Carrier Physical Data Unit 48EZ-A Cont’d, Maximum Gas Flow Capacity, Heating Inputs

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48EZ -- A

Table 1 - Physical Data - Unit 48EZ-A (Cont’d)

 

 

 

 

 

 

 

 

 

 

UNIT SIZE 48EZ ---

A

 

48090

48115

48130

 

60090

60115

60130

NOMINAL CAPACITY ---

ton

 

4

 

4

 

4

 

 

5

 

5

 

5

OPERATING WEIGHT---

lb

482

482

482

 

507

507

507

 

 

 

 

(kg)

219

219

219

 

230

230

230

COMPRESSORS

 

 

 

 

 

 

Scroll

 

 

 

 

 

Quantity

 

 

 

 

 

 

 

1

 

 

 

 

 

 

REFRIGERANT (R 410A)---

 

 

 

9.6

 

 

 

 

 

12.3

 

 

Quantity ---

lb

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(kg )

 

 

 

 

4.4

 

 

 

 

 

 

5.6

 

 

REFRIGERANT METERING DEVICE

 

 

 

 

 

TXV

 

 

 

 

 

 

OUTDOOR ORIFICE---

in. (qty)

 

 

0.046 (2)

 

 

 

 

 

0.052 (2)

 

 

 

 

(mm)

 

 

 

1.2

 

 

 

 

 

 

1.3

 

 

OUTDOOR COIL

 

2

...21

2

...21

2

...21

 

2

...21

2

...21

2

...21

Rows...Fins--- in.

 

 

Face Area---

sq ft

 

13.6

13.6

13.6

 

17.5

17.5

17.5

OUTDOOR FAN

 

3100

3100

3100

 

3500

3500

3500

Nominal Cfm

 

 

 

Diameter---

in.

 

 

 

26

 

26

 

26

 

 

26

 

26

 

26

 

 

(mm)

660

660

660

 

660

660

660

Motor Hp---

Rpm

 

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

Rows...Fins--- in.

 

 

Face Area---

sq ft

 

 

4.7

 

4.7

 

4.7

 

 

5.7

 

5.7

 

5.7

INDOOR BLOWER

 

1600

1600

1600

 

1850

1850

1850

Nominal Cooling Airflow---

(CFM)

 

Size ---

in.

 

 

11x10

11x10

11x10

 

11x10

11x10

11x10

 

(mm)

 

279x254

279x254

279x254

 

279x254

279x254

279x254

Motor

---hp

 

 

 

1.0

 

1.0

 

1.0

 

 

1.0

 

1.0

 

1.0

FURNACE SECTION*

 

 

 

 

 

 

 

 

 

 

 

 

 

Burner Orifice

 

 

3

...38

3

...33

3

...31

 

3

...38

3

...33

3

...31

Natural Gas Qty...Drill Size (Factory Installed)

 

Propane GasQty...

Drill Size

3

...53

3

...51

3

...49

 

3

...53

3

...51

3

...49

HIGH --- PRESSURE SWITCH (psig) Cut out---

 

 

 

 

 

650 +/ ---

15

 

 

 

 

 

Reset (Auto)

 

 

 

 

 

 

 

420 +/ ---

25

 

 

 

 

 

LOSS--- OF---

CHARGE /

 

 

 

 

 

 

 

 

 

 

 

 

 

LOW--- PRESSURE SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

(Liquid Line) (psig)

 

 

 

 

 

 

20 +/ ---

5

 

 

 

 

 

Cut---

out

 

 

 

 

 

 

 

 

 

 

 

 

Reset (auto)

 

 

 

 

 

 

 

45 +/ ---

10

 

 

 

 

 

RETURN---AIR FILTERS †

 

 

 

 

 

24x36x1

 

 

 

 

 

Throwaway

(in.)

 

 

 

 

 

 

 

 

 

 

 

(mm)

 

 

 

 

 

 

 

 

(610x914x25)

 

 

 

 

 

*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.

Table 2 – Maximum Gas Flow Capacity*

NOMINAL

INTERNAL

 

 

 

 

 

LENGTH OF PIPE, FT† (m)

 

 

 

 

 

IRON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DIAMETER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

20

30

40

50

60

70

80

90

100

125

150

175

200

PIPE,

SIZE (IN.)

(IN.)

(3.1)

(6.1)

(9.1)

(12.2)

(15.2)

(18.3)

(21.3)

(24.4)

(27.4)

(30.5)

(38.1)

(46.0)

(53.3)

(61.0)

 

1/2

.622

175

120

97

82

73

66

61

57

53

50

44

40

3/4

.824

360

250

200

170

151

138

125

118

110

103

93

84

77

72

1

1.049

680

465

375

320

285

260

240

220

205

195

175

160

145

135

1---1/4

1.380

1400

950

770

600

580

530

490

460

430

400

360

325

300

280

1---1/2

1.610

2100

1460

1180

990

900

810

750

690

650

620

550

500

460

430

*Capacity of pipe in cu ft of gas per hr for gas pressure of 0.5 psig or less. Pressure drop of 0.5---IN. W.C. (based on a 0.60 specific gravity gas). Refer to Table 2 and National Fire Protection Association NFPA 54/ANSI Z223.1.

† This length includes an ordinary number of fittings.

Table 3 – Heating Inputs

 

 

 

 

 

 

 

 

 

 

HEATING INPUT

 

NUMBER OF

 

GAS SUPPLY PRESSURE (IN. W.C.)

MANIFOLD PRESSURE

 

 

Natural{

Propane*{

(IN. W.C.)

(BTUH)

 

ORIFICES

 

 

 

 

Min

 

Max

Min

 

Max

Natural{

Propane*†

40,000

 

2

4.0

 

13.0

11.0

 

13.0

3.23.8

10.0∼11.0

60,000

 

2

4.0

 

13.0

11.0

 

13.0

3.23.8

10.0∼11.0

90,000

 

3

4.0

 

13.0

11.0

 

13.0

3.23.8

10.0∼11.0

115,000

 

3

4.0

 

13.0

11.0

 

13.0

3.23.8

10.0∼11.0

130,000

 

3

4.0

 

13.0

11.0

 

13.0

3.23.8

10.0∼11.0

*When a unit is converted to propane, different size orifices must be used. See separate, natural ---

to propane conversion kit instructions.---

 

{Based on altitudes from sea level to 2000 ft (610 m) above sea level. In U.S.A. for altitudes above 2000 ft (610 m), reduce input rating 4 percent for each addi- tional 1000 ft (305 m) above sea level. In Canada, from 2000 ft (610 m) above sea level to 4500 ft (1372 m) above sea level, derate the unit 10 percent.

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Contents Table of Contents Safety ConsiderationsCheck Equipment Receiving and InstallationIntroduction Provide Unit Support48EZ-A24-36 Unit Dimensions 48EZ-A42-60 Unit Dimensions Small Curb Personal Injury or Property Damage Rig and Place UnitProvide Clearances HazardConnect Condensate Drain Install Flue HoodInstall Gas Piping InspectionFire or Explosion Hazard Sediment TrapPhysical Data Unit 48EZ-A Unit Size 48EZMaximum Gas Flow Capacity Physical Data Unit 48EZ-A Cont’dHeating Inputs Alternate Method Install Duct ConnectionsConfiguring Units for Downflow Vertical Discharge Unit Component Damage HazardSupply Duct Panels High-Voltage Connections Install Electrical ConnectionsSpecial Procedures for 208-V Operation Control Voltage ConnectionsTransformer Protection Balance Point Setting-Thermidistat or Hybrid ThermostatPRE-START-UP FIRE, EXPLOSION, Electrical Shock HazardCheck for Refrigerant Leaks Start-up Heating and Make Adjust- mentsSTART-UP Unit Sequence of OperationCheck Gas Input Adjust Gas InputCheck Heating Control Unit Damage HazardRollout Switch Airflow and Temperature RiseLimit Switches Check Burner FlameIndoor Airflow and Airflow Adjustments Start-up Cooling and Make Adjust- mentsChecking and Adjusting Refrigerant Charge Checking Cooling Control OperationContinuous Fan Operation Two Cooling Fan Speeds Set-up Dehumidification feature usedGas Heating Fan Speed Set-up Color Coding for Indoor Fan Motor LeadsFilter Pressure Drop Table IN. W.C 48EZ-A Wet Coil Pressure Drop 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 Air Filter MaintenanceCleaning the Blower Motor and Wheel Indoor Blower and MotorBurner Ignition Limit SwitchInduced Draft combustion air Blower Assembly Main BurnersOutdoor Fan Electrical Controls and WiringRefrigerant Circuit Gas Input Pressure SwitchesLoss of Charge Switch Indoor AirflowCopeland Scroll Compressor Puron Refrigerant High-Pressure SwitchExplosion Hazard Refrigerant System Unit Operation and Safety HazardCompressor Oil START-UP Checklist TroubleshootingPuronr R-410A Quick Reference Guide Troubleshooting Guide Cooling or Heat Pump Heating Mode Symptom Cause RemedyTroubleshooting Guide-Heating Troubleshooting Guide-LED Error CodesPreliminary Information Model no TemperaturesRemove and Store in Job Files III. START-UP Electrical Supply Voltage Compressor AmpsCatalog No 48EZ---06SI
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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.