Carrier 38AH044-084 specifications Field Wiring, One 2-Stage Thermostat Ð Units 38AH124

Page 31

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

²Field-supplied.

NOTES:

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

1.Liquid line solenoid valves LLS-A1 and A2 are used for solenoid drop on Module 124A or 134A on cir- cuit A. Liquid line solenoid valves LLS-B1 and B2 are used for solenoid drop for Module 124B or 134B. 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.

2.Disconnect black wire from CR2 terminal 6; cap loose end and secure. Connect new ®eld-supplied wire from CR2 terminal 6 to TB3 terminal 1 on module 124B or 134B.

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 minimum. Use copper, copper-clad aluminum, or aluminum conductors. Maximum incoming wire size for each terminal block is 500 kcmil.

6.Terminal blocks (TB3) are for external ®eld control connections. Control connections must be Class 1 wiring.

7.Field-supplied components (IFC, LLS-A1,A2, and LLS-B1,B2) 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).

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)

 

50-75

No. 16

(15.2-22.9)

 

More Than 75

No. 14

(22.9)

 

LEGEND

AWG Ð American Wire Gage

CÐ Compressor Contactor CCPS Ð Capacity Control Pressure

CR

 

Switch

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

10 va maximum rating)

Ð Reversing Valve

SDR

Ð Solenoid Drop Relay

TB

Ð Terminal Block

TR

Ð Timer Relay

 

Factory Wiring

 

Field Wiring

Fig. 23 Ð Field Wiring, One 2-Stage Thermostat Ð Units 38AH124 and 134

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Contents Installation, Start-Up Service Instructions Unit Rigging Center of Gravity Ð in. mmModule Weight Unit Total Operational Corner WeightCheck Compressor Mounting Dimensions Ð Units 38AH044,054,064 Dimensions Ð Units 38AH074,084 Chart 1, Field Power Supply Connections Dimensions Ð Unit 38AH094Dimensions Ð Unit 38AH104 Dimensions Ð Unit 38AH124 Dimensions Ð Unit 38AH134 Ð Units 38AH044-084 Physical Data Ð 50/60 Hz SI Ð Units 38AH044-084 Physical Data Ð 50/60 Hz EnglishÐ Units 38AH094-134 Physical Data Ð 50/60 Hz SI Ð Units 38AH094-134 Physical Data Ð 50/60 Hz EnglishControl BOX Sheet Metal Cover Panel Removed Ð Typical Module with Cover Panels Removed Liquid Lift Make Refrigerant Piping ConnectionsUnit Maximum Liquid Lift Pipe D Diameter Unit STR Ð StreetDual Circuit Single Circuit 38AH 044 Total Linear Length of Interconnecting Pipe Ð FT M Unit 15¤8 21¤8 124B,134A 074 Total Linear Length of Interconnecting Pipe Ð FT Unit15-20 20-50 50-75 124B, 134A 07438AH 6.1 TXV Ð Thermostatic Expansion Valve TYP Ð Typical Units 38AH124 and 134 with Installed Piping Kit Fully Assembled Piping and Trim Kit Unit 38AH134 Shown Kit RailsÐ Electrical Data Ð 50/60 Hz 38AH044-084 Dual-Circuit Units Make Electrical ConnectionsFLA Optional SINGLE-CIRCUIT Unit CompressorRLA CKT Model Electrical Data Ð 50/60 Hz Units 38AH094,104Unit Voltage Nameplate Supply COMPRESSOR² MCA DesignationControl Circuit Electrical Data Ð 50/60 Hz Electrical Data Ð 50/60 Hz Units 38AH124Unit 38AH Module Fan Motor Electrical DataUnit Condenser FAN 38AH Nameplate Qty Total No.* FLA Each No.* LRA EachLength 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 Control Power Install AccessoriesMain Power Connection and Control Circuit Wiring Main Power Connection Control Circuit06E Compressors, Typical Preliminary ChecksAdjust Refrigerant Charge Compressor, Lead Compressor Lag Index of Lead/Lag Circuits and Compressors044-084 094 104 124 134 38AH STD OPT Lead CircuitCharging 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 38AH104 50/60 Hz Charging Chart Ð Unit 38AH094 50/60 HzRefrigerant Circuit Control by Pressure ± 10 Switch Opens 160 Switch Closes 255Fan Cycling Control Ð Psig kPag CUT-IN Ð Cutout Ð Pressure Switch Settings Psig kPagSwitch Cutout CUT-IN Capacity ControlLoaded Cylinders Quantity of Loaded System Unit Compressor Cylinders38AH Circuit Total Unit Quantity System CapacityControl Timer Cycle Unit Control Box Compressor OIL Required Compressor Replacement Ð Perform the following06E-250 06E-265 06E-275 06E-299 Compressor Stops on HIGH-PRESSURE Switch Problem Solution Compressor does not RUNCompressor Cycles on LOW-PRESSURE Switch Troubleshooting Pre-Start-Up Preliminary InformationComp A1 Comp A2 Comp B1 Comp B2 Start-Up

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.
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