Carrier 48AY020-060 O Channel Designations Base Module CV, O Channel Designations Base Module VAV

Page 115

Tables 46-48 show the input and output channel designations.

Table 46 — I/O Channel Designations Base Module — CV

TERMINAL NO.

ASSIGNMENT

TERMINAL NO.

ASSIGNMENT

T1-2

SPT (CCN) — 10KV Thermistor

T23-25

Compressor 2 Safety — DI (24 vac)

T3-4

STO (CCN) — 10KV Thermistor

T24-25

Outside Air Enthalpy — DI (24 vac)

T5-6

OAT — 5KV Thermistor

T26-27

Economizer Pos. — AO (4-20 mA)

T7-8

SAT — 5KV Thermistor

T28-29

Heat 1 Relay — DO (24 vac)

T9-10

—

T30-29

Heat 2 Relay — DO (24 vac)

T11-12

SAT Reset — AI (4 to 20 mA)

T31-32

CV Power Exhaust 1/Modulating Power Exhaust — DO (115 vac)

T13-14

IAQ Indoor — AI (4 to 20 mA)

T33-32

CV Power Exhaust 2 — DO (115 vac)

T15-16

IAQ Outdoor — AI (4 to 20 mA)

T34-35

Condenser Fan — DO (115 vac)

T17-25

Y1 or Remote Start/Stop — DI (24 vac)

T36-35

OFC2 — DO (115 vac)

T18-25

Y2 — DI (24 vac)

T37-38

—

T19-25

W1 — DI (24 vac)

T39-38

—

T20-25

W2 — DI (24 vac)

K1

Indoor Fan Relay — DO (LV)

T21-25

G — DI (24 vac)

K2

Compr. 1 — DO (HV)

T22-25

Compressor 1 Safety — DI (24 vac)

K3

Compr. 2 — DO (HV)

Table 47 — I/O Channel Designations Base Module — VAV

TERMINAL NO.

ASSIGNMENT

TERMINAL NO.

ASSIGNMENT

T1-2

SPT (CCN) — 10KV Thermistor

T23-25

Compressor 2 Safety — DI (24 vac)

T3-4

RAT — 5KV Thermistor

T24-25

Outside Air Enthalpy — DI (24 vac)

T5-6

OAT — 5KV Thermistor

T26-27

Economizer Pos. — AO (4-20 mA)

T7-8

SAT — 5KV Thermistor

T28-29

Heat 1 Relay - DO (24 v)

T9-10

—

T30-29

Heat Interlock Relay — DO (24 v)

T11-12

SAT Reset — AI (4 to 20 mA)

T31-32

Modulated Power Exhaust — DO (24 vac)

T13-14

IAQ Indoor — AI (4 to 20 mA)

T33-32

—

T15-16

IAQ Outdoor — AI (4 to 20 mA)

T34-35

Condenser Fan — DO (115 vac)

T17-25

Remote Start/Stop — DI (24 vac)

T36-35

OFC2 — DO (115 vac)

T18-25

—

T37-38

Unloader 1 — DO (115 vac)

T19-25

—

T39-38

Unloader 2 — DO (115 vac)

T20-25

—

K1

Indoor Fan Relay — DO (LV)

T21-25

—

K2

Compr. 1 — DO (HV)

T22-25

Compressor 1 Safety — DI (24 vac)

K3

Compr. 2 — DO (HV)

Table 48 — I/O Channel Designations Expansion Module (Field-Installed) — CV and VAV

TERMINAL NO.

ASSIGNMENT

TERMINAL NO.

ASSIGNMENT

T1-2

—

T23 and TB2-1

Fire — Evacuation — DI (24 vac)

T3-4

—

T24 and TB2-1

Fire — Smoke Purge — DI (24 vac)

T5-6

—

T26-27

—

T7-8

—

T28-29

—

T9-10

—

T30 and TB2-2

Alarm Light Indicator — DO (24 vac)

T11-12

—

T31

Power Exhaust Fire No. 1 — DO (115 vac)

T13-14

—

T33

Power Exhaust Fire No. 2 — DO (115 vac)

T15-16

—

T34

Power Exhaust Fire No. 3 — DO (115 vac)

T17 and TB2-1

Fan Status — DI (24 vac)

T36

Power Exhaust Fire No. 4 — DO (115 vac)

T18 and TB2-1

Filter Status - DI (24 vac)

T37

—

T19 and TB2-1

Field Applied Status — DI (24 vac)

T39

—

T20 and TB2-1

Demand Limit — DI (24 vac)

K1

—

T21 and TB2-1

Fire — Unit Shutdown — DI (24 vac)

K2

—

T22 and TB2-1

Fire — Pressurization — DI (24 vac)

K3

—

 

 

 

LEGEND (Tables 46-48)

AI

—

Analog Input

OAT — Outdoor-Air Temperature

AO

—

Analog Output

OFC — Outdoor Fan Contactor

CCN —

Carrier Comfort Network RAT — Return-Air Temperature

CV

—

Constant Volume

SAT — Supply-Air Temperature

DI

—

Direct Input

SPT — Space Temperature

DO

—

Direct Output

STO — Space Temperature Offset

HV

—

High Voltage

T

— Terminal

IAQ —

Indoor Air Quality

TB

— Terminal Block

KV

—

Kilo-Ohms

VAV — Variable Air Volume

LV

—

Low Voltage

 

 

NOTE: All even numbered terminals are negative (–) polarity and all odd numbered terminals are positive (+) polarity.

115

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Contents Installation, Start-Up Service Instructions Instructions on Make Unit Duct ConnectionsRoof 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,EYD030 Rigging Weights 48AJ,AK,AW,AY UnitsAT Each Corner % 48EJ,EW,EK,EYD024 48EJ,EW,EK,EYD028Unit 48AJ,AK,AW,AY Physical Data 48AJ,AK,AW,AY UnitsQuantity Rows...Fins/in Unit 48EJ,EK,EW,EY Physical Data 48EJ,EK,EW,EY Units06D537 06EA250 06EA265 Quantity...Type Ckt 1, Ckt Operating Weights Air Distribution Thru-the-Bottom Evaporator Fan Motor DataCombustion Fan Housing Location Install Flue HoodNumber of Stages Model Number Position Heat Size Htstgtyp 48A,E Series Staged Gas ImplementationStages Thermistor Designations Supply-Air Thermistor Connections Indoor Air Quality Sensor Configuration Make Electrical Connections DIP CCNCOM SIORLA LRA Unbalanced 3-Phase Supply VoltageElectrical Data 48AJ,AK,AW,AY Units Min MaxQty 30.8/28.0 180.5/177.7 225/225 236.3/230.9 MCA Mocp EW,EY Electrical Data 48EJ,EK,EW,EY UnitsRange Exhaust FAN Motor FLA LRAFLA LRA MCA Mocp EW,EY 54.0 23.6 41.6 NEC FLARLA GND Ground Field Power Wiring ConnectionsIFC CCBEquip GNDOFC CCN IFC Pesc Carrier Comfort Network Indoor-Fan CircuitIndoor-Fan Relay Terminal Block Color Code Recommendations CCN Connection Approved Shielded CablesSpace Temperature Averaging Wiring Make Outdoor-Air Inlet AdjustmentsAdding 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 Control Control Point Curve APPROX. DEG Psychrometric Chart for Enthalpy ControlBarometric Relief Damper and Power Exhaust Mounting Details 80.5 79.5 48EJ,EK,EW,EY024-054 Unit Size120.5 119.5 48EJ,EK,EW,EY058-068 Motormaster III Sensor Location 48EJ,EK,EW,EY054-064 Side Return Air Conversion Field ModificationsSTART-UP In. wg Pressure Control Signal VFD SET PointParameter Group Default Value Carrier Default Program Parameter ValuesMotor Standard Efficiency High Efficiency Typical Factory Wiring Optional Field Wiring Building Pressure Signal Level Closed DIP Switch ConfigurationSetting OpenFan Performance, 48AJ,AK020-030 Vertical Discharge Units DIP Switch Factory SettingsAirflow 18,000 Fan Performance, 48AJ,AK035 Vertical Discharge Units16,000 17,00017,000 18,000 19,000 20,000 Fan Performance, 48AJ,AK040,050 Vertical Discharge Units19,000 20,000Fan Performance, 48AJ,AK060 Vertical Discharge Units 11,000 12,000 13,000 14,000 15,000 Fan Performance, 48AW,AY020-030 Horizontal Discharge Units17,000 18,000 Fan Performance, 48AW,AY035 Horizontal Discharge Units13,000 14,000 15,000 16,000 17,000 18,000 19,000 20,000 Fan Performance, 48AW,AY040,050 Horizontal Discharge Units16,000 17,000 18,000 19,000 20,000 26,000 27,000 Fan Performance, 48AW,AY060 Horizontal Discharge UnitsFan Performance, 48EJ,EK024,034 Vertical Discharge Units 15,000 16,000 17,000 18,000 19,000 20,000 Fan Performance, 48EJ,EK038,044 Vertical Discharge Units19,000 20,000 Available External Static Pressure in. wg Rpm Bhp 000 1066 1096 1125Rpm Bhp Fan Performance, 48EJ,EK048 Vertical Discharge Units000 1086 11.10 1114 11.61 1141 12.14 10,000 949 13.81 970 14.54 990 15.26 Fan Performance, 48EJ,EK054-068 Vertical Discharge Units20,000 21,000 22,000 23,000 24,000 25,000 26,000 27,000 Fan Performance, 48EW,EY054-068 Horizontal Discharge Units26,000 27,000 Available External Static Pressure in. wg 10,000 956 12.99 976 13.66 996 14.32ESP Airflow LOW Speed Medium Speed High SpeedAir Quality Limits Motor LimitationsSequence of Operation Software Control Link Points User Defined Set PointsPage COM Common Heat Interlock Relay WiringInput Description Staged Gas System ComponentsStage Gas System Inputs/Outputs Function LocationNavigator Display Menu Structure Navigator DisplayCondition Occupied Morning Temperature Software HeatVersion Enabled DEG. F ResetField-Supplied Smoke Detector Wiring Stages Smoke Control ModesCooling Capacity Staging Table, CV Units with 2 Compressors Device Pressurization Smoke Purge Evacuation Fire ShutdownService Typical Gas Heating Section Manufacturer Lubricant LubricationCondenser-Fan Adjustment Evaporator Fan Service and ReplacementBelt Tension Adjustment To adjust belt tension Evaporator-Fan Motor ReplacementCooling Charging Chart 48EJ,EK,EW,EY024-034 Gas Valve AdjustmentCooling Charging Chart 48EJ,EK,EW,EY054-068 Protective Devices 20 HP 208/230-3-60 Voltage WireIndoor Voltage Wire 06D-537 208/230-3-60 Following fan motors have twoTypical 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 Control Board LED Alarms IGC Control Board LED AlarmsIAQ O Channel Designations Base Module CVO Channel Designations Base Module VAV Terminal no AssignmentService 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.

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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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