Carrier 48EJ, 48EW, 48EY024-068, 48AW, 48AY020-060, 48EK, 48AK Motor Limitations, Air Quality Limits

Page 79

Table 33 — Motor Limitations

STANDARD EFFICIENCY MOTORS

Nominal Bhp

 

Maximum Bhp

 

 

 

Maximum Amps

Maximum

Maximum

 

 

 

230 v

 

460 v

 

575 v

Watts

Efficiency

 

 

 

 

 

 

 

5

5.9

 

14.6

 

7.9

 

6.0

 

5,030

 

87.5

7.5

8.7

 

22.0

 

 

7,717

 

84.1

9.5

 

 

 

12.0

 

10.0

 

8,008

 

88.5

 

 

 

 

 

 

 

10

10.2

 

28.0

 

 

8,502

 

89.5

11.8

 

 

 

14.6

 

12.0

 

9,836

 

89.5

 

 

 

 

 

 

 

15

15.3

 

43.8

 

 

12,543

 

91.0

18.0

 

 

 

21.9

 

19.0

 

14,756

 

91.0

 

 

 

 

 

 

 

20

22.4

 

62.0

 

 

18,363

 

91.0

23.4

 

 

 

28.7

 

23.0

 

19,183

 

91.0

 

 

 

 

 

 

 

25

28.9

 

72.0

 

 

23,511

 

91.7

29.4

 

 

 

37.4

 

31.0

 

23,918

 

91.7

 

 

 

 

 

 

 

30

35.6

 

95.0

 

 

28,742

 

92.4

34.7

 

 

 

48.0

 

47.0

 

28,015

 

92.4

 

 

 

 

 

 

 

40

42.0

 

110.0

 

55.0

 

48.8

 

33,690

 

93.0

 

 

 

 

 

 

 

 

 

 

HIGH EFFICIENCY MOTORS

 

 

 

Nominal Bhp

 

Maximum Bhp

 

 

 

Maximum Amps

 

Maximum

 

Maximum

 

 

 

230 v

 

460 v

 

Watts

 

Efficiency

 

 

 

 

 

 

 

 

5

 

5.9

 

 

 

15.8

 

7.9

 

4,918

 

89.5

7.5

 

8.7

 

 

 

22.0

 

 

 

7,078

 

91.7

 

9.5

 

 

 

 

12.0

 

7,728

 

91.7

 

 

 

 

 

 

 

 

10

 

10.2

 

 

 

28.0

 

 

 

8,298

 

91.7

 

11.8

 

 

 

 

15.0

 

9,600

 

91.7

 

 

 

 

 

 

 

 

15

 

15.3

 

 

 

43.8

 

 

 

12,273

 

93.0

 

18.0

 

 

 

 

 

 

21.9

 

14,439

 

93.0

 

 

 

 

 

 

 

 

 

 

20

 

22.4

 

 

 

58.2

 

 

 

17,853

 

93.6

 

23.4

 

 

 

 

28.7

 

18,650

 

93.6

 

 

 

 

 

 

 

 

25

 

28.9

 

 

 

73.0

 

 

 

23,034

 

93.6

 

29.4

 

 

 

 

36.3

 

23,432

 

93.6

 

 

 

 

 

 

 

 

30

 

35.6

 

 

 

82.6

 

 

 

28,374

 

93.6

 

34.7

 

 

 

 

41.7

 

27,656

 

93.6

 

 

 

 

 

 

 

 

40

 

42.0

 

 

110.0

 

55.0

 

33,156

 

94.5

LEGEND

Bhp — Brake Horsepower

NOTES:

1.Extensive motor and electrical testing on the Carrier units has ensured that the full horsepower range of the motor can be utilized with confidence. Using your fan motors up to the

horsepower ratings shown in the Motor Limitations table will not result in nuisance tripping or premature motor failure. Unit war- ranty will not be affected.

2.All motors comply with Energy Policy Act (EPACT) Standards effective October 24, 1997.

Table 34 — Air Quality Limits

UNIT

UNIT

MINIMUM HEATING

MINIMUM HEATING

MINIMUM COOLING

MINIMUM COOLING

MAXIMUM

48AJ,AK,AW,A

48EJ,EK,EW,EY

AIRFLOW

AIRFLOW

AIRFLOW (VAV)

AIRFLOW

AIRFLOW

Y

 

(Low Heat)

(High Heat)

AT FULL LOAD OPERATION

(CV

 

020

024

5,900

6,100

4,000

6,000

10,000

025

028

5,900

6,100

5,000

7,500

12,500

027

030

5,900

6,100

5,400

8,100

13,500

030

034

5,900

6,100

6,000

9,000

15,000

035

038

7,600

10,100

7,000

10,500

17,500

040

044

7,600

10,100

8,000

12,000

20,000

048

7,600

10,100

9,000

13,500

22,500

050

7,600

10,100

10,000

15,000

22,500

054

11,000

14,700

10,000

15,000

25,000

058

11,000

14,700

11,000

16,500

27,000

060

064

11,000

14,700

12,000

18,000

27,000

068

11,000

14,700

13,000

19,500

27,000

LEGEND

CV — Constant Volume edb — Entering Dry Bulb ewb — Entering Wet Bulb VAV — Variable Air Volume

NOTE: Variable Air Volume units will operate down to 70 cfm/ton in Cooling mode. Performance at 70 cfm/ton is limited to unloaded operation and may be additionally limited to edb and ewb conditions.

79

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Contents Installation, Start-Up Service Instructions Instructions on Make Unit Duct ConnectionsRoof Curb 48AJ,AK020-030 and 48EJ,EK024-034 Units Roof Curb 48AJ,AK034-050 and 48EJ,EK038-048 Units Roof Curb 48AJ,AK060 and 48EJ,EK054-068 Units Page Base Unit Dimensions 48AJ,AK020-030 Base Unit Dimensions 48AJ,AK035-050 Base Unit Dimensions 48AJ,AK060 Base Unit Dimensions 48AW,AY020-030 Base Unit Dimensions 48AW,AY035-050 Base Unit Dimensions 48W,AY060 Base Unit Dimensions 48EJ,EK024-034 Base Unit Dimensions 48EJ,EK038-048 Base Unit Dimensions 48EJ,EK054-068 Base Unit Dimensions 48EW,EY024-034 Base Unit Dimensions 48EW,EY038-048 Base Unit Dimensions 48EW,EY054-068 AT Each Corner % 48EJ,EW,EK,EYD030 Rigging Weights 48AJ,AK,AW,AY UnitsAT Each Corner % 48EJ,EW,EK,EYD024 48EJ,EW,EK,EYD028Unit 48AJ,AK,AW,AY Physical Data 48AJ,AK,AW,AY UnitsQuantity Rows...Fins/in Unit 48EJ,EK,EW,EY Physical Data 48EJ,EK,EW,EY Units06D537 06EA250 06EA265 Quantity...Type Ckt 1, Ckt Operating Weights Air Distribution Thru-the-Bottom Evaporator Fan Motor DataCombustion Fan Housing Location Install Flue HoodNumber of Stages Model Number Position Heat Size Htstgtyp 48A,E Series Staged Gas ImplementationStages Thermistor Designations Supply-Air Thermistor Connections Indoor Air Quality Sensor Configuration Make Electrical Connections DIP CCNCOM SIORLA LRA Unbalanced 3-Phase Supply VoltageElectrical Data 48AJ,AK,AW,AY Units Min MaxQty 30.8/28.0 180.5/177.7 225/225 236.3/230.9 MCA Mocp EW,EY Electrical Data 48EJ,EK,EW,EY UnitsRange Exhaust FAN Motor FLA LRAFLA LRA MCA Mocp EW,EY 54.0 23.6 41.6 NEC FLARLA GND Ground Field Power Wiring ConnectionsIFC CCBEquip GNDOFC CCN IFC Pesc Carrier Comfort Network Indoor-Fan CircuitIndoor-Fan Relay Terminal Block Color Code Recommendations CCN Connection Approved Shielded CablesSpace Temperature Averaging Wiring Make Outdoor-Air Inlet AdjustmentsAdding Seal Strip to Top of Hood Sides Adding Seal Strip to Sides of Hood Top Mounting Flange Mounting Angle With Tabs Attached to Filter Track Assembly Differential Enthalpy Control and Sensor Control Control Point Curve APPROX. DEG Psychrometric Chart for Enthalpy ControlBarometric Relief Damper and Power Exhaust Mounting Details 80.5 79.5 48EJ,EK,EW,EY024-054 Unit Size120.5 119.5 48EJ,EK,EW,EY058-068 Motormaster III Sensor Location 48EJ,EK,EW,EY054-064 Side Return Air Conversion Field ModificationsSTART-UP In. wg Pressure Control Signal VFD SET PointParameter Group Default Value Carrier Default Program Parameter ValuesMotor Standard Efficiency High Efficiency Typical Factory Wiring Optional Field Wiring Building Pressure Signal Level Closed DIP Switch ConfigurationSetting OpenFan Performance, 48AJ,AK020-030 Vertical Discharge Units DIP Switch Factory SettingsAirflow 18,000 Fan Performance, 48AJ,AK035 Vertical Discharge Units16,000 17,00017,000 18,000 19,000 20,000 Fan Performance, 48AJ,AK040,050 Vertical Discharge Units19,000 20,000Fan Performance, 48AJ,AK060 Vertical Discharge Units 11,000 12,000 13,000 14,000 15,000 Fan Performance, 48AW,AY020-030 Horizontal Discharge Units17,000 18,000 Fan Performance, 48AW,AY035 Horizontal Discharge Units13,000 14,000 15,000 16,000 17,000 18,000 19,000 20,000 Fan Performance, 48AW,AY040,050 Horizontal Discharge Units16,000 17,000 18,000 19,000 20,000 26,000 27,000 Fan Performance, 48AW,AY060 Horizontal Discharge UnitsFan Performance, 48EJ,EK024,034 Vertical Discharge Units 15,000 16,000 17,000 18,000 19,000 20,000 Fan Performance, 48EJ,EK038,044 Vertical Discharge Units19,000 20,000 Available External Static Pressure in. wg Rpm Bhp 000 1066 1096 1125Rpm Bhp Fan Performance, 48EJ,EK048 Vertical Discharge Units000 1086 11.10 1114 11.61 1141 12.14 10,000 949 13.81 970 14.54 990 15.26 Fan Performance, 48EJ,EK054-068 Vertical Discharge Units20,000 21,000 22,000 23,000 24,000 25,000 26,000 27,000 Fan Performance, 48EW,EY054-068 Horizontal Discharge Units26,000 27,000 Available External Static Pressure in. wg 10,000 956 12.99 976 13.66 996 14.32ESP Airflow LOW Speed Medium Speed High SpeedAir Quality Limits Motor LimitationsSequence of Operation Software Control Link Points User Defined Set PointsPage COM Common Heat Interlock Relay WiringInput Description Staged Gas System ComponentsStage Gas System Inputs/Outputs Function LocationNavigator Display Menu Structure Navigator DisplayCondition Occupied Morning Temperature Software HeatVersion Enabled DEG. F ResetField-Supplied Smoke Detector Wiring Stages Smoke Control ModesCooling Capacity Staging Table, CV Units with 2 Compressors Device Pressurization Smoke Purge Evacuation Fire ShutdownService Typical Gas Heating Section Manufacturer Lubricant LubricationCondenser-Fan Adjustment Evaporator Fan Service and ReplacementBelt Tension Adjustment To adjust belt tension Evaporator-Fan Motor ReplacementCooling Charging Chart 48EJ,EK,EW,EY024-034 Gas Valve AdjustmentCooling Charging Chart 48EJ,EK,EW,EY054-068 Protective Devices 20 HP 208/230-3-60 Voltage WireIndoor Voltage Wire 06D-537 208/230-3-60 Following fan motors have twoTypical 48EK VAV 24-V Control Circuit Typical CV 24-V Control Circuit Typical 48EK VAV 115-V Control Circuit Typical 48EJ CV 115-V Control Circuit 101 102 Troubleshooting Typical Refrigerant Circuiting 48AJ,AK,AW,AY027,030 Typical Refrigerant Circuiting 48AJ,AK,AW,AY035 Typical Refrigerant Circuiting 48EJ,EK,EW,EY038,044 Typical Refrigerant Circuiting 48AJ,AK,AW,AY040,050 Typical Refrigerant Circuiting 48EJ,EK,EW,EY048 Typical Refrigerant Circuiting 48EJ,EK,EW,EY054 Typical Refrigerant Circuiting 48AJ,AK,AW,AY060 Typical Refrigerant Circuiting 48EJ,EK,EW,EY064 Typical Refrigerant Circuiting 48EJ,EK,EW,EY068 IGC Control Heating and Cooling Control Board LED Alarms IGC Control Board LED AlarmsIAQ O Channel Designations Base Module CVO Channel Designations Base Module VAV Terminal no AssignmentService Training START-UP Checklist General
Related manuals
Manual 64 pages 39.75 Kb Manual 36 pages 38.76 Kb

48EJ, 48AJ, 48AK, 48EK, 48AY020-060 specifications

The Carrier 48EJ, 48AW, 48EK, 48AJ, and 48EY024-068 are cutting-edge rooftop air conditioning units designed for commercial applications. These models are renowned for their reliability, energy efficiency, and innovative technologies aimed at providing optimal indoor comfort.

One of the standout features of these units is their advanced cooling and heating capabilities. They employ a multi-stage compressor system that allows for precise temperature control, accommodating various load requirements. This flexibility is particularly beneficial in commercial settings where the cooling load can fluctuate throughout the day.

Energy efficiency is paramount in today’s environmental landscape, and Carrier has ensured that these models meet stringent efficiency standards. They incorporate high-efficiency scroll compressors, which significantly reduce energy consumption while delivering powerful performance. The units are also equipped with variable speed fans that adjust airflow based on demand, further optimizing energy use.

In terms of construction, these rooftop units feature a robust design that enhances durability and longevity. The cabinet is constructed to withstand harsh weather conditions, ensuring reliable performance year-round. Additionally, the units are equipped with corrosion-resistant coatings, particularly useful in coastal environments where salt exposure can be a concern.

The Carrier 48EJ, 48AW, 48EK, 48AJ, and 48EY models utilize advanced controls and connectivity features, allowing for easy integration into building management systems. This connectivity enables remote monitoring and control, facilitating quick response to changing conditions and simplifying maintenance tasks.

Noise reduction is another key characteristic of these models. They are designed with sound-absorbing insulation and low-noise fan blades to ensure quiet operation, making them suitable for noise-sensitive environments such as schools and hospitals.

These units are also available with various options for air filtration and dehumidification. The use of high-efficiency air filters enhances indoor air quality by trapping dust, pollen, and other airborne particles. Enhanced dehumidification capabilities ensure that spaces remain comfortable even in humid conditions.

In conclusion, the Carrier 48EJ, 48AW, 48EK, 48AJ, and 48EY024-068 rooftop units are engineered to offer exceptional performance, energy efficiency, and durability. With their advanced technologies and user-friendly features, they stand out as reliable solutions for meeting diverse commercial cooling and heating needs, making them a popular choice for many businesses.