Specifications

47
ELECTRICAL DATA (cont)
581B090-150 STANDARD MOTOR (Units Without Electrical Convenience Outlet)
581B090-150 STANDARD MOTOR (Units With Electrical Convenience Outlet)
LEGEND
*Used to determine minimum disconnect per NEC.
†Fuse or HACR circuit breaker per NEC.
NOTES:
1. In compliance with NEC requirements for multimotor and combina-
tion load equipment (refer to NEC Articles 430 and 440), the overcur-
rent protective device for the unit shall be fuse or HACR breaker. The
UL, Canadian approved 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 voltage imbalance.
% Voltage imbalance
Example: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
= 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 of voltage imbalance.
% Voltage Imbalance = 100 x
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maxi-
mum allowable 2%.
IMPORTANT:
If the supply voltage phase imbalance is more than 2%,
contact your local electric utility company immediately.
UNIT
581B
NOMINAL
VOLTAGE
(V-Ph-Hz)
VOLTAG E
RANGE
COMPRESSOR OFM IFM
COMBUSTION
FAN MOTOR
POWER
SUPPLY
WITH OUTLET
MINIMUM UNIT
DISCONNECT
SIZE*
Min Max RLA LRA FLA FLA FLA MCA MOCP FLA LRA
090
208/230-3-60 187 254 12.4 88.0 1.4 7.5 .57 38.2/38.2 45/45† 40/40 242/242
460-3-60 414 508 6.4 44.0 0.7 3.4 .30 19.2 25† 20 121
575-3-60 518 632 4.8 34.0 0.7 3.4 .30 14.6 20† 16 95
102
208/230-3-60 187 254 15.0 99.0 1.4 7.5 .57 44.1/44.1 50/50† 46/46 264/264
460-3-60 414 508 8.2 49.5 0.7 3.4 .30 23.3 30† 24 132
575-3-60 518 632 5.8 40.0 0.7 3.4 .30 16.9 20† 18 107
120
208/230-3-60 187 254 18.9 125.0 1.4 10.6 .57 55.9/55.9 60/60† 59/59 341/341
460-3-60 414 508 9.0 62.5 0.7 4.8 .30 26.5 30† 28 171
575-3-60 518 632 7.1 50.0 0.7 4.8 .30 20.9 25† 22 136
150
208/230-3-60 187 254 19.0 156.0 1.4 15.0 .57 60.6/60.6 70/70 64/64 426/426
460-3-60 414 508 9.0 70.0 0.7 7.4 .30 29.1 35† 31 197
575-3-60 518 632 7.4 54.0 0.7 7.4 .30 23.7 30† 25 154
UNIT
581B
NOMINAL
VOLTAGE
(V-Ph-Hz)
VOLTAG E
RANGE
COMPRESSOR OFM IFM
COMBUSTION
FAN MOTOR
POWER
SUPPLY
WITH OUTLET
MINIMUM UNIT
DISCONNECT
SIZE*
Min Max RLA LRA FLA FLA FLA MCA MOCP FLA LRA
090
208/230-3-60 187 254 12.4 88.0 1.4 7.5 .57 44.2/44.2 50/50† 46/46 247/247
460-3-60 414 508 6.4 44.0 0.7 3.4 .30 21.9 25† 23 124
575-3-60 518 632 4.8 34.0 0.7 3.4 .30 16.8 20† 18 97
102
208/230-3-60 187 254 15.0 99.0 1.4 7.5 .57 50.1/50.1 60/60† 52/52 269/269
460-3-60 414 508 8.2 49.5 0.7 3.4 .30 26.0 30† 27 135
575-3-60 518 632 5.8 40.0 0.7 3.4 .30 19.1 25† 20 109
120
208/230-3-60 187 254 18.9 125.0 1.4 10.6 .57 61.9/61.9 70/70 64/64 345/345
460-3-60 414 508 9.0 62.5 0.7 4.8 .30 29.2 35† 30 173
575-3-60 518 632 7.1 50.0 0.7 4.8 .30 23.1 25† 24 139
150
208/230-3-60 187 254 19.0 156.0 1.4 15.0 .57 66.6/66.6 80/70 70/70 430/430
460-3-60 414 508 9.0 70.0 0.7 7.4 .30 31.8 35† 33 199
575-3-60 518 632 7.4 54.0 0.7 7.4 .30 25.9 30† 27 156
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
UL —
Underwriters’ Laboratories
= 100 x
max voltage deviation from average voltage
average voltage
Average Voltage =
452 + 464 + 455
3
=
1371
3
7
457