Carrier 38AH044-084 specifications Field Wiring, One 2-Stage Thermostat Ð Units 38AH094

Page 30

*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)

Reversing Valve

TB

Ð

Terminal Block

 

 

Factory Wiring

 

 

Field Wiring

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

30

Page 29 Page 31
Image 30
Page 29 Page 31
Contents Installation, Start-Up Service Instructions Rigging Center of Gravity Ð in. mm UnitModule Unit Total Operational Corner Weight WeightCheck Compressor Mounting Dimensions Ð Units 38AH044,054,064 Dimensions Ð Units 38AH074,084 Dimensions Ð Unit 38AH094 Chart 1, Field Power Supply ConnectionsDimensions Ð Unit 38AH104 Dimensions Ð Unit 38AH124 Dimensions Ð Unit 38AH134 Ð Units 38AH044-084 Physical Data Ð 50/60 Hz English Ð Units 38AH044-084 Physical Data Ð 50/60 Hz SIÐ Units 38AH094-134 Physical Data Ð 50/60 Hz English Ð Units 38AH094-134 Physical Data Ð 50/60 Hz SIControl BOX Sheet Metal Cover Panel Removed Ð Typical Module with Cover Panels Removed Make Refrigerant Piping Connections Liquid LiftUnit Maximum Liquid Lift STR Ð Street Pipe D Diameter UnitDual Circuit Single Circuit 38AH 044 Total Linear Length of Interconnecting Pipe Ð FT M Unit 15¤8 21¤8 Total Linear Length of Interconnecting Pipe Ð FT Unit 124B,134A 074124B, 134A 074 15-20 20-50 50-7538AH 6.1 TXV Ð Thermostatic Expansion Valve TYP Ð Typical Units 38AH124 and 134 with Installed Piping Kit Kit Rails Fully Assembled Piping and Trim Kit Unit 38AH134 ShownMake Electrical Connections Ð Electrical Data Ð 50/60 Hz 38AH044-084 Dual-Circuit UnitsOptional SINGLE-CIRCUIT Unit Compressor FLARLA Designation Electrical Data Ð 50/60 Hz Units 38AH094,104Unit Voltage Nameplate Supply COMPRESSOR² MCA CKT ModelElectrical Data Ð 50/60 Hz Units 38AH124 Control Circuit Electrical Data Ð 50/60 Hz38AH Nameplate Qty Total No.* FLA Each No.* LRA Each Fan Motor Electrical DataUnit Condenser FAN Unit 38AH ModuleLength Ð Insulated Wire Ð AWG Length Ð Insulated Wire Ð AWG Field Wiring, One 2-Stage Thermostat Ð Units 38AH094 Field Wiring, One 2-Stage Thermostat Ð Units 38AH124 GND Terminal Block for Field Wiring, Single ModuPanel Control, Unit 38AH094 Field Wiring, Single ModuPanel Control, Unit 38AH104 Field Wiring, Single ModuPanel Control, Units 38AH124 Main Power Connection Control Circuit Install AccessoriesMain Power Connection and Control Circuit Wiring Control PowerPreliminary Checks 06E Compressors, TypicalAdjust Refrigerant Charge STD OPT Lead Circuit Index of Lead/Lag Circuits and Compressors044-084 094 104 124 134 38AH Compressor, Lead Compressor LagCharging Chart Ð Unit 38AH044 50/60 Hz Ð Dual Circuit Charging Chart Ð Unit 38AH064 50/60 Hz Ð Dual Circuit Page Page Charging Chart Ð Unit 38AH094 50/60 Hz Charging Chart Ð Unit 38AH104 50/60 HzControl by Pressure ± 10 Switch Opens 160 Switch Closes 255 Refrigerant CircuitFan Cycling Control Ð Psig kPag Capacity Control Pressure Switch Settings Psig kPagSwitch Cutout CUT-IN CUT-IN Ð Cutout ÐUnit Quantity System Capacity Quantity of Loaded System Unit Compressor Cylinders38AH Circuit Total Loaded CylindersControl Timer Cycle Unit Control Box Compressor Replacement Ð Perform the following Compressor OIL Required06E-250 06E-265 06E-275 06E-299 Problem Solution Compressor does not RUN Compressor Stops on HIGH-PRESSURE SwitchCompressor Cycles on LOW-PRESSURE Switch Troubleshooting Preliminary Information Pre-Start-UpStart-Up Comp A1 Comp A2 Comp B1 Comp B2

38AH044-084 specifications

The Carrier 38AH044-084 is an innovative air conditioning unit designed to provide efficient cooling solutions for residential and light commercial applications. This model is a part of Carrier's Aqua Series and is well-regarded for its combination of performance, energy efficiency, and innovative features.

One of the standout characteristics of the Carrier 38AH044-084 is its high-efficiency rating, which often exceeds the minimum efficiency standards set by the Department of Energy. Its Seasonal Energy Efficiency Ratio (SEER) rating is commendable, indicating significant energy savings over traditional air conditioning units. This efficiency translates to lower utility bills and a reduced carbon footprint, making it an environmentally friendly option.

In terms of technology, the Carrier 38AH044-084 is equipped with a modern scroll compressor. This type of compressor is known for its durability and quiet operation, contributing to a more pleasant indoor environment. The unit also incorporates advanced refrigerant technology, often using R-410A refrigerant, which is recognized for its lower environmental impact compared to older refrigerants like R-22.

The design of the 38AH044-084 focuses on ease of installation and maintenance. The compact footprint makes it suitable for various installation scenarios, whether on rooftops or ground levels. Additionally, the unit is engineered for durability, featuring weather-resistant components that can withstand harsh environmental conditions.

Another notable feature is the advanced airflow system, which ensures even distribution of cooled air throughout the space. This technology minimizes hot spots and enhances overall comfort. Furthermore, the unit supports a range of thermostatic controls, allowing users to customize their cooling experience according to their specific needs.

The Carrier 38AH044-084 is also designed with noise reduction in mind. Its sound-dampening technology helps minimize operational noise, making it a suitable choice for residential areas where noise levels are a concern.

In summary, the Carrier 38AH044-084 offers an excellent combination of energy efficiency, advanced technology, and user-friendly features. Whether for a home or a light commercial space, this unit provides reliable cooling performance while maintaining a focus on environmental responsibility and occupant comfort. With its robust design and innovative capabilities, it's a solid choice for those seeking effective and efficient air conditioning solutions.
Top Page Image Contents