Table 1—Physical Data 551B

BASE UNIT 551B

 

036

 

048

 

060

 

072

NOMINAL CAPACITY (nominal tons)

 

3

 

4

 

5

 

6

OPERATING WEIGHT (lb)

 

 

 

 

 

 

 

 

Unit

 

435

 

445

 

465

 

540

Perfect HumidityAdaptive Dehumidification System

 

15

 

23

 

25

 

29

EconoMi$er IV

 

50

 

50

 

50

 

50

Roof Curb

 

115

 

115

 

115

 

115

COMPRESSOR

 

 

 

Scroll

 

 

 

Quantity

 

1

 

1

 

1

 

1

Oil (oz)

 

42

 

53

 

50

 

60

REFRIGERANT TYPE

 

 

 

R-22

 

 

 

Expansion Device

 

 

 

AcutrolMetering Device

 

Operating Charge (lb-oz)

 

 

 

 

 

 

 

 

Standard Unit

 

5-8

 

10-2

 

10-0

 

12- 8

Unit With Perfect Humidity Adaptive Dehumidification System

12-5

 

18-8

 

20-5

 

23-14

CONDENSER FAN

 

 

 

Propeller

 

 

 

Quantity...Diameter (in.)

 

1...22

 

1...22

 

1...22

 

1...22

Nominal Cfm

 

3500

 

3500

 

4100

 

4100

Motor Hp...Rpm

 

1/8...825

 

1/8...825

 

1/ ...1100

 

1/ ...1100

Watts Input (Total)

 

 

 

 

 

4

 

4

 

180

 

180

 

320

 

320

CONDENSER COIL

 

 

3/8---in. OD Enhanced Copper Tubes, Aluminum Lanced Fins

 

Rows...Fins/in.

 

1...17

 

2...17

 

2...17

 

2...17

Total Face Area (sq ft)

 

14.6

 

16.5

 

16.5

 

21.3

EVAPORATOR COIL

 

3/8---in. OD Enhanced Copper Tubes, Aluminum Double-Wavy Fins

 

Standard Unit

 

 

 

 

 

 

 

 

Rows...Fins/in.

 

2...15

 

2...15

 

4...15

 

4...15

Total Face Area (sq ft)

 

5.5

 

5.5

 

5.5

 

7.3

Unit with Perfect Humidity Adaptive Dehumidification System

 

 

 

 

 

 

 

Rows...Fins/in.

 

1...17

 

2...17

 

2...17

 

2...17

Total Face Area (sq ft)

 

3.9

 

3.9

 

3.9

 

5.2

EVAPORATOR FAN

 

 

 

Centrifugal Type, Belt Drive

 

Quantity...Size (in.)

 

1...10 x 10

 

1...10 x 10

 

1...10 x 10

 

1...10 x 10

Nominal Cfm

 

1200

 

1600

 

2000

 

2400

Maximum Continuous Bhp

Std

1.20

 

1.20

 

1.30/2.40*

 

2.40

 

Hi-Static

2.40

 

2.40

 

2.90

 

2.90

Motor Frame Size

Std

48

 

48

 

56

 

56

 

Hi-Static

56

 

56

 

56

 

56

Fan Rpm Range

Std

680-1044

 

770-1185

 

1035-1460/1035---1460*

 

1120-1585

Motor Bearing Type

Hi-Static

1075-1455

 

1075-1455

 

1300-1685

 

1300-1685

 

Ball

 

Ball

 

Ball

 

Ball

Maximum Fan Rpm

Std

2100

 

2100

 

2100

 

2100

Motor Pulley Pitch Diameter A/B (in.)

1.9/2.9

 

1.9/2.9

 

2.4/3.4

 

2.4/3.4

 

Hi-Static

2.8/3.8

 

2.8/3.8

 

3.4/4.4

 

3.4/3.4

Nominal Motor Shaft Diameter (in.)

Std

1/2

 

1/2

 

5/8

 

5/8

 

Hi-Static

5/8

 

5/8

 

7/8

 

7/8

Fan Pulley Pitch Diameter (in.)

Std

4.5

 

4.0

 

4.0

 

3.7

 

Hi-Static

4.5

 

4.5

 

4.5

 

4.5

Belt — Type...Length (in.)

Std

1...A...36

 

1...A...36

 

1....4...40

 

1...A...38

Pulley Center Line Distance (in.)

Hi-Static

1...A...39

 

1...A...39

 

1...A...40

 

1...A...40

Std

10.0-12.4

 

10.0-12.4

 

14.7-15.5

 

14.7-15.5

Speed Change per Full Turn of

65

 

70

 

75

 

95

Movable Pulley Flange (rpm)

Hi-Static

65

 

65

 

60

 

60

Movable Pulley Maximum Full

Std

5

 

5

 

6

 

5

Turns from Closed Position

Hi-Static

6

 

6

 

5

 

5

Factory Setting — Full Turns Open

Std

3

 

3

 

3

 

3

 

Hi-Static

31/2

 

31/2

 

31/2

 

31/2

Factory Speed Setting (rpm)

Std

826

 

936

 

1248

 

1304

Fan Shaft Diameter at Pulley (in.)

Hi-Static

1233

 

1233

 

1396

 

1396

 

5/8

 

5/8

 

5/8

 

5/8

HIGH-PRESSURE SWITCH (psig)

 

 

 

 

 

 

 

 

Standard Compressor Internal Relief

 

 

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

 

 

 

 

Closes (F)

 

 

45

 

 

 

 

OUTDOOR-AIR INLET SCREENS

 

Cleanable. Screen quantity and size varies with option selected.

 

RETURN-AIR FILTERS

 

 

 

Throwaway

 

 

 

Quantity...Size (in.)

 

 

 

2...16 x 25 x 2

 

 

2...16 x 16 x 2

LEGEND

Bhp — Brake Horsepower *Single phase/three phase.

551B,C

9

Page 9
Image 9
Bryant 551C installation instructions Physical Data 551B, Base Unit 551B

551C, 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.