Carrier 38AE012 Pre-Start-Up, Before Starting Unit ensure the following, Charging Data R-22

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PRE-START-UP

Evacuate and Dehydrate the entire refrigerant sys- tem by either of the methods described in Carrier Standard Service Techniques Manual, Chapter 1.

Leak Test the entire refrigerant system by the pres- sure method described in Carrier Standard Service Tech- niques Manual, Chapter 1. Use R-22 at approximately 25 psig (172.4 kPa) backed up with an inert gas to a total pressure not to exceed 245 psig (1689 kPa).

Turn on Crankcase Heaters for 24 hours before start- ing the unit to be sure all the refrigerant is out of the oil. To energize the crankcase heaters, proceed as follows.

1.Set the space thermostat set point above the space tem- perature so there is no demand for cooling.

2.Close the ®eld disconnect.

3.Turn the fan circuit breaker on. Leave the compressor cir- cuit breakers off. The crankcase heaters are now energized.

Add Preliminary Charge to the refrigerant system ac- cordingly to Carrier Standard Service Techniques Manual, Chapter 1. By the liquid charging method and charging by weight procedure, charge the units with approximately the amounts of R-22 refrigerant shown in Table 6.

Table 6 Ð Charging Data (R-22)

 

REFRIGERANT CHARGE - lb (kg)

CONDENSING

UNIT

Required Charge

Outdoor Unit

TEMP

 

Above Clear

Total Charge

DURING

 

Sight Glass

(Approx)

CHARGING - F (C)

38AE012

3.0 (1.4)

22 (10)

125 (51.7)

38AE014

4.8 (2.2)

23 (10.5)

123 (50.6)

38AE016

3.4 (1.5)

23 (10.5)

130 (54.4)

38AKS024

3.4 (1.5)

28 (12.7)

131 (54.8)

 

 

 

 

Before Starting Unit ensure the following:

1.Compressor oil level must be at least within sight in the compressor sight glass. Add oil if necessary (see Tables 1A-1D and Oil Charge section).

2.Compressor holddown bolts must be snug, but not tight. Refer to Compressor Mounting section and tag on com- pressor foot.

3.All internal wiring connections must be tight; all barriers and covers must be in place.

4.Electrical power source must agree with unit nameplate rating.

5.All service valves must be open.

6.Crankcase heater must be ®rmly locked into the com- pressor crankcase.

START-UP

To Start Unit Ð Set thermostat set point below the space temperature. After starting unit, there is a delay of at least 3 seconds before compressor starts.

Oil Charge (see Tables 1A-1D) ÐAllow unit to run for about 20 minutes. Stop unit and check compressor oil level at sight glass. Add oil if necessary to bring oil to the correct level shown in Fig. 8. Use only Carrier-approved compres- sor oil. Approved oils are:

Witco Chemical Corp. . . . . . . . . . . . . . . . . Suniso 3GS Texaco, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . . . WF32 Petroleum Specialties Co. . . . . . . . . . . . . . . . Cryol 150

Do not reuse drained oil or use any oil that has been ex- posed to atmosphere. Procedures for adding or removing oil are given in Carrier Standard Service Techniques Manual, Chapter 1, Refrigerants.

If oil is added, run unit for additional 10 minutes. Stop unit and check oil level. If level is still low, add oil only after determining that piping system is designed for proper oil re- turn and that the system is not leaking oil.

38AKS024

38AE012,014,016

(06E COMPRESSOR)

(06D COMPRESSOR)

Fig. 8 Ð Operating Oil Levels

Refrigerant Charge Ð Actual start-up should be done only under supervision of a quali®ed refrigeration me- chanic. Refer to charging charts.

See Fig. 9-11 for the particular unit being charged. Mea- sure pressure at the liquid line service valve, being sure a Schrader depressor is used if required. Also, measure liquid line temperature as close to the liquid service valve as pos- sible. Add or reduce charge until the pressure and tempera- ture conditions of the charging charge curve are met. If liq- uid pressure and temperature point falls above curve, add charge. If liquid pressure and temperature point falls below curve, reduce the charge until the conditions match the curve.

Never charge liquid into the low-pressure side of sys- tem. Do not overcharge. During charging or removal of refrigerant, be sure indoor fan system is operating.

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Contents Contents Safety ConsiderationsInstallation Dimensions ft-in Component Locations Typical Ð 38AE Shown Ð Physical Data SI, 60 Hz Ð Physical Data English, 60 HzÐ Physical Data SI, 50 Hz Ð Physical Data English, 50 HzComplete Refrigerant Piping Connections Rig and Mount the UnitNEC Complete Electrical ConnectionsÐ Electrical Data 3 Ph/50 Hz IFCLlsv Ð Before Starting Unit ensure the following PRE-START-UPSTART-UP Charging Data R-2238AE012 and 38AKS024 Charging Chart 38AE014 Charging Chart 38AE016 Charging Chart Operating Sequence ServiceOutdoor Fan LubricationProblem Solution TroubleshootingCompressor Running but Cooling Insufficient TroubleshootingPage Packaged Service Training START-UP Checklist Preliminary InformationPre-Start-Up Start-Up

38AE014, 38AE016, 38AE012 specifications

The Carrier 38AE012, 38AE016, and 38AE014 are part of the Carrier series of packaged rooftop air conditioning units, designed to deliver reliable and efficient cooling solutions for commercial and industrial applications. These units showcase advanced engineering and technology, addressing the diverse needs of modern HVAC systems.

One of the primary features of the Carrier 38AE series is their high-efficiency performance. They utilize advanced scroll compressor technology, which results in lower energy consumption while providing consistent cooling. With high SEER (Seasonal Energy Efficiency Ratio) ratings, these units help businesses reduce operational costs while maintaining comfortable indoor environments.

The construction of the Carrier 38AE units emphasizes durability and resilience. Built with high-quality materials, they are engineered to withstand harsh weather conditions and the rigors of daily use. The weatherized cabinets protect internal components from precipitation and corrosion, ensuring long-term reliability.

The 38AE series incorporates a sophisticated electronic control system that enhances performance monitoring and diagnostics. This feature allows facility managers to easily manage and optimize the unit's operations, improving efficiency and reducing potential downtime. Integrated with smart controls, these systems can be programmed for specific operating schedules, allowing for further energy savings.

Another standout technology in the Carrier 38AE series is the environmentally friendly refrigerant. By utilizing R-410A, these units contribute to reduced ozone depletion while still providing powerful cooling capabilities. This aligns with contemporary regulatory standards and climate initiatives to promote sustainable usage of HVAC systems.

The Carrier 38AE012, 38AE016, and 38AE014 models also excel in noise reduction technology, which is essential for commercial settings where ambient noise levels need to be minimized. The design includes low-noise fans and strategically placed insulation, resulting in quieter operation that enhances comfort for occupants.

In terms of installation, these units are versatile and can be easily mounted on building rooftops or on the ground. They feature a compact design, which facilitates seamless integration into existing structures without requiring extensive modifications.

Overall, the Carrier 38AE012, 38AE016, and 38AE014 models stand out for their combination of efficiency, durability, and advanced technology. They cater to a wide range of commercial needs, providing essential cooling while prioritizing sustainability and user comfort. With a commitment to innovation, Carrier continues to be a leader in the HVAC industry, ensuring that their products meet the evolving demands of energy efficiency and reliability.
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