Carrier EK, EW Aha, Ifcb, Tran, Ifr, Cap, Igc, Ccb, Lps, Cch, Mgv, Comp, Oat, Ofc, Equip, Pem

Page 50

LEGEND and NOTES for Fig. 56-60 Ð Typical Wiring Schematics

LEGEND

AHA

Ð Adjustable Heat Anticipator

IFC

Ð Indoor Fan Contactor

TC

Ð Thermostat Cooling

BP

Ð Building Pressure

IFCB

Ð Indoor Fan Circuit Breaker

TH

Ð Thermostat Heating

BR

Ð Burner Relay

IFM

Ð Indoor-Fan Motor

TRAN

Ð Transformer

C

Ð Contactor, Compressor

IFR

Ð Indoor-Fan Relay

UL

Ð Compressor Unloader

CAP

Ð Capacitor

IGC

Ð Integrated Gas Unit Controller

VFD

Ð Variable Frequency Drive

CB

Ð Circuit Breaker

IP

Ð Internal Protector

 

Terminal (Marked)

CC

Ð Cooling Compensator

L

Ð Light

 

CCB

Ð Controller Circuit Breaker

LPS

Ð Low-Pressure Switch

 

 

CCH

Ð Crankcase Heater

MGV

Ð Main Gas Valve

 

Terminal (Unmarked)

COM

Ð Communication

NC

Ð Normally Closed

 

 

COMP

Ð Compressor Motor

NO

Ð Normally Open

 

Terminal Block

CR

Ð Control Relay

OAT

Ð Outdoor-Air Thermistor

 

 

 

DM

Ð Damper Motor

OFC

Ð Outdoor-Fan Contactor

 

Splice

DP

Ð Duct Pressure

OFM

Ð Outdoor-Fan Motor

 

EC

Ð Enthalpy Control

PEC

Ð Power Exhaust Contactor

 

Factory Wiring

EQUIP

Ð Equipment

PEM

Ð Power Exhaust Motor

 

FLA

Ð Full Load Amps

PES

Ð Power Exhaust Sequencer

 

Field Wiring

FPT

Ð Freeze Protection Thermostat

PESC Ð Power Exhaust Sequencer

 

 

 

FU

Ð Fuse

 

Controller

 

To Indicate Common Potential Only,

GRD

Ð Ground

PL

Ð Plug Assembly

 

 

Not To Represent Wiring

GVR

Ð Gas Valve Relay

R

Ð Relay

 

 

 

HPS

Ð High-Pressure Switch

RAT

Ð Return-Air Thermistor

 

 

HS

Ð Hall Effect Sensor

RS

Ð Rollout Switch

 

 

HV

Ð High Voltage

SAT

Ð Supply-Air Thermistor

 

 

IDM

Ð Induced-Draft Motor

TB

Ð Terminal Block

 

 

NOTES:

1.Connect TRAN1 to H4 for 460 v units. Connect to H3 for 230 v. If 208/230 v units are run with a 208 v power supply connect to H2.

2.Connect TRAN2 to black lead for 460 v units. Connect to orange lead for 230 v units. If 208/230 v units are run with a 208 v power supply connect to red lead.

3.Circuit breaker must trip amps are equal to or less than 156% FLA for CB1 and CB2. All others are 140%.

4.If any of the original wire furnished must be replaced, it must be replaced with type 90 C wire or its equivalent.

5.Compressors and/or fan motors are thermally protected.

6.Three phase motors are protected against primary single phasing conditions.

7.Red wire and violet wire are spliced together at the factory. The brown wire has a wire nut added at the factory.

TABLE A

THE FOLLOWING COMPRESSORS HAVE TWO PARALLEL WIRES RUN FROM TB1 TO THE COMPRESSORS

(NOT SHOWN ON LABEL DIAGRAM)

COMPRESSOR

VOLTAGE

WIRE

MODEL

QUANTITY

 

06D-537

208/230-3-60

2

TABLE B

THE FOLLOWING FAN MOTORS HAVE TWO PARALLEL WIRES RUN FROM TB1 TO THE FAN MOTORS

(NOT SHOWN ON LABEL DIAGRAM)

INDOOR

VOLTAGE

WIRE

MOTOR

QUANTITY

 

20 HP

208/230-3-60

2

50

Image 50
Contents Installation, Start-Up Service Instructions Field Fabricate Ductwork Instructions onUnit Leveling Tolerances Dimensions Degrees and InchesRoof Curb Sizes Size WeightUnit Operating 48EJ,EKD044 Ft-in 48EJ,EKD03848EJE038 48EJE044Base Unit Dimensions, 48EW,EY024-034 Base Unit Dimensions, 48EW,EY038-048 48EJ,EK,EW,EYD034 Unit Weight 48EJ,EK,EW,EYD02448EJ,EK,EW,EYD028 48EJ,EK,EW,EYD030 48EJ,EK,EW,EYD038Physical Data Unit 48EJ,EK,EW,EY4442/4602 4668/4828 4955/5115 Air Distribution Ð Thru-the-Bottom Combustion Fan Housing Location Unit Configuration Default Cooling Default Heating VAVField Control Remote Start/Stop Make Electrical Connections LED CCNSIO FLA LRA MCA Mocp Electrical DataRLA LRA Hacr FLA LRAFLA NECHeating, Air Conditioning Qty044 Minimum Circuit AmpsGND Ð Ground Terminal BlockDIP PEC2413 or CCN Connection Approved Shielded CablesManufacturer Cable Part no 8772RED Make Outdoor-Air Inlet AdjustmentsColor Code Recommendations WhiteAdding 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 Building Pressure Signal Level Direct Digital Controls DIP Switch ConguraPotentiometer Signal Levels VdcDIP Switch Factory Settings Power Exhaust Default Set PointsDIP Switch Conguration Airflow 18,000 16,00017,000 19,000528 572 615 656 695 733 769 805 ESP Fan Performance Ð Power ExhaustMotor Limitations Standard Efficiency MotorsSequence of Operation Air Quantity LimitsUser Dened Set Points GAS HEATING, Variable AIR Volume VAV Units HIR DEG. F ResetCOM Smoke Control Modes Device Pressurization Smoke Purge Evacuation Fire ShutdownCompressor Cooling Capacity Staging Table, CV Units With 2 CompressorsStages Lubrication Manufacturer LubricantEvaporator Fan Service and Replacement Typical Gas Heating SectionEvaporator-Fan Motor Replacement Condenser-Fan AdjustmentBelt Tension Adjustment Protective DevicesGas Valve Ifcb AHAIFC TranTypical 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 IGC Control Board LED Alarms Control Board LED AlarmsTerminal no Assignment I/O Channel Designations Base Module Ð CVI/O Channel Designations Base Module Ð VAV SPTPackaged Service Training START-UP Checklist General
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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.

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