Bryant 581C Manual De Usuario
197
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.
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
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
(BC) 464 – 457 = 7 v
(AC) 457 – 455 = 2 v
Maximum deviation is 7 v.
Determine percent voltage imbalance.
Determine percent 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%, con-
tact your local electric utility company immediately.
allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is more than 2%, con-
tact your local electric utility company immediately.
UNIT
579F
579F
NOMINAL
VOLTAGE
VOLTAGE
(3 Ph, 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)
Hp
FLA
FLA
LRA
FLA
MCA
MOCP*
180
(15 Tons)
208/230
187
253
28.8
195
28.8
195
3
0.5
1.7
3.7
10.5/11.0
—
—
0.57
81/81
100/100
4.6
18.8
0.57
85/86
110/110
460
414
508
14.7
95
14.7
95
3
0.5
0.8
3.7
4.8
—
—
0.30
40
50
2.3
6.0
0.30
43
50
575
518
633
10.8
80
10.8
80
3
0.5
0.8
3.0
3.9
—
—
0.57
30
40
2.1
4.8
0.57
32
40
216
(18 Tons)
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
633
12.1
80
10.8
80
3
0.5
0.8
5.0
6.0
—
—
0.57
34
40
2.1
4.8
0.57
36
40
240
(20 Tons)
208/230
187
253
37.8
239
30.1
225
2
1
6.6
7.5
25.0/25.0
—
—
0.57
116/116
150/150
4.6
18.8
0.57
120/120
150/150
460
414
508
17.2
125
15.5
114
2
1
3.3
7.5
13.0
—
—
0.30
57
70
2.3
6.0
0.30
59
70
575
518
633
12.4
80
12.1
80
2
1
3.4
7.5
10.0
—
—
0.57
44
50
2.1
4.8
0.57
46
50
300
(25 Tons)
208/230
187
253
41.0
350
37.8
239
2
1
6.6
10.0
28.0/28.0
—
—
0.57
130/130
150/150
4.6
18.8
0.57
135/135
175/175
460
414
508
21.8
158
17.2
125
2
1
3.3
10.0
14.6
—
—
0.30
66
80
2.3
6.0
0.30
68
80
575
518
633
17.3
125
12.4
80
2
1
3.4
10.0
13.0
—
—
0.57
54
70
2.1
4.8
0.57
56
70
FLA
— Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM
IFM
— Indoor (Evaporator) Fan Motor
LRA
— Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC
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
BC = 464 v
AC = 455 v
Average Voltage = 452 + 464 + 455
3
=
1371
3
= 457
% Voltage Imbalance = 100 x
7
457
= 1.53%
579
F18
0
-300