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Field-fabricated ductwork – Carrier NP034-074 User Manual

Page 6

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Table 2 — Operating Weights of Options and Accessories

OPTION OR ACCESSORY

UNIT SIZE

034

044

054

064

074

Roof Curb

48DJ,DK,NP
50DW,DY,NB
50DJ,DK,NP

450
450
380

480
480
465

515
560
515

515
560
515

515
560
515

Condenser Section Roof Curb

540

540

625

Economizer

300*

300*

530*

530*

530*

Power Exhaust

600*

600*

710*

710*

710*

Barometric Relief

200

200

200

200

200

High-Efficiency Filters

20

20

20

20

20

Bag filters

35

35

40

40

40

Hail Guard

120

150

145

145

210

Copper Condenser Coil Fins

180

235

235

235

420

Electric Heat†

150

150

150

150

150

Inlet Guide Vanes

95

95

115

115

115

*Includes hood.

†50 Series vertical discharge units.

Field-Fabricated Ductwork —

Units are designed for

vertical supply/return only. Field-fabricated ductwork should
be attached to the roof curb. Supply and return duct dimen-
sions are shown in Fig. 3A-3C.

To attach ductwork to roof curb, insert duct approxi-

mately 10 to 11 in. up into roof curb. Connect ductwork to
14-gage roof curb material with sheet metal screws driven
from inside of the duct.

Secure all ducts to the building structure, using flexible

duct connectors between roof curb and ducts as required. Ducts
passing through an unconditioned space must be insulated
and covered with a vapor barrier. Outlet grilles must not lie
directly below unit discharge. The return duct must have a
90-degree elbow before opening into the building space if
unit is equipped with power exhaust.

Design supply duct strong enough to handle expected static

pressures.

UNIT CENTER OF GRAVITY AND CORNER WEIGHTS

UNIT

CORNER WEIGHT (lb)

DIMENSIONS (Ft-in.)

1

2

3

4

A

B

48DJD,DKD,NPD

034

1754

1213

1216

1758

14- 9

3- 8

044

2035

1382

1385

2039

17- 3

3- 8

054

2334

2276

2281

2339

19- 7

3-10

064

2431

2328

2334

2437

19- 7

3-10

074

2452

2518

2523

2457

21- 0

3-10

48DJE,NPE

034

1781

1251

1253

1785

14- 8

3-10

044

2057

1424

1428

2061

17- 2

3-10

054

2375

2295

2300

2380

19- 7

3-10

064

2393

2373

2378

2506

19- 7

3-10

074

2494

2541

2546

2499

21- 0

3-10

50DW,DY,NB

034

1864

1268

1271

1867

13- 3

3-10

044

2070

1387

1389

2074

15-10

3-10

054

2381

2005

2009

2385

19-10

3-10

064

2461

2074

2078

2467

19-10

3-10

074

2551

2194

2199

2556

21- 3

3-10

50DJ,DK,NP

034

1674

1173

1175

1678

13- 9

3-10

044

1879

1292

1295

1884

16- 3

3-10

054

2090

2021

2025

2094

18- 2

3-10

064

2188

2073

2077

2192

18- 2

3-10

074

2212

2263

2269

2216

21- 3

3-10

NOTE: Weights include economizer.

Fig. 2 — Weight Distribution and Center of Gravity

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