Table 5 — Electrical Data

UNIT

NOMINAL

VOLTAGE

 

COMPRESSOR

 

 

 

OFM

 

IFM

POWER

COMBUSTION

POWER

RANGE

No. 1

No. 1A

 

No. 2

 

 

EXHAUST

FAN MOTOR

SUPPLY

580F

VOLTAGE

 

 

 

 

 

 

 

(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

180

 

4.6

18.8

0.57

86/86

110/110

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

30.1

225

 

28.8

195

3

0.5

1.7

5.0

15.8/15.8

0.57

87/87

110/110

210

 

4.6

18.8

0.57

92/92

110/110

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

240

 

4.6

18.8

0.57

129/129

150/150

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

300

 

4.6

18.8

0.57

143/143

150/175

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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:

% 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

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.

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

% Voltage Imbalance = 100 x

7

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.

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.

X. STEP 10 — MAKE OUTDOOR-AIR INLET ADJUST-

MENTS

A. Manual Outdoor-Air Damper

All units (except those equipped with a factory-installed EconoMi$erIV) have a manual outdoor-air damper to provide ventilation air.

Damper can be preset to admit up to 25% outdoor air into return-air compartment. To adjust, loosen securing screws and move damper to desired setting, then retighten screws to secure damper (Fig. 18).

XI. STEP 11 — INSTALL OUTDOOR-AIR HOOD

 

The outdoor-air hood is common to 25% air ventilation and

 

EconoMi$erIV. If EconoMi$erIV is factory installed, all

 

electrical connections have been made and adjusted at the

Fig. 18 — Standard 25% Outdoor-Air Section Details

factory. Assemble and install hood in the field.

 

15

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Image 15
Bryant 580F Electrical Data, Make OUTDOOR-AIR Inlet Adjust Ments, Manual Outdoor-Air Damper, XI. Install OUTDOOR-AIR Hood

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