Electrical Data - Bryant 579F User Manual

VOLTAGE
NOMINAL
UNIT
RANGE
VOLTAGE
579F
(3 Ph, 60 Hz)
Min
208/230 187
180
460 414
(15 Tons)
575 518
208/230 187
216
460 414
(18 Tons)
575 518
208/230 187
240
460 414
(20 Tons)
575 518
208/230 187
300
460 414
(25 Tons)
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.
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
max voltage deviation from average voltage
= 100 x
average voltage

ELECTRICAL DATA

COMPRESSOR
No. 1 No. 2
Max RLA LRA RLA LRA Qty Hp
253 28.8 195 28.8 195
508 14.7 95 14.7 95
633 10.8 80 10.8 80
253 30.1 225 28.8 195
508 15.5 114 14.7 95
633 12.1 80 10.8 80
253 37.8 239 30.1 225
508 17.2 125 15.5 114
633 12.4 80 12.1 80
253 41.0 350 37.8 239
508 21.8 158 17.2 125
633 17.3 125 12.4 80
OFM IFM
FLA (ea) Hp FLA
3 0.5 1.7 3.7 10.5/11.0
3 0.5 0.8 3.7 4.8
3 0.5 0.8 3.0 3.9
3 0.5 1.7 5.0 15.8/15.8
3 0.5 0.8 5.0 7.9
3 0.5 0.8 5.0 6.0
2 1 6.6 7.5 25.0/25.0
2 1 3.3 7.5 13.0
2 1 3.4 7.5 10.0
2 1 6.6 10.0 28.0/28.0
2 1 3.3 10.0 14.6
2 1 3.4 10.0 13.0
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.
% 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%, con-
tact your local electric utility company immediately.
197
POWER COMBUSTION
EXHAUST FAN MOTOR
FLA LRA FLA
— — 0.57
4.6 18.8 0.57
— — 0.30
2.3 6.0 0.30
— — 0.57
2.1 4.8 0.57
— — 0.57
4.6 18.8 0.57
— — 0.30
2.3 6.0 0.30
— — 0.57
2.1 4.8 0.57
— — 0.57
4.6 18.8 0.57
— — 0.30
2.3 6.0 0.30
— — 0.57
2.1 4.8 0.57
— — 0.57
4.6 18.8 0.57
— — 0.30
2.3 6.0 0.30
— — 0.57
2.1 4.8 0.57
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage = 452 + 464 + 455
3
1371
=
3
= 457
7
457
= 1.53%
POWER
SUPPLY
MCA MOCP*
81/81 100/100
85/86 110/110
40 50
43 50
30 40
32 40
87/87 110/110
92/92 110/110
44 50
47 60
34 40
36 40
116/116 150/150
120/120 150/150
57 70
59 70
44 50
46 50
130/130 150/150
135/135 175/175
66 80
68 80
54 70
56 70