PHYSICAL DATA — 551A155,180

UNIT 551A

 

155

 

180

 

 

 

NOMINAL CAPACITY (tons)

 

13

 

15

 

 

 

OPERATING WEIGHT (lb)

 

 

 

 

 

 

 

Unit

 

 

 

 

 

 

 

Al/Al*

 

1575

 

1650

 

 

 

Al/Cu*

 

1725

 

1800

 

 

 

Cu/Cu*

 

1855

 

1930

 

 

 

EconoMi$er

 

110

 

110

 

 

 

Roof Curb†

 

200

 

200

 

 

 

Perfect Humidity™ Dehumidification Package

 

40

 

40

 

 

 

COMPRESSOR

 

 

 

 

 

 

 

Quantity...Model (Ckt 1, Ckt 2)

 

1...ZR72KC, 1...ZR57KC

 

1...ZR94KC, 1...ZR72KC

 

 

 

Number of Refrigerant Circuits

 

2

 

2

 

 

 

Loading (% of full capacity)

 

0,56,100

 

0,60,100

 

 

 

Oil (oz) (Ckt 1, Ckt 2)

 

60, 66

 

85, 60

 

 

 

REFRIGERANT TYPE

 

R-

22

 

 

 

 

Expansion Device

 

TXV

 

 

 

 

Operating Charge (lb)**

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Circuit 1

 

20.7

 

19.5

 

 

 

Circuit 2

 

11.9

 

13.45

 

 

 

CONDENSER COIL

 

Cross-Hatched 3/ -in. Copper Tubes,

Aluminum Lanced, Aluminum Pre-Coated,

 

 

 

 

 

8

 

 

 

 

 

 

 

or Copper Plate Fins

 

 

 

Rows...Fins/in.

 

4...15

 

4...15

 

 

 

Total Face Area (sq ft)

 

21.7

 

21.7

 

 

 

CONDENSER FAN

 

Propeller

Type

 

 

 

 

Nominal Cfm

 

10,500

 

10,500

 

 

 

Quantity...Diameter (in.)

 

322

 

3...22

 

 

 

Motor Hp...Rpm

 

1/ ...1050

 

1/ ...1050

 

 

 

Watts Input (Total)

 

2

 

2

 

 

 

 

1100

 

1100

 

 

 

EVAPORATOR COIL

 

Cross-Hatched 3/ -in. Copper Tubes,

Aluminum Lanced or Copper Plate Fins,

 

 

 

 

 

8

 

 

 

 

 

 

 

Face Split

 

 

 

 

Rows...Fins/in.

 

4...15

 

4...15

 

 

 

Total Face Area (sq ft)

 

17.5

 

17.5

 

 

 

EVAPORATOR FAN

 

Centrifugal

Type

 

 

 

 

Quantity...Size (in.)

 

2...10 x 10

 

2...12 x 12

 

 

 

Type Drive

 

Belt

 

Belt

 

 

 

Nominal Cfm

 

5200

 

6000

 

 

 

Std Motor Hp

 

2.9

 

5

 

 

 

Opt Motor Hp

 

3.7

 

 

 

 

 

Motor Nominal Rpm

 

1725

 

1745

 

 

 

Std Maximum Continuous Bhp

 

3.13

 

6.13

 

 

 

Opt Maximum Continuous Bhp

 

4.38

 

N/A

 

 

 

Motor Frame Size

 

56H

 

184T

 

 

 

Fan Rpm Range

Low-Medium Static

834-1064

 

873-1021

 

 

 

Motor Bearing Type

High Static

1161-1426

 

1025-1200

 

 

 

 

Ball

 

Ball

 

 

 

Maximum Allowable Rpm

 

1,550

 

1,550

 

 

 

Motor Pulley Pitch Dia.

Low-Medium Static

3.1/4.1

 

4.9/5.9

 

 

 

Nominal Motor Shaft Diameter (in.)

High Static

3.7/4.7

 

4.9/5.9

 

 

 

 

7/

 

11/

 

 

 

Fan Pulley Pitch Diameter (in.)

Low-Medium Static

8

 

8

 

 

 

6.0

 

9.4

 

 

 

Nominal Fan Shaft Diameter (in.)

High Static

5.2

 

8.0

 

 

 

 

13/

 

17/

 

 

 

Belt, Quantity...Type...Length (in.)

Low-Medium Static

16

 

16

 

 

 

1...BX...42

 

1...BX...50

 

 

 

Pulley Center Line Distance (in.)

High Static

1...BX...42

 

1...BX...48

 

 

 

 

13.5-15.5

 

13.3-14.8

 

 

 

Speed Change per Full Turn of Movable

 

 

 

 

 

 

 

Pulley Flange (Rpm)

Low-Medium Static

58

 

37

 

 

 

Movable Pulley Maximum Full Turns

High Static

67

 

44

 

 

 

 

 

 

 

 

 

 

From Closed Position

 

4††

 

4††

 

 

 

Factory Speed

 

3.5

 

3.5

 

 

 

Factory Speed Setting (Rpm)

Low-Medium Static

978

 

965

 

 

 

 

High Static

1327

 

1134

 

 

 

HIGH-PRESSURE SWITCH (psig)

 

 

 

 

 

 

 

Cutout

 

426

 

 

 

 

 

 

 

 

 

Reset (Auto.)

 

320

 

 

551A155

 

LOW-PRESSURE SWITCH (psig)

 

 

 

 

 

 

Cutout

 

27

 

 

 

 

Reset (Auto.)

 

44

 

 

 

 

FREEZE PROTECTION THERMOSTAT (F)

 

 

 

 

 

 

 

Opens

 

30 ± 5

 

 

 

 

Closes

 

45 ± 5

 

 

-180

 

OUTDOOR-AIR INLET SCREENS

 

Cleanable

 

 

 

Quantity...Size (in.)

 

2...20 x 25 x 1

 

 

 

 

 

1...20 x 20 x 1

 

 

 

 

RETURN-AIR FILTERS

 

Throwaway

 

 

 

 

Quantity...Size (in.)

 

4...20 x 20 x 2

 

 

 

 

 

4...16 x 20 x 2

 

 

 

 

 

 

 

 

 

 

LEGEND

Al — Aluminum

Bhp — Brake Horsepower

Cu — Copper

TXV — Thermostatic Expansion Valve

*Evaporator coil fin material/condenser coil fin material.

†Weight of 14-in. roof curb.

**Circuit 1 uses the lower portion of condenser coil and lower portion of evapora- tor coils, and Circuit 2 uses the upper portion of both coils.

††Due to belt and pulley style, pulley cannot be set from 0 to 11/2 turns open.

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Bryant 551B, 558F manual PHYSICAL DATA - 551A155,180, Face Split
Page 150 Page 152

551A, 551B, 558F 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.
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