Electrical Data - Bryant 579F User Manual

VOLTAGE
NOMINAL
UNIT
RANGE
VOLTAGE
581A
(3 Ph, 60 Hz)
Min
208/230 187
155
(Standard 460 414
IFM)
575 518
208/230 187
155
(Optional
IFM)
460 414
208/230 187
180 460 414
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.
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 of volt-
age imbalance.
% Voltage Imbalance
max voltage deviation from average voltage
= 100 x
average voltage
ELECTRICAL DATA — 581A (cont)
ELECTRICAL DATA — 581A155,180
COMPRESSOR
No. 1 No. 2
Max RLA LRA RLA LRA Qty
253 20.7 156 20.7 156
506 10.0 75 10.0 75
633 8.2 54 8.2 54
253 20.7 156 20.7 156
506 10.0 75 10.0 75
253 32.1 195 20.7 156
506 16.4 95 10.0 75
633 12.0 80 8.2 54
OFM IFM
Hp FLA (ea) Hp FLA
3 0.5 1.70 2.9 8.8/ 8.4
3 0.5 0.80 2.9 4.2
3 0.5 0.75 3.0 3.9
3 0.5 1.70 3.7 10.5/11.0
3 0.5 0.80 3.7 4.8
3 0.5 1.70 5.0 15.8/15.8
3 0.5 0.80 5.0 7.9
3 0.5 0.75 5.0 6.0
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 of 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.
275
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
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
452 + 464 + 455
Average Voltage =
3
1371
=
3
= 457
7
457
= 1.53%
POWER
SUPPLY
MCA MOCP*
60/60 80/80
65/65 80/80
29 35
31 40
25 30
27 30
62/63 80/80
67/67 80/80
30 35
32 40
82/82 110/110
86/86 110/110
41 50
43 50
31 40
34 45