Carrier EY024-048, 48EJ, EW, EK installation instructions 4442/4602 4668/4828 4955/5115

Page 11

Table 1 Ð Physical Data (cont)

UNIT 48EJ,EK,EW,EY

 

 

 

038D/E

 

 

044D/E

 

 

048D/E

 

 

NOMINAL CAPACITY (tons)

 

 

35

 

 

40

 

 

45

 

 

OPERATING WEIGHT (lb)*

 

 

 

 

 

 

 

 

 

 

 

Unit

 

 

 

 

 

 

 

 

 

 

 

 

Al/Al² (Lo Heat/Hi Heat)

 

 

4442/4602

 

 

4668/4828

 

 

4955/5115

 

 

Al/Cu² (Lo Heat/Hi Heat)

 

 

4727/4887

 

 

4953/5113

 

 

5335/5495

 

 

Roof Curb (14-in. curb)

 

 

410

 

 

410

 

 

410

 

 

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¤8 Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins

 

 

Quantity

 

 

 

2

 

 

2

 

1

 

1

Rows...Fins/in.

 

 

 

3...15

 

 

3...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¤8 Copper 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

15²²

20

15

20²²

25

20

25²²

 

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

5.9

 

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...5VX650

2...5VX530

2...5VX550

2...5VX530

2...5VX550

2...5VX590

2...5VX570

2...5VX630

 

2...5VX610

Belt, Length (in.)

 

 

65

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 Ori®ce 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

 

300,000

 

 

300,000

 

 

300,000

 

 

 

 

High

 

600,000

 

 

600,000

 

 

600,000

 

 

 

Stage 2

Low

 

400,000

 

 

400,000

 

 

400,000

 

 

Efficiency (Steady State) (%)

High

 

800,000

 

 

800,000

 

 

800,000

 

 

 

 

82

 

 

82

 

 

82

 

 

Temperature Rise Range

 

 

10-40/30-60

 

 

10-40/30-60

 

 

10-40/30-60

 

 

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

 

 

OUTDOOR-AIR FILTERS

 

 

 

 

 

8...16 × 25

 

 

 

 

 

Quantity...Size (in.)

 

 

 

 

 

 

4...20 × 25

 

 

 

 

 

RETURN-AIR FILTERS

 

 

 

 

 

 

 

 

 

 

 

 

Quantity...Size (in.)

 

 

 

10...20x24x2

 

 

10...20x24x2

 

 

10...20x24x2

 

 

POWER EXHAUST

 

 

 

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

 

 

Motor, Quantity...Hp

 

 

 

4...1

 

 

4...1

 

 

4...1

 

 

Fan, Diameter... Width (in.)

 

 

11...10

 

 

11...10

 

 

11...10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEGEND

Al Ð Aluminum

Cu Ð Copper

*Weight of unit does not include variable frequency drive (VFD) barometric relief, or power exhaust. If a VFD is installed, add the VFD weight in the table at right.

²Evaporator coil ®n material/condenser coil ®n material.

**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.

²²Motor and drive shown will deliver approximately 2.5 in. wg net external static. See Table 2 for more information.

Rollout switch is manual reset.

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

VFD

 

VFD WEIGHTS (lb)

 

(Hp)

208/230 v

 

460 v

575 v

 

 

 

 

 

5

20

 

22

60

7.5

51

 

37

64

 

 

 

 

 

10

51

 

61

64

 

 

 

 

 

15

61

 

63

109

 

 

 

 

 

20

63

 

111

109

 

 

 

 

 

25

105

 

112

174

 

 

 

 

 

30

172

 

118

180

 

 

 

 

 

11

Image 11
Contents Installation, Start-Up Service Instructions Instructions on Field Fabricate DuctworkDegrees and Inches Unit Leveling Tolerances DimensionsRoof Curb Sizes Size WeightUnit Operating 48EJE044 Ft-in 48EJ,EKD03848EJE038 48EJ,EKD044Base Unit Dimensions, 48EW,EY024-034 Base Unit Dimensions, 48EW,EY038-048 48EJ,EK,EW,EYD038 Unit Weight 48EJ,EK,EW,EYD02448EJ,EK,EW,EYD028 48EJ,EK,EW,EYD030 48EJ,EK,EW,EYD034Unit 48EJ,EK,EW,EY Physical Data4442/4602 4668/4828 4955/5115 Air Distribution Ð Thru-the-Bottom Combustion Fan Housing Location VAV Unit Configuration Default Cooling Default HeatingField Control Remote Start/Stop Make Electrical Connections LED CCNSIO FLA LRA MCA Mocp Electrical DataRLA LRA NEC FLA LRAFLA HacrMinimum Circuit Amps Qty044 Heating, Air ConditioningTerminal Block GND Ð GroundPEC DIP8772 CCN Connection Approved Shielded CablesManufacturer Cable Part no 2413 orWhite Make Outdoor-Air Inlet AdjustmentsColor Code Recommendations REDAdding Seal Strip to Top of Hood Sides Adding Foam Strip to Hood Side Mounting Angle With Tabs Attached to Filter Track Assembly Psychrometric Chart for Enthalpy Control Barometric Relief Damper and Power Exhaust Mounting Details Pressure Transducer Locations START-UP SET Point VFD Supply Air Pressure Set PointPressure Control VFD Vdc Direct Digital Controls DIP Switch ConguraPotentiometer Signal Levels Building Pressure Signal LevelDIP Switch Factory Settings Power Exhaust Default Set PointsDIP Switch Conguration Airflow 19,000 16,00017,000 18,000528 572 615 656 695 733 769 805 Standard Efficiency Motors Fan Performance Ð Power ExhaustMotor Limitations ESPAir Quantity Limits Sequence of OperationUser Dened Set Points GAS HEATING, Variable AIR Volume VAV Units HIR DEG. F ResetCOM Device Pressurization Smoke Purge Evacuation Fire Shutdown Smoke Control ModesCompressor Cooling Capacity Staging Table, CV Units With 2 CompressorsStages Manufacturer Lubricant LubricationTypical Gas Heating Section Evaporator Fan Service and ReplacementCondenser-Fan Adjustment Evaporator-Fan Motor ReplacementProtective Devices Belt Tension AdjustmentGas Valve Tran AHAIFC IfcbTypical Power Schematic 48EJ,EK,EW,EY024-034 208/230-3-60 Typical VAV 115-v Control Circuit Typical CV 115-v Control Circuit Typical VAV 24-v Control Circuit Typical CV 24-v Control Circuit Troubleshooting Typical Refrigerant Circuiting 48EJ,EK,EW,EY038,044 Typical Refrigerant Circuiting 48EJ,EK,EW,EY048 IGC Control Heating and Cooling Control Board LED Alarms IGC Control Board LED AlarmsSPT I/O Channel Designations Base Module Ð CVI/O Channel Designations Base Module Ð VAV Terminal no AssignmentPackaged Service Training START-UP Checklist General
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Manual 118 pages 46.64 Kb

EW, EY024-048, EK, 48EJ 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.