Carrier 38AE Series Air Conditioners: Installation and Service Manual Guide
Page 1

38AE012,014,016

38AKS024 Air-Cooled Condensing Units 50/60 Hz

Installation, Start-Up and

Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Step 1 Ð Complete Pre-Installation Checks . . . . 1

Step 2 Ð Rig and Mount the Unit . . . . . . . . . . . . . 6

Step 3 Ð Complete Refrigerant Piping

Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Step 4 Ð Install Accessories . . . . . . . . . . . . . . . . . 7

Step 5 Ð Complete Electrical Connections . . . . 7

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Evacuate and Dehydrate . . . . . . . . . . . . . . . . . . . . . . 9

Leak Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Turn On Crankcase Heaters . . . . . . . . . . . . . . . . . . 9

Add Preliminary Charge . . . . . . . . . . . . . . . . . . . . . . 9

Before Starting Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 9

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-13

To Start Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Oil Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Check Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

OPERATING SEQUENCE . . . . . . . . . . . . . . . . . . . . 13

Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Fan Cycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Winter Start Control . . . . . . . . . . . . . . . . . . . . . . . . . 13

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13,14

Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Head Pressure Control . . . . . . . . . . . . . . . . . . . . . . 13

Time Guard II Circuit . . . . . . . . . . . . . . . . . . . . . . . 13

Winter Start Control . . . . . . . . . . . . . . . . . . . . . . . . . 13

Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Outdoor Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Cleaning Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 15,16

START-UP CHECKLIST . . . . . . . . . . . . . . . . CL-1,CL-2

SAFETY CONSIDERATIONS

Installing, starting up, and servicing air-conditioning equip- ment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated struc- tures, etc.).

Only trained, quali®ed installers and service mechanics should install, start-up, and service this equipment (Fig. 1).

Untrained personnel can perform basic maintenance func- tions such as cleaning coils. All other operations should be performed by trained service personnel.

When working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached to the equipment.

Follow all safety codes. Wear safety glasses and work gloves. Keep quenching cloth and ®re extinguisher nearby when brazing. Use care in handling, rigging and setting bulky equipment.

ELECTRIC SHOCK HAZARD

Separate power sources (main and control power circuits) are used for these units. Be sure both main and control power circuits are disconnected before servicing.

INSTALLATION

Step 1 Ð Complete Pre-Installation Checks

UNCRATE UNIT Ð Remove unit packaging except for the top skid assembly, which should be left in place until after the unit is rigged into its ®nal location.

INSPECT SHIPMENT Ð File claim with shipping com- pany if shipment is damaged or incomplete.

CONSIDER SYSTEM REQUIREMENTS

·Consult local building codes and National Electrical Code (NEC, U.S.A.) for special installation requirements.

·Allow sufficient space for air¯ow clearance, wiring, re- frigerant piping, and servicing unit. See Fig. 1. See Fig. 2 for unit component locations.

·Locate unit so that outdoor coil (condenser) air¯ow is un- restricted on all sides and above.

·Unit may be mounted on a level pad directly on the base channels or mounted on raised pads at support points. See Table 1A-1D for unit operating weights. See Table 2 for weight distribution based on recommended support points.

NOTE: If vibration isolators are required for a particular installation, use the data in Table 2 to make the proper selection.

Manufacturer reserves the right to discontinue, or change at any time, speci®cations or designs without notice and without incurring obligations.

Book

1

4

 

PC 111

Catalog No. 563-746

Printed in U.S.A.

Form 38A-4SI

Pg 1

4-94

Replaces: 38AE-17SI

Tab

3a

2a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Contents Safety Considerations ContentsInstallation 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 ConnectionsIFC Ð Electrical Data 3 Ph/50 HzLlsv 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 Preliminary Information START-UP ChecklistPre-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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