Carrier 48VT(N) Physical Data - Unit 48VT-ACont’d, Maximum Gas Flow Capacity, Heating Inputs

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

48VT-- A

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

 

 

 

 

 

 

 

 

 

UNIT SIZE

 

048090

048115

048130

 

060090

060115

060130

NOMINAL CAPACITY ---

ton

 

4

 

4

 

4

 

 

5

 

5

 

5

SHIPPING WEIGHT---

lb

513

513

513

 

543

543

546

 

 

(kg)

233

233

233

 

246

246

246

COMPRESSORS

 

 

 

 

 

 

Scroll

 

 

 

 

 

Quantity

 

 

 

 

 

 

1

 

 

 

 

 

 

REFRIGERANT (R 410A)---

17.0

17.0

17.0

 

16.0

16.0

16.0

Quantity ---

lb

 

 

 

 

(kg )

 

 

7.7

 

7.7

 

7.7

 

 

7.3

 

7.3

 

7.3

REFRIGERANT METERING DEVICE

 

 

 

 

 

TXV

 

 

 

 

 

 

OUTDOOR ORIFICE in. (qty)---

 

 

0.040 (2)

 

 

 

 

 

0.049 (2)

 

 

 

 

(mm)

 

 

1.02

 

 

 

 

 

1.24

 

 

OUTDOOR COIL

 

2

...21

2

...21

2

...21

 

2

...21

2

...21

2

...21

Rows...Fins--- in.

 

 

Face Area---

sq ft

 

19.4

19.4

19.4

 

23.3

23.3

23.3

OUTDOOR FAN

 

3500

3500

3500

 

3800

3800

3800

Nominal Cfm

 

 

Diameter---

in.

 

 

22

 

22

 

22

 

 

22

 

22

 

22

 

 

(mm)

559

559

559

 

559

559

559

Motor Hp---

Rpm

 

1/4 (1100)

1/4 (1100)

1/4 (1100)

 

1/3 (1100)

1/3 (1100)

1/3 (1100)

INDOOR COIL

 

3

...17

3

...17

3

...17

 

4

...17

4

...17

4

...17

Rows...Fins--- in.

 

 

Face Area---

sq ft

 

 

5.7

 

5.7

 

5.7

 

 

5.7

 

5.7

 

5.7

INDOOR BLOWER

 

1600

1600

1600

 

1750

1750

1750

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

 

Propane GasQty...

Drill Size

3

...53

3

...51

3

...49

 

3

...53

3

...51

3

...49

HIGH --- PRESSURE SWITCH (psig)

 

 

 

 

 

650 +/ ---

15

 

 

 

 

 

Cut---

out

 

 

 

 

 

 

 

 

 

 

 

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.)

(3.0)

(6.1)

(9.1)

(12.2)

(15.2)

(18.3)

(21.3)

(24.4)

(27.4)

(30.5)

(31.1)

(45.7)

(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 the NFGC NFPA 54/ANSI.

† 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

10.011.0

60,000

 

2

4.0

 

13.0

11.0

 

13.0

3.23.8

10.011.0

90,000

 

3

4.0

 

13.0

11.0

 

13.0

3.23.8

10.011.0

115,000

 

3

4.0

 

13.0

11.0

 

13.0

3.23.8

10.011.0

130,000

 

3

4.0

 

13.0

11.0

 

13.0

3.23.8

10.011.0

*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 th e U.S.A. for altitudes above 2000 ft (610 m), reduce input rating 4 percent for each additional 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 Fig. 1 - Unit 48VT-A TABLE OF CONTENTSSAFETY CONSIDERATIONS Installation InstructionsStep 1 - Check Equipment RECEIVING AND INSTALLATIONINTRODUCTION Step 2 - Provide Unit Support48VT--A Fig. 2 - 48VT-A24-30Unit DimensionsA09146 48VT--A Fig. 3 - 48VT-A36-60Unit DimensionsA09147 SMALL CURB Fig. 4 - Roof Curb Dimensions48VT ROOF CURB DETAILInspection ACCESS PANELS MUST BE IN PLACE WHEN RIGGINGStep 5 - Rig and Place Unit Rigging/Lifting of Unit See FigStep 6 - Connect Condensate Drain Step 7 - Install Flue HoodStep 8 - Install Gas Piping Fig. 6 - Condensate TrapFig. 7 - Sediment Trap Step 9 - Install Duct ConnectionsConfiguring Units for Downflow Vertical Discharge FIRE OR EXPLOSION HAZARD48VT--A Table 1 - Physical Data - Unit 48VT-AFig. 8 - Supply and Return Duct Opening Horizontal Duct CoversTable 3 - Heating Inputs Table 1 - Physical Data - Unit 48VT-ACont’dTable 2 - Maximum Gas Flow Capacity 48VT--AHigh-VoltageConnections Step 10 - Install Electrical ConnectionsSpecial Procedures for 208-VOperation Control Voltage ConnectionsTransformer Protection Balance Point Setting-Thermidistator HybridPRE-START-UP ThermostatStep 1 - Check for Refrigerant Leaks Step 3 - Start-upHeating and Make Adjust- mentsSTART-UP Step 2 - Unit Sequence of OperationCheck Heating Control Adjust Gas InputFig. 11 - Burner Assembly Check Gas InputNormal Operation Limit SwitchesCheck Burner Flame Airflow and Temperature RiseChecking and Adjusting Refrigerant Charge Step 4 - Start-upCooling and Make Adjust- mentsRollout Switch Indoor Airflow and Airflow AdjustmentsTable 6 - Color Coding for Indoor Fan Motor Leads Gas Heating Fan Speed Set-upContinuous Fan Operation 48VT--A48VT--A Fig. 14 - Interface Fan Board IFBTable 8 - 48VT-AWet Coil Pressure Drop Table 7 - Filter Pressure Drop Table IN. W.C48VT--A UNIT48VT--A Heating48VT--A 129548VT--A 144548VT--A 1448Fig. 15 - 208/230-1-60Wiring Diagram, Unit 48VT-A 48VT A48VT--A Fig. 16 - 208/230-3-60Wiring Diagram, Unit 48VT-AA09209 50VT500173 REV Fig. 17 - Cooling Charging Table-Subcooling48VT--A A09099Air Filter MAINTENANCECleaning the Blower Motor and Wheel Indoor Blower and MotorFig. 18 - Blower Housing and Flue Collector Box Limit SwitchInduced Draft combustion air Blower Assembly Fig. 19 - Unit Access PanelsRefrigerant Circuit Electrical Controls and WiringOutdoor Fan Fig. 20 - Removal of Motor and Blower WheelHigh-PressureSwitch Pressure SwitchesLoss of Charge Switch Gas InputPage Fig. 24 - Refrigerant Circuit HPS - High Pressure SwitchLCS - Loss of Charge Switch AccuraterMetering De viceUNIT OPERATION AND SAFETY HAZARD TROUBLESHOOTINGSTART-UPCHECKLIST Synthetic Roof Precautionary ProcedurePURONR R-410AQUICK REFERENCE GUIDE 48VT--ASYMPTOM 48VT--ATable 13 - Troubleshooting Guide-LEDStatus Codes Table 12 - Troubleshooting Guide-Heating48VT--A TEMPERATURES Remove and Store in Job FilesI. PRELIMINARY INFORMATION MODEL NO PRESSURESEdition Date 04/09 48VT--ACatalog No 48VT---05SI Replaces 48VT---04SI