Manuals / Carrier / Household Appliance / Air Conditioner

Carrier 38AH044-084 specifications Field-supplied

Models: 38AH044-084

1 56

Download 56 pages 61.81 Kb

Page 29

Manual background

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 valves LLS-A1 and A2 are used for solenoid drops.

2.Solenoid drop is a safety feature which prevents refrigerant migration to the compressor during 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-01 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 minimum. Use copper, copper-clad aluminum, or aluminum conductors. Maximum incoming wire size for each terminal block is 500 kcmil.

6.Terminal blocks are for external ®eld control con- nections. Control connections are to be Class 1 wiring.

7.Field-supplied components (IFC, LLS-A1, and LLS-A2) 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 of 300 va (2.5 amps at 120 vac and

1.3amps 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. 21 Ð Field Wiring, One 2-Stage Thermostat Ð 38AH044-084 Optional Single-Circuit Units

29

Image 29

Carrier 38AH044-084 specifications Field-supplied

Contents

SAFETY CONSIDERATIONS CONTENTSINSTALLATION Step 5 Ð Install AccessoriesTable 1 Ð Rigging Center of Gravity Ð in. mm Table 2B Ð Operational Corner Weights with Table 2A Ð Operational Corner Weights withStep 2 Ð Check Compressor Mounting Refrigerant Charge Approximate Ð LbChart 1, Field Power Supply Connections Fig. 1 Ð Dimensions Ð Units 38AH044,054,064Chart 1, Field Power Supply Connections Fig. 2 Ð Dimensions Ð Units 38AH074,084UNIT Fig. 3 Ð Dimensions Ð Unit 38AH094VOLTAGE DIAMETER Ð in. mmUNIT Fig. 4 Ð Dimensions Ð Unit 38AH104VOLTAGE DIAMETER Ð in. mmUNIT Fig. 5 Ð Dimensions Ð Unit 38AH124VOLTAGE DIAMETERUNIT Fig. 6 Ð Dimensions Ð Unit 38AH134VOLTAGE DIAMETER Ð38AH 38AH and Sheet Metal Trim Unit 38AH134 Shown and Sheet Metal Trim KitRIG HERE RIG HERE RIG HEREFig. 9A Ð Typical Module with Cover Fig. 9B Ð Field-InstalledSuction Line LoopPanels Removed Fig. 10 Ð Outer View, Compressor MountingTable 5 Ð Liquid Lift Step 3 Ð Make Refrigerant Piping ConnectionsFig. 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 Modular Units Dual Circuit Ð 50 Hz Modular Units Dual Circuit Ð 50 HzOptional Single-CircuitUnits and 38AH124,134 Optional Single-CircuitUnits and 38AH094-134UnitsLEGEND TXV Ð Thermostatic Expansion Valve TYP Ð Typical NOTE Lower split rst on, last offPiping Kit Fig. 16 Ð Units 38AH124 and 134 with InstalledConnect Tubing from Evaporator to Unit Fig. 19 Ð Fully Assembled Piping and Trim Kit Kit RailsUnit 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 System Check Step 5 Ð Install AccessoriesPRE-START-UP Fig. 29 Ð 06E Compressors, Typical START-UPPreliminary Checks 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 38AH054 Charging Chart Ð Unit 38AH044Fig. 35 Ð Fig. 36 ÐCharging Chart Ð Unit 38AH074 Charging Chart Ð Unit 38AH064Fig. 39 Ð Charging Chart Ð Unit 38AH084 Fig. 37 ÐFig. 41 Ð Charging Chart Ð Unit 38AH104 50/60 Hz Fig. 40 Ð Charging Chart Ð Unit 38AH094 50/60 HzFig. 42 Ð Charging Chart Ð Modules 124A, 124B Fig. 43 Ð Charging Chart Ð Module 134BRefrigerant Circuit SERVICECompressor Motor Protection Table 17 Ð Fan Cycling Control Ð Psig kPagCapacity Control Table 18 Ð Pressure Switch Settings Psig kPagFig. 44 Ð Unloader Location and Settings Control for 38AH044-084 Dual-CircuitUnits Table 19A Ð One 2-StageThermostat CapacityTable 20 Ð One 2-StageThermostat Capacity Control for 38AH094-134UnitsFig. 46 Ð Pressure-ActuatedCapacity Control Valve CONTROLFig. 45 Ð Accumulator and Fusible Plug Fig. 47 Ð Timer Cycle Fig. 48 Ð Unit Control Box Fig. 49 Ð Condenser Fan AdjustmentCompressor Replacement Ð Perform the following TROUBLESHOOTING TROUBLESHOOTING cont A. Preliminary Information START-UPCHECKLISTB. Pre-Start-Up OUTDOOR UNITC. Start-Up