Carrier EY024-048 CCN Connection Approved Shielded Cables, Manufacturer Cable Part no, 2413 or

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SPACE TEMPERATURE AVERAGING Ð 4 SENSOR APPLICATION

SPACE TEMPERATURE AVERAGING Ð 9 SENSOR APPLICATION

Fig. 22 Ð Space Temperature Averaging Wiring

Remote Field Control Ð A switch closure across terminals R and W1 on TB-3 will initiate the Occupied mode. This can be done manually as well as through a ®eld-supplied timeclock.

Service Tool, Building Supervisor, and ComfortWorks™ Software Ð Access to the control board can be achieved through the terminal marked CCN via a 3-wire bus.

IMPORTANT: The default bus address is 0. The de- fault element number is 1. Refer to CCN literature to change the default values, if needed.

Carrier Comfort Network Interface Ð The 48E units can be connected to the CCN. The communication bus wiring is sup- plied and installed in the ®eld. Wiring consists of shielded, 3-conductor cable with drain wire.

The system elements are connected to the communication bus in a daisy chain arrangement. The positive pin of each system element communication connector must be wired to the positive pins of the system element on either side of it, the negative pins must be wired to the negative pins, and the

signal pins must be wired to signal ground pins. Wiring con- nections for CCN should be made at the 3-pin plug (CCN located at the base board). Consult CCN literature for fur- ther information.

Conductors and drain wire must be 20 AWG minimum stranded, tinned copper. Individual conductors must be in- sulated with PVC, PVC/nylon, vinyl, Te¯on, or polyethyl- ene. An aluminum/polyester 100% foil shield and an outer jacket of PVC, PVC/nylon, chrome vinyl, or Te¯on with a minimum operating temperature range of −20 C to 60 C (−4 F to 140 F) is required. Table 5 lists cables that meet the requirements.

Table 5 Ð CCN Connection Approved Shielded Cables

MANUFACTURER

CABLE PART NO.

Alpha

2413 or 5463

American

A22503

Belden

8772

Columbia

02525

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Contents Installation, Start-Up Service Instructions Instructions on Field Fabricate DuctworkDegrees and Inches Unit Leveling Tolerances DimensionsRoof Curb Sizes Size WeightUnit Operating 48EJE044 Ft-in 48EJ,EKD03848EJE038 48EJ,EKD044Base Unit Dimensions, 48EW,EY024-034 Base Unit Dimensions, 48EW,EY038-048 48EJ,EK,EW,EYD038 Unit Weight 48EJ,EK,EW,EYD02448EJ,EK,EW,EYD028 48EJ,EK,EW,EYD030 48EJ,EK,EW,EYD034Unit 48EJ,EK,EW,EY Physical Data4442/4602 4668/4828 4955/5115 Air Distribution Ð Thru-the-Bottom Combustion Fan Housing Location VAV Unit Configuration Default Cooling Default HeatingField Control Remote Start/Stop Make Electrical Connections LED CCNSIO FLA LRA MCA Mocp Electrical DataRLA LRA NEC FLA LRAFLA HacrMinimum Circuit Amps Qty044 Heating, Air ConditioningTerminal Block GND Ð GroundPEC DIP8772 CCN Connection Approved Shielded CablesManufacturer Cable Part no 2413 orWhite Make Outdoor-Air Inlet AdjustmentsColor Code Recommendations REDAdding 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 Vdc Direct Digital Controls DIP Switch ConguraPotentiometer Signal Levels Building Pressure Signal LevelDIP Switch Factory Settings Power Exhaust Default Set PointsDIP Switch Conguration Airflow 19,000 16,00017,000 18,000528 572 615 656 695 733 769 805 Standard Efficiency Motors Fan Performance Ð Power ExhaustMotor Limitations ESPAir Quantity Limits Sequence of OperationUser Dened Set Points GAS HEATING, Variable AIR Volume VAV Units HIR DEG. F ResetCOM Device Pressurization Smoke Purge Evacuation Fire Shutdown Smoke Control ModesCompressor Cooling Capacity Staging Table, CV Units With 2 CompressorsStages Manufacturer Lubricant LubricationTypical Gas Heating Section Evaporator Fan Service and ReplacementCondenser-Fan Adjustment Evaporator-Fan Motor ReplacementProtective Devices Belt Tension AdjustmentGas Valve Tran AHAIFC IfcbTypical 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 Control Board LED Alarms IGC Control Board LED AlarmsSPT I/O Channel Designations Base Module Ð CVI/O Channel Designations Base Module Ð VAV Terminal no AssignmentPackaged 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.

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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