Bryant 581A operation manual Electrical Data, FLA LRA MCA Mocp

Page 10

Table 2 — Electrical Data

 

NOMINAL

VOLTAGE

 

 

COMPRESSOR

 

 

OFM

 

 

IFM

POWER

COMBUSTION

POWER

UNIT

VOLTAGE

RANGE

 

No. 1

No. 2

 

 

 

 

 

 

 

EXHAUST

FAN MOTOR

SUPPLY

581A

(3 Ph, 60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hz)

Min

Max

RLA

 

LRA

RLA

 

LRA

Qty

Hp

FLA (ea)

Hp

 

FLA

FLA

LRA

FLA

MCA

MOCP*

015

208/230

 

187

253

20.7

 

156

19.3

 

123

3

0.5

1.7

2.9

 

8.8/

—

—

0.57

59/59

70/70

 

 

 

 

8.4

4.6

18.8

0.57

64/63

80/80

(Standard

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

—

—

0.30

29

35

IFM)

460

 

414

508

10

 

70

10

 

62

3

0.5

0.8

2.9

 

4.2

 

 

 

 

2.3

6.0

0.30

31

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

015

208/230

 

187

253

20.7

 

156

19.3

 

123

3

0.5

1.7

3.7

 

11.0/

—

—

0.57

61/61

80/80

 

 

 

 

10.5

4.6

18.8

0.57

66/65

80/80

(Optional

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

—

—

0.30

30

35

IFM)

460

 

414

508

10

 

70

10

 

62

3

0.5

0.8

3.7

 

4.8

 

 

 

 

2.3

6.0

0.30

32

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

 

187

253

32.1

 

195

20.7

 

156

3

0.5

1.7

5.0

 

15.8/

—

—

0.57

82/82

110/110

 

 

 

 

 

15.8

4.6

18.8

0.57

86/86

110/110

017

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

460

 

414

508

16.4

 

95

10

 

70

3

0.5

0.8

5.0

 

7.9

—

—

0.30

41

50

 

 

 

 

 

 

 

 

 

 

2.3

6.0

0.30

43

50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

 

187

253

42

 

239

33.6

 

225

2

1

6.6

7.5

 

25.0/

—

—

0.57

124/124

150/150

 

 

 

 

 

25.0

4.6

18.8

0.57

129/129

150/150

025

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

460

 

414

508

19.2

 

125

17.3

 

114

2

1

3.3

7.5

 

13.0

—

—

0.30

61

80

 

 

 

 

 

 

 

 

 

 

2.3

6.0

0.30

63

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEGEND

FLA

—

Full Load Amps

HACR —

Heating, Air Conditioning and

IFM

—

Refrigeration

Indoor (Evaporator) Fan Motor

LRA

—

Locked Rotor Amps

MCA

—

Minimum Circuit Amps

MOCP —

Maximum Overcurrent Protection

NEC

—

National Electrical Code

OFM

—

Outdoor (Condenser) Fan Motor

RLA

—

Rated Load Amps

*Fuse or HACR circuit breaker.

NOTES:

1.In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.

2.Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine the percent voltage imbalance.

% Voltage Imbalance

EXAMPLE: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

452 + 464 + 455

Average Voltage =

3

1371

=

3

= 457

Determine maximum deviation from average voltage.

(AB) 457 – 452 = 5 v (BC) 464 – 457 = 7 v (AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent voltage imbalance.

max voltage deviation from average voltage

% Voltage Imbalance = 100 x

7

= 100 x

average voltage

457

= 1.53%

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately.

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Page 9 Page 11
Contents Safety Considerations ContentsInstallation Provide Unit Support Roof Curb Details Positioning Alternate Unit SupportII. RIG and Place Unit Roof MountBase Unit Dimensions 581A155 Base Unit Dimensions 581A240 Physical Data Unit 581AIV. Make Unit Duct Connections Install Flue Hood and Wind BaffleIII. Field Fabricate Ductwork 581A180, 240 Unit ShownVI. Trap Condensate Drain VII. Install GAS PipingField Power Supply VIII. Make Electrical ConnectionsManual Outdoor-Air Damper Field Control WiringMake OUTDOOR-AIR Inlet Adjustments Optional EconomizerElectrical Data FLA LRA MCA MocpInstall OUTDOOR-AIR Hood 25% Outdoor-Air Section DetailsEnthalpy Control Installation Seal Strip LocationXI. Install ALL Accessories Motormaster I Control Installation 581A155 and 180 OnlySTART-UP II. Service ValvesIV. Refrigerant Service Ports Unit PreparationVII. Crankcase Heaters VI. Internal WiringXII. Accessory Economizer Adjustment VIII. Evaporator FANBhp Brake Horsepower Fan Performance 581A180270 Low Heat Units Fan Performance 581A240270 Low Heat Units 753 915 844 1077 949 1287 1047 753 942 844 1101 949 Fan Performance 581A180360 High Heat Units Fan Performance 581A240360 High Heat Units Fan RPM at Motor Pulley Setting Evaporator Fan Motor SpecificationsAccessory/FIOP Economizer Static Pressure in. wg Air Quantity LimitsXIII. GAS Heat XIV. Base Unit OperationService Cleaning IV. Evaporator FAN Service and Replacement II. Lubrication581A155 and 180 Units Fig Belt Tension AdjustmentVI. CONDENSER-FAN Adjustment 581A240 Units FigVIII. Power Failure VII. Economizer AdjustmentIX. Refrigerant Charge XII. Filter Drier GAS Valve AdjustmentXI. Main Burners XIII. Protective DevicesXIV. Relief Devices XVI. Replacement PartsXVII. Diagnostic Leds XV. Control CircuitSpark Gap Adjustment Typical Wiring Schematic and Typical Component Arrangement Typical Wiring Schematic 581A180, 208/230 V Unit Shown Typical Component Arrangement 581A180 Shown Cooling Service Analysis TroubleshootingProblem Cause Remedy Heating Service Analysis Burners will not igniteIGC Control Heating and Cooling Packaged Service Training Call for Free CatalogPage Pressures TemperaturesElectrical General
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581A specifications

The Bryant 581A is a pivotal model in the realm of heating, ventilation, and air conditioning (HVAC) systems, known for its robust performance and energy efficiency. As part of the Bryant product lineup, the 581A offers a blend of innovative technologies combined with reliable engineering, making it a suitable choice for both residential and light commercial applications.

One of the standout features of the Bryant 581A is its outstanding energy efficiency. With a Seasonal Energy Efficiency Ratio (SEER) rating of up to 16, this model meets Energy Star qualifications, ensuring that homeowners can enjoy lower utility bills while helping to reduce their environmental footprint. The efficiency is further enhanced by the unit’s environmentally friendly refrigerant, which not only improves performance but also aligns with modern sustainability standards.

Another key characteristic of the Bryant 581A is its durable construction. Designed to withstand various weather conditions, the unit features a robust cabinet that protects internal components. This durability not only prolongs the lifespan of the system but also minimizes the need for frequent maintenance or repairs. The coil design is optimized for heat transfer efficiency, enhancing the unit's overall performance in both cooling and heating modes.

In terms of technology, the Bryant 581A incorporates advanced control systems that enable precise temperature regulation. The multi-stage cooling capabilities ensure that the system can adapt to varying temperature demands, providing comfort in all seasons. Additionally, the model is compatible with smart thermostats, allowing homeowners to control their HVAC system remotely via smartphone or other connected devices.

Noise reduction is another aspect where the Bryant 581A excels. Equipped with a variable-speed compressor and sound-dampening features, this model operates quietly, minimizing disruption in residential or office environments. This focus on acoustic comfort makes it an ideal choice for those who value a peaceful living or working space.

Overall, the Bryant 581A represents an excellent balance of efficiency, durability, and modern technology. With features aimed at enhancing user comfort and reducing operational costs, it stands out as a reliable solution in the competitive HVAC market. Whether for new installations or replacements, the Bryant 581A is a testament to the brand’s commitment to quality and innovation in home climate control.
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