Bryant 580G Installation, Start-Up And Service Instructions Manual page 13

VOLTAGE
UNIT NOMINAL
RANGE
SIZE VOLTAGE
Min Max RLA LRA RLA LRA Qty Hp FLA
580G,H (3 Ph 60 Hz)
208/230 187
324 460 414
575 518
208/230 187
360 460 414
575 518
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.
or
NOTES:
1. In compliance with NEC requirements for multimotor and combina-
tion load equipment (refer to NEC Articles 430 and 440), the over-
current 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.
% Voltage Imbalance
max voltage deviation from average voltage
= 100 x
average voltage
Table 3— Electrical Data — 580G,H240-360 (cont)
COMPRESSOR
No. 1 No. 2
254 57.1 266 39.1 228
508 25.6 120 19.9 114
632 20.5 96 16.0 91
254 57.1 266 57.1 266
508 25.6 120 25.6 120
632 20.5 96 20.5 96
POWER
OFM IFM
EXHAUST
(ea) Hp FLA FLA LRA
10 30.8/ —
28.0 23.6 41.6
15 46.2/ —
2 1 5.3
42.0 23.6 41.6
20 59.4/ —
54.0 23.6 41.6
—
10 14.0
12.6 23.6
—
2 1 2.7 15 21.0
12.6 23.6
—
20 27.0
12.6 23.6
—
10 11.0
12.6 23.6
—
2 1 2.4 15 17.0
12.6 23.6
—
20 22.0
12.6 23.6
10 30.8/ —
28.0 23.6 41.6
15 46.2/ —
2 1 5.3
42.0 23.6 41.6
59.4/ —
20
54.0 23.6 41.6
—
10 14.0
12.6 23.6
—
2 1 2.7 15 21.0
12.6 23.6
—
20 27.0
12.6 23.6
—
10 11.0
12.6 23.6
—
2 1 2.4 15 17.0
12.6 23.6
—
20 22.0
12.6 23.6
EXAMPLE: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
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.
% Voltage Imbalance = 100 x
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.
—13—
COMBUSTION
POWER SUPPLY
FAN MOTOR
FLA MCA
— 0.96 151.9/149.1 200/200
0.96 175.5/172.7 225/225
— 0.96 167.3/163.1 200/200
0.96 190.9/186.7 225/225
— 0.96 180.5/175.1 225/225
0.96 204.1/198.7 250/250
— 0.50 71.3
0.50 83.9
— 0.50 78.3
0.50 90.9
— 0.50 84.3
0.50 96.9
— 0.50 57.4
0.50 70.0
— 0.50 63.4
0.50 76.0
— 0.50 68.4
0.50 81.0
— 0.96 169.9/167.1 225/200
0.96 193.5/190.7 250/225
— 0.96 185.3/181.1 225/225
0.96 208.9/204.7 250/250
— 0.96 198.5/193.1 250/250
0.96 222.1/216.7 275/250
— 0.50 77.0
0.50 89.6
— 0.50 84.0
0.50 96.6
— 0.50 90.0
0.50 102.6
— 0.50 61.9
0.50 74.5
— 0.50 67.9
0.50 80.5
— 0.50 72.9
0.50 85.5
452 + 464 + 455
3
1371
=
3
= 457
7
457
= 1.53%
MOCP*
90
100
100
110
100
110
70
90
80
90
80
100
100
110
100
110
110
125
80
90
80
100
90
100