Bryant 580D User Manual
Page 57
ELECTRICAL DATA — 579F180-300
UNIT
NOMINAL
VOLTAGE
(60 Hz)
VOLTAGE
RANGE
COMPRESSOR
OFM
IFM
POWER
EXHAUST
COMBUSTION
FAN MOTOR
POWER SUPPLY
NO. 1
NO. 2
Min
Max
RLA
LRA
RLA
LRA
Qty
Hp
FLA
(ea)
FLA
FLA
LRA
FLA
MCA
MOCP†
180
(15
Tons)
208/230
(3 phase)
187
254
61.0
266
—
—
3
1
⁄
2
1.70
10.5/10.5
—
—
0.57
92/92
150/150
4.6
18.8
0.57
96/96
150/150
460
(3 phase)
414
508
28.0
120
—
—
3
1
⁄
2
0.80
4.8
—
—
0.30
42
70
2.3
6.0
0.30
45
70
216
(18
Tons)
208/230
(3 phase)
187
254
35.6
198
28.2
160
3
1
⁄
2
1.70
15.8/15.8
—
—
0.57
94/94
125/125
4.6
18.8
0.57
98/98
125/125
460
(3 phase)
414
508
17.8
99
14.1
80
3
1
⁄
2
0.80
7.9
—
—
0.30
47
60
2.3
6.0
0.30
49
60
240
(20
Tons)
208/230
(3 phase)
187
254
35.6
198
35.6
198
2
1
5.50
25.0/25.0
—
—
0.57
116/116
150/150
4.6
18.8
0.57
121/121
150/150
460
(3 phase)
414
508
17.8
99
17.8
99
2
1
2.80
13.0
—
—
0.30
59
70
2.3
6.0
0.30
61
70
300
(25
Tons)
208/230
(3 phase)
187
254
43.6
228
43.6
228
2
1
5.50
28.0/28.0
—
—
0.57
137/137
175/175
4.6
18.8
0.57
142/142
175/175
460
(3 phase)
414
508
22.1
114
22.1
114
2
1
2.80
14.6
—
—
0.30
70
90
2.3
6.0
0.30
72
90
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
*Used to determine minimum disconnect size per NEC.
†Fuse or HACR circuit breaker.
036-150 Only
180-300 Only
180-300 Only
036-072 Only
090-150 Only
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
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
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 allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.
57