Bryant installation instructions Physical Data, Unit 551B

Page 6

Table 1 — Physical Data

UNIT 551B

090

 

102

 

 

120

 

150

NOMINAL CAPACITY (tons)

71/2

 

81/2

 

 

10

 

121/2

OPERATING WEIGHT (lb)

 

 

 

 

 

 

 

 

Unit

755

 

895

 

 

915

 

930

 

 

 

EconoMi$er IV

75

 

75

 

 

75

 

75

Perfect Humidity™ Dehumidification Package

44

 

51

 

 

51

 

51

Roof Curb

143

 

143

 

 

143

 

143

COMPRESSOR

 

 

 

Scroll

 

 

Quantity

2

 

2

 

 

2

 

2

 

 

 

Oil (oz) (each compressor)

53

 

53

 

 

50

 

60

REFRIGERANT TYPE

 

 

 

R-22

 

 

Expansion Device

 

 

Metering Device

 

 

Operating Charge (lb-oz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Standard Unit

 

 

 

 

 

 

 

 

Circuit 1

7-10

 

9- 8

 

 

9-6

 

9-8

Circuit 2

8- 2

 

8-13

 

 

10-9

 

9-5

Unit With Perfect Humidity Dehumidification Package

 

 

 

 

 

 

 

 

Circuit 1

13-0

 

16-0

 

 

16-8

 

15-3

Circuit 2

13-6

 

16-8

 

 

17-8

 

16-6

CONDENSER FAN

 

 

Propeller Type

 

 

Quantity...Diameter (in.)

2...22

 

2...22

 

 

2...22

 

2...22

 

 

 

Nominal Cfm

6500

 

6500

 

 

7000

 

7000

Motor Hp...Rpm

1/4...1100

 

1/4...1100

 

 

1/4...1100

 

1/4...1100

Watts Input (Total)

650

 

650

 

 

650

 

650

CONDENSER COIL

High-Efficiency Enhanced Copper Tubes, Lanced Aluminum Fins

Rows...Fins/in.

2...17

 

2...17

 

 

2...17

 

2...17

 

 

 

Total Face Area (sq ft)

20.5

 

25.0

 

 

25.0

 

25.0

EVAPORATOR COIL

High Efficiency Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Face Split

Standard Unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rows...Fins/in.

3...15

 

4...15

 

 

4...15

 

4...15

Total Face Area (sq ft)

8.9

 

11.1

 

 

11.1

 

11.1

Unit with Perfect Humidity Dehumidification Package

 

 

 

 

 

 

 

 

Rows...Fins/in.

2...17

 

2...17

 

 

2...17

 

2...17

Total Face Area (sq ft)

6.3

 

8.4

 

 

8.4

 

8.4

EVAPORATOR FAN

 

 

Centrifugal Type, Belt Drive

 

 

Size (in.)

15 x 15

 

15 x 15

 

 

15 x 15

 

15 x 15

 

 

 

Nominal Cfm — Standard

3000

 

3400

 

 

4000

 

5000

Maximum Continuous Bhp

 

 

 

 

 

 

 

 

Standard

2.90

 

2.90

 

 

3.70

 

5.25

High Static

4.20

 

4.20

 

 

5.25

 

Motor Frame

56

 

56

 

 

56

 

56

Fan Rpm Range

 

 

 

 

 

 

 

 

Standard

840-1085

 

840-1085

 

 

860-1080

 

830-1130

High Static

860-1080

 

860-1080

 

 

830-1130

 

Motor Bearing Type

Ball

 

Ball

 

 

Ball

 

Ball

Maximum Fan Rpm

2100

 

2100

 

 

2100

 

2100

Motor Pulley Pitch Diameter A/B (in.)

 

 

 

 

 

 

 

 

Standard

3.4/4.4

 

3.4/4.4

 

 

4.0/5.0

 

2.8/3.8

High Static

4.0/5.0

 

4.0/5.0

 

 

2.8/3.8

 

Nominal Motor Shaft Diameter (in.)

7/8

 

7/8

 

 

7/8

 

7/8

Fan Pulley Pitch Diameter (in.)

 

 

 

 

 

 

 

 

Standard

7.0

 

7.0

 

 

8.0

 

5.8

High Static

8.0

 

8.0

 

 

5.8

 

Belt — Quantity...Type...Length (in.)

 

 

 

 

 

 

 

 

Standard

1...A...48

 

1...A...51

 

 

1...A...51

 

1...BX...46

High Static

1...A...55

 

1...A...55

 

 

1...BX...46

 

Pulley Center Line Distance (in.)

16.75-19.25

 

16.75-19.25

 

 

15.85-17.50

 

15.85-17.50

Speed Change per Full Turn of

 

 

 

 

 

 

 

 

Movable Pulley Flange (rpm)

 

 

 

 

 

 

 

 

Standard

50

 

50

 

 

45

 

60

High Static

60

 

60

 

 

60

 

Movable Pulley Maximum Full Turns

 

 

 

 

 

 

 

 

From Closed Position

 

 

 

 

 

 

 

 

Standard

5

 

5

 

 

5

 

6

High Static

5

 

5

 

 

6

 

Factory Setting — Full Turns Open

5

 

5

 

 

5

 

5

Factory Speed Setting (rpm)

 

 

 

 

 

 

 

 

Standard

840

 

840

 

 

862

 

887

High Static

860

 

860

 

 

887

 

Fan Shaft Diameter at Pulley (in.)

1

 

1

 

 

1

 

1

HIGH-PRESSURE SWITCH (psig)

 

 

 

 

 

 

 

 

Standard Compressor Internal Relief (Differential)

 

 

 

450 ± 50

 

 

Cutout

 

 

 

428

 

 

Reset (Auto.)

 

 

 

320

 

 

LOSS-OF-CHARGE/LOW-PRESSURE

 

 

 

 

 

 

 

 

SWITCH (Liquid Line) (psig)

 

 

 

 

 

 

 

 

Cutout

 

 

 

7 ± 3

 

 

Reset (Auto.)

 

 

 

22 ± 5

 

 

FREEZE-PROTECTION THERMOSTAT

 

 

 

 

 

 

 

 

Opens (F)

 

 

 

30 ± 5

 

 

Closes (F)

 

 

 

45 ± 5

 

 

OUTDOOR-AIR INLET SCREENS

Cleanable. Screen size and quantity varies by options selected.

RETURN-AIR FILTERS

 

 

Throwaway

 

 

Quantity...Size (in.)

4...16 x 20 x 2

 

4...16 x 20 x 2

 

 

4...20 x 20 x 2

 

4...20 x 20 x 2

 

 

 

LEGEND

Bhp — Brake Horsepower

6

Image 6
Contents Installation ContentsSafety Considerations Provide Unit SupportIII. Install Condensate Drain Line and External Trap IV. RIG and Place UnitPositioning Roof Curb Details Weight OperatingBase Unit Dimensions Physical Data Unit 551BIFC Field Power SupplyMake Electrical Connections NECElectrical Data FLA MCA Mocp LRA HacrVoltage Comp no Electric Heater Electric Heater Usage †Used to determine minimum disconnect per NECVI. Adjust FACTORY-INSTALLED Options A. Disconnect Switch Field Control WiringHeat Anticipator Settings Perfect Humidity Dehumidification SystemAccessory Field-Installed Humidistat Convenience Outlet Manual Outdoor-Air DamperOptional EconoMi$er EconoMi$er IV Standard Sensors Hood Box RemovalOutdoor-Air Hood Construction EconoMi$er IV Control Modes EconoMi$er IV Sensor UsageEconoMi$er IV Controller Potentiometer LED Locations Enthalpy Changeover Set Points Page CO2 Sensor Standard Settings PpmMinimum Required Airflow Exceptions VII. Adjust EVAPORATOR-FAN SpeedUnit Heater Required Config UrationFan Rpm at Motor Pulley Setting* Standard Motor/Drive Fan Rpm at Motor Pulley Setting* High-Static Motor/DriveEvaporator-Fan Motor Data Standard Motor Evaporator-Fan Motor Data High-Static Motors Accessory/FIOP EconoMi$er IV Static Pressure* in. wgAccessory/FIOP Electric Heaters Static Pressure in. wg General FAN Performance NotesAirflow 901 703 1125 762 1365 832 690 1051 750 1285866 697 1088 756 1324 974 716 1204 774 1449866 489 386506 629 625 688 745 502 4241748 15671656 1844865 707 748 684 891 738 1034 789 1177805 695 953 749 1100 799 1249 760 1170 809 13231665 865 707 1018 760 1170 809 1323929 718 1086 771 1244 820 1401 1873683 1197 739 654 1040 713668 1116 726 697 1281 7531252 465 402596 629 802 694 1021 471 421944 695 1194 756 1453 823 674 1059 737 1306882 684 1125 746 1378 1009 705 1266 766 1533868 462 348467 614 594 681 728 474 3812293 996 2501 1038 2713 27162821 2930723 1577 710 14821677 808 1876 855 2081 1775 820 19781677 808 1876 1492 784 16831582 796 1777 1877628 997 685 614 929 673781 1445 791 1525PRE-START-UP Internal WiringVI. Refrigerant Service Ports START-UP Unit PreparationIX. Cooling Heating if Accessory Heater is InstalledXI. Safety Relief XII. Ventilation Continuous FANPerfect Humidity System Normal Design Cooling Operation Evaporator Coil Units With Power ExhaustService Cleaning Condenser CoilsECONOMI$ER IV Adjustment III. CONDENSER-FAN Adjustment FIGIV. BELT/PULLEY Adjustment II. LubricationCooling Charging Charts, Standard 551B090 Unit Cooling Charging Charts, Standard 551B120 Unit VII. Replacement Parts Troubleshooting Unit Troubleshooting Cooling TroubleshootingProblem Cause Remedy Will Not Energize Subcooling Mode Liquid ReheatReheat Mode Will Not Energize Low System CapacityII. ECONOMI$ER IV Troubleshooting Inputs Outputs EconoMi$er IV Troubleshooting CompletionEconoMi$er IV Input/Output Logic Demand Control EnthalpyOperating sequence Cooling EconoMi$er Heating IndexPage Preliminary Information START-UP ChecklistTemperatures 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.