ELECTRICAL DATA

UNIT

NOMINAL

VOLTAGE

 

COMPRESSOR

 

 

 

OFM

 

IFM

POWER

COMBUSTION

POWER

VOLTAGE

RANGE

No. 1

No. 1A

 

No. 2

 

 

EXHAUST

FAN MOTOR

SUPPLY

 

 

 

 

 

 

580F

(3 Ph, 60 Hz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Min

Max

RLA

LRA

RLA

LRA

 

RLA

LRA

Qty

Hp

FLA (ea)

Hp

FLA

FLA

LRA

FLA

MCA

MOCP*

 

 

 

208/230

187

253

32.1

195

 

20.7

156

3

0.5

1.7

5.0

15.8/15.8

0.57

82/82

110/110

 

 

4.6

18.8

0.57

86/86

110/110

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

180

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

518

633

12

80

 

8.2

54

3

0.5

0.75

5.0

6.0

0.57

31

40

 

 

2.1

4.8

0.57

34

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

187

253

30.1

225

 

28.8

195

3

0.5

1.7

5.0

15.8/15.8

0.57

87/87

110/110

 

 

4.6

18.8

0.57

92/92

110/110

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

210

460

414

508

15.5

114

 

14.7

95

3

0.5

0.8

5.0

7.9

0.30

44

50

 

2.3

6.0

0.30

47

60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

518

632.5

12.1

80

 

10.7

80

3

0.5

0.75

5.0

6.0

0.57

34

40

 

 

2.1

4.8

0.57

36

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

187

253

42

239

 

33.6

225

2

1

6.6

7.5

25.0/25.0

0.57

124/124

150/150

 

 

4.6

18.8

0.57

129/129

150/150

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

240

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

518

633

13.8

80.0

 

13.5

80.0

2

1.0

3.4

7.5

10.0

0.57

48

60

 

 

2.1

4.8

0.57

50

60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

187.2

253

20.7

156

20.7

156

 

47.1

245

6

0.5

1.7

10.0

28.0/28.0

0.57

138/138

175/175

 

 

4.6

18.8

0.57

143/143

150/175

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

300

460

414

508

10

75

10

75

 

19.6

125

6

0.5

0.8

10.0

14.6

0.30

64

80

 

2.3

6

0.30

66

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

517.5

632.5

8.2

54

8.2

54

 

15.8

100

6

0.5

0.8

10.0

13.0

0.57

54

60

 

 

2.1

4.8

0.57

56

70

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEGEND

 

 

 

 

 

 

 

 

 

 

 

% Voltage Imbalance

 

 

 

 

 

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

*Fuse or HACR circuit breaker.

NOTES:

1. In compliance with NEC requirements for multimotor and combination load

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

Average Voltage =

452 + 464 + 455

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.

equipment (refer to NEC Articles 430 and 440), the overcurrent protective

% Voltage Imbalance = 100 x

7

580F180-300

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.

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%, con- tact your local electric utility company immediately.

192

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Image 192
Bryant 581A/B manual Exhaust FAN Motor Supply, Rla Lra, FLA LRA MCA Mocp, Fla, Hacr, Nec

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