Carrier 48VT(N) Physical Data - Unit 48VT-A, Supply and Return Duct Opening, 48VT--A

Page 9
Table 1 – Physical Data - Unit 48VT-A

Table 1 – Physical Data - Unit 48VT-A

 

 

 

 

 

 

 

 

 

 

 

 

 

UNIT SIZE

 

 

024040

024060

030040

 

030060

036060

036090

042060

 

042090

NOMINAL CAPACITY ---

ton

 

 

2

 

2

2---

1/2

 

2---

1/2

 

3

 

3

3---

1/2

 

3---

1/2

SHIPPING WEIGHT ---

lb.

 

368

368

378

 

378

450

450

491

 

491

 

 

 

(kg)

 

167

167

171

 

171

204

204

223

 

223

COMPRESSORS

 

 

 

 

 

 

 

 

 

 

Scroll

 

 

 

 

 

 

 

 

Quantity

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

REFRIGERANT (R 410A)---

 

9.5

9.5

10.5

 

10.5

9.0

9.0

14.0

 

14.0

Quantity ---

lb

 

 

 

 

 

 

(kg)

 

 

4.3

4.3

4.8

 

4.8

4.1

4.1

6.4

 

6.4

REFRIGERANT METERING

 

 

 

 

 

 

 

Indoor TXV, Outdoor Accurater

 

 

 

 

 

 

 

DEVICE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUTDOOR ORIFICE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.038 (Left OD Coil)

in. (qty)

 

 

0.032 (2)

0.032 (2)

0.038 (2)

 

0.038 (2)

0.040 (2)

0.040 (2)

 

 

 

0.040 (Right OD Coil)

(mm)

 

 

 

.81

.81

.97

 

.97

1.02

1.02

 

.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

 

 

13.6

13.6

15.4

 

15.4

13.6

13.6

19.4

 

19.4

OUTDOOR FAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nominal Cfm

 

 

2500

2500

2600

 

2600

3000

3000

3500

 

3500

Diameter---

in.

 

 

 

22

 

22

 

22

 

 

22

 

22

 

22

 

22

 

 

22

 

 

(mm)

 

559

559

559

 

559

559

559

559

 

559

Motor Hp (Rpm)

 

 

1/8 (825)

1/8 (825)

1/8 (825)

 

1/8 (825)

1/4 (1100)

1/4 (1100)

1/8 (825)

 

1/8 (825)

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

4.7

4.7

4.7

 

4.7

INDOOR BLOWER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nominal Cooling Airflow---

(CFM)

 

800

800

1000

 

1000

1200

1200

1400

 

1400

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

 

 

2

...44

2

...38

2...

44

 

2...

44

2

...38

3

...38

2...

38

 

3...

38

Natural Gas Qty...

Drill Size

 

 

 

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.

48VT-- A

Basepan Downflow (Vertical) Supply Knockout

Horizontal Duct Covers

A09076

Basepan Downflow (Vertical) Return Knockout

A09077

Fig. 8 - Supply and Return Duct Opening

3

4

3

 

4

 

 

2

1

 

2

1

 

 

 

 

 

 

 

 

 

INSTRUCTIONS FOR REMOVING DOWNSHOT PANELS

1.Score groove in corner 1 in both directions as far as you can reach.

2.Starting in corner 1, tap-out all sides with a small hammer. Be careful not to damage any other part of unit.

3.If side from corner 3 to 4 is not accessible due to heat exchanger, pivot panel up and down by hand until remaining side breaks off.

A09054

Fig. 9 - Vertical (Downflow) Discharge Duct Knockouts

9

Image 9
Contents SAFETY CONSIDERATIONS TABLE OF CONTENTSFig. 1 - Unit 48VT-A Installation InstructionsINTRODUCTION RECEIVING AND INSTALLATIONStep 1 - Check Equipment Step 2 - Provide Unit SupportFig. 2 - 48VT-A24-30Unit Dimensions 48VT--AA09146 Fig. 3 - 48VT-A36-60Unit Dimensions 48VT--AA09147 48VT Fig. 4 - Roof Curb DimensionsSMALL CURB ROOF CURB DETAILStep 5 - Rig and Place Unit ACCESS PANELS MUST BE IN PLACE WHEN RIGGINGInspection Rigging/Lifting of Unit See FigStep 8 - Install Gas Piping Step 7 - Install Flue HoodStep 6 - Connect Condensate Drain Fig. 6 - Condensate TrapConfiguring Units for Downflow Vertical Discharge Step 9 - Install Duct ConnectionsFig. 7 - Sediment Trap FIRE OR EXPLOSION HAZARDFig. 8 - Supply and Return Duct Opening Table 1 - Physical Data - Unit 48VT-A48VT--A Horizontal Duct CoversTable 2 - Maximum Gas Flow Capacity Table 1 - Physical Data - Unit 48VT-ACont’dTable 3 - Heating Inputs 48VT--ASpecial Procedures for 208-VOperation Step 10 - Install Electrical ConnectionsHigh-VoltageConnections Control Voltage ConnectionsPRE-START-UP Balance Point Setting-Thermidistator HybridTransformer Protection ThermostatSTART-UP Step 3 - Start-upHeating and Make Adjust- mentsStep 1 - Check for Refrigerant Leaks Step 2 - Unit Sequence of OperationFig. 11 - Burner Assembly Adjust Gas InputCheck Heating Control Check Gas InputCheck Burner Flame Limit SwitchesNormal Operation Airflow and Temperature RiseRollout Switch Step 4 - Start-upCooling and Make Adjust- mentsChecking and Adjusting Refrigerant Charge Indoor Airflow and Airflow AdjustmentsContinuous Fan Operation Gas Heating Fan Speed Set-upTable 6 - Color Coding for Indoor Fan Motor Leads 48VT--ATable 8 - 48VT-AWet Coil Pressure Drop Fig. 14 - Interface Fan Board IFB48VT--A Table 7 - Filter Pressure Drop Table IN. W.CUNIT 48VT--AHeating 48VT--A1295 48VT--A1445 48VT--A1448 48VT--A48VT A Fig. 15 - 208/230-1-60Wiring Diagram, Unit 48VT-AFig. 16 - 208/230-3-60Wiring Diagram, Unit 48VT-A 48VT--AA09209 48VT--A Fig. 17 - Cooling Charging Table-Subcooling50VT500173 REV A09099Cleaning the Blower Motor and Wheel MAINTENANCEAir Filter Indoor Blower and MotorInduced Draft combustion air Blower Assembly Limit SwitchFig. 18 - Blower Housing and Flue Collector Box Fig. 19 - Unit Access PanelsOutdoor Fan Electrical Controls and WiringRefrigerant Circuit Fig. 20 - Removal of Motor and Blower WheelLoss of Charge Switch Pressure SwitchesHigh-PressureSwitch Gas InputPage LCS - Loss of Charge Switch HPS - High Pressure SwitchFig. 24 - Refrigerant Circuit AccuraterMetering De viceSTART-UPCHECKLIST TROUBLESHOOTINGUNIT OPERATION AND SAFETY HAZARD Synthetic Roof Precautionary Procedure48VT--A PURONR R-410AQUICK REFERENCE GUIDE48VT--A SYMPTOMTable 12 - Troubleshooting Guide-Heating Table 13 - Troubleshooting Guide-LEDStatus Codes48VT--A I. PRELIMINARY INFORMATION MODEL NO Remove and Store in Job FilesTEMPERATURES PRESSURESCatalog No 48VT---05SI 48VT--AEdition Date 04/09 Replaces 48VT---04SI