Manuals / Carrier / Household Appliance / Air Conditioner

Carrier 38AH044-084 specifications

Models: 38AH044-084

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

*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:

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

2.Solenoid drop is a safety feature which pre- vents refrigerant migration to the compressor dur- ing the OFF cycle. It is recommended 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 compli- ance with all applicable codes.

5.Wiring for ®eld power supply must be rated 75 C minimum. Use copper, copper-clad alumi- num, or aluminum conductors. Maximum in- coming wire size for each terminal block is 500 kcmil.

6.Terminal blocks TB3 and TB4 are for external ®eld control connections. Control connections are to be Class 1 wiring.

7.Field-supplied components (IFC, LLS-A, and LLS-B) must have a maximum sealed coil rat- ing 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 of 300 va (2.5 amps at 120 vac and 1.3 amps at 230 vac).

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

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

10.Units have 175 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)	No. 18
	(15.2)
	50-75	No. 16
	(15.2-22.9)	No. 16
	(15.2-22.9)
	More Than 75	No. 14
	(22.9)	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. 20 Ð Field Wiring, One 2-Stage Thermostat Ð 38AH044-084 Dual-Circuit Units

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Carrier 38AH044-084 specifications

Contents

CONTENTS SAFETY CONSIDERATIONSINSTALLATION Step 5 Ð Install AccessoriesTable 1 Ð Rigging Center of Gravity Ð in. mm Table 2A Ð Operational Corner Weights with Table 2B Ð Operational Corner Weights withStep 2 Ð Check Compressor Mounting 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 ConnectionsFig. 3 Ð Dimensions Ð Unit 38AH094 UNITVOLTAGE DIAMETER Ð in. mmFig. 4 Ð Dimensions Ð Unit 38AH104 UNITVOLTAGE DIAMETER Ð in. mmFig. 5 Ð Dimensions Ð Unit 38AH124 UNITVOLTAGE DIAMETERFig. 6 Ð Dimensions Ð Unit 38AH134 UNITVOLTAGE DIAMETER Ð38AH 38AH and Sheet Metal Trim Kit and Sheet Metal Trim Unit 38AH134 ShownRIG HERE RIG HERE RIG HEREFig. 9B Ð Field-InstalledSuction Line Loop Fig. 9A Ð Typical Module with CoverPanels Removed 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 and 38AH094-134Units Optional Single-CircuitUnitsLEGEND TXV Ð Thermostatic Expansion Valve 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 Kit Rails Fig. 19 Ð Fully Assembled Piping and Trim KitUnit 38AH134 Shown 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 Charging Chart Ð Unit 38AH044 Charging Chart Ð Unit 38AH054Fig. 35 Ð Fig. 36 ÐCharging Chart Ð Unit 38AH064 Charging Chart Ð Unit 38AH074Fig. 39 Ð Charging Chart Ð Unit 38AH084 Fig. 37 ÐFig. 40 Ð Charging Chart Ð Unit 38AH094 50/60 Hz Fig. 41 Ð Charging Chart Ð Unit 38AH104 50/60 HzFig. 42 Ð Charging Chart Ð Modules 124A, 124B Fig. 43 Ð Charging Chart Ð Module 134BSERVICE Refrigerant CircuitCompressor Motor Protection 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 19A Ð One 2-StageThermostat Capacity Control for 38AH044-084 Dual-CircuitUnitsTable 20 Ð One 2-StageThermostat Capacity 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 START-UPCHECKLIST A. Preliminary InformationB. Pre-Start-Up OUTDOOR UNITC. Start-Up