MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O.

UNIT

 

 

COMBUSTION

POWER

 

 

NO C.O. or UNPWRD C.O.

 

 

 

NOM.

IFM

FAN MOTOR

EXHAUST

 

NO P.E.

 

 

w/ P.E. (pwrd fr/ unit)

 

V---Ph---Hz

TYPE

 

 

DISC. SIZE

 

 

 

DISC. SIZE

 

 

 

FLA

FLA

MCA

MOCP

 

 

MCA

 

MOCP

 

 

 

 

 

 

FLA

LRA

FLA

 

LRA

 

 

 

 

 

 

 

 

 

 

 

 

 

STD

 

 

43.6

50

46

198

47.4

 

60

51

 

202

 

208/230--- 3--- 60

MED

0.48

3.8

45.9

50

49

235

49.7

 

60

53

 

239

580J*08D,F

 

HIGH

 

 

53.8

60

58

261

57.6

 

70

62

 

265

 

STD

 

 

14.8

20

16

79

18.6

 

20

20

 

83

 

 

STD

 

 

20.1

25

21

97

21.9

 

25

23

 

99

 

460--- 3--- 60

MED

0.25

1.8

20.9

25

22

116

22.7

 

25

24

 

118

 

 

HIGH

 

 

25.3

30

27

129

27.1

 

30

29

 

131

 

575--- 3--- 60

MED

0.24

3.8

15.2

20

16

94

19.0

 

25

21

 

98

 

 

HIGH

 

 

18.3

20

19

108

22.1

 

25

24

 

112

 

 

STD

 

 

48.5

60

51

263

52.3

 

60

56

 

267

 

208/230--- 3--- 60

MED

0.48

3.8

53.3

60

57

306

57.1

 

70

61

 

310

580J*12D,F

 

HIGH

 

 

58.3

70

62

315

62.1

 

70

67

 

319

 

STD

 

 

17.9

20

19

95

21.7

 

25

23

 

99

 

 

STD

 

 

23.7

30

25

125

25.5

 

30

27

 

127

 

460--- 3--- 60

MED

0.25

1.8

25.5

30

27

147

27.3

 

30

29

 

149

 

 

HIGH

 

 

28.5

35

31

151

30.3

 

35

33

 

153

 

575--- 3--- 60

MED

0.24

3.8

18.7

25

20

106

22.5

 

25

24

 

110

 

 

HIGH

 

 

21.5

25

23

120

25.3

 

30

27

 

124

 

 

STD

0.48

3.8

65.5

80

69

365

69.3

 

80

73

 

369

 

208/230--- 3--- 60

MED

68.0

80

72

382

71.8

 

80

76

 

386

 

 

 

 

 

580J*14D,F

 

HIGH

Model not available

due to high amperage draw.

25

144

27.8

30

30

 

148

 

STD

 

 

24.0

30

 

 

 

STD

 

 

31.7

40

33

183

33.5

 

40

35

 

185

 

460--- 3--- 60

MED

0.25

1.8

32.7

40

35

192

34.5

 

45

37

 

194

 

 

HIGH

 

 

35.7

45

38

196

37.5

 

45

40

 

198

 

575--- 3--- 60

MED

0.24

3.8

24.0

30

25

144

27.8

 

30

30

 

148

 

 

HIGH

 

 

26.8

30

29

158

30.6

 

35

33

 

162

LEGEND:

 

 

 

 

Example: Supply voltage is 230-3-60

 

 

 

 

 

 

 

 

AB = 224 v

 

 

 

CO

---

Convenient outlet

 

 

 

 

 

DISC

---

Disconnect

 

 

BC = 231 v

 

 

 

FLA

---

Full load amps

 

 

AC = 226 v

 

 

 

IFM

---

Indoor fan motor

 

 

 

 

 

 

 

 

 

LRA

---

Locked rotor amps

 

 

(224 + 231 + 226)

 

681

MCA

---

Minimum circuit amps

Average Voltage =

 

 

 

 

=

 

 

MOCP

--- Maximum over current protection

 

3

 

 

3

PE

---

Power exhaust

 

 

 

 

 

 

 

 

 

UNPWRD CO

---

Unpowered convenient outlet

=

227

 

 

 

 

 

NOTES:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1. In compliance with NEC requirements for multimotor and

Determine maximum deviation from average voltage.

combination load equipment (refer to NEC Articles 430 and

(AB) 227 – 224 = 3 v

 

 

 

440), the overcurrent protective device for the unit shall be

(BC) 231 – 227 = 4 v

 

 

 

fuse or HACR breaker. Canadian units may be fuse or circuit

(AC) 227 – 226 = 1 v

 

 

 

breaker.

 

 

 

 

 

 

 

 

 

 

 

Maximum deviation is 4 v.

 

 

 

2. Unbalanced 3-Phase Supply Voltage

 

 

 

Determine percent of voltage imbalance.

 

 

 

Never operate a motor where a phase imbalance in supply

 

 

 

 

 

 

 

 

 

 

 

voltage is

greater than 2%. Use the following formula to

% Voltage Imbalance

 

= 100 x

 

 

4

 

 

determine the percentage of voltage imbalance.

 

 

 

 

 

 

 

227

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

= 1.76%

 

 

 

 

 

% Voltage Imbalance

= 100 x

max voltage deviation from average voltage

This amount of phase imbalance is satisfactory as it is below the

 

 

 

average voltage

 

 

 

 

maximum allowable 2%.

 

 

 

 

 

 

 

 

 

 

 

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

580J

81

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Image 81
Bryant 580J*08--14D appendix Unit Combustion Power, NOM IFM FAN Motor Exhaust No P.E, Type DISC. Size, Mocp

580J*08--14D, F specifications

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