—13—
Table 4A — Electrical Data — Units Without Convenience Outlet
LEGEND
*Fuse or HACR circuit breaker.
NOTES:
1. In compliance with NEC requirements for multimotor and combination load equip-
ment (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.
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.
This amount of phase imbalance is satisfactory as it is below the maximum allow-
able 2%.
IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact the
local electric utility company immediately.
3. The convenience outlet full load amps (FLA) are 5, 3, and 3 for 208/230, 460,
575-V units, respectively.
581A
UNIT
SIZE
NOMINAL
VOLTAGE
(3 Ph,
60 Hz)
VOLTAGE
RANGE
COMPRESSOR
OFM IFM
POWER
EXHAUST
COMBUSTION
FAN MOTOR
POWER SUPPLY
DISCONNECT
SIZE
No. 1No. 2No. 3
Min Max RLA LRA RLA LRA RLA LRA Qty Hp
FLA
(ea)
Hp FLA Qty Hp
FLA
(ea)
FLA MCA MOCP* FLA
210
208/230 187 253 16.7 130 16.7 130 22.4 184 4 0.25 1.5
3.7 10.6/ 9.6
—— —
0.5
78/ 77 100/ 90 83/ 82
2 1 5.9 90/ 89 100/100 97/ 96
5 16.7/15.2
— — — 84/ 83 100/100 90/ 89
2 1 5.9 96/ 94 100/100 104/102
460 414 506 9 70 9 70 10.7 90 4 0.25 0.7
3.7 4.8
—— —
0.3
39 45 42
213.1 45 50 49
57.6
—— — 42 50 45
213.1 48 50 52
575 518 633 7 55 7 55 9.3 73 4 0.25 0.7
33.9
—— —
0.24
32 40 35
212.4 37 45 40
56.1
—— — 35 40 37
212.4 39 45 43
240
208/230 187 253 22.4 184 22.4 184 22.4 184 4 0.25 1.5
5 16.7/15.2
—— —
0.5
96/ 94 100/100 103/102
2 1 5.9 107/106 125/125 117/115
7.5 24.2/22
— — — 103/101 125/110 112/109
2 1 5.9 115/113 125/125 126/123
460 414 506 10.7 90 10.7 90 10.7 90 4 0.25 0.7
57.6
—— —
0.3
45 50 49
213.1 51 60 56
7.5 11
—— — 49 50 53
213.1 55 60 60
575 518 633 9.3 73 9.3 73 9.3 73 4 0.25 0.7
56.1
—— —
0.24
39 45 42
212.4 44 50 48
7.5 9
—— — 42 50 46
212.4 47 50 51
300
208/230 187 253 47.1 245 47.1 245 — — 6 0.25 1.5
7.5 24.2/22
—— —
0.5
139/137 175/175 147/144
2 1 5.9 151/149 175/175 160/158
10 30.8/28
— — — 146/143 175/175 154/151
2 1 5.9 158/155 200/200 168/164
460 414 506 19.6 125 19.6 125 — — 6 0.25 0.7
7.5 11
—— —
0.3
59 60 63
213.1 66 80 70
10 14
—— — 62 80 66
213.1 69 80 73
575 518 633 15.8 100 15.8 100 — — 6 0.25 0.7
7.5 9
—— —
0.24
49 60 52
212.4 54 60 57
10 11
—— — 51 60 54
212.4 56 60 59
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
% Voltage Imbalance
= 100 x
max voltage deviation from average voltage
average voltage
EXAMPLE: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =
452 + 464 + 455
3
=
1371
3
=457
% Voltage Imbalance = 100 x
7
457
= 1.53%
(80 pages)
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