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

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Bryant installation instructions Physical Data, Unit 551B

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.