Bryant 580J*08--14D Service And Maintenance Instructions page 81

NOM. IFM
V ---Ph---Hz TYPE
STD
208/230--- 3--- 60 MED
HIGH
STD
MED
460--- 3--- 60
HIGH
STD
575--- 3--- 60 MED
HIGH
STD
208/230--- 3--- 60 MED
HIGH
STD
MED
460--- 3--- 60
HIGH
STD
575--- 3--- 60 MED
HIGH
STD
MED
208/230--- 3--- 60
HIGH
STD
460--- 3--- 60 MED
HIGH
STD
MED
575--- 3--- 60
HIGH
LEGEND:
CO --- Convenient outlet
DISC --- Disconnect
FLA --- Full load amps
IFM --- Indoor fan motor
LRA --- Locked rotor amps
MCA --- Minimum circuit amps
MOCP --- Maximum over current protection
PE --- Power exhaust
UNPWRD CO --- Unpowered convenient outlet
NOTES:
1. In compliance with NEC requirements for multimotor and
combination load 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 percentage of voltage imbalance.
max voltage deviation from average voltage
% Voltage Imbalance = 100 x
MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O.
COMBUSTION POWER
FAN MOTOR EXHAUST
FLA FLA
0.48 3.8
0.25 1.8
0.24 3.8
0.48 3.8
0.25 1.8
0.24 3.8
0.48 3.8
Model not available due to high amperage draw.
0.25 1.8
0.24 3.8
average voltage
NO C.O. or UNPWRD C.O.
NO P .E.
DISC. SIZE
MCA MOCP
FLA LRA
43.6 50 46 198
45.9 50 49 235
53.8 60 58 261
20.1 25 21 97
20.9 25 22 116
25.3 30 27 129
14.8 20 16 79
15.2 20 16 94
18.3 20 19 108
48.5 60 51 263
53.3 60 57 306
58.3 70 62 315
23.7 30 25 125
25.5 30 27 147
28.5 35 31 151
17.9 20 19 95
18.7 25 20 106
21.5 25 23 120
65.5 80 69 365
68.0 80 72 382
31.7 40 33 183
32.7 40 35 192
35.7 45 38 196
24.0 30 25 144
24.0 30 25 144
26.8 30 29 158
Example: Supply voltage is 230-3-60
AB = 224 v
BC = 231 v
AC = 226 v
Average Voltage =
=
Determine maximum deviation from average voltage.
(AB) 227 – 224 = 3 v
(BC) 231 – 227 = 4 v
(AC) 227 – 226 = 1 v
Maximum deviation is 4 v.
Determine percent of voltage imbalance.
% Voltage Imbalance
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.
81
w/ P .E. (pwrd fr/ unit)
DISC. SIZE
MCA MOCP
FLA
47.4 60 51
49.7 60 53
57.6 70 62
21.9 25 23
22.7 25 24
27.1 30 29
18.6 20 20
19.0 25 21
22.1 25 24
52.3 60 56
57.1 70 61
62.1 70 67
25.5 30 27
27.3 30 29
30.3 35 33
21.7 25 23
22.5 25 24
25.3 30 27
69.3 80 73
71.8 80 76
33.5 40 35
34.5 45 37
37.5 45 40
27.8 30 30
27.8 30 30
30.6 35 33
(224 + 231 + 226)
=
3
227
4
= 100 x
227
= 1.76%
LRA
202
239
265
99
118
131
83
98
112
267
310
319
127
149
153
99
110
124
369
386
185
194
198
148
148
162
681
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