Carrier 48AJ, 48EW, 48EY024-068, 48AW, 48AY020-060, 48EK, 48AK, 48EJ specifications 236.3/230.9

Page 38

Table 7 — Electrical Data — 48AJ,AK,AW,AY Units (cont)

UNIT SIZE

NOMINAL

VOLTAGE RANGE

COMPRESSOR

 

OFM

 

IFM

POWER

POWER

No. 1

No. 2

 

 

EXHAUST

SUPPLY

48AJ,AK,

VOLTAGE

 

 

 

 

 

 

 

AW,AY

(3 PH, 60 Hz)

Min

Max

RLA

LRA

RLA

LRA

Qty

FLA

Hp

FLA

FLA

MCA

MOCP*

 

 

(total)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

59.4/54.0

—

236.3/230.9

300/300

 

 

 

 

 

 

 

 

 

 

 

23.6/23.6

259.9/254.5

300/300

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

187

253

69.2

345

69.2

345

4

 

5.3

25

74.8/68.0

—

253.1/244.9

300/300

 

 

(ea)

23.6/23.6

276.7/268.5

350/300

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

88/80.0

—

269.6/259.6

350/300

 

 

 

 

 

 

 

 

 

 

 

23.6/23.6

293.2/283.2

350/350

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

27

—

102.6

125

 

 

 

 

 

 

 

 

 

 

 

12.6

115.2

125

 

 

 

 

 

 

 

 

 

 

 

 

 

050

460

414

508

28.8

173

28.8

173

4

 

2.7

25

34

—

110.9

125

 

(ea)

12.6

123.5

150

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

40

—

118.4

150

 

 

 

 

 

 

 

 

 

 

 

12.6

131.0

150

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

22

—

91.7

110

 

 

 

 

 

 

 

 

 

 

 

12.6

104.3

125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

518

632

26.7

120

26.7

120

4

 

2.4

25

27

—

96.8

110

 

 

(ea)

12.6

109.4

125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

32

—

103.0

125

 

 

 

 

 

 

 

 

 

 

 

12.6

115.6

125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

25

74.8/68.0

—

291.3/284.5

350/350

 

 

 

 

 

 

 

 

 

 

 

35.4/35.4

326.7/319.9

400/400

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

187

253

82.1

446

82.1

446

6

 

5.3

30

88/80.0

—

306.0/296.5

350/350

 

 

(ea)

35.4/35.4

341.4/331.9

400/400

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

114/104

—

338.5/326.0

450/400

 

 

 

 

 

 

 

 

 

 

 

35.4/35.4

373.9/361.4

450/450

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

25

34

—

148.3

175

 

 

 

 

 

 

 

 

 

 

 

18.9

167.2

200

 

 

 

 

 

 

 

 

 

 

 

 

 

060

460

414

508

43.6

223

43.6

223

6

 

2.7

30

40

—

154.3

175

 

(ea)

18.9

173.2

200

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

52

—

168.4

200

 

 

 

 

 

 

 

 

 

 

 

18.9

187.3

225

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

25

27

—

119.3

150

 

 

 

 

 

 

 

 

 

 

 

18.9

138.2

150

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

518

632

34.6

164

34.6

164

6

 

2.4

30

32

—

124.3

150

 

 

(ea)

18.9

143.2

175

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

41

—

134.9

175

 

 

 

 

 

 

 

 

 

 

 

18.9

153.8

175

 

 

 

 

 

 

 

 

 

 

 

 

 

LEGEND

FLA — Full Load Amps

HACR — Heating, Air Conditioning and Refrigeration

IFM — Indoor (Evaporator) Fan Motor

LRA — Locked Rotor Amps

MCA — Minimum Circuit Amps

MOCP— Maximum Overcurrent Protection

NEC — National Electrical Code

OFM — Outdoor (Condenser) Fan Motor

RLA — Rated Load Amps

*Fuse or HACR circuit breaker per NEC.

NOTES:

1.In compliance with NEC requirements for multimotor and combi- nation load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker. The Canadian units may be fuse or circuit breaker.

2.Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply volt- age is greater than 2%. Use the following formula to determine the percent of voltage imbalance.

% Voltage imbalance

= 100 x

max voltage deviation from average voltage

average voltage

 

Example: Supply voltage is 460-3-60.

AB = 452 v BC = 464 v AC = 455 v

Average Voltage = 452 + 464 + 455 3

1371

=

3

= 457

Determine maximum deviation from average voltage. (AB) 457 – 452 = 5 v

(BC) 464 – 457 = 7 v (AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

7

% Voltage Imbalance = 100 x 457

= 1.53%

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately.

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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 % 48EJ,EW,EK,EYD028 Rigging Weights 48AJ,AK,AW,AY UnitsAT Each Corner % 48EJ,EW,EK,EYD024 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 LocationStages 48A,E Series Staged Gas ImplementationNumber of Stages Model Number Position Heat Size Htstgtyp Thermistor Designations Supply-Air Thermistor Connections Indoor Air Quality Sensor Configuration Make Electrical Connections SIO CCNCOM DIPMin Max Unbalanced 3-Phase Supply VoltageElectrical Data 48AJ,AK,AW,AY Units RLA LRAQty 30.8/28.0 180.5/177.7 225/225 236.3/230.9 FLA LRA Electrical Data 48EJ,EK,EW,EY UnitsRange Exhaust FAN Motor MCA Mocp EW,EYFLA LRA MCA Mocp EW,EY 54.0 23.6 41.6 RLA FLANEC Field Power Wiring Connections GND GroundGND CCBEquip IFCOFC Indoor-Fan Relay Terminal Block Carrier Comfort Network Indoor-Fan CircuitCCN IFC Pesc 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 120.5 119.5 48EJ,EK,EW,EY058-068 Unit Size80.5 79.5 48EJ,EK,EW,EY024-054 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 Open DIP Switch ConfigurationSetting ClosedAirflow DIP Switch Factory SettingsFan Performance, 48AJ,AK020-030 Vertical Discharge Units 17,000 Fan Performance, 48AJ,AK035 Vertical Discharge Units16,000 18,00020,000 Fan Performance, 48AJ,AK040,050 Vertical Discharge Units19,000 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 15,00013,000 14,000 15,000 16,000 17,000 18,000 Fan Performance, 48AW,AY035 Horizontal Discharge Units17,000 18,000 16,000 17,000 18,000 19,000 20,000 Fan Performance, 48AW,AY040,050 Horizontal Discharge Units19,000 20,000 Fan Performance, 48AW,AY060 Horizontal Discharge Units 26,000 27,000Fan Performance, 48EJ,EK024,034 Vertical Discharge Units Rpm Bhp 000 1066 1096 1125 Fan Performance, 48EJ,EK038,044 Vertical Discharge Units19,000 20,000 Available External Static Pressure in. wg 15,000 16,000 17,000 18,000 19,000 20,000000 1086 11.10 1114 11.61 1141 12.14 Fan Performance, 48EJ,EK048 Vertical Discharge UnitsRpm Bhp Fan Performance, 48EJ,EK054-068 Vertical Discharge Units 10,000 949 13.81 970 14.54 990 15.2610,000 956 12.99 976 13.66 996 14.32 Fan Performance, 48EW,EY054-068 Horizontal Discharge Units26,000 27,000 Available External Static Pressure in. wg 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 CommonFunction Location Staged Gas System ComponentsStage Gas System Inputs/Outputs Input DescriptionNavigator Display Navigator Display Menu StructureDEG. F Reset Occupied Morning Temperature Software HeatVersion Enabled ConditionField-Supplied Smoke Detector Wiring Device Pressurization Smoke Purge Evacuation Fire Shutdown Smoke Control ModesCooling Capacity Staging Table, CV Units with 2 Compressors StagesService Typical Gas Heating Section Lubrication Manufacturer LubricantEvaporator-Fan Motor Replacement Evaporator Fan Service and ReplacementBelt Tension Adjustment To adjust belt tension Condenser-Fan AdjustmentGas Valve Adjustment Cooling Charging Chart 48EJ,EK,EW,EY024-034Cooling Charging Chart 48EJ,EK,EW,EY054-068 Protective Devices 06D-537 208/230-3-60 Following fan motors have two Voltage WireIndoor Voltage Wire 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 AlarmsTerminal no Assignment O Channel Designations Base Module CVO Channel Designations Base Module VAV IAQService Training START-UP Checklist General
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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.
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