Carrier 38AK008 User's Manual | Page 7

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7

Table 5 — Electrical Data

LEGEND

NOTES:
1. In compliance with NEC requirements for multimotor and combi-

nation load equipment (refer to NEC Articles 430 and 440), the
overcurrent protective device for the unit shall be fuse or HACR
breaker.

2. Unbalanced 3-Phase Supply Voltage

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

Example: Supply voltage is 460-3-60.

AB = 452 v
BC = 464 v
AC = 455 v

= 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.

% Voltage Imbalance = 100 x

 

= 1.53%

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

3. The 575-v units are CSA only.
4. the 380 v, 60 Hz units and all 50 Hz units are not  UL  or  CSA

listed.

UNIT

38

NOMINAL VOLTAGE

(V-Ph-Hz)

VOLTAGE RANGE

COMPRESSOR

OFM

POWER SUPPLY

MIN

MAX

RLA

LRA

FLA

MCA

MOCP

AK007

208/230-3-60

187

254

21.8

158

1.9

30.1

40

460-3-60

414

508

10.0

79

1.0

13.6

20

575-3-60

518

632

9.0

65

1.9

14.1

20

220-3-50

198

242

21.8

158

1.0

28.8

35

400-3-50

360

440

10.0

79

1.0

14.0

20

AK008

208/230-3-60

187

254

28.8

195

3.8

39.8

50

460-3-60

414

508

14.7

95

1.9

20.3

25

575-3-60

518

632

10.8

80

1.9

15.4

20

220-3-50

198

242

28.8

195

1.5

37.5

45

400-3-50

360

440

14.7

95

1.5

19.9

25

AK012

208/230-3-60

187

254

37.8

239

3.8

39.8

20

460-3-60

414

508

17.2

125

2.2

20.3

30

575-3-60

518

632

14.3

90

1.9

15.4

25

220-3-50

198

242

37.8

239

1.4

48.8

60

400-3-50

360

440

17.2

125

1.4

23.0

30

AKS008

208/230-3-60

187

254

31.5

160

3.1

42.5

50

380-3-60

342

418

19.0

75

2.2

26.0

35

460-3-60

414

508

15.7

80

1.4

21.0

25

575-3-60

518

632

12.6

64

1.4

17.2

20

220-3-50

198

253

31.5

160

1.4

42.5

50

400-3-50

342

460

15.7

80

1.4

21.0

25

AKS009

208/230-3-60

187

254

39.7

198

3.1

52.7

70

380-3-60

342

418

24.0

93

2.2

32.2

40

460-3-60

414

508

19.9

99

1.4

26.3

35

575-3-60

518

632

15.9

79

1.4

21.3

25

220-3-50

198

253

39.7

198

1.4

52.7

70

400-3-50

342

460

19.9

99

1.4

26.3

35

AKS012

208/230-3-60

187

254

39.7

198

3.1

52.7

70

380-3-60

342

418

24.0

93

2.2

32.2

40

460-3-60

414

508

19.9

99

1.4

26.3

35

575-3-60

518

632

15.9

79

1.4

21.3

25

220-3-50

198

253

39.7

198

1.4

52.7

70

400-3-50

342

460

19.9

99

1.4

26.3

35

CSA

— Canadian Standards Association

FLA

— Full Load Amps

HACR — Heating, Air Conditioning and Refrigeration
LRA

— Locked Rotor Amps

MCA

— Minimum Circuit Amps

MOCP — Maximum Overcurrent Protection
NEC

— National Electrical Code (U.S.A. Standard)

OFM

— Outdoor (Condenser) Fan Motor

RLA

— Rated Load Amps

UL

— Underwriters’ Laboratories

= 100 x

max voltage deviation from average voltage

average voltage

Average Voltage =

452 + 464 + 455

3

 =

1371

3

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

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