Bryant 581B RLA LRA FLA MCA Mocp, FAN Motor Disconnect SIZE†, With Outlet, Nec, Rla

Page 11

Table 2A — Electrical Data — Standard Motor Units Without Electrical Convenience Outlet

UNIT

 

NOMINAL VOLTAGE

VOLTAGE

COMPRESSOR

OFM

IFM

COMBUSTION

POWER

MINIMUM UNIT

 

RANGE

 

(each)

 

(each)

FAN MOTOR

SUPPLY*

DISCONNECT SIZE†

581B

 

(V-Ph-Hz)

 

 

 

 

Min

Max

Qty

RLA

LRA

FLA

FLA

FLA

MCA

MOCP**

FLA

LRA

 

 

 

 

208/230-1-60

187

254

 

16.0

88.0

0.7

4.9

.60

25.6/25.6

30/30

25/25

101/101

036

208/230-3-60

187

254

1

10.3

77.0

0.7

4.9

.60

18.5/18.5

25/25

18/18

90/90

(3 Tons)

460-3-60

414

508

5.1

39.0

0.4

2.2

.30

9.0

20

9

46

 

 

575-3-60

518

632

 

4.2

31.0

0.4

2.2

.30

7.3

20

7

37

048

 

208/230-1-60

187

254

 

23.7

126.0

0.7

4.9

.60

35.2/35.2

45/45

34/34

139/139

208/230-3-60

187

254

1

13.5

93.0

0.7

4.9

.60

22.5/22.5

30/30

22/22

106/106

(4 Tons)

460-3-60

414

508

6.4

46.5

0.4

2.2

.30

10.6

20

10

54

 

 

575-3-60

518

632

 

6.4

40.0

0.4

2.2

.30

10.1

20

10

46

060

 

208/230-1-60

187

254

 

28.8

169.0

1.5

8.8

.60

46.3/46.3

60/60

45/45

216/216

208/230-3-60

187

254

1

17.3

123.0

1.5

5.8

.60

28.9/28.9

35/35

28/28

168/168

(5 Tons)

460-3-60

414

508

9.0

62.0

0.8

2.6

.30

14.7

20

14

84

 

 

575-3-60

518

632

 

7.1

50.0

0.8

2.6

.30

11.6

20

12

68

072

 

208/230-3-60

187

254

 

20.5

156.0

1.4

5.8

.60

32.8/32.8

40/40

32/32

200/200

460-3-60

414

508

1

9.6

75.0

0.6

2.6

.30

15.2

20

15

97

(6 Tons)

575-3-60

518

632

 

7.7

56.0

0.6

2.6

.30

12.2

20

12

74

 

 

Table 2B — Electrical Data — Standard Motor Units With Electrical Convenience Outlet

 

 

VOLTAGE

COMPRESSOR

OFM

 

COMBUSTION

POWER

MINIMUM UNIT

UNIT

NOMINAL VOLTAGE

IFM

SUPPLY

RANGE

 

(each)

 

(each)

FAN MOTOR

DISCONNECT SIZE†

581B

(V-Ph-Hz)

 

 

 

WITH OUTLET*

 

 

 

 

 

 

 

 

 

 

 

 

Min

Max

Qty

RLA

LRA

FLA

FLA

FLA

MCA

MOCP**

FLA

LRA

 

208/230-1-60

187

254

 

16.0

88.0

0.7

4.9

.60

31.6/31.6

35/35

30/30

106/106

036

208/230-3-60

187

254

1

10.3

77.0

0.7

4.9

.60

24.5/24.5

30/30

24/24

95/95

(3 Tons)

460-3-60

414

508

5.1

39.0

0.4

2.2

.30

11.7

20

11

48

 

 

575-3-60

518

632

 

4.2

31.0

0.4

2.2

.30

9.5

20

9

38

 

208/230-1-60

187

254

 

23.7

126.0

0.7

4.9

.60

41.2/41.2

50/50

39/39

144/144

048

208/230-3-60

187

254

1

13.5

93.0

0.7

4.9

.60

28.5/28.5

35/35

27/27

111/111

(4 Tons)

460-3-60

414

508

6.4

46.5

0.4

2.2

.30

13.3

20

13

56

 

 

575-3-60

518

632

 

6.4

40.0

0.4

2.2

.30

12.2

20

12

47

 

208/230-1-60

187

254

 

28.8

169.0

1.5

8.8

.60

52.3/52.3

60/60

50/50

221/221

060

208/230-3-60

187

254

1

17.3

123.0

1.5

5.8

.60

34.9/34.9

40/40

34/34

173/173

(5 Tons)

460-3-60

414

508

9.0

62.0

0.8

2.6

.30

17.4

20

17

87

 

 

575-3-60

518

632

 

7.1

50.0

0.8

2.6

.30

13.8

20

13

70

072

208/230-3-60

187

254

 

20.5

156.0

1.4

5.8

.60

38.8/38.8

45/45

37/37

205/205

460-3-60

414

508

1

9.6

75.0

0.6

2.6

.30

17.9

20

17

99

(6 Tons)

575-3-60

518

632

 

7.7

56.0

0.6

2.6

.30

14.3

20

14

75

 

 

 

LEGEND

FLA

— Full Load Amps

HACR — Heating, Air Conditioning and

 

Refrigeration

IFM

— 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

UL

— Underwriters’ Laboratories

*The values listed in this table do not include power exhaust. See table at right for power exhaust requirements.

†Used to determine minimum disconnect per NEC. **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. The UL, Canada units may be fuse or circuit breaker.

2.Electrical data based on 95 F ambient outdoor-air temperature ± 10% voltage.

3.Unbalanced 3-Phase Supply Voltage

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

% Voltage Imbalance

max voltage deviation from average voltage

= 100 x

average voltage

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 of voltage imbalance.

7

% Voltage Imbalance = 100 x 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.

POWER EXHAUST ELECTRICAL DATA

POWER EXHAUST

MCA

MCA

MCA

MOCP

(for separate

PART NO.

(230 v)

(460 v)

(575 v)

power source)

 

 

 

 

CRPWREXH021A01

N/A

0.9

N/A

15

CRPWREXH022A01

3.3

N/A

1.32

15

CRPWREXH023A01

N/A

1.8

N/A

15

CRPWREXH028A01

1.7

N/A

0.68

15

CRPWREXH029A01

N/A

1.0

N/A

15

CRPWREXH030A01

1.6

N/A

0.64

15

N/A — Not available

NOTE: If a single power source is to be used, size wire to include power exhaust MCA and MOCP.

Check MCA and MOCP when power exhaust is powered through the unit. Deter- mine the new MCA including the power exhaust using the following formula:

MCA New = MCA unit only + MCA of Power Exhaust

For example, using a 581B072 unit with MCA = 32.8 and MOCP = 40, with CRPWREXH030A01 power exhaust.

MCA New = 32.8 amps + 1.6 amps = 34.4 amps

If the new MCA does not exceed the published MOCP, then MOCP would not change. The MOCP in this example is 40 amps and the MCA New is below 40; therefore the MOCP is acceptable. If “MCA New” is larger than the published MOCP, raise the MOCP to the next larger size. For separate power, the MOCP for the power exhaust will be 15 amps per NEC.

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Contents Provide Unit Support ContentsSafety Considerations InstallationIII. Determine Location of Drain Line and External Trap II. Field Fabricate DuctworkCRBTMPWR003A01 Roof Curb Unit Size Accessory CRRFCURB001A01CRBTMPWR001A01 CRBTMPWR002A01Positioning Install Flue HoodVI. Install GAS Piping IV. RIG and Place Unit060 Unit Operating Weight581B 036 048Physical Data 581B036-072 OUTDOOR-AIR Inlet Screens LOSS-OF-CHARGE SWITCH/LOW-PRESSUREFurnace Section Freeze Protection ThermostatBase Unit Dimensions 581B036-072 Steel Pipe Spacing of Supports Nominal Diameter Dimension Field Power SupplyField Control Wiring Heat Anticipator SettingsLow-Voltage Connections With or Without Economizer Power Wiring ConnectionsRLA LRA FLA MCA Mocp Power Exhaust MCA MocpFAN Motor Disconnect SIZE†FAN Motor Supply SIZE†LPS VIII. Adjust FACTORY-INSTALLED OptionsDisconnect Switch Perfect Humidity Dehumidification SystemManual Outdoor-Air Damper Damper Panel with Manual Outdoor-Air Damper InstalledOptional Manual Outdoor-Air Damper With Hood Attached EconoMi$er IV Standard Sensors Indoor Coil Access Panel RelocationBarometric Flow Capacity EconoMi$er IV Sensor Usage Supply Air Sensor Temperature/Resistance ValuesEconoMi$er IV Control Modes Return Air Temperature or Enthalpy Sensor Mounting Location Enthalpy Changeover Set Points Page 581B Fan Rpm at Motor Pulley Setting With High-Static Motor IX. Adjust EVAPORATOR-FAN Speed581B Fan Rpm at Motor Pulley Setting With Standard Motor AMP Draw Phase Continuous BHPUnit Maximum Unit Voltage 581BEvaporator-Fan Motor Data High-Static Motors Accessory/FIOP EconoMi$er IV Static Pressure* in. wgOutdoor Sound Power Total Unit 1292 1294 1175 1346 1275 1400 1147 9721265 1320 1310 1371 1419 1500 1175 1086760 666 257 778 367 871 471 952 572670 701 306 810 426 901 540 981 6511967 16491803 1470 17841049 731 967 5631008 643 805807 358 894 466 971 Rpm Bhp Watts 900 553 134782 316 870 417 948 1000 582 163740 382 643 234 762675 277 707 326919 561 800 350 904 438 999 535839 412 938 505 1030 605 879 483 974 580829 800 350 904 438 999 535 1087 640753 839 412 938 505 1030 605 1115 714General FAN Performance Notes START-UP Unit Preparation VI. Internal WiringVII. Refrigerant Service Ports PRE-START-UPXII. Heating CoolingXI. Main Burners XV. Operating Sequence XIII. Safety ReliefThermostat Input Economizer Function 581B Unit Operation Perfect Humidity Normal Design Cooling OperationVII. LOSS-OF-CHARGE Switch Service CleaningIV. ECONOMI$ER IV Adjustment VI. HIGH-PRESSURE SwitchUnit 581B To Use Cooling Charging Chart, Standard UnitLow Charge Cooling Perfect Humidity System ChargingCooling Charging Chart, Standard 581B036 Condenser FAN Must be Operating XI. COMBUSTION-AIR Blower XII. Limit SwitchXV. Replacement Parts Flue GAS PassagewaysMedium High Heat Units LOW Heat UnitsComp CAPOLR CLOLED OFF Troubleshooting Unit TroubleshootingLED Error Code Service Analysis Symptom Cause RemedyProblem Cause Remedy Heating Service AnalysisProblem Cause Remedy Cooling Service AnalysisII. ECONOMI$ER IV Troubleshooting Demand Control Enthalpy EconoMi$er IV Troubleshooting CompletionEconoMi$er IV Input/Output Logic Inputs OutputsIndex Page III. START-UP Electrical START-UP ChecklistTemperatures Preliminary Information
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581B specifications

The Bryant 581B is an innovative and highly efficient gas furnace that stands out in the HVAC market for its remarkable performance, reliability, and advanced features. Designed to provide optimal heating comfort, the Bryant 581B is perfect for homeowners seeking both quality and energy efficiency.

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For homeowners looking for enhanced control, the Bryant 581B is compatible with a range of smart thermostats, providing the ability to monitor and adjust heating settings remotely. This integration with smart technology ensures that homeowners can maintain their desired comfort levels while maximizing efficiency.

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