Carrier 38AE016, 38AE012, 38AE014 specifications Complete Electrical Connections, Nec

Page 7

INSTALL FILTER DRIER(S) AND MOISTURE INDICA- TOR(S) Ð Every unit should have a ®lter drier and liquid- moisture indicator (sight glass). In some applications, depending on space and convenience requirements, it may be desirable to install 2 ®lter driers and sight glasses. One ®lter drier and sight glass may be installed at A locations in Fig. 4. Or, 2 ®lter driers and sight glasses may be installed at B locations.

Select the ®lter drier for maximum unit capacity and mini- mum pressure drop. Complete the refrigerant piping from indoor unit to outdoor unit before opening the liquid and suc- tion lines at the outdoor unit.

TXV Ð Thermal Expansion Valve

Fig. 4 Ð Location of Sight Glass(es)

and Filter Drier(s)

INSTALL LIQUID LINE SOLENOID VALVE Ð SOLE- NOID DROP Ð It is recommended that a solenoid valve be placed in the main liquid line (see Fig. 4) between condens- ing unit (38AE/AKS) and fan coil (40RR, 40RE). (A liquid line solenoid valve is required when the liquid line length exceeds 100 ft [30.5 m] or when the condensing unit is con- nected to the chiller barrel in a built-up chiller system.) This valve prevents refrigerant migration (which causes oil dilu- tion) to the compressor during the off cycle at low outdoor ambient temperatures. The solenoid should be wired in par- allel with the compressor contactor coil. This means of elec- trical control is referred to as solenoid drop control.

INSTALL LIQUID LINE SOLENOID VALVE (OPTIONAL)

ÐCAPACITY CONTROL Ð If 2-step cooling is desired, place a solenoid valve in the location shown in Fig. 4.

MAKE PIPING CONNECTIONS Ð Do not remove run- around loop from suction and liquid line stubs in the com- pressor compartment until piping connections are ready to be made. Pass nitrogen or other inert gas through piping while brazing to prevent formation of copper oxide.

Install ®eld-supplied thermostatic expansion valve(s) in in- door section. If 2 thermostatic expansion valves are installed for 2-step cooling, install ®eld-supplied liquid line solenoid valve ahead of the second expansion valve.

PROVIDE SAFETY RELIEF Ð A fusible plug is located on the compressor crankcase or in the liquid line (Fig. 5). Do not cap this plug. If local code requires additional safety devices, install them as directed.

NOTE: 38AKS024 has a fusible plug in the liquid line.

Fig. 5 Ð Location of Fusible Plug (38AE)

Step 4 Ð Install Accessories Ð Field install ac- cessories such as winter start control or low-ambient control before proceeding with wiring. Refer to the instructions shipped with the accessory.

Step 5 Ð Complete Electrical Connections

POWER WIRING Ð Unit is factory wired for voltage shown on nameplate. Provide adequate fused disconnect switch within sight from unit and readily accessible from unit, but out of the reach of children. Lock switch open (off) to prevent power from being turned on while unit is being serviced. Discon- nect switch, fuses, and ®eld wiring must comply with na- tional and local code requirements. See Tables 5A and 5B.

Route power wires through opening in unit end panel to connection in unit control box as shown on unit label dia- gram and in Fig. 6. Unit must be grounded.

Affix crankcase heater warning sticker to unit disconnect switch.

CONTROL CIRCUIT WIRING Ð Control voltage is 24 v. See Fig. 7 and unit label diagram for ®eld-supplied wiring details. Route control wires through opening in unit end panel to connection in unit control box.

 

LEGEND

EQUIP GND Ð Equipment Ground

NEC

Ð National Electrical Code

Factory Wiring

Field Wiring

Fig. 6 Ð Main Power Supply Wiring

7

Page 6 Page 8
Image 7
Page 6 Page 8
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 Charging Data R-22 PRE-START-UPBefore Starting Unit ensure the following START-UP38AE012 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.
Top Page Image Contents