300

ELECTRICAL DATA

UNIT

NOMINAL

VOLTAGE

COMPRESSOR

 

OFM

 

 

IFM

POWER

COMBUSTION

POWER

VOLTAGE

RANGE

No. 1

No. 2

 

 

 

EXHAUST

FAN MOTOR

SUPPLY

579F

 

 

 

 

 

 

(3 Ph, 60 Hz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Min

Max

RLA

LRA

RLA

LRA

Qty

Hp

FLA (ea)

Hp

FLA

FLA

LRA

FLA

MCA

MOCP*

 

208/230

187

253

28.8

195

28.8

195

3

0.5

 

1.7

3.7

10.5/11.0

0.57

81/81

100/100

 

 

4.6

18.8

0.57

85/86

110/110

180

460

414

508

14.7

95

14.7

95

3

0.5

 

0.8

3.7

4.8

0.30

40

50

(15 Tons)

 

2.3

6.0

0.30

43

50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

518

633

10.8

80

10.8

80

3

0.5

 

0.8

3.0

3.9

0.57

30

40

 

 

2.1

4.8

0.57

32

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

216

460

414

508

15.5

114

14.7

95

3

0.5

 

0.8

5.0

7.9

0.30

44

50

(18 Tons)

 

2.3

6.0

0.30

47

60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

518

633

12.1

80

10.8

80

3

0.5

 

0.8

5.0

6.0

0.57

34

40

 

 

2.1

4.8

0.57

36

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

187

253

37.8

239

30.1

225

2

1

 

6.6

7.5

25.0/25.0

0.57

116/116

150/150

 

 

4.6

18.8

0.57

120/120

150/150

240

460

414

508

17.2

125

15.5

114

2

1

 

3.3

7.5

13.0

0.30

57

70

(20 Tons)

 

2.3

6.0

0.30

59

70

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

518

633

12.4

80

12.1

80

2

1

 

3.4

7.5

10.0

0.57

44

50

 

 

2.1

4.8

0.57

46

50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

187

253

41.0

350

37.8

239

2

1

 

6.6

10.0

28.0/28.0

0.57

130/130

150/150

 

 

4.6

18.8

0.57

135/135

175/175

300

460

414

508

21.8

158

17.2

125

2

1

 

3.3

10.0

14.6

0.30

66

80

(25 Tons)

 

2.3

6.0

0.30

68

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

518

633

17.3

125

12.4

80

2

1

 

3.4

10.0

13.0

0.57

54

70

 

 

2.1

4.8

0.57

56

70

 

 

 

 

 

 

 

 

 

 

 

 

 

 

579F180-

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

*Fuse or HACR circuit breaker.

NOTES:

1.In compliance with NEC requirements for multimotor and combina- tion load equipment (refer to NEC Articles 430 and 440), the over- current 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 per- cent voltage imbalance.

% Voltage Imbalance

= 100 x

max voltage deviation from average voltage

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.

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.

166

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Image 166
Bryant 581A/B 579F180, Unit Nominal Voltage Compressor OFM IFM Power Combustion, Range Exhaust FAN Motor Supply, Rla Lra

581A/B specifications

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