Carrier 38AH044-084 Manuel d'utilisateur Page 1

Installation, Start-Up andService InstructionsCONTENTSPageSAFETY CONSIDERATIONS ... 1INSTALLATION ... 1-37Step 1

Table 3A — Units 38AH044-084 Physical Data — 50/60 Hz (English)38AH 044 054 064 074 084OPERATING WEIGHT WITH Cu-Al 3259 3309 3565 3812 4057REFRIGERANT

Table 4A — Units 38AH094-134 Physical Data — 50/60 Hz (English)38AH 094 104124 134124A 124B 134A 134BOPERATING WEIGHT WITH Cu-Al 5088 5435 3630* 3630*

Fig. 7 — Modules 38AH124A or 134A — Shipping Locations of Pipingand Sheet Metal Trim KitRIGHERERIGHERERIGHERERIGHERECONTROLBOXSHEET METAL COVERPANEL (

FACTORY-INSTALLEDSUCTIONLINE LOOPFig. 9A — Typical Module with CoverPanels RemovedFig. 9B — Field-Installed Suction Line Loop38AH044-084,124,134MOUNTI

Step 3 — Make Refrigerant PipingConnectionsThe field-supplied liquid line solenoid valve must beinstalled at the evaporator to avoid possible compresso

*Field-Supplied.Fig. 12 — Required Location of Solenoid Valves and Recommended Filter Drier andSight Glass Locations for 38AH044-084 Optional Single-C

Table 6A — Refrigerant Piping Requirements — 38AH044-104 Dual-Circuit Units — 60 HzUNIT38AHTOTAL LINEAR LENGTH OF INTERCONNECTING PIPE — FT (M)15-25(4

Table 7A — Refrigerant Piping Requirements, 38AH044-104 Dual-Circuit Units — 50 HzUNIT38AHTOTAL LINEAR LENGTH OF INTERCONNECTING PIPE — FT (M)15-25(4.

Table 8A — Refrigerant Piping Requirements for 38AH044-084Optional Single-Circuit Units and 38AH124,134Modular Units (Dual-Circuit) — 60 HzUNIT38AHTOT

Table 9A — Refrigerant Piping Requirements for 38AH044-084Optional Single-Circuit Units and 38AH124,134Modular Units (Dual Circuit) — 50 HzUNIT38AHTOT

The placement area must be level and strong enough tosupport the operating weight of the unit (see Table 3A or3B). When unit is in proper location, us

LEGENDTXV — Thermostatic Expansion ValveTYP — TypicalNOTE: Lower split first on, last off.Fig. 14 — Typical Piping Connections for Face Split Coils for

Units 38AH124 and 134 Piping Kit Connections — The38AH124 and 134 units are delivered with a factory-supplied suction and liquid piping kit for instal

BASE RAILBOLTS (6)CORNER POSTCORNERPOSTFig. 17 — Units 38AH124 and 134 with Installed TrimKit RailsEND COVERFLANGESSCREWS BTOP COVER,VERTICALPIECEVERT

Step 4 — Make Electrical ConnectionsPOWER SUPPLY — Electrical characteristics of availablepower supply must agree with unit nameplate rating. Supplyvo

Table 10B — Electrical Data — 50/60 Hz (38AH044-084 Optional Single-Circuit Units)OPTIONAL SINGLE-CIRCUIT UNIT COMPRESSOR*38AHVoltageDesignationCompre

Table 11 — Electrical Data — 50/60 Hz (Units 38AH094,104)UNIT38AHVOLTAGEDESIGNATIONNAMEPLATEV-Ph-HzSUPPLYVOLTAGE*MCA MOCP ICFCOMPRESSOR†A1 A2 B1 B2Min

Table 12 — Electrical Data — 50/60 Hz (Units 38AH124, 134)UNIT38AHMODULEVOLTAGEDESIGNATIONCOMPRESSORA1/A2MODEL NO.NAMEPLATEV-Ph-HzSUPPLYVOLTAGE*MCA MO

Table 14 — Fan Motor Electrical DataUNIT38AHCONDENSER FANNameplateV-Ph-HzQtyHp(kW)TotalkW(No.*) FLA Each (No.*) LRA Each044208/230-3-6041(0.746)6.2(1,

LEGENDAWG — American Wire GageCR — Control RelayHD — Heating DeviceIFC — Indoor-Fan ContactorIFR — Indoor-Fan Relaykcmil — Thousand Circular MilsLLS —

LEGENDAWG — American Wire GageCR — Control RelayHD — Heating DeviceIFC — Indoor-Fan ContactorIFR — Indoor-Fan Relaykcmil — Thousand Circular MilsLLS —

Remove sheet metal cover panels from return-bend end ofModule 124B or 134B. Place Module 124B or 134B inposition. The exposed return-bend ends of each

LEGENDAWG — American Wire GageCR — Control RelayHD — Heating DeviceIFC — Indoor-Fan ContactorIFR — Indoor-Fan Relaykcmil — Thousand Circular MilsLLS —

LEGENDAWG — American Wire GageC—Compressor ContactorCCPS — Capacity Control PressureSwitchCR — Control RelayHD — Heating DeviceIFC — Indoor-Fan Contac

*Field-supplied.NOTES:1. Factory wiring is in accordance with NEC; field modifications or addi-tions must be in compliance with all applicable codes.2.

*Field-supplied.NOTES:1. Factory wiring is in accordance with NEC; field modifications or addi-tions must be in compliance with all applicable codes.2.

*Field-supplied.NOTES:1. Factory wiring is in accordance with NEC. Field modificationsor additions must be in compliance with all applicable codes.2. W

*Field-supplied.NOTES:1. Factory wiring is in accordance with NEC. Field modifications oradditions must be in compliance with all applicable codes.2. W

*Field-supplied.NOTES:1. Factory wiring is in accordance with NEC. Field modifications oradditions must be in compliance with all applicable codes.2. W

Table 15 — Main Power Connection and Control Circuit WiringMAIN POWER CONNECTION CONTROL CIRCUITElectricalCharacteristics(V-Ph-Hz)QtyTerminalBlocksQty

START-UPCompressor crankcase heaters must be on for 24 hoursbefore start-up. To energize the crankcase heaters, set thespace thermostat above the ambi

NOTE: Use only Carrier approved compressor oil. Ap-proved sources are: Petroleum Specialties Inc. (Cryol 150A),Texaco, Inc. (Capella WF-32-150), and W

DUAL CKT SINGLE CKTSUCTIONCONNECTION(S)21⁄89 Dia [54 mm] 25⁄89 Dia [67 mm]LIQUIDCONNECTION(S)7⁄89 Dia [22 mm] 11⁄89 Dia [29 mm]SUCTION C 28-11⁄169 [62

Table 16 — Index of Lead/Lag Circuits and CompressorsUNIT38AH044-084STD044-084OPT094 104 124 134LEAD CIRCUIT AAAAModule124AModule134ACompressor, Lead

Fig. 30 — Charging Chart — Unit 38AH044; 50/60 Hz — Dual CircuitFig. 31 — Charging Chart — Unit 38AH054; 50/60 Hz — Dual Circuit41

Fig. 32 — Charging Chart — Unit 38AH064; 50/60 Hz — Dual CircuitFig. 33 — Charging Chart — Unit 38AH074; 50/60 Hz — Dual Circuit42

Fig. 34 — Charging Chart — Unit 38AH084; 50/60 Hz — Dual CircuitFig. 35 — Charging Chart — Unit 38AH044;50/60 Hz — Optional Single CircuitFig. 36 — Ch

Fig. 37 — Charging Chart — Unit 38AH064;50/60 Hz — Optional Single CircuitFig. 38 — Charging Chart — Unit 38AH074;50/60 Hz — Optional Single CircuitFi

Fig. 40 — Charging Chart — Unit 38AH094; 50/60 HzFig. 41 — Charging Chart — Unit 38AH104; 50/60 HzFig. 42 — Charging Chart — Modules 124A, 124B,and 13

SERVICEELECTRIC SHOCK HAZARDTurn off all power to unit before servicing.The ON-OFF switch on control paneldoes not shut off control power; use fielddis

Winter Start Control — A21⁄2-minute low-pressure switch(LPS) bypass function in the timer prevents nuisance LPStrips during start-up in low-ambient co

Table 19A — One 2-Stage Thermostat CapacityControl for 38AH044-084 Dual-Circuit UnitsUNIT38AHQUANTITY OF LOADEDCOMPRESSOR CYLINDERSSYSTEMCAPACITY(%)Ci

Timer Functions — (See Timer Cycle, Fig. 47.) Eachrefrigeration circuit is controlled by an independent timerwhich allows for the independent operatio

DUAL CKT SINGLE CKTSUCTIONCONNECTION(S)21⁄89 Dia [54 mm] 25⁄89 Dia [67 mm]LIQUIDCONNECTION(S)7⁄89 Dia [22 mm] 11⁄89 Dia [29 mm]SUCTION C 28-11⁄169 [62

38AH044-084 DUAL-CIRCUIT UNITS; 38AH094,104 —If circuit A operation is insufficient for the cooling require-ments, the thermostat second stage TC2 clo

Required Compressor Modification for 38AH044-084 Optional Single-Circuit Units, When Com-pressor A1 is Out —To maintain unit operation, com-pressor no.

Compressor Removal — Access to the pump endof the compressor is from the compressor side of the unit.Access to the motor end of the compressor is from

TROUBLESHOOTINGPROBLEM SOLUTIONCOMPRESSOR DOES NOT RUNContactor Open1. Power off. 1. Restore power.2. Fuses blown in field power circuit. 2. After findi

TROUBLESHOOTING (cont)PROBLEM SOLUTIONCOMPRESSOR STOPS ON OIL PRESSURE SWITCH1. Oil level too low or too high. 1. Check oil level requirements; adjust

START-UP CHECKLISTA. Preliminary InformationOUTDOOR: MODEL NO. SERIAL NO.INDOOR: AIR HANDLER MANUFACTURERMODEL NO. SERIAL NO.ADDITIONAL ACCESSORIESB.

C. Start-UpCHECK EVAPORATOR FAN SPEED AND RECORD.CHECK CONDENSER FAN SPEED AND RECORD.AFTER AT LEAST 10 MINUTES RUNNING TIME, RECORD THE FOLLOWING MEA

Chart 1, Field Power Supply ConnectionsUNIT38AHVOLTAGE Hz DIAMETER — in. (mm) QUANTITY094208/230 60 35⁄8(92) 2460, 575,38060 35⁄8(92) 1346, 380/415 50

Chart 1, Field Power Supply ConnectionsUNIT38AHVOLTAGE Hz DIAMETER — in. (mm) QUANTITY104208/230 60 35⁄8(92) 2460, 575,38060 35⁄8(92) 1346, 380/415 50

Chart 1, Field Power Supply ConnectionsUNIT38AHVOLTAGE HzDIAMETER(in.)QUANTITY124A124B208/230 60 35⁄8(92) 1460, 575,38060 21⁄2(63) 1346, 380/415 50 35

Chart 1, Field Power Supply ConnectionsUNIT38AHVOLTAGE HzDIAMETER —in. (mm)QUANTITY134A208/230 60 35⁄8(92) 1460, 575, 380 60 21⁄2(63) 1346, 380/415 50