Carrier 48AJ installation instructions 050 051 060 Nominal Capacity tons

Page 15

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

UNIT 48AJ,AK,AW,AY

 

 

050

 

 

 

 

 

 

 

051

 

 

 

 

 

 

 

 

 

060

 

 

NOMINAL CAPACITY (tons)

 

50

 

 

 

 

 

 

 

50

 

 

 

 

 

 

 

 

 

60

 

 

BASE UNIT

 

 

 

 

 

 

 

 

 

 

 

 

 

See Operating Weights Table

 

 

 

 

 

 

 

 

OPERATING WEIGHT (lb)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COMPRESSOR

 

2…SM125/1…SM125,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1..SM160,1..SM175/

 

 

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

 

 

 

2…SM125/2…SM125

 

 

 

 

 

 

 

 

 

 

1…SM175

 

 

 

 

 

 

 

 

 

1..SM160,1..SM175

 

 

Number of Refrigerant Circuits

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

2

 

 

Oil (oz) (Ckt 1, Ckt 2)

 

 

 

Precharged

 

 

 

 

 

 

 

Precharged

 

 

 

 

 

 

Precharged

 

 

REFRIGERANT TYPE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R-22

 

 

 

 

 

 

 

 

 

 

 

Operating Charge (lb-oz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Circuit 1

 

 

64-4

 

 

 

 

 

 

 

98-0

 

 

 

 

 

 

 

 

 

81-0

 

 

Circuit 2

 

 

58-8

 

 

 

 

 

 

 

98-0

 

 

 

 

 

 

 

 

 

81-0

 

 

CONDENSER COIL*

 

 

 

 

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

 

 

Quantity

 

 

2

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

2

 

 

Rows ... Fins/in.

 

 

4 ... 15

 

 

 

 

 

 

 

 

 

4…15

 

 

 

 

 

 

 

4…15

 

 

Total Face Area (sq ft)

 

66.7

 

 

 

 

 

 

 

100

 

 

 

 

 

 

 

 

 

100

 

 

CONDENSER FAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Propeller Type

 

 

 

 

 

 

 

 

 

 

 

Nominal Cfm

 

 

25,600

 

 

 

 

 

 

 

38,400

 

 

 

 

 

 

 

38,400

 

 

Quantity... Diameter (in.)

 

4 ... 30

 

 

 

 

 

 

 

6...30

 

 

 

 

 

 

 

6 ... 30

 

 

Motor Hp

 

 

1

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

1

 

 

EVAPORATOR COIL

 

 

 

 

 

 

 

 

Internally Enhanced Copper Tubes, Aluminum Plate Fins with Intertwined Circuits

 

 

 

 

 

Tube Size (in.)

 

 

1/2

 

 

 

 

 

 

 

1/2

 

 

 

 

 

 

 

 

 

1/2

 

 

Rows ... Fins/in.

 

 

6 ... 16

 

 

 

 

 

 

 

4...17

 

 

 

 

 

 

 

4 ... 17

 

 

Total Face Area (sq ft)

 

31.3

 

 

 

 

 

 

 

48.1

 

 

 

 

 

 

 

 

 

48.1

 

 

EVAPORATOR FAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Centrifugal Type

 

 

 

 

 

 

 

 

 

 

 

Quantity ... Size (in.)

 

 

 

2 ... 20 X 15

 

 

 

 

 

 

 

3...20 X 15

 

 

 

 

 

 

3 ... 20 X 15

 

 

Type Drive

 

 

 

 

Belt

 

 

 

 

 

 

 

Belt

 

 

 

 

 

 

 

Belt

 

 

Nominal Cfm

 

 

20,000

 

 

 

 

 

 

 

20,000

 

 

 

 

 

 

 

24,000

 

 

Motor Hp

 

20

 

 

25

 

 

30

 

20

 

25

 

 

30

 

 

40

 

40

 

25

 

30

 

 

40

 

40

 

 

 

 

 

 

 

 

 

 

 

(High Eff.)

 

(Prem. Eff.)

 

 

 

 

(High Eff.)

 

(Prem. Eff.)

Motor Frame Size

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

256T

 

 

284T

 

 

286T

 

256T

 

284T

 

 

286T

 

 

324T

 

324T

 

284T

 

286T

 

 

324T

 

324T

Motor Bearing Type

 

 

 

 

Ball

 

 

 

 

 

 

 

 

 

Ball

 

 

 

 

 

 

 

 

 

 

Ball

 

 

Maximum Allowable Rpm

 

1300

 

 

 

 

 

 

 

1200

 

 

 

 

 

 

 

 

 

1200

 

 

Motor Pulley Pitch Diameter (in.)

5.7

 

 

6.2

 

 

6.7

 

5.9

 

5.3

 

 

5.9

 

 

6.5

 

9.5

 

5.3

 

5.9

 

 

6.5

 

9.5

Nominal Motor Shaft Diameter (in.)

15/8

 

 

17/8

 

 

17/8

 

15/8

 

17/8

 

 

17/8

 

 

21/8

 

21/8

 

17/8

 

17/8

 

 

21/8

 

21/8

Fan Pulley Pitch Diameter (in.)

9.5

 

 

9.5

 

 

9.5

 

11.1

 

9.1

 

 

9.5

 

 

9.5

 

13.7

 

9.1

 

9.5

 

 

9.5

 

13.7

Nominal Fan Shaft Diameter (in.)

 

 

 

115/16

 

 

 

 

 

 

 

 

 

115/16

 

 

 

 

 

 

 

 

 

1

 

15/16

 

 

Belt Quantity

 

2

 

 

2

 

 

2

 

2

 

3

 

 

3

 

 

3

 

2

 

3

 

3

 

 

3

 

2

 

 

 

 

 

 

 

 

 

 

Belt Type

 

5VX550

 

 

5VX570

 

 

5VX570

 

5VX560

 

5VX530

 

 

5VX550

 

 

5VX570

 

5VX650

 

5VX530

 

5VX550

 

 

5VX570

 

5VX650

Belt Length (in.)

 

55

 

 

57

 

 

57

 

56

 

53

 

 

55

 

 

57

 

65

 

53

 

55

 

 

57

 

65

Pulley Center Line Distance (in.)

15.0-17.9

 

14.6-17.6

 

14.6-17.6

15.0-17.9

 

15.2-17.5

 

14.7-17.2

 

14.2-17.0

 

14.2-17.0

15.2-17.5

 

14.7-17.2

 

14.2-17.0

 

14.2-17.0

Factory Speed Setting (rpm)

1061

 

 

1154

 

 

1249

 

930

 

1019

 

 

1086

 

 

1197

 

1214

 

1019

 

1086

 

 

1197

 

1214

FURNACE SECTION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Supply Line Pressure Range

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Stage 1 (amps)

 

 

0.24

 

 

 

 

 

 

 

0.1

 

 

 

 

 

 

 

 

 

0.36

 

 

Stage 2 (amps)

 

 

0.13

 

 

 

 

 

 

 

0.1

 

 

 

 

 

 

 

 

 

0.13

 

 

Gas Input (Btuh) Stage 1

300,000/600,000

 

 

 

 

582,000/873,000

 

 

 

 

582,000/873,000

 

 

 

(Low Heat/High Heat)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Stage 2

400,000/800,000

 

 

 

 

776,000/1,164,000

 

 

 

 

776,000/1,164,000

 

 

 

(Low Heat/High Heat)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Efficiency (Steady State) (%)

 

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

 

 

 

 

 

 

 

3.3

 

 

 

 

 

 

 

 

 

3.3

 

 

 

Liquid Propane

Alt

 

3.5

 

 

 

 

 

 

 

3.3

 

 

 

 

 

 

 

 

 

3.3

 

 

Gas Valve Quantity

 

 

2

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

3

 

 

HIGH-PRESSURE SWITCH (psig)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cutout

 

 

426

 

 

 

 

 

 

 

426

 

 

 

 

 

 

 

 

 

426

 

 

Reset (Auto.)

 

 

320

 

 

 

 

 

 

 

320

 

 

 

 

 

 

 

 

 

320

 

 

MIXED-AIR FILTERS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Quantity ... Size (in.) Standard

10 ... 20 x 24 x 2

 

 

 

 

16...20 x 24 x 2

 

 

 

 

 

16 ... 20 x 24 x 2

 

 

 

 

Pleated

 

5 ... 20 x 20 x 4

 

 

 

 

 

 

8...20 x 20 x 4

 

 

 

 

 

8 ... 20 x 20 x 4

 

 

 

 

 

 

5 ... 20 x 24 x 4

 

 

 

 

 

 

8...20 x 24 x 4

 

 

 

 

 

8 ... 20 x 24 x 4

 

 

OUTDOOR-AIR FILTERS

 

8...16 x 25 x 2

 

 

 

 

 

 

 

 

 

 

 

 

12...16 x 25 x 2

 

 

 

 

 

 

 

 

Quantity...Size (in.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4...20 x 25 x 2

 

 

 

 

 

 

 

 

 

 

 

 

6...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

 

 

 

 

 

 

 

 

 

 

 

 

 

6...1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fan, Diameter...Width (in.)

 

 

 

11 x 10

 

 

 

 

 

 

 

 

 

 

 

 

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.

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Contents Installation Instructions Instructions on Make Unit Duct ConnectionsRoof Curb 48AJ,AK020-035 Units Roof Curb 48AJ,AK036-050 Units Roof Curb 48AJ,AK051 and 060 Units A48-8235 Base Unit Dimensions 48AJ,AK020-035A48-8236 Base Unit Dimensions 48AJ,AK036-050Base Unit Dimensions 48AJ,AK051 A48-8380 Base Unit Dimensions 48AW,AY020-035Base Unit Dimensions 48AW,AY036-050 A48-8240 Base Unit Dimensions 48AW,AY051A50-8102 Center of Gravity and Weights 48AJ,AK,AW,AY051,060Compressor Physical Data 48AJ,AK,AW,AY Units035 036 040 041 Nominal Capacity tons 050 051 060 Nominal Capacity tons A48-8246 Rigging InformationUnit Operating Weights Option and Accessory WeightsConstant Volume Fan Motor Weights Air Distribution Thru-the-Bottom Evaporator Fan Motor DataA48-3714 Install Flue HoodA48-3712 A48-3823Make Electrical Connections 48A Series Staged Gas ControlA48-2524 Unit Voltage 48A Min Max 46.2 203.6 225 Unbalanced 3-Phase Supply Voltage FLA MCA Electrical Data 48AJ,AK,AW,AY Units with Convenience Outlet030 040 Hacr Size Stage A48-6854 A48-8243Color Code Recommendations CCN Connection Approved Shield CableAdding Seal Strip to Top of Hood Sides Make Outdoor-Air Inlet AdjustmentsA48-8499 48-110448-1105 A48-4328Route VAV Static Pressure Sensors A48-8244A48-3808 Pressure Transducer Locations Field ModificationsA48-8245 Side Return Air Conversion
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Manual 118 pages 46.64 Kb

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.
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