Carrier installation instructions Physical Data Unit 48EZ-A, Unit Size 48EZ

Page 9

Table 1 – Physical Data - Unit 48EZ-A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UNIT SIZE 48EZ

---A

 

24040

24060

30040

 

30060

36060

 

36090

42060

42090

 

NOMINAL CAPACITY ---

ton

 

 

2

 

2

2---

1/2

 

2---

1/2

 

3

 

 

3

3---

1/2

3---

1/2

 

SHIPPING WEIGHT ---

lb.

 

359

359

373

 

373

379

 

379

461

461

 

 

 

 

 

(kg)

163

163

169

 

169

172

 

172

209

209

 

COMPRESSORS

 

 

 

 

 

 

 

 

 

 

Scroll

 

 

 

 

 

 

 

 

 

 

Quantity

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

REFRIGERANT (R---

410A)

 

 

8.3

 

8.3

10.2

 

10.2

 

7.9

 

 

7.9

10.0

10.0

 

Quantity ---

lb

 

 

 

 

 

 

 

 

 

 

 

 

(kg)

 

 

 

3.8

 

3.8

 

4.6

 

 

4.6

 

3.6

 

 

3.6

 

4.5

 

4.5

 

REFRIGERANT METERING

 

 

 

 

 

 

Indoor TXV, Outdoor ---

Accurater

 

 

 

 

 

 

 

DEVICE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUTDOOR ORIFICE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.038

(Left)

in. (qty)

 

 

 

0.032

(2)

 

 

0.035

(2)

 

 

0.037 (2)

 

 

 

 

 

 

 

 

 

 

 

0.040(Right)

(mm)

 

 

 

 

 

.81

 

 

 

.89

 

 

 

.94

 

 

 

.97/1.02

 

 

OUTDOOR COIL

 

 

2

...21

2

...21

2

...21

 

2

...21

2

...21

 

2

...21

2

...21

2

...21

 

Rows...Fins/in.

 

 

 

 

 

Face Area---

sq ft

 

 

11.9

11.9

11.9

 

11.9

11.9

 

11.9

13.6

13.6

 

OUTDOOR FAN

 

 

2000

2000

2700

 

2700

2700

 

2700

3100

3100

 

Nominal Cfm

 

 

 

 

 

 

Diameter---

in.

 

 

 

 

24

 

24

 

24

 

 

24

 

24

 

 

24

 

26

 

26

 

 

 

(mm)

 

610

610

610

 

610

610

 

610

660

660

 

Motor Hp (Rpm)

 

 

1/5 (810)

1/5 (810)

1/5 (810)

 

1/5 (810)

1/5 (810)

 

1/5 (810)

1/5 (810)

1/5 (810)

 

INDOOR COIL

 

 

3

17

3

17

3

17

 

3

17

3

17

 

3

17

3

17

3

17

 

...Rows Fins/in.

 

 

 

 

 

Face Area---

sq ft

 

 

 

3.7

 

3.7

 

3.7

 

 

3.7

 

3.7

 

 

3.7

 

4.7

 

4.7

 

INDOOR BLOWER

 

 

800

800

1000

 

1000

1200

 

1200

1400

1400

 

Nominal Cooling Airflow---

(CFM)

 

 

 

Size ---

in.

 

 

 

10x10

10x10

10x10

 

10x10

11x10

 

11x10

11x10

11x10

 

 

(mm)

 

 

254x254

254x254

254x254

 

254x254

279x254

 

279x254

279x254

279x254

 

Motor

---hp

 

 

 

1/2

1/2

1/2

 

1/2

3/4

 

3/4

3/4

3/4

 

FURNACE SECTION*

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Burner Orifice

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Natural Gas Qty...Drill Size (Factory

Installed)

2

...44

2

...38

2

...44

 

2

...38

2

...38

 

3

...38

2

...38

3

...38

 

Propane GasQty...

Drill Size

2

...55

2

...53

2

...55

 

2

...53

2

...53

 

3

...53

2

...53

3

...53

 

HIGH --- PRESSURE SWITCH

 

 

 

 

 

 

 

 

650 +/

---15

 

 

 

 

 

 

 

 

(psig) Cut---

out

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset (Auto)

 

 

 

 

 

 

 

 

 

 

 

420 +/

---25

 

 

 

 

 

 

 

 

LOSS--- OF---

CHARGE /

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LOW--- PRESSURE SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Liquid Line) (psig)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cut---

out

 

 

 

 

 

 

 

 

 

 

 

20 +/

---5

 

 

 

 

 

 

 

 

Reset (auto)

 

 

 

 

 

 

 

 

 

 

 

45 +/ ---

10

 

 

 

 

 

 

 

 

 

RETURN---AIR FILTERS † }

20x20x1

 

 

20x24x1

 

 

 

 

 

 

24x30x1

 

 

 

 

Throwaway

(in.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(mm)

 

 

508x508x25

 

 

508x610x25

 

 

 

 

 

 

610x762x25

 

 

 

*Based on altitude of 0 to 2000 ft (0---

610 m).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

{Required filter sizes shown are based on the larger of the ARI (Air Conditioning and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of 300 ft/minute for high ---capacity type. Air filter pressure drop for non ---standard filters must not exceed 0.08 IN. W.C.

}If using accessory filter rack refer to filter rack installation instructions for correct filter size and quantity.

48EZ -- A

9

Image 9
Contents Safety Considerations Table of ContentsIntroduction Receiving and InstallationCheck Equipment Provide Unit Support48EZ-A24-36 Unit Dimensions 48EZ-A42-60 Unit Dimensions Small Curb Provide Clearances Rig and Place UnitPersonal Injury or Property Damage HazardInstall Gas Piping Install Flue HoodConnect Condensate Drain InspectionSediment Trap Fire or Explosion HazardUnit Size 48EZ Physical Data Unit 48EZ-APhysical Data Unit 48EZ-A Cont’d Maximum Gas Flow CapacityHeating Inputs Configuring Units for Downflow Vertical Discharge Install Duct ConnectionsAlternate Method Unit Component Damage HazardSupply Duct Panels Special Procedures for 208-V Operation Install Electrical ConnectionsHigh-Voltage Connections Control Voltage ConnectionsPRE-START-UP Balance Point Setting-Thermidistat or Hybrid ThermostatTransformer Protection FIRE, EXPLOSION, Electrical Shock HazardSTART-UP Start-up Heating and Make Adjust- mentsCheck for Refrigerant Leaks Unit Sequence of OperationCheck Heating Control Adjust Gas InputCheck Gas Input Unit Damage HazardLimit Switches Airflow and Temperature RiseRollout Switch Check Burner FlameChecking and Adjusting Refrigerant Charge Start-up Cooling and Make Adjust- mentsIndoor Airflow and Airflow Adjustments Checking Cooling Control OperationGas Heating Fan Speed Set-up Two Cooling Fan Speeds Set-up Dehumidification feature usedContinuous Fan Operation Color Coding for Indoor Fan Motor Leads48EZ-A Wet Coil Pressure Drop IN. W.C Filter Pressure Drop Table IN. W.C741 638 547 415 Heating Low Blue 1234 1168 1093 1021 961 894 825 759 687 Heating Low Blue 1736 1695 1642 1601 1553 1512 1465 1427 1381 65oF Heating 1927 1893 1858 1824 1791 1759 1720 1689 1640 65oF Heating 48EZ a 208/230-3-60 Wiring Diagram, Unit 48EZ-A Cooling Charging Table-Subcooling Cleaning the Blower Motor and Wheel MaintenanceAir Filter Indoor Blower and MotorInduced Draft combustion air Blower Assembly Limit SwitchBurner Ignition Main BurnersElectrical Controls and Wiring Outdoor FanRefrigerant Circuit Loss of Charge Switch Pressure SwitchesGas Input Indoor AirflowHigh-Pressure Switch Copeland Scroll Compressor Puron RefrigerantExplosion Hazard Unit Operation and Safety Hazard Refrigerant SystemCompressor Oil Troubleshooting START-UP ChecklistPuronr R-410A Quick Reference Guide Symptom Cause Remedy Troubleshooting Guide Cooling or Heat Pump Heating ModeTroubleshooting Guide-LED Error Codes Troubleshooting Guide-HeatingRemove and Store in Job Files TemperaturesPreliminary Information Model no III. START-UP Electrical Supply Voltage Compressor AmpsCatalog No 48EZ---06SI
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Manual 10 pages 39.3 Kb

48EZ-A specifications

The Carrier 48EZ-A and 48VT-A are two advanced rooftop unit air conditioners that exemplify innovation and efficiency in HVAC technology. Designed for commercial applications, these units provide optimal comfort while ensuring energy conservation and reliability.

One of the standout features of the Carrier 48EZ-A is its high-efficiency cooling system. With SEER ratings reaching up to 16, this model uses advanced compressor technology to ensure that energy consumption stays low while maximizing cooling output. The 48EZ-A incorporates a two-stage scroll compressor that enhances performance during partial load conditions, making it ideal for varying temperature demands throughout the day.

Meanwhile, the Carrier 48VT-A is designed with variable speed technology that allows for precise modulation of airflow and cooling capacity, adapting seamlessly to real-time building conditions. This technology not only improves comfort but also significantly reduces energy usage by optimizing operational efficiency.

Both units are equipped with advanced microprocessor controls that facilitate superior management of the HVAC system. The controls offer programmable options allowing for enhanced control over system operation, scheduling, and diagnostics. This promotes easy maintenance and ensures long-term reliability.

In terms of construction, the Carrier 48EZ-A and 48VT-A units are built with corrosion-resistant materials, ensuring durability and longevity even in challenging environments. The cabinet is designed with insulated panels to minimize sound levels, making them suitable for installation in noise-sensitive locations.

Moreover, both models are equipped for easy installation and serviceability. The logical wiring design and access ports streamline maintenance, reducing downtime and optimizing overall performance. Additionally, they feature an energy-efficient fan design that maximizes airflow while minimizing energy use.

In summary, the Carrier 48EZ-A and 48VT-A rooftop units stand out in the HVAC market for their energy efficiency, advanced technology, and durable construction. These features make them ideal choices for various commercial applications where comfort, efficiency, and reliability are paramount. The combination of high-performance components and user-friendly features positions these models as leaders in modern HVAC solutions.