Carrier 48EW, 48EY024-068, 48AW, 48AY020-060, 48EK, 48AK, 48AJ, 48EJ 06D537 06EA250 06EA265

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Table 1B — Physical Data — 48EJ,EK,EW,EY Units (cont)

UNIT 48EJ,EK,EW,EY

 

 

034D/E

 

 

 

044D/E

 

 

 

 

048D/E

 

NOMINAL CAPACITY (tons)

 

35

 

 

 

 

40

 

 

 

 

 

 

45

 

 

 

OPERATING WEIGHT (lb)

 

 

 

 

 

 

For Operating Weights see Table 2.

 

 

 

 

 

 

 

COMPRESSOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Type Ckt 1

 

 

 

06D537

 

 

 

06EA250

 

 

 

 

06EA265

 

Ckt 2

 

 

 

06D537

 

 

 

06EA250

 

 

 

 

06EA250

 

Number of Refrigerant Circuits

 

2

 

 

 

 

2

 

 

 

 

 

 

2

 

 

 

Oil (oz) (Ckt 1, Ckt 2)

 

 

 

115 ea.

 

 

 

224 ea.

 

 

 

 

304, 224

 

 

 

REFRIGERANT TYPE

 

 

 

 

 

 

 

 

 

R-22

 

 

 

 

 

 

 

 

Operating Charge (lb-oz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Circuit 1*

 

 

34-0

 

 

 

 

35-0

 

 

 

 

 

 

41-0

 

 

 

Circuit 2

 

 

34-0

 

 

 

 

35-0

 

 

 

 

 

 

41-0

 

 

 

CONDENSER COIL

 

 

 

Cross-Hatched 3/8Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins

 

Quantity

 

 

2

 

 

 

 

2

 

 

 

1

 

 

1

 

Rows...Fins/in.

 

 

4...15

 

 

 

 

4...15

 

 

 

4...15

 

 

3...15

Total Face Area (sq ft)

 

58.3

 

 

 

 

58.3

 

 

 

 

 

 

66.7

 

 

 

CONDENSER FAN

 

 

 

 

 

 

 

 

 

Propeller Type

 

 

 

 

 

 

 

 

Nominal Cfm

 

 

27,064

 

 

 

 

27,064

 

 

 

 

 

 

27,064

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Quantity...Diameter (in.)

 

4...30

 

 

 

 

4...30

 

 

 

 

 

 

4...30

 

 

 

Motor Hp (1075 Rpm)

 

1

 

 

 

 

1

 

 

 

 

 

 

1

 

 

 

EVAPORATOR COIL

 

 

 

 

 

 

Cross-Hatched

3/8Copper Tubes, Aluminum Plate Fins, Intertwined Circuits

 

 

 

 

Rows...Fins/in.

 

 

3...15

 

 

 

 

3...15

 

 

 

 

 

 

4...15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total Face Area (sq ft)

 

34.7

 

 

 

 

34.7

 

 

 

 

 

 

34.7

 

 

 

EVAPORATOR FAN

 

 

 

 

 

 

 

 

 

Centrifugal Type

 

 

 

 

 

 

 

 

Quantity...Size (in.)

 

 

 

2...20x15

 

 

 

2...20x15

 

 

 

 

2...20x15

 

Type Drive

 

 

 

Belt

 

 

 

Belt

 

 

 

 

Belt

 

Nominal Cfm

 

 

14,000

 

 

 

 

16,000

 

 

 

 

 

 

18,000

 

 

 

Motor Hp

 

10

 

15†

 

 

20

15

 

20†

 

 

25

20

 

 

25†

 

 

30

Motor Frame Size (Standard)

S215T

 

D254T

 

 

S256T

D254T

 

S256T

 

 

S284T

S256T

 

 

S284T

 

 

S286T

(High Efficiency)

 

S215T

 

S254T

 

 

S256T

S254T

 

S256T

 

 

S284T

S256T

 

 

S284T

 

 

S286T

Motor Bearing Type

 

 

 

Ball

 

 

 

 

 

Ball

 

 

 

 

 

 

Ball

 

 

 

Maximum Allowable Rpm

 

1200

 

 

 

 

1200

 

 

 

 

 

 

1200

 

 

 

Motor Pulley Pitch Diameter

6.1

 

5.3

 

 

5.7

5.3

 

5.7

 

 

7.5

6.3

 

 

8.1

 

 

7.5

Nominal Motor Shaft Diameter (in.)

13/8

 

15/8

 

 

15/8

15/8

 

15/8

 

 

17/8

15/8

 

 

17/8

 

 

17/8

Fan Pulley Pitch Diameter (in.)

13.7

 

9.5

 

 

9.5

9.5

 

9.5

 

 

11.1

11.1

 

 

12.5

 

 

11.1

Nominal Fan Shaft Diameter (in.)

 

 

115/16

 

 

 

 

 

115/16

 

 

 

 

 

 

115/16

 

 

 

Belt, Quantity...Type

 

1...5VX610

 

2...5VX530

 

 

2...5VX550

2...5VX530

 

2...5VX550

 

 

2...5VX590

2...5VX570

 

 

2...5VX630

 

 

2...5VX590

 

 

 

 

 

 

 

Belt, Length (in.)

 

61

 

53

 

 

55

53

 

55

 

 

59

57

 

 

63

 

 

59

Pulley Center Line Distance (in.)

15.6-18.4

 

15.0

 

-17.9

15.0

 

-17.9

 

 

14.6-17.6

15.0-17.9

 

 

14.6-17.6

Factory Speed Setting (rpm)

779

 

976

 

 

1050

976

 

1050

 

 

1182

993

 

 

1134

 

 

1182

FURNACE SECTION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rollout Switch Cutout Temp (F)**

 

225

 

 

 

 

225

 

 

 

 

 

 

225

 

 

 

Burner Orifice Diameter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(in. ...drill size)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Natural Gas

Std

 

.120...31

 

 

 

 

.120...31

 

 

 

 

 

 

.120...31

 

 

 

Liquid Propane

Alt

 

.096...41

 

 

 

 

.096...41

 

 

 

 

 

 

.096...41

 

 

 

Thermostat Heat Anticipator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Setting (amps)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Stage 1

 

 

0.1

 

 

 

 

0.1

 

 

 

 

 

 

0.1

 

 

 

Stage 2

 

 

0.1

 

 

 

 

0.1

 

 

 

 

 

 

0.1

 

 

 

Gas Input (Btuh)

Stage 1 Low

 

303,500

 

 

 

 

303,500

 

 

 

 

 

 

303,500

 

 

 

 

High

 

607,000

 

 

 

 

607,000

 

 

 

 

 

 

607,000

 

 

 

 

Stage 2 Low

 

400,000

 

 

 

 

400,000

 

 

 

 

 

 

400,000

 

 

 

 

High

 

800,000

 

 

 

 

800,000

 

 

 

 

 

 

800,000

 

 

 

Efficiency (Steady State) (%)

 

82

 

 

 

 

82

 

 

 

 

 

 

82

 

 

 

Temperature Rise Range

 

10-40/30-60

 

 

 

 

10-40/30-60

 

 

 

 

 

 

10-40/30-60

 

 

 

Gas Pressure to Unit Range (in. wg)

 

5-13.5

 

 

 

 

5-13.5

 

 

 

 

 

 

5-13.5

 

 

 

Manifold Pressure (in. wg)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Natural Gas

Std

 

3.5

 

 

 

 

3.5

 

 

 

 

 

 

3.5

 

 

 

Liquid Propane

Alt

 

3.5

 

 

 

 

3.5

 

 

 

 

 

 

3.5

 

 

 

Gas Valve Quantity

 

 

2

 

 

 

 

2

 

 

 

 

 

 

2

 

 

 

Field Gas Connection Size

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(in.-FPT)

 

 

1.5

 

 

 

 

1.5

 

 

 

 

 

 

1.5

 

 

 

HIGH-PRESSURE SWITCH (psig)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cutout

 

 

426

 

 

 

 

426

 

 

 

 

 

 

426

 

 

 

Reset (Auto.)

 

 

320

 

 

 

 

320

 

 

 

 

 

 

320

 

 

 

LOW-PRESSURE SWITCH (psig)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cutout

 

 

7

 

 

 

 

7

 

 

 

 

 

 

7

 

 

 

Reset (Auto.)

 

 

22

 

 

 

 

22

 

 

 

 

 

 

22

 

 

 

RETURN-AIR FILTERS (W x H x T)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Quantity...Size (in.)

 

 

 

10...20 x 24 x 2

 

 

 

10...20 x 24 x 2

 

 

 

 

10...20 x 24 x 2

 

OUTDOOR-AIR FILTERS

 

 

8...16 x 25

 

 

 

8...16 x 25

 

 

 

 

8...16 x 25

 

Quantity...Size (in.)

 

 

 

4...20 x 25

 

 

 

4...20 x 25

 

 

 

 

4...20 x 25

 

POWER EXHAUST

 

 

 

Direct Drive, 3-Speed, Single-Phase Motor (Factory-Wired for High Speed) and Forward Curved Fan

 

Motor, Quantity...Hp

 

 

 

 

 

 

 

 

4...1

 

 

 

 

 

 

 

 

 

 

Fan, Diameter...Width (in.)

 

 

 

 

 

 

 

11...10

 

 

 

 

 

 

 

 

 

 

*Sizes 024-034: Circuit 1 uses the lower portion of condenser coil, Circuit 2 uses the upper portion.

Sizes 038-048: Circuit 1 uses the left condenser coil, Circuit 2 the right. All units have intertwined evaporator coils. †Motor and drive shown will deliver approximately 2.5 in. wg net external static. For more information, see Table 3. **Rollout switch is manual reset.

NOTE: High heat is for 48EJ,EW only.

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Contents Installation, Start-Up Service Instructions Make Unit Duct Connections Instructions onRoof 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 % Rigging Weights 48AJ,AK,AW,AY Units AT Each Corner % 48EJ,EW,EK,EYD02448EJ,EW,EK,EYD028 48EJ,EW,EK,EYD030Physical Data 48AJ,AK,AW,AY Units Unit 48AJ,AK,AW,AYQuantity Rows...Fins/in Physical Data 48EJ,EK,EW,EY Units Unit 48EJ,EK,EW,EY06D537 06EA250 06EA265 Quantity...Type Ckt 1, Ckt Operating Weights Evaporator Fan Motor Data Air Distribution Thru-the-BottomInstall Flue Hood Combustion Fan Housing Location48A,E Series Staged Gas Implementation Number of Stages Model Number Position Heat Size HtstgtypStages Thermistor Designations Supply-Air Thermistor Connections Indoor Air Quality Sensor Configuration Make Electrical Connections CCN COMSIO DIPUnbalanced 3-Phase Supply Voltage Electrical Data 48AJ,AK,AW,AY UnitsMin Max RLA LRAQty 30.8/28.0 180.5/177.7 225/225 236.3/230.9 Electrical Data 48EJ,EK,EW,EY Units Range Exhaust FAN MotorFLA LRA MCA Mocp EW,EYFLA LRA MCA Mocp EW,EY 54.0 23.6 41.6 FLA NECRLA Field Power Wiring Connections GND GroundCCB EquipGND IFCOFC Carrier Comfort Network Indoor-Fan Circuit CCN IFC PescIndoor-Fan Relay Terminal Block CCN Connection Approved Shielded Cables Color Code RecommendationsMake Outdoor-Air Inlet Adjustments Space Temperature Averaging WiringAdding 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 Psychrometric Chart for Enthalpy Control Control Control Point Curve APPROX. DEGBarometric Relief Damper and Power Exhaust Mounting Details Unit Size 80.5 79.5 48EJ,EK,EW,EY024-054120.5 119.5 48EJ,EK,EW,EY058-068 Motormaster III Sensor Location 48EJ,EK,EW,EY054-064 Field Modifications Side Return Air ConversionSTART-UP Pressure Control Signal VFD SET Point In. wgCarrier Default Program Parameter Values Parameter Group Default ValueMotor Standard Efficiency High Efficiency Typical Factory Wiring Optional Field Wiring Building Pressure Signal Level DIP Switch Configuration SettingOpen ClosedDIP Switch Factory Settings Fan Performance, 48AJ,AK020-030 Vertical Discharge UnitsAirflow Fan Performance, 48AJ,AK035 Vertical Discharge Units 16,00017,000 18,000Fan Performance, 48AJ,AK040,050 Vertical Discharge Units 19,00020,000 17,000 18,000 19,000 20,000Fan Performance, 48AJ,AK060 Vertical Discharge Units Fan Performance, 48AW,AY020-030 Horizontal Discharge Units 11,000 12,000 13,000 14,000 15,000Fan Performance, 48AW,AY035 Horizontal Discharge Units 17,000 18,00013,000 14,000 15,000 16,000 17,000 18,000 Fan Performance, 48AW,AY040,050 Horizontal Discharge Units 19,000 20,00016,000 17,000 18,000 19,000 20,000 Fan Performance, 48AW,AY060 Horizontal Discharge Units 26,000 27,000Fan Performance, 48EJ,EK024,034 Vertical Discharge Units Fan Performance, 48EJ,EK038,044 Vertical Discharge Units 19,000 20,000 Available External Static Pressure in. wgRpm Bhp 000 1066 1096 1125 15,000 16,000 17,000 18,000 19,000 20,000Fan Performance, 48EJ,EK048 Vertical Discharge Units Rpm Bhp000 1086 11.10 1114 11.61 1141 12.14 Fan Performance, 48EJ,EK054-068 Vertical Discharge Units 10,000 949 13.81 970 14.54 990 15.26Fan Performance, 48EW,EY054-068 Horizontal Discharge Units 26,000 27,000 Available External Static Pressure in. wg10,000 956 12.99 976 13.66 996 14.32 20,000 21,000 22,000 23,000 24,000 25,000 26,000 27,000Airflow LOW Speed Medium Speed High Speed ESPMotor Limitations Air Quality LimitsSequence of Operation User Defined Set Points Software Control Link PointsPage Heat Interlock Relay Wiring COM CommonStaged Gas System Components Stage Gas System Inputs/OutputsFunction Location Input DescriptionNavigator Display Navigator Display Menu StructureOccupied Morning Temperature Software Heat Version EnabledDEG. F Reset ConditionField-Supplied Smoke Detector Wiring Smoke Control Modes Cooling Capacity Staging Table, CV Units with 2 CompressorsDevice Pressurization Smoke Purge Evacuation Fire Shutdown StagesService Typical Gas Heating Section Lubrication Manufacturer LubricantEvaporator Fan Service and Replacement Belt Tension Adjustment To adjust belt tensionEvaporator-Fan Motor Replacement Condenser-Fan AdjustmentGas Valve Adjustment Cooling Charging Chart 48EJ,EK,EW,EY024-034Cooling Charging Chart 48EJ,EK,EW,EY054-068 Protective Devices Voltage Wire Indoor Voltage Wire06D-537 208/230-3-60 Following fan motors have two 20 HP 208/230-3-60Typical 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 IGC Control Board LED Alarms Control Board LED AlarmsO Channel Designations Base Module CV O Channel Designations Base Module VAVTerminal no Assignment IAQService 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.