g is

olat

ors.

If

sprin

g is

olat

ors

are

used

, a

peri

met

er s

uppo

rt c

hann

el b

etw

een

the

asse

mbl

edun

it an

d th

e is

olat

ors

is r

equi

red.

Do

not

supp

ort

each

mod

ule

sepa

rate

ly.

4.O

ne 3

5 /8

in.

[92

mm

] di

amet

er h

ole

is r

ecom

men

ded

for

sing

le p

ower

ent

ry in

to th

e 13

4A (

208/

230-

v) m

od-

ule

of th

e un

it. S

ingl

e po

wer

ent

ry in

to th

e 13

4B m

od-

ule

is n

ot r

ecom

men

ded.

5.E

ach

mod

ule

mus

t be

rigge

d in

to p

ositi

on s

epar

atel

y.T

he u

nit m

ust n

ot b

e rig

ged

afte

r m

odul

es h

ave

been

conn

ecte

d.6.

Suc

tion

and

liqui

d co

nnec

tions

can

exi

t on

eith

er s

ide

of th

e un

it.7.

Fie

ld p

ower

sup

ply

conn

ectio

ns a

re r

equi

red

for

each

mod

ule.

8.“C

” in

the

pack

age

num

ber

indi

cate

s co

pper

coi

ls.

MT

G—

Mou

ntin

gS

AE

—S

ocie

ty o

f Aut

omot

ive

Eng

inee

rs

FIELD

PO

WER

SU

PPLY

CO

NN

EC

TIO

NS

38A

H U

NIT

M

OD

UL

EV-

Ph

-Hz

DIA

ME

TE

R,

in. [

mm

]Q

TY

134A

208/

230-

3-60

21/ 2

[63.

5]2

380-

460-

575-

3-60

21/ 2

[63.

5]1

346-

380/

415-

3-50

35/ 8

[92.

0]1

134B

208/

230-

3-60

21/ 2

[63.

5]2

460-

575-

3-60

21/ 2

[63.

5]1

380-

3-60

35/ 8

[92.

0]1

346-

380/

415-

3-50

35/ 8

[92.

0]1

a38-7084

28

To select 38AH024-034 units — English:NOTE: See the Performance Data section for combinationratings for 38AH024-034 units and matching 40RM airhandlers. If the 38AH units are matched with 39 series airhandlers, use the Carrier Electronic Catalog AHUBuilder®software package for combination ratings. If the 10RT DX(direct expansion) water coolers are used, determine the per-formance by cross-plotting the condensing unit performancefound in the Performance Data section this book against the10RT DX performance in the 10RT DX product data book.If the 38AH condensing units are matched with 2 indepen-dent 40RM units, cross-plot for performance ratings or con-tact Carrier Application Engineering for assistance.

I. Determine cooling load, evaporator-air tem-perature and quantity.Given:Total Cooling Capacity

Required (TC) . . . . . . . . . . . . . . .235,000 BtuhSensible Heat Capacity

Required (SHC) . . . . . . . . . . . . . .185,000 BtuhTemperature Air Entering

Condenser (Edb) . . . . . . . . . . . . . . . . . . . .95 FTemperature Air Entering

Evaporator (db/wb) . . . . . . . . 80 F db, 67 F wbEvaporator Air Quantity. . . . . . . . . . . . . 8000 cfmExternal Static Pressure . . . . . . . . . . . .0.80 in. wgLength of Interconnecting

Refrigerant Piping . . . . . . . . . . . . .30 ft (Linear)II Select condensing unit air-handler

combination.For this example, select a 38AH024 matchedwith a 40RM024. (See Combination Ratings tableon page 39.) This 38AH024/40RM024 condens-ing unit-air handler combination provides 237,200Btuh of total cooling capacity and 188,600 Btuh ofsensible capacity at the given conditions. If othertemperatures or airflow values are required, interpo-late the values from the combination ratings.

III Determine sizes of liquid and suction lines.Enter the Refrigerant Piping Requirements table onpage 122. The sizes shown are based on a linearlength of pipe. For this example, note in the linearlength column that the proper pipe size is 5/8 in. forthe liquid lines and 13/8 in. for the suction lines.

To select 38AH044-134 units — English:I. Determine required capacity, saturated suc-

tion temperature (SST) at the compressors,and the temperature of the air entering thecondensing unit.Given:Cooling Load . . . . . . . . . . . . . . . . .625,000 BtuhSaturated Suction Temperature . . . . . . . . . . .40 FEntering-Air Temperature . . . . . . . . . . . . . . .95 F

II. Enter the Condensing Unit Ratings table onpage 31 at the given saturated suctiontemperature and entering-air temperature forthe required cooling capacity.The 38AH064 unit has a cooling capacity of634,000 Btuh at 40 F SST and 95 F entering-airtemperature; the unit meets requirements accordingto the given conditions.System requirements can often be met by combin-ing 38AH condensing units with one or two airhandlers.

To select 38AH024-034 units — SI:NOTE: This book contains combination ratings for38AH024-034 units and matching 40RM air handlers. Ifthe 38AH units are matched with 39 Series air handlers,use the Carrier AHU (Air-Handling Unit) selection programsoftware package for combination ratings. If the 10RT DXwater coolers are used, determine the performance bycross-plotting the condensing unit performance found inthis book against the 10RT DX performance in the 10RTDX product data book. If the 38AH condensing units arematched with 2 independent 40RM units, cross-plot forperformance ratings or contact Carrier Application Engi-neering for assistance.

I Determine cooling load, evaporator-air tem-perature and quantity.Given:Total Cooling CapacityRequired (TC) . . . . . . . . . . . . . . . . . . . . . . 60 kWSensible Heat Capacity

Required (SHC) . . . . . . . . . . . . . . . . . . . 48 kWTemperature Air Entering

Condenser (Edb) . . . . . . . . . . . . . . . . . . . 36 CTemperature Air Entering

Evaporator (db/wb) . . . . . . 26.7 C db, 20 C wbEvaporator Air Quantity. . . . . . . . . . . . . 3800 L/s

External Static Pressure . . . . . . . . . . . . .150 PaLength of Interconnecting

Refrigerant Piping . . . . . . . . . . . . 18 m (Linear)II Select condensing unit air-handler combination.

For this example, select a 50 Hz, 38AH024matched with a 40RM024. This 38AH024/40RM024 condensing unit-air handler combinationprovides 62.5 kW of total cooling capacity and49.2 kW of sensible capacity at the given conditionsshown on page 88. If other temperatures or airflowvalues are required, interpolate the values from thecombination ratings.

III Determine sizes of liquid and suction lines.Enter the Refrigerant Piping Requirements table onpage 125. The sizes shown are based on an equiva-lent length of pipe. For this example, note in the lin-ear length column that the proper pipe size is5/8 in. for the liquid lines and 13/8 in. for the suc-tion lines.

Selection procedure

29

To select 38AH044-134 units — SI:I. Determine required capacity, saturated suc-

tion temperature (SST) at the compressors,and the temperature of the air entering thecondensing unit.Given:Cooling Load . . . . . . . . . . . . . . . . . . . . . 183 kWSaturated suction temperature . . . . . . . . . . . . 4 CEntering-air temperature . . . . . . . . . . . . . . . 35 C

II. Enter the Condensing Unit Ratings table onpage 43 at the given saturated suction tem-perature and entering-air temperature for therequired cooling capacity.The 60 Hz, 38AH064 unit has a cooling capacity of183.4 kW at 4 C SST and 35 C entering-airtemperature; the unit meets requirements accordingto the given conditions.

System selection procedure — 38AH044-134System requirements can often be met by combining38AH condensing units with one or two air handlers.

For systems with one air handler:Use a personal computer and Carrier’s AHUBuilder®Selection program to select a 39 series air handler withdirect-expansion (DX) coils. Enter the software programand input your job requirements. From the list presented,select a 38AH condensing unit that you estimate will meetcapacity requirements. For sizes 044-084, you can selecteither a standard dual-circuit unit (designated D) or anoptional single-circuit manifolded unit (designated S). Allother sizes have dual circuits only.

After you have selected a 38AH unit, you can check itsperformance with one or several DX coils. From the DXcoil list presented on the screen, match the 38AH with anycoil or all coils. The program calculates the combinedperformance of the condensing unit and each DX coil andpresents the resulting system capacities and operatingtemperatures. Matching thermostatic expansion valves andnozzles for the DX coils are automatically selected anddisplayed.

For systems with two air handlers:Use a personal computer and Carrier’s AHUBuilder®selection software to select a 39 Series air handler withdirect-expansion (DX) coils.

For the first air handler, enter the AHU selectionprogram and input the job requirements. To choose acondensing unit, select the “Specify Your Own” option.The program asks you for condensing unit capacities at30 F and 50 F SST. See the Condensing Unit Circuit andModule Ratings tables on pages 34-38, 46-53, 61-68and 80-87 in this book, and enter the capacities fromcondenser circuit A or B (remember to use the correct AirTemperature Entering Condenser column when locatingthe circuit capacities).

For the second air handler, repeat the procedure toselect the second DX coil for the condenser circuit (A or B)not used in the first selection.

30

CONDENSING UNIT RATINGS, 60 Hz ENGLISH

LEGEND

38AH024

SST(F)

Condenser Entering-Air Temperature (F)85 95 100 105 115

20TC 157 143 136 129 115kW 14.1 14.9 15.2 15.5 16.0SDT 105 115 120 125 135

25TC 178 163 156 149 134kW 14.7 15.6 16.0 16.4 17.0SDT 106 116 121 126 135

30TC 198 183 176 168 153kW 15.3 16.3 16.8 17.3 18.1SDT 107 117 121 126 135

35TC 221 205 197 189 173kW 15.9 17.1 17.6 18.1 19.1SDT 109 118 123 128 137

40TC 244 227 219 21

Product 38AH024-134 Data Condensing UnitsThe 38AH units offer high unit EERs (Energy Efficiency...

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Transcript of Product 38AH024-134 Data Condensing UnitsThe 38AH units offer high unit EERs (Energy Efficiency...