Manuals / Carrier / Household Appliance / Air Conditioner

Carrier 38AH044-084 specifications

Models: 38AH044-084

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38AH

*To control heating device and provide automatic indoor- fan operation on heating.

²Jumper removed only when separate 24-v trans- former power source is used to power the 33CSUCE-06 relay pack.

**Field-supplied.

NOTES:

Internal 33CSUCE-06 relay contacts are rated for 1 amp/24 vac.

1.Liquid line solenoid valve LLS-A1 is used for solenoid drop on circuit A. Liquid line solenoid valve LLS-B1 is used for solenoid drop for circuit B.

2.Solenoid drop is a safety feature which prevents refrigerant migration to the compressor during the OFF cycle. It is rec- ommended on all systems and required on systems where piping exceeds 75 ft (22.9 m) in length.

3.The 33CSUCE-06 relay pack requires 10 va.

4.Factory wiring is in accordance with NEC; ®eld modi®cations or additions must be in compliance with all applicable codes.

5.Wiring for ®eld power supply must be rated 75 C mini- mum. Use copper, copper-clad aluminum, or aluminum con- ductors. Maximum incoming wire size for each terminal block is 500 kcmil.

6.Terminal blocks are for external ®eld control connections. Con- trol connections must be Class 1 wiring.

7.Field-supplied components (IFC, LLS-A1, and LLS-B1) must have a maximum sealed coil rating of 30 va each (0.25 amp at 120 vac and 0.13 amp at 230 vac). Thermostats must have a minimum pilot duty rating as follows:

	38AH	VA	AMPS	VAC
		(Ea Stage)

	094	275	2.29	120
			1.15	240

	104	325	2.70	120
			1.35	240

8.Replacement of factory wires must be with type 105 C wire or its equivalent.

9.Field-supplied liquid line solenoid valves in- stalled at the evaporator are required on all units.

10.Units 38AH094 has 140 va and unit 38AH104 has 130 va of power available for ®eld- installed accessories.

11.To minimize voltage drop, the following wire sizes are recommended:

	LENGTH Ð	INSULATED WIRE Ð
		AWG
	Ft (M)
		(35 C Minimum)

	Up to 50	No. 18
	(15.2)

	50-75	No. 16
	(15.2-22.9)

	More Than 75	No. 14
	(22.9)

		LEGEND
AWG	Ð American Wire Gage
CR	Ð Control Relay
HD	Ð Heating Device
IFC	Ð	Indoor-Fan Contactor
IFR	Ð	Indoor-Fan Relay
kcmil	Ð	Thousand Circular Mils
LLS	Ð	Liquid Line Solenoid
NEC	Ð National Electrical Code
		(U.S.A. Standard)

RÐ Heating Relay (®eld- supplied 24-v sealed coil,

RV	Ð	10 va maximum rating)
RV	Ð	Reversing Valve
TB	Ð	Terminal Block
		Factory Wiring
		Field Wiring

Fig. 22 Ð Field Wiring, One 2-Stage Thermostat Ð Units 38AH094 and 104

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Carrier 38AH044-084 specifications

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 Optional Single-CircuitUnits and 38AH124,134 Modular Units Dual-CircuitÐ 60 HzModular Units Dual-CircuitÐ 60 Hz Modular Units Dual Circuit Ð 50 Hz Optional Single-CircuitUnits and 38AH124,134Modular 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 offFig. 16 Ð Units 38AH124 and 134 with Installed Connect Tubing from Evaporator to UnitPiping 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 Step 5 Ð Install Accessories PRE-START-UPSystem Check START-UP Preliminary ChecksFig. 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 kPagTable 18 Ð Pressure Switch Settings Psig kPag Fig. 44 Ð Unloader Location and SettingsCapacity Control Table 20 Ð One 2-StageThermostat Capacity Table 19A Ð One 2-StageThermostat CapacityControl for 38AH044-084 Dual-CircuitUnits Control for 38AH094-134UnitsCONTROL Fig. 45 Ð Accumulator and Fusible PlugFig. 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