Carrier 38AH044-084 Compressor Replacement Ð Perform the following, Compressor OIL Required

Page 52

Compressor Removal Ð Access to the pump end of the compressor is from the compressor side of the unit. Access to the motor end of the compressor is from the inside of the unit. All compressors can be removed from the com- pressor side of the unit.

IMPORTANT: All compressor mounting hardware and support brackets removed during servicing must be re- installed prior to start-up.

1.Disconnect power to unit; lockout power to compressor.

2.Close suction and discharge service valves.

3.Relieve refrigerant pressure into a refrigerant recovery system.

4.Remove:

a.Fan-cycling pressure switch (FCPS)

b.High-pressure switch

c.Low-pressure switch

d.Oil-pressure switch

e.Discharge gas temperature switch.

5.Disconnect power wires at terminal box and disconnect conduit.

6.Disconnect wires from crankcase heater.

7.Disconnect service valves from compressor.

NOTE: On 38AH044-084 optional single-circuit units and units with 2 compressors per circuit, disconnect both oil equalizer lines located on the motor barrel and on the oil pump sump.

8.Units 38AH044-084, 124, and 134:

a.Remove 4 large screws securing compressor mount- ing pan to unit base rail.

b.Slide compressor (on mounting pan) to outside of unit frame; support and/or lower to ground.

c.Unbolt compressor from mounting pan and remove.

9.Units 38AH094, 104:

a.Remove 4 large screws securing compressor to the com- pressor rails.

b.Lift compressor off mounting bolts and remove.

Compressor Replacement Ð Perform the following:

1.Reverse procedure in Compressor Removal section to end of Step 4.

2.Reinstall service valves and safety switches, and tighten to torques as listed:

Torque

 

Compressor(s)

Tighten discharge valves to Ð

 

20-25 ft-lbs ( 27- 34 N-m)

 

06E-250

80-90 ft-lbs (109-122 N-m)

 

06E-265,275,299

Tighten suction valves to Ð

 

 

80- 90 ft-lbs (109-122 N-m)

06E-250

90-120 ft-lbs (122-163 N-m)

06E-265,275,299

Tighten the following ®ttings as speci®ed Ð

60 ft-lbs (81 N-m)

Discharge Gas Thermostat

120 in.-lbs (13.5 N-m)

High-Pressure Switch, Fan-

 

Cycling Pressure Switch

120 in.-lbs (13.5 N-m)

Low-Pressure Switch

3.Leak-check and evacuate system, reclaim refrigerant.

4.Recharge system per pre-start-up and start-up sequences. Recheck oil levels.

5.Energize crankcase heater for 24 hours prior to restart of system.

OIL CHARGE Ð (Refer to Table 3A, 3B, 4A, or 4B.) All units are factory charged with oil. Acceptable oil level for each compressor is from 1¤8 to 1¤3 of sight glass (see Fig. 29, page 38).

When additional oil or a complete charge is required, use only Carrier-approved compressor oil.

Approved oils are:

Petroleum Specialties, Inc. Ð Cryol 150A (factory oil charge)

Texaco, Inc.

Ð Capella WF-32-150

 

Witco Chemical Co.

Ð Suniso 3GS

 

 

 

 

 

COMPRESSOR

OIL REQUIRED

 

Pts

 

L

 

 

06E-250

17

 

8.0

06E-265

21

 

9.9

06E-275

21

 

9.9

06E-299

19

 

9.0

Do not reuse drained oil, and do not use any oil that has been exposed to atmosphere.

Adjust oil level in accordance with Start-Up, Preliminary Oil Charge, page 38.

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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 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 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 Total Linear Length of Interconnecting Pipe Ð FT Unit 124B,134A 07415-20 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 Kit Rails Fully Assembled Piping and Trim Kit Unit 38AH134 ShownMake Electrical Connections Ð Electrical Data Ð 50/60 Hz 38AH044-084 Dual-Circuit UnitsFLA Optional SINGLE-CIRCUIT Unit CompressorRLA Electrical Data Ð 50/60 Hz Units 38AH094,104 Unit Voltage Nameplate Supply COMPRESSOR² MCADesignation CKT ModelElectrical Data Ð 50/60 Hz Units 38AH124 Control Circuit Electrical Data Ð 50/60 HzFan Motor Electrical Data Unit Condenser FAN38AH Nameplate Qty Total No.* FLA Each No.* LRA Each 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 Install Accessories Main Power Connection and Control Circuit WiringMain Power Connection Control Circuit Control PowerPreliminary Checks 06E Compressors, TypicalAdjust Refrigerant Charge Index of Lead/Lag Circuits and Compressors 044-084 094 104 124 134 38AHSTD OPT Lead Circuit 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 HzRefrigerant Circuit Control by Pressure ± 10 Switch Opens 160 Switch Closes 255Fan Cycling Control Ð Psig kPag Pressure Switch Settings Psig kPag Switch Cutout CUT-INCapacity Control CUT-IN Ð Cutout ÐQuantity of Loaded System Unit Compressor Cylinders 38AH Circuit TotalUnit Quantity System Capacity Loaded CylindersControl 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 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.
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