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Bryant Single Package Rooftop Electric Heating/Electric Cooling Unit 558D User Manual

Page 11

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Table 2 — Electrical Data (Cont)

UNIT
558D

NOMINAL

V-PH-Hz

IFM

TYPE

VOLTAGE

RANGE

COMPR

(each)

OFM

IFM

ELECTRIC HEAT*

POWER SUPPLY

DISCONNECT

SIZE**

Min

Max

RLA

LRA

FLA

FLA

Nominal kW

FLA

MCA

MOCP†

FLA

LRA

060

(5 Ton)

208/230-1-60

Std

187

254

28.8

147

1.4

5.9

43.3/ 43.3

60/ 60

42/ 42

159/159

4.9/ 6.5

23.5/27.1

43.3/ 43.3

60/ 60

42/ 42

159/159

6.5/ 8.7

31.4/36.3

46.6/ 52.7

60/ 60

43/ 49

159/159

9.8/13.0

46.9/54.2

66.0/ 75.1

70/ 80††

61/ 69

159/159

13.0/17.4

62.8/72.5

85.9/ 98.0

90/100††

79/ 90

159/159

15.8/21.0

75.8/87.5

102.2/116.8

110/125††

94/107

159/159

Alt

8.8

46.2/ 46.2

60/ 60

45/ 45

162/162

4.9/ 6.5

23.5/27.1

46.2/ 46.2

60/ 60

45/ 45

162/162

6.5/ 8.7

31.4/36.3

49.9/ 55.9

60/ 60

46/ 52

162/162

9.8/13.0

46.9/54.2

69.3/ 78.3

70/ 80††

64/ 72

162/162

13.0/17.4

62.8/72.5

89.2/101.3

90/110††

82/ 93

162/162

15.8/21.0

75.8/87.5

105.5/120.0

110/125††

97/110

162/162

208/230-3-60

Std

187

254

16.3

114

1.4

5.9

27.7/ 27.7

35/ 35

27/ 27

126/126

4.9/ 6.5

13.6/15.6

27.7/ 27.7

35/ 35

27/ 27

126/126

7.9/10.5

21.9/25.3

34.7/ 38.9

40/ 40

32/ 36

126/126

12.0/16.0

33.4/38.5

49.1/ 55.5

50/ 60

46/ 51

126/126

15.8/21.0

43.8/50.5

62.1/ 70.5

70/ 80††

57/ 65

126/126

19.9/26.5

55.2/63.8

76.4/ 87.1

80/ 90††

70/ 80

126/126

Alt

5.8

26.8/ 26.8

40/ 40

27/ 27

125/125

4.9/ 6.5

13.6/15.6

26.8/ 26.8

40/ 40

27/ 27

125/125

7.9/10.5

21.9/25.3

35.3/ 39.5

45/ 45

32/ 36

125/125

12.0/16.0

33.4/38.5

49.6/ 56.0

60/ 60

45/ 51

125/125

15.8/21.0

43.8/50.5

62.6/ 71.1

70/ 80††

57/ 65

125/125

19.9/26.5

55.2/63.8

77.0/ 87.6

80/100††

70/ 80

125/125

460-3-60

Std

414

508

7.4

64

0.8

3.2

13.3

20

13

69

6.0

7.2

13.3

20

13

69

11.5

13.8

21.3

25

20

69

14.0

16.8

25.0

30

23

69

23.0

27.7

38.6

40

36

69

25.5

30.1

41.6

45

38

69

Alt

2.6

12.7

20

12

70

6.0

7.2

12.7

20

12

70

11.5

13.8

21.0

25

19

70

14.0

16.8

24.8

30

22

70

23.0

27.7

38.3

45

35

70

25.0

30.1

41.3

45

38

70

575-3-60

Std

518

632

6.2

52

0.8

3.2

11.8

15

12

57

Alt

2.6

11.2

15

12

59

072

(6 Ton)

208/230-3-60

Std

187

254

23.6

146.0

1.4

5.2

36.1/ 36.1

45/ 45

35/ 35

191/191

4.9/ 6.5

13.6/15.6

36.1/ 36.1

45/ 45

35/ 35

191/191

7.9/10.5

21.9/25.3

36.1/ 38.1

45/ 45

35/ 35

191/191

12.0/16.0

33.4/38.4

48.2/ 54.6

50/ 60

44/ 50

191/191

15.8/21.0

43.8/50.5

61.2/ 69.6

70/ 70††

56/ 64

191/191

19.9/26.5

55.2/63.8

75.6/ 86.2

80/ 90††

70/ 79

191/191

460-3-60

Std

414

508

10.6

73.0

0.8

2.6

16.7

20

16

90

6.0

7.2

16.7

20

16

90

11.5

13.8

20.5

25

19

90

14.0

16.8

24.3

25

22

90

23.0

27.8

37.8

40

35

90

25.5

30.7

41.6

45

38

90

575-3-60

Std

518

632

8.5

58.4

0.8

2.6

13.3

20

14

75

IMPORTANT: Optional, alternate evaporator-fan motor and drive are not available for
558D072 units. Contact your local representative for more information about field-
installed motors.

LEGEND

COMPR — Compressor
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

*Available for field-installed accessory heaters only. Heater capacity (kW) is based on

heater voltage of 208 v, 240 v or 480 v. If power distribution voltage to unit varies from
rated heater voltage, heater kW will vary accordingly.

†Fuse or HACR circuit breaker.

**Used to determine minimum disconnect per NEC.

††Fusing single-point box provides the required branch circuit protection.

Ampacities are based on 460 v. MCA and MOCP are based on 575 v.

NOTES:
1. In compliance with NEC requirements for multimotor and combination load equip-

ment (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 voltage is greater than
2%. Use the following formula to determine the percent of 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

NOTE: The 575-v units are Canada only.

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 allow-
able 2%.

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

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