Electrical data, 223 electrical data – Bryant 581C User Manual
Page 223
223
ELECTRICAL DATA
LEGEND
*Fuse or HACR circuit breaker.
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 percent voltage
imbalance.
% Voltage Imbalance
EXAMPLE: Supply voltage is 460-3-60.
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.
= 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%, con-
tact your local electric utility company immediately.
UNIT
580F
NOMINAL
VOLTAGE
(3 Ph, 60 Hz)
VOLTAGE
RANGE
COMPRESSOR
OFM
IFM
POWER
EXHAUST
COMBUSTION
FAN MOTOR
POWER
SUPPLY
No. 1
No. 1A
No. 2
Min
Max
RLA
LRA
RLA
LRA
RLA LRA Qty Hp FLA
(ea)
Hp
FLA
FLA
LRA
FLA
MCA
MOCP*
180
208/230
187
253
32.1
195
—
—
20.7
156
3
0.5
1.7
5.0 15.8/15.8
—
—
0.57
82/82
110/110
4.6
18.8
0.57
86/86
110/110
460
414
508
16.4
95
—
—
10
70
3
0.5
0.8
5.0
7.9
—
—
0.30
41
50
2.3
6.0
0.30
43
50
575
518
633
12
80
—
—
8.2
54
3
0.5
0.75
5.0
6.0
—
—
0.57
31
40
2.1
4.8
0.57
34
40
210
208/230
187
253
30.1
225
—
—
28.8
195
3
0.5
1.7
5.0 15.8/15.8
—
—
0.57
87/87
110/110
4.6
18.8
0.57
92/92
110/110
460
414
508
15.5
114
—
—
14.7
95
3
0.5
0.8
5.0
7.9
—
—
0.30
44
50
2.3
6.0
0.30
47
60
575
518
632.5
12.1
80
—
—
10.7
80
3
0.5
0.75
5.0
6.0
—
—
0.57
34
40
2.1
4.8
0.57
36
40
240
208/230
187
253
42
239
—
—
33.6
225
2
1
6.6
7.5 25.0/25.0
—
—
0.57
124/124
150/150
4.6
18.8
0.57
129/129
150/150
460
414
508
19.2
125
—
—
17.3
114
2
1
3.3
7.5
13.0
—
—
0.30
61
80
2.3
6.0
0.30
63
80
575
518
633
13.8
80.0
—
—
13.5
80.0
2
1.0
3.4
7.5
10.0
—
—
0.57
48
60
2.1
4.8
0.57
50
60
300
208/230
187.2
253
20.7
156
20.7
156
47.1
245
6
0.5
1.7
10.0 28.0/28.0
—
—
0.57
138/138
175/175
4.6
18.8
0.57
143/143
150/175
460
414
508
10
75
10
75
19.6
125
6
0.5
0.8
10.0
14.6
—
—
0.30
64
80
2.3
6
0.30
66
80
575
517.5 632.5
8.2
54
8.2
54
15.8
100
6
0.5
0.8
10.0
13.0
—
—
0.57
54
60
2.1
4.8
0.57
56
70
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
= 100 x
max voltage deviation from average voltage
average voltage
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
452 + 464 + 455
3
=
1371
3
= 457
% Voltage Imbalance = 100 x
7
457
5
80F
180
-3
00