581B036-150

PERFORMANCE DATA (cont)

FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)

581B090 (71/2 TONS) — STANDARD MOTOR (BELT DRIVE)*

Airflow

 

 

 

 

 

External Static Pressure (in. wg)

 

 

 

 

 

 

0.2

 

 

0.4

 

 

0.6

 

 

0.8

 

 

1.0

 

(Cfm)

 

 

 

 

 

 

 

 

 

 

 

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

2250

505

0.52

484

586

0.73

681

657

0.97

901

722

1.22

1142

782

1.50

1403

2300

513

0.55

509

592

0.76

708

663

1.00

931

727

1.26

1174

787

1.54

1437

2400

527

0.60

561

605

0.82

766

674

1.07

993

738

1.33

1241

796

1.62

1508

2500

543

0.66

617

618

0.89

828

686

1.14

1060

748

1.41

1312

806

1.70

1583

2550

550

0.69

647

625

0.92

860

692

1.17

1095

754

1.45

1349

811

1.74

1623

2600

558

0.73

677

632

0.96

894

698

1.21

1131

759

1.49

1388

816

1.78

1664

2700

574

0.80

742

645

1.03

964

710

1.29

1207

770

1.58

1469

826

1.88

1749

2800

589

0.87

811

659

1.11

1039

723

1.38

1287

782

1.67

1554

837

1.97

1839

2900

605

0.95

885

673

1.20

1119

736

1.47

1372

794

1.76

1644

848

2.07

1933

3000

621

1.03

963

688

1.29

1204

749

1.57

1463

806

1.87

1740

859

2.18

2033

3100

637

1.12

1046

702

1.39

1293

762

1.67

1558

818

1.97

1840

871

2.29

2139

3200

654

1.22

1135

717

1.49

1388

776

1.78

1658

831

2.09

1946

882

2.41

2249

3300

670

1.32

1228

732

1.60

1488

789

1.89

1764

843

2.21

2057

894

2.54

2365

3400

686

1.42

1328

747

1.71

1593

803

2.01

1876

856

2.33

2174

907

2.67

2488

3500

703

1.54

1433

762

1.83

1705

817

2.14

1993

870

2.46

2297

919

2.81

2616

3600

720

1.66

1543

777

1.95

1822

832

2.27

2116

883

2.60

2425

3700

736

1.78

1660

793

2.09

1944

846

2.41

2245

896

2.75

2560

3750

745

1.85

1721

801

2.15

2008

853

2.48

2312

903

2.82

2630

581B090 (71/2 TONS) — STANDARD MOTOR (BELT DRIVE)* (cont)

Airflow

 

 

 

 

 

External Static Pressure (in. wg)

 

 

 

 

 

 

1.2

 

 

1.4

 

 

1.6

 

 

1.8

 

 

2.0

 

(Cfm)

 

 

 

 

 

 

 

 

 

 

 

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

Rpm

Bhp

Watts

2250

838

1.81

1683

891

2.12

1981

941

2.46

2297

988

2.82

2629

2300

842

1.84

1719

895

2.17

2019

944

2.51

2336

992

2.86

2669

2400

851

1.92

1793

903

2.25

2097

952

2.59

2416

2500

860

2.01

1873

911

2.34

2180

960

2.68

2502

2550

865

2.05

1914

916

2.38

2223

964

2.73

2547

2600

869

2.10

1957

920

2.43

2267

968

2.78

2593

2700

879

2.19

2046

929

2.53

2360

976

2.88

2689

2800

889

2.29

2140

938

2.64

2458

2900

899

2.40

2239

948

2.75

2561

3000

910

2.51

2343

958

2.86

2670

3100

921

2.63

2453

3200

932

2.75

2569

3300

943

2.88

2690

3400

3500

3600

3700

3750

LEGEND

Bhp — Brake Horsepower Input to Fan

Watts — Input Watts to Motor

*Motor drive range: 840 to 1085 rpm. All other rpms require field-supplied drive.

See page 103 for general fan performance notes.

NOTES:

1.Boldface indicates field-supplied drive is required.

2.Maximum continuous bhp is 2.90.

120

Page 120
Image 120
Bryant 581A/B manual 581B090 71/2 Tons Standard Motor Belt Drive

581A/B specifications

The Bryant 581A/B is a sophisticated rooftop unit designed for commercial heating and cooling applications, striking a balance between performance, efficiency, and versatility. This unit is engineered to cater to various building sizes and configurations, making it an excellent choice for businesses seeking reliable climate control solutions.

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