Bryant 551B 832 690 1051 750 1285, 866 697 1088 756 1324, 901 703 1125 762 1365, 1900, 2004, 2114

Page 25

Table 16 — Fan Performance 551B090 — Vertical Discharge Units; High-Static 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

511

0.53

492

591

0.73

680

660

0.95

885

722

1.19

1106

779

1.44

1342

2300

519

0.56

518

597

0.76

709

666

0.98

916

727

1.22

1140

784

1.48

1378

2400

534

0.61

571

611

0.82

768

678

1.05

982

739

1.30

1210

795

1.56

1453

2500

550

0.67

629

624

0.89

832

690

1.13

1051

750

1.38

1285

805

1.64

1533

2550

558

0.71

660

631

0.93

866

697

1.17

1088

756

1.42

1324

811

1.69

1574

2600

565

0.74

691

638

0.97

901

703

1.21

1125

762

1.46

1365

816

1.73

1617

2700

581

0.81

758

652

1.04

974

716

1.29

1204

774

1.55

1449

828

1.83

1707

2800

597

0.89

829

667

1.13

1051

729

1.38

1287

786

1.65

1538

839

1.93

1801

2900

613

0.97

905

681

1.22

1133

742

1.48

1376

799

1.75

1632

851

2.04

1900

3000

630

1.06

985

696

1.31

1220

756

1.58

1469

811

1.86

1731

863

2.15

2004

3100

646

1.15

1071

711

1.41

1313

770

1.68

1568

824

1.97

1835

875

2.27

2114

3200

663

1.25

1162

726

1.51

1411

784

1.79

1672

837

2.09

1944

888

2.39

2229

3300

679

1.35

1259

741

1.62

1514

798

1.91

1781

851

2.21

2060

900

2.52

2351

3400

696

1.46

1361

756

1.74

1623

812

2.03

1896

864

2.34

2181

913

2.66

2478

3500

713

1.58

1469

772

1.86

1737

827

2.16

2017

878

2.48

2308

926

2.80

2610

3600

729

1.70

1583

787

1.99

1857

841

2.30

2144

892

2.62

2441

939

2.95

2749

3700

746

1.83

1703

803

2.13

1985

856

2.44

2277

906

2.77

2580

953

3.10

2894

3750

755

1.89

1766

811

2.20

2051

864

2.52

2346

913

2.84

2653

959

3.18

2969

 

 

 

 

 

 

 

 

 

 

 

 

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

832

1.71

1592

882

1.99

1855

928

2.29

2131

973

2.59

2420

1015

2.92

2720

2300

837

1.75

1630

886

2.03

1896

933

2.33

2174

977

2.64

2463

1020

2.97

2766

2400

847

1.83

1710

896

2.12

1980

942

2.43

2262

986

2.74

2556

1028

3.07

2861

2500

857

1.92

1794

905

2.22

2069

951

2.52

2355

995

2.84

2653

1037

3.18

2962

2550

862

1.97

1838

910

2.27

2114

956

2.58

2403

999

2.90

2704

1041

3.23

3014

2600

867

2.02

1884

915

2.32

2162

961

2.63

2453

1004

2.95

2755

1045

3.29

3068

2700

878

2.12

1978

926

2.42

2261

971

2.74

2556

1013

3.07

2862

1055

3.41

3180

2800

889

2.23

2077

936

2.54

2365

981

2.86

2664

1023

3.19

2975

1064

3.54

3297

2900

900

2.34

2181

947

2.65

2474

991

2.98

2778

1033

3.32

3094

1073

3.67

3419

3000

912

2.46

2290

958

2.78

2588

1001

3.11

2897

1043

3.45

3217

1083

3.80

3547

3100

923

2.58

2406

969

2.90

2708

1012

3.24

3022

1053

3.59

3347

1093

3.95

3682

3200

935

2.71

2526

980

3.04

2834

1023

3.38

3152

1064

3.73

3482

1103

4.10

3821

3300

947

2.84

2652

992

3.18

2966

1034

3.53

3289

1075

3.89

3623

3400

959

2.99

2785

1003

3.33

3103

1045

3.68

3432

1086

4.04

3771

3500

972

3.13

2923

1015

3.48

3246

1057

3.84

3581

3600

984

3.29

3068

1027

3.64

3396

1068

4.01

3736

3700

997

3.45

3218

1040

3.81

3553

1080

4.18

3897

3750

1004

3.54

3296

1046

3.90

3633

LEGEND

Bhp — Brake Horsepower Input to Fan Watts — Input Watts to Motor

*Motor drive range: 860 to 1080 rpm. All other rpms require field- supplied drive.

NOTES:

1.Boldface indicates field-supplied drive is required.

2.Maximum continuous bhp is 4.20.

3.See page 23 for general fan performance notes.

25

Image 25
Contents Safety Considerations ContentsInstallation Provide Unit SupportIV. RIG and Place Unit III. Install Condensate Drain Line and External TrapPositioning Roof Curb Details Operating WeightBase Unit Dimensions Unit 551B Physical DataMake Electrical Connections Field Power SupplyIFC NECFLA MCA Mocp LRA Hacr Electrical DataVoltage Comp no Electric Heater †Used to determine minimum disconnect per NEC Electric Heater UsageHeat Anticipator Settings Field Control WiringVI. Adjust FACTORY-INSTALLED Options A. Disconnect Switch Perfect Humidity Dehumidification SystemAccessory Field-Installed Humidistat Manual Outdoor-Air Damper Convenience OutletOptional EconoMi$er Hood Box Removal EconoMi$er IV Standard SensorsOutdoor-Air Hood Construction EconoMi$er IV Sensor Usage EconoMi$er IV Control ModesEconoMi$er IV Controller Potentiometer LED Locations Enthalpy Changeover Set Points Page Ppm CO2 Sensor Standard SettingsUnit Heater Required Config VII. Adjust EVAPORATOR-FAN SpeedMinimum Required Airflow Exceptions UrationFan Rpm at Motor Pulley Setting* High-Static Motor/Drive Fan Rpm at Motor Pulley Setting* Standard Motor/DriveEvaporator-Fan Motor Data Standard Motor Accessory/FIOP Electric Heaters Static Pressure in. wg Accessory/FIOP EconoMi$er IV Static Pressure* in. wgEvaporator-Fan Motor Data High-Static Motors General FAN Performance NotesAirflow 866 697 1088 756 1324 832 690 1051 750 1285901 703 1125 762 1365 974 716 1204 774 1449506 629 625 688 745 489 386866 502 4241656 15671748 1844805 695 953 749 1100 799 1249 748 684 891 738 1034 789 1177865 707 760 1170 809 1323929 718 1086 771 1244 820 1401 865 707 1018 760 1170 809 13231665 1873668 1116 726 654 1040 713683 1197 739 697 1281 753596 629 802 694 1021 465 4021252 471 421882 684 1125 746 1378 823 674 1059 737 1306944 695 1194 756 1453 1009 705 1266 766 1533467 614 594 681 728 462 348868 474 3812821 27162293 996 2501 1038 2713 29301677 808 1876 855 2081 710 1482723 1577 1775 820 19781582 796 1777 1492 784 16831677 808 1876 1877781 1445 614 929 673628 997 685 791 1525VI. Refrigerant Service Ports Internal WiringPRE-START-UP START-UP Unit PreparationXI. Safety Relief Heating if Accessory Heater is InstalledIX. Cooling XII. Ventilation Continuous FANPerfect Humidity System Normal Design Cooling Operation Service Cleaning Units With Power ExhaustEvaporator Coil Condenser CoilsIV. BELT/PULLEY Adjustment III. CONDENSER-FAN Adjustment FIGECONOMI$ER IV Adjustment II. LubricationCooling Charging Charts, Standard 551B090 Unit Cooling Charging Charts, Standard 551B120 Unit VII. Replacement Parts Cooling Troubleshooting Troubleshooting Unit TroubleshootingProblem Cause Remedy Reheat Mode Will Not Energize Subcooling Mode Liquid ReheatWill Not Energize Low System CapacityII. ECONOMI$ER IV Troubleshooting EconoMi$er IV Input/Output Logic EconoMi$er IV Troubleshooting CompletionInputs Outputs Demand Control EnthalpyIndex Operating sequence Cooling EconoMi$er HeatingPage Temperatures START-UP ChecklistPreliminary Information III. START-UP Electrical
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551B specifications

The Bryant 551B and 551C are two highly efficient air conditioning units designed to provide optimal comfort in residential settings. Known for their reliability and performance, these models are part of Bryant's esteemed line of heating and cooling solutions.

One of the standout features of the Bryant 551B is its two-stage cooling system, which allows for better humidity control and increased comfort. This ensures that homeowners can enjoy consistent temperatures while reducing energy consumption. The unit operates quietly, thanks to its noise-reducing technology, making it an ideal choice for bedrooms and living spaces.

On the other hand, the Bryant 551C builds upon this foundation with its variable-speed compressor. This technology allows the unit to adjust its cooling output according to the specific needs of the home. This results in seamless operation and even greater energy efficiency. Both models also incorporate Bryant's advanced control capabilities, which allow users to monitor and adjust settings remotely via smart devices, adding a layer of convenience and modernity to home climate control.

With an emphasis on durability, both the 551B and 551C feature a galvanized steel cabinet that protects against weather-related damage. The powder coat finish further enhances their resistance to rust and corrosion, ensuring a long lifespan and minimal maintenance.

Another significant characteristic of these units is their excellent Seasonal Energy Efficiency Ratio (SEER) ratings. The 551B boasts a SEER rating of up to 16, while the 551C takes it even further with ratings exceeding 20. This efficiency not only translates to lower energy bills for homeowners but also contributes to a reduced carbon footprint, making these units environmentally friendly options.

Both models are also designed to operate with eco-friendly refrigerants, aligning with modern energy standards and regulations aimed at reducing greenhouse gas emissions.

In summary, the Bryant 551B and 551C are exemplary choices for homeowners looking for reliable, efficient, and high-performing air conditioning solutions. With features such as two-stage and variable-speed compressors, advanced smart technology, and robust construction, these models stand out in the competitive HVAC market. They promise a comfortable indoor environment along with significant energy savings, making them a wise investment for the future.