Carrier 48EZ(N)-A installation instructions Physical Data Unit 48EZ-A

Page 10

48EZ -- A

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 AHRI (Air Conditioning, Heating 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.

10

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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 Roof Curb Dimensions NumberRig and Place Unit Field Fabricate DuctworkProvide Clearances InspectionConnect Condensate Drain Install Flue HoodInstall Gas Piping Rigging/Lifting of Unit See FigFire or Explosion Hazard Sediment TrapInstall Duct Connections Configuring Units for Downflow Vertical DischargePhysical Data Unit 48EZ-A Maximum Gas Flow Capacity Physical Data Unit 48EZ-A Cont’dHeating Inputs High-Voltage Connections Install Electrical ConnectionsSpecial Procedures for 208-V Operation Unit Component Damage HazardControl Voltage Connections Balance Point Setting-Thermidistat or Hybrid ThermostatPRE-START-UP Transformer ProtectionCheck for Refrigerant Leaks Start-up Heating and Make Adjust- mentsSTART-UP Unit Sequence of OperationCheck Gas Input Adjust Gas InputUnit Damage Hazard Start-up Cooling and Make Adjust- ments Gas Heating Fan Speed Set-up Checking and Adjusting Refrigerant ChargeIndoor Airflow and Airflow Adjustments Unit Operation HazardContinuous Fan Operation Two Cooling Fan Speeds Set-up Dehumidification feature usedColor Coding for Indoor Fan Motor Leads Unit Heating Rise Motor Dry Coil Air Delivery* Horizontal Unit 48EZ-A24-60Range Speed Color Dry Coil Air Delivery* Horizontal Discharge Unit 48EZ-A24-60 1354 1290 1226 1158 1102 1046 981 918 843 55oF Heating Rise Medium1 48EZ ---,NA48090 48EZ ---,NA48130 Unit Heating Rise Motor Wire Downflow Cooling Standard CFM Scfm Economizer + Tons Horizontal and Downflow Filter Pressure Drop Table IN. W.CUnit Standard CFM Scfm Size Cooling Standard CFM Scfm48EZ a 208/230-1-60 Ladder Wiring Diagram, Unit 48EZ-A 208/230-3-60 Connection Wiring Diagram, Unit 48EZ-A Cont. 208/230-3-60 Ladder 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-LED Error Codes Troubleshooting Guide-HeatingLED OFF Preliminary Information Model no TemperaturesRemove and Store in Job Files III. START-UP Electrical Supply Voltage Compressor Amps