Manuals / Carrier / Household Appliance / Air Conditioner

Carrier 38AH044-084 specifications Field-supplied NOTES

Models: 38AH044-084

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*Field-supplied.

NOTES:

1.	Factory wiring is in accordance with NEC. Field modi®cations
	or additions must be in compliance with all applicable codes.
2.	Wiring for ®eld power supply must be rated 75 C minimum. Use
	copper, copper-clad aluminum, or aluminum conductors. Maxi-
	mum incoming wire size for each terminal block is 500 kcmil.
3.	Terminal blocks TB3, TB4, TBX1, and TBX2 are for external
	®eld control connections. Control connections are to be
	Class 1 wiring.

LEGEND

4.	Field-supplied components (IFC, LLS-A1, A2, B1, and B2) must
	have a maximum sealed coil rating of 30 va each (0.25 amp at
	120 vac, 0.13 amp at 230 vac). AHMS IFC-AUX contact must
	have minimum pilot duty rating of 325 va each (2.7 amps at
	120 vac, 1.4 amps at 230 vac).
5.	Replacement of factory wires must be with type 105 C wire or
	its equivalent.
6.	Field-supplied liquid line solenoid valves installed at the evapo-
	rator are required on all units.
7.	Control has 25 va of power available for ®eld-installed
	accessories.

AHMS Ð Air Handler Motor Starter

AUX Ð Auxiliary

CÐ Compressor Contactor

FU Ð Fuse

GND	Ð Equipment Ground
IFC	Ð	Indoor Fan Control
kcmil	Ð	Thousand Circular Mils
LLS	Ð	Liquid Line Solenoid
NEC	Ð National Electrical Code
		(U.S.A. Standard)

SDR	Ð Solenoid Drop Relay
TB	Ð Terminal Block
TBX	Ð Terminal Block for Variable
TM	Air Volume Units
TM	Ð Timer Motor
TR	Ð Timer Relay

TRAN Ð Transformer

UÐ Unloader Solenoid

Factory Wiring Field Wiring

Fig. 26 Ð Field Wiring, Single ModuPanel™ Control, Unit 38AH094

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Carrier 38AH044-084 specifications Field-supplied NOTES

Contents

INSTALLATION CONTENTSSAFETY CONSIDERATIONS Step 5 Ð Install AccessoriesTable 1 Ð Rigging Center of Gravity Ð in. mm Step 2 Ð Check Compressor Mounting Table 2A Ð Operational Corner Weights withTable 2B Ð Operational Corner Weights with Refrigerant Charge Approximate Ð LbFig. 1 Ð Dimensions Ð Units 38AH044,054,064 Chart 1, Field Power Supply ConnectionsFig. 2 Ð Dimensions Ð Units 38AH074,084 Chart 1, Field Power Supply ConnectionsVOLTAGE Fig. 3 Ð Dimensions Ð Unit 38AH094UNIT DIAMETER Ð in. mmVOLTAGE Fig. 4 Ð Dimensions Ð Unit 38AH104UNIT DIAMETER Ð in. mmVOLTAGE Fig. 5 Ð Dimensions Ð Unit 38AH124UNIT DIAMETERVOLTAGE Fig. 6 Ð Dimensions Ð Unit 38AH134UNIT DIAMETER Ð38AH 38AH RIG HERE and Sheet Metal Trim Kitand Sheet Metal Trim Unit 38AH134 Shown RIG HERE RIG HEREPanels Removed Fig. 9B Ð Field-InstalledSuction Line LoopFig. 9A Ð Typical Module with Cover Fig. 10 Ð Outer View, Compressor MountingStep 3 Ð Make Refrigerant Piping Connections Table 5 Ð Liquid LiftFig. 13 Ð Double Suction Riser Construction 38AH054-104 Dual-CircuitUnits Ð 60 Hz 38AH054-104 Dual-CircuitUnits Ð 50 Hz Modular Units Dual-CircuitÐ 60 Hz Optional Single-CircuitUnits and 38AH124,134Modular Units Dual-CircuitÐ 60 Hz Optional Single-CircuitUnits and 38AH124,134 Modular Units Dual Circuit Ð 50 HzModular Units Dual Circuit Ð 50 Hz LEGEND TXV Ð Thermostatic Expansion Valve and 38AH094-134UnitsOptional Single-CircuitUnits TYP Ð Typical NOTE Lower split rst on, last offConnect Tubing from Evaporator to Unit Fig. 16 Ð Units 38AH124 and 134 with InstalledPiping Kit Unit 38AH134 Shown Kit RailsFig. 19 Ð Fully Assembled Piping and Trim Kit Cover Unit 38AH134 ShownStep 4 Ð Make Electrical Connections OPTIONAL SINGLE-CIRCUITUNIT UNIT UNIT Table 14 Ð Fan Motor Electrical Data Page Field-supplied 38AH LENGTH Ð FU Ð Fuse FU Ð Fuse Field-supplied NOTES Field-supplied NOTES Field-supplied NOTES PRE-START-UP Step 5 Ð Install AccessoriesSystem Check Preliminary Checks START-UPFig. 29 Ð 06E Compressors, Typical Adjust Refrigerant Charge If the initial check shows too much oil too high in the sight glass remove oil to proper level. See Preliminary Oil Charge for proper procedure for adding and removing oil Fig. 30 Ð Charging Chart Ð Unit 38AH044 50/60 Hz Ð Dual Circuit Fig. 32 Ð Charging Chart Ð Unit 38AH064 50/60 Hz Ð Dual Circuit Fig. 35 Ð Charging Chart Ð Unit 38AH044Charging Chart Ð Unit 38AH054 Fig. 36 ÐFig. 39 Ð Charging Chart Ð Unit 38AH084 Charging Chart Ð Unit 38AH064Charging Chart Ð Unit 38AH074 Fig. 37 ÐFig. 42 Ð Charging Chart Ð Modules 124A, 124B Fig. 40 Ð Charging Chart Ð Unit 38AH094 50/60 HzFig. 41 Ð Charging Chart Ð Unit 38AH104 50/60 Hz Fig. 43 Ð Charging Chart Ð Module 134BCompressor Motor Protection SERVICERefrigerant Circuit Table 17 Ð Fan Cycling Control Ð Psig kPagFig. 44 Ð Unloader Location and Settings Table 18 Ð Pressure Switch Settings Psig kPagCapacity Control Table 20 Ð One 2-StageThermostat Capacity Table 19A Ð One 2-StageThermostat CapacityControl for 38AH044-084 Dual-CircuitUnits Control for 38AH094-134UnitsFig. 45 Ð Accumulator and Fusible Plug CONTROLFig. 46 Ð Pressure-ActuatedCapacity Control Valve Fig. 47 Ð Timer Cycle Fig. 49 Ð Condenser Fan Adjustment Fig. 48 Ð Unit Control BoxCompressor Replacement Ð Perform the following TROUBLESHOOTING TROUBLESHOOTING cont B. Pre-Start-Up START-UPCHECKLISTA. Preliminary Information OUTDOOR UNITC. Start-Up