Bryant 558D installation instructions Belt Drive Motors, Ventilation Sequence

Page 27

Table 18 Ð 558D072 Air Delivery Ð Horizontal Discharge Units (Standard Motor)

 

 

 

 

 

 

 

 

 

 

 

 

STANDARD BELT DRIVE MOTOR

 

 

 

 

 

 

 

 

 

 

 

AIRFLOW

 

 

 

 

 

 

 

 

 

 

 

External Static Pressure (in. wg)

 

 

 

 

 

 

 

 

 

 

 

(Cfm)

 

0.1

 

0.2

 

0.4

 

0.6

 

0.8

1.0

 

1.2

 

1.4

 

 

1.6

 

Rpm

 

Watts

Rpm

 

Watts

Rpm

 

Watts

Rpm

 

Watts

Rpm

 

Watts

Rpm

 

Watts

Rpm

 

Watts

Rpm

 

Watts

 

Rpm

 

Watts

1800

765

 

487

821

 

532

923

 

638

1019

 

843

1099

 

883

1178

 

1031

1249

 

1182

1316

 

1353

 

1382

 

1526

1900

802

 

539

854

 

585

953

 

700

1046

 

835

1126

 

965

1201

 

1106

1274

 

1275

1338

 

1439

 

1402

 

1621

2000

840

 

600

888

 

646

984

 

771

1073

 

907

1154

 

1047

1226

 

1990

1297

 

1361

1363

 

1534

 

1424

 

1718

2100

878

 

669

923

 

716

1015

 

843

1101

 

981

1182

 

1140

1252

 

1292

1320

 

1456

1388

 

1639

 

1448

 

1831

2200

916

 

739

958

 

795

1046

 

924

1129

 

1072

1209

 

1241

1280

 

1404

1345

 

1569

1410

 

1744

 

1473

 

1945

2300

954

 

827

993

 

883

1079

 

1022

1160

 

1173

1237

 

1344

1309

 

1517

1372

 

1691

1434

 

1866

 

1496

 

2067

2400

993

 

916

1029

 

973

1112

 

1123

1190

 

1275

1264

 

1447

1336

 

1639

1400

 

1823

1459

 

1997

 

1519

 

2188

2500

1031

 

1022

1066

 

1081

1145

 

1241

1220

 

1396

1292

 

1569

1363

 

1770

1428

 

1962

1486

 

2145

 

1543

 

2335

2600

1070

 

1131

1103

 

1199

1179

 

1353

1251

 

1517

1322

 

1700

1390

 

1901

1456

 

2102

1514

 

2300

 

1569

 

2487

2700

1109

 

1258

1140

 

1318

1212

 

1482

1283

 

1656

1352

 

1849

1418

 

2041

1483

 

2257

1543

 

2462

 

Ð

 

Ð

2800

1148

 

1396

1177

 

1465

1246

 

1621

1316

 

1805

1383

 

1997

1446

 

2188

1510

 

2403

Ð

 

Ð

 

Ð

 

Ð

2900

1188

 

1543

1215

 

1604

1281

 

1770

1349

 

1962

1413

 

2154

1476

 

2352

1537

 

2562

Ð

 

Ð

 

Ð

 

Ð

3000

1227

 

1700

1253

 

1770

1316

 

1936

1382

 

2136

1444

 

2317

1506

 

2529

Ð

 

Ð

Ð

 

Ð

Ð

 

Ð

 

NOTES:

1.Boldface indicates ®eld-supplied drive required. (See Note 7.)

2. indicates ®eld-supplied motor and drive are required.

3.indicates maximum usable watts of a factory-supplied motor.

4.Maximum usable watts input is 2120. Extensive motor and electrical testing on these units ensures that the full range of the motor can be utilized with con®dence. Using your fan motors up to the wattage ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Table 4.

5.Values include losses for ®lters, unit casing, and wet coils.

6.Use of a ®eld-supplied motor may affect wire sizing. Contact your distributor to verify.

7.Standard motor drive range: 1070 to 1460. All other rpms require ®eld-supplied drive.

8.To convert watts to bhp:

bhp =

watts input x motor efficiency

746

Motor efficiency = .84

B. Belt Drive Motors

Fan motor pulleys are factory set for speed shown in Table 1.

To change fan speed:

1.Shut off unit power supply.

2.Loosen belt by loosening fan motor mounting nuts. See Fig. 34.

3.Loosen movable pulley ¯ange setscrew (see Fig. 35).

4.Screw movable ¯ange toward ®xed ¯ange to increase speed and away from ®xed ¯ange to decrease speed. Increas- ing fan speed increases load on motor. Do not exceed maxi- mum speed speci®ed in Table 1.

5.Set movable ¯ange at nearest keyway of pulley hub and tighten setscrew. (See Table 1 for speed change for each full turn of pulley ¯ange.)

To align fan and motor pulleys:

1.Loosen fan pulley setscrews.

2.Slide fan pulley along fan shaft.

3.Make angular alignment by loosening motor from mounting.

To adjust belt tension:

1.Loosen fan motor nuts.

2.Slide motor mounting plate away from fan scroll for proper belt tension (1¤2-in. de¯ection with one ®nger).

3.Tighten motor mounting nuts.

4.Adjust lock bolt and nut on mounting plate to secure motor in ®xed position.

C.Ventilation Sequence

If unit is equipped with economizer, the damper will open to the minimum position whenever the evaporator fan runs.

MOTOR MOUNTING

NUTS AND BOLTS

Fig. 34 Ð Belt-Drive Motor Mounting

Fig. 35 Ð Evaporator-Fan Pulley Adjustment

Ð27Ð

Image 27
Contents Installation Important Ð Read Before InstallingContents Safety ConsiderationsWeight Durablade Parablade STD Unit Economizer Weight Corner WeightII. Unit Duct Connections Locate the UnitClearance Slab Mount Horizontal Units OnlyCRRFCURB001A00 AccessoryRoof Curb Unit SizeSpecications Field Duct Connections Maximum Allowable DifferenceIV. Field Connections External Trap Condensate DrainInternal Trap Condensate Drain Low-Voltage Connections Typical Component Location RLA LRA FLA Electrical DataSize TypeRLA HacrMocp NECOptional Outdoor-Air Damper Installation Accessory InstallationOptional Parablade Economizer Optional Durablade EconomizerHorizontal Durablade Economizer Installation Degree Rotation Outdoor-Air Thermostat Enthalpy Control Installation AT 50% RH Control Control Point Approx CurvePRE-START-UP START-UP Heating Section START-UP and AdjustmentsII. Cooling Section START-UP and Adjustments III. Indoor Airflow and Airflow Adjustments Fan Rpm at Motor Pulley SettingsDirect Drive Motors Motor Data Standard Direct Drive Motor AirflowESP Alternate Belt Drive Motor Airflow 1400 610 252 673 315 732 378 791 441 Cfm Rpm WattsWatts Rpm 1200 542 168 616 221 678 278 739 336 1300 576 210 644 263 704 326 764 389Standard Belt Drive Motor Airflow Ð24Ð 1500 609 273 670 326 729 394 788 462 Watts Rpm 1200 514 158 590 210 657 263 723 315 828 4411300 545 189 615 242 680 305 744 368 1400 577 221 642 284 704 347 766 4101364 1676 1432 1931 1800 765 460 821 521 Cfm Rpm Watts 1500 658 276 722 337 840 4701343 1615 1431 1829 1600 693 327 754 388 867 531 1350 1645 1424 1921 1700 729 388 787 450 895 593Ventilation Sequence Belt Drive MotorsEvaporator Coil Care and MaintenanceService Cleaning AIR FilterFan-Motor Bearings III. CONDENSER-FAN Adjustment FigII. Lubrication CompressorsIV. Refrigerant Charge Replacement PartsCooling Charging Chart 558D036 Cooling Troubleshooting TroubleshootingDamper does not Durablade Economizer TroubleshootingEnthalpy readings Parablade Economizer TroubleshootingCAP AHALSM MTRPage Page Call for Free Catalog Service TrainingPage Pressures TemperaturesPreliminary Information III. START-UP Electrical

558D specifications

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