Table 1 — Physical Data — 48AJ,AK,AW,AY Units (cont)

UNIT 48AJ,AK,AW,AY

 

 

035

 

 

 

 

036

 

 

 

 

040

 

 

 

041

 

 

 

NOMINAL CAPACITY (tons)

 

35

 

 

 

 

35

 

 

 

 

40

 

 

 

40

 

 

 

BASE UNIT

 

 

 

 

 

 

 

 

 

 

 

See Operating Weights Table

 

 

 

 

 

 

 

 

 

OPERATING WEIGHT (lb)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COMPRESSOR

 

 

1…SR*812AT,

 

 

1…SR*812AT,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Quantity ... Type (Ckt 1/Ckt 2)

 

 

 

 

2…SR*942AT/2…SM125

2…SR*942AT/2…SM125

1…SR*942AT/2…SR*942AT

1…SR*942AT/2…SR*942AT

Number of Refrigerant Circuits

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

2

 

 

 

 

2

 

 

 

2

 

 

 

Oil (oz) (Ckt 1, Ckt 2)

 

 

 

Precharged

 

 

 

 

Precharged

 

 

 

 

Precharged

 

 

 

 

 

Precharged

 

REFRIGERANT TYPE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R-22

 

 

 

 

 

 

 

 

 

 

 

 

Operating Charge (lb-oz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Circuit 1

 

 

33-0

 

 

 

 

36-0

 

 

 

 

36-0

 

 

 

47-0

 

 

 

 

Circuit 2

 

 

38-0

 

 

 

 

58-0

 

 

 

 

47-0

 

 

 

47-0

 

 

 

CONDENSER COIL*

 

 

 

 

Internally Enhanced, 3/8Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins

 

Quantity

 

 

1

 

 

 

 

2

 

 

 

 

2

 

 

 

2

 

 

 

Rows ... Fins/in.

 

 

4 ... 15

 

 

 

 

 

2...15/4…15

 

 

2 ... 15 / 4 … 15

 

 

4...15/4…15

 

Total Face Area (sq ft)

 

33.3

 

 

 

 

66.7

 

 

 

 

66.7

 

 

 

66.7

 

 

 

CONDENSER FAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Propeller Type

 

 

 

 

 

 

 

 

 

 

 

 

Nominal Cfm

 

 

14,500

 

 

 

 

30,000

 

 

 

 

30,000

 

 

 

30,000

 

 

 

Quantity... Diameter (in.)

 

2 ... 30

 

 

 

 

4...30

 

 

 

 

4 ... 30

 

 

 

4...30

 

 

 

Motor Hp

 

 

1

 

 

 

 

1

 

 

 

 

1

 

 

 

1

 

 

 

EVAPORATOR COIL

 

 

 

 

 

 

 

Internally Enhanced Copper Tubes, Aluminum Plate Fins with Intertwined Circuits

 

 

 

 

 

 

Tube Size (in.)

 

 

1/2

 

 

 

 

1/2

 

 

 

 

1/2

 

 

 

1/2

 

 

 

Rows ... Fins/in.

 

 

6 ... 16

 

 

 

 

4...17

 

 

 

 

4 ... 16

 

 

 

4...17

 

 

 

Total Face Area (sq ft)

 

31.3

 

 

 

 

31.3

 

 

 

 

31.3

 

 

 

31.3

 

 

 

EVAPORATOR FAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Centrifugal Type

 

 

 

 

 

 

 

 

 

 

 

 

Quantity ... Size (in.)

 

 

 

 

2 ... 20 X 15

 

 

 

 

2...20 X 15

 

 

 

 

2 ... 20 X 15

 

 

 

 

 

2...20 X 15

 

Type Drive

 

 

 

 

Belt

 

 

 

 

Belt

 

 

 

 

Belt

 

 

 

 

 

Belt

 

Nominal Cfm

 

 

14,000

 

 

 

 

14,000

 

 

 

 

16,000

 

 

 

16,000

 

 

 

Motor Hp

 

15

 

 

20

 

 

25

15

 

 

20

 

 

25

15

 

 

20

 

25

15

 

 

20

 

 

25

Motor Frame Size

 

254T

 

 

256T

 

 

284T

254T

 

 

256T

 

 

284T

254T

 

 

256T

 

284T

254T

 

 

256T

 

 

284T

Motor Bearing Type

 

 

 

 

Ball

 

 

 

 

 

 

Ball

 

 

 

 

 

 

Ball

 

 

 

 

 

Ball

 

 

 

Maximum Allowable Rpm

 

1300

 

 

 

 

1300

 

 

 

 

1300

 

 

 

1300

 

 

 

Motor Pulley Pitch Diameter (in.)

5.1

 

 

5.7

 

 

6.2

5.3

 

 

5.7

 

 

7.5

5.3

 

 

5.7

 

7.5

5.3

 

 

5.7

 

 

7.5

Nominal Motor Shaft Diameter (in.)

15/8

 

 

15/8

 

 

17/8

15/8

 

 

15/8

 

 

17/8

15/8

 

 

15/8

 

17/8

15/8

 

 

15/8

 

 

17/8

Fan Pulley Pitch Diameter (in.)

8.7

 

 

8.7

 

 

8.7

9.5

 

 

9.5

 

 

11.1

9.5

 

 

9.5

 

11.1

9.5

 

 

9.5

 

 

11.1

Nominal Fan Shaft Diameter (in.)

 

 

 

115/16

 

 

 

 

 

 

115/16

 

 

 

 

 

 

115/16

 

 

 

 

 

115/16

 

 

 

Belt Quantity

 

2

 

 

2

 

 

2

2

 

 

2

 

 

2

2

 

 

2

 

2

2

 

 

2

 

 

2

 

 

 

 

 

 

 

 

 

Belt Type

 

5VX500

 

 

5VX530

 

 

5VX550

5VX530

 

 

5VX550

 

 

5VX590

5VX530

 

 

5VX550

 

5VX590

5VX530

 

 

5VX550

 

 

5VX590

Belt Length (in.)

 

50

 

 

53

 

 

55

53

 

 

55

 

 

59

53

 

 

55

 

59

53

 

 

55

 

 

59

Pulley Center Line Distance (in.)

15.0-17.9

 

15.0-17.9

 

15.0-17.9

15.0-17.9

 

 

15.0-17.9

 

14.6-17.6

15.0-17.9

 

15.0-17.9

 

14.6-17.6

15.0-17.9

 

15.0-17.9

 

 

14.6-17.6

Factory Speed Setting (rpm)

1005

 

 

1147

 

 

1247

976

 

 

1050

 

 

1182

976

 

 

1050

 

1182

976

 

 

1050

 

 

1182

FURNACE SECTION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Supply Line Pressure Range

 

 

 

 

 

 

 

 

 

 

5.0-in. wg min/13.5-in. wg max.

 

 

 

 

 

 

 

 

 

Rollout Switch Cutout

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Temp (F)†

 

 

225

 

 

 

 

225

 

 

 

 

225

 

 

 

225

 

 

 

Burner Orifice Diameter (in ...drill size)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Natural Gas

Std

 

.111 ... 34

 

 

 

 

.120...31

 

 

 

 

.120 ... 31

 

 

 

.120...31

 

 

 

 

Liquid Propane

Alt

 

.089 ... 43

 

 

 

 

.096...41

 

 

 

 

.096 ... 41

 

 

 

.096...41

 

 

 

Thermostat Heat Anticipator Setting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Stage 1 (amps)

 

 

0.24

 

 

 

 

0.1

 

 

 

 

0.24

 

 

 

0.1

 

 

 

 

Stage 2 (amps)

 

 

0.13

 

 

 

 

0.1

 

 

 

 

0.13

 

 

 

0.1

 

 

 

Gas Input (Btuh) Stage 1

 

262,500/394,000

 

300,000/600,000

 

 

300,000/600,000

 

300,000/600,000

 

(Low Heat/High Heat)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Stage 2

 

350,000/525,000

 

400,000/800,000

 

 

400,000/800,000

 

400,000/800,000

 

(Low Heat/High Heat)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Efficiency (Steady State) (%)

 

82

 

 

 

 

82

 

 

 

 

82

 

 

 

82

 

 

 

Temperature Rise Range

 

15-45/35-65

 

 

 

 

10-40/30-60

 

 

 

 

10-40/3 -60

 

 

 

10-40/30-60

 

 

 

Manifold Pressure

(in. wg)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Natural Gas

Std

 

3.5

 

 

 

 

3.5

 

 

 

 

3.5

 

 

 

3.5

 

 

 

 

Liquid Propane

Alt

 

3.5

 

 

 

 

3.5

 

 

 

 

3.5

 

 

 

3.5

 

 

 

Gas Valve Quantity

 

 

2

 

 

 

 

2

 

 

 

 

2

 

 

 

2

 

 

 

HIGH-PRESSURE SWITCH (psig)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cutout

 

 

426

 

 

 

 

426

 

 

 

 

426

 

 

 

426

 

 

 

Reset (Auto.)

 

 

320

 

 

 

 

320

 

 

 

 

320

 

 

 

320

 

 

 

MIXED-AIR FILTERS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Quantity ... Size (in.) Standard

 

10 ... 20 x 24 x 2

 

 

10...20 x 24 x 2

 

 

10 ... 20 x 24 x 2

 

10...20 x 24 x 2

 

 

 

Pleated

 

5 ... 20 x 20 x 4

 

 

5...20 x 20 x 4

 

 

5 ... 20 x 20 x 4

 

5...20 x 20 x 4

 

 

 

 

 

5 ... 20 x 24 x 4

 

 

5...20 x 20 x 4

 

 

5 ... 20 x 24 x 4

 

5...20 x 20 x 4

 

OUTDOOR-AIR FILTERS

 

 

 

 

 

 

 

 

 

 

 

 

 

8...16 x 25 x 2

 

 

 

 

 

 

 

 

 

 

 

 

Quantity...Size (in.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4...20 x 25 x 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER EXHAUST

 

Direct Drive, Single-Phase Motors (Factory-Wired for High Speed Operation), Forward-Curved Fan Wheels with Backdraft Dampers on Each Fan Housing

Motor, Quantity...Hp

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4...1

 

 

 

 

 

 

 

 

 

 

 

 

Fan, Diameter...Width (in.)

 

 

 

 

 

 

 

 

 

 

 

 

 

11 x 10

 

 

 

 

 

 

 

 

 

 

 

 

 

LEGEND

 

 

 

 

 

 

 

 

 

 

 

*Sizes 020-040: Circuit 1 uses the lower portion of condenser coil, Circuit 2 uses the upper

Al

Aluminum

 

 

 

 

 

 

 

 

 

 

 

portion.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sizes 041-060: Circuit 1 uses the left condenser coil, Circuit 2 the right. All units have

Cu

Copper

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

intertwined evaporator coils.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

†Rollout switch is manual reset.

14

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Carrier 48AJ installation instructions 035 036 040 041 Nominal Capacity tons

48AJ 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.